Drones deployed to monitor endangered species often crash. These crashes teach us that using drones for conservation is a contingent practice ensnaring humans, technologies, and animals. This article advances a crash theory in which pilots, conservation drones, and endangered megafauna are relata, or related actants, that intra-act, cocreating each other and a mutually constituted phenomena. These phenomena are entangled, with either reciprocal dependencies or erosive entrapments. The crashing of conservation drones and endangered species requires an ethics of care, (...) repair, or reworlding. Diffractions, disruptions that expose difference, result from crashes and reveal the precarious manner by which technologies, laws, and discourses bring nature and culture together. To support crash theory, this article presents three ethnographic cases. A drone crash in the United Kingdom near white rhinoceroses while building machine learning training data exhibits the involvement of the electromagnetic spectrum; the threat of crashes in the Pacific Northwest near Puget Sound orcas discloses the impacts of drone laws; and drone crashes in Sri Lanka among Asian elephants presents the problems of technoliberal ideals around programming natural worlds. Throughout the article, a methodology is developed, parallelism, which attends to the material similarities in lateral phenomena. (shrink)

Four species of fish (Danio rerio, Xenotoca eiseni, Carassius auratus and Pterophyllum scalare) were tested in a detour task requiring them to temporarily abandon the view of the goal-object (a group of conspecifics) to circumvent an obstacle. Fishes were placed in the middle of a corridor, at the end of which there was an opaque wall with a small window through which the goal was visible. Midline along the corridor two symmetrical apertures allowed animals to access two compartments (...) for each aperture. After passing the aperture, fishes showed searching behavior in the two correct compartments close to the goal, appearing able to localize it, although they had to temporarily move away from the object's view. Here we provide the first evidence that fishes can solve such a detour task and therefore seem able to represent the “permanence in existence” of objects, which continue to exist even if they are not momentarily visible. (shrink)

Questions about fish consciousness and cognition are receiving increasing attention. In this paper, I explain why one must be careful to avoid drawing conclusions too hastily about this hugely diverse set of species.

_Fish, Justice, and Society_ is a novel scholarly work that goes in depth into the fishing industry, fish, and aquatic environments. This book delves past the façade of what may be known by the average fisherman, bringing to the surface new information about numerous species and aquatic habitats.

As the world population is growing and government directives tell us to consume more fatty acids, the demand for fish is increasing. Due to declines in wild fish populations, we have come to rely more and more on aquaculture. Despite rapid expansion of aquaculture, this sector is still in a relatively early developmental stage. This means that this sector can still be steered in a favorable direction, which requires discussion about sustainability. If we want to avoid similar problems (...) to the ones we have experienced with livestock farming, we need to generate knowledge of the biology, profitability, environmental aspects, consumer awareness, and product appreciation of particular fish species. However, the discussion about a sustainable aquaculture also raises the question how we should treat fish. This moral question is regularly addressed as a problem of applied ethics with a focus on tailoring ethical principles to practical questions. In this article we do not deny the importance of the practical accounts, but we start from the fundamental question whether and why fish matter in our moral deliberations, i.e., from the discussion on moral status. We elaborate the distinction between moral considerability and moral significance in order to show both the importance and the limitations of the discussion about moral status for practical problems in aquaculture. We illustrate these points with a case-study about the farming of a specific fish species, the African catfish. (shrink)

This paper uses two case studies to explore an interest-relative view of taxonomy and how it complements kind pluralism in biology. First, I consider the ABC island bear, which can be correctly classified into more than one species. I argue that this classificatory pluralism can be explained by reference to the range of alternative explanatory interests in biology. In the second half of the paper, I pursue an interest-relative view of classification more generally. I then apply the resultant view (...) to a second case study: whether whales are fish. I argue that this question is not one about scientific vs folk usage, as has been assumed. I also develop a new view: that Fish should be rejected as a category, both from the point of view of biological science, and from the point of view of folk taxonomy. Along the way, I use the interest-relative view to shed light on the circumstances under which higher taxa should be accepted as legitimate categories for biological science. (shrink)

This article examines how the authorization of scientific discourses in the US Endangered Species Act of 1973 has influenced the ways people make claims about culturally significant animals. In it, I focus on struggles over the management of two endangered fish species among a federally recognized Native American tribe, state resource managers, and other actors. I discuss how the requirements of the ESA, namely that decisions regarding the protection of endangered species must be made based “solely (...) on the basis of the best scientific…data available,” have pushed people to reframe their cultural claims about the environment as scientific claims in order to gain legal authority. I argue that these animals span the social worlds of indigenous hunters and fishers, regulators, and ecological scientists. As such, they offer the opportunity to interrogate the relationships among ways of knowing the environment. I suggest that strict divisions among “types” of knowledge as well as hard-and-fast bonds between groups and “their” knowledge become problematic. Instead, people assemble eclectic articulations of knowledge to make the most authoritative claim possible in a given context, contradicting the assumption that certain people know the world only, or primarily, in a particular way. (shrink)

This is the Professional Thesis of the DPP that was conducted from February to May 2021. The research focuses on “Illegal Fishing Management in Lower Sesan 2 Reservoir, Stung Treng Province, Cambodia” with two research objectives: to understand the illegal fishing situation and to explore solutions to address the illegal fishing issues in the Lower Sesan 2 Reservoir. The research is approached by a Conceptual Framework addressing four elements of illegal fishing in the Lower Sesan 2 reservoir. Fourth eight community (...) fishery committee members and community fishery members (36% of whom are women) joined in group discussions and 35 local fishers and stakeholders were interviewed. Two types of data were gathered in this research: secondary and primary data. The livelihoods of local fishers and migrant fishers in Lower Sesan 2 reservoir were identified: fishing, rice production, farming, animal husbandry NTFP collection. Some local fishers and all migrant fishers including men, women and youths carried out illegal fishing in Lower Sesan 2. They used illegal fishing gears, caught endangered fish species, fished in conservation area, fished with illegal fishing gears in close fishing season, trading fish without license. The causes of illegal fishing in Lower Sesan 2 reservoir were found out. The performances and challenges, opportunities of stakeholders in fishery resource management in Lower Sesan 2 were identified. The strategies of sustainable fishery resource management were found out. Some recommendations were produced. (shrink)

Farming of fish and other aquatic species has increased in recent decades and never before have there been more controversial debates on animal welfare in fish husbandry. The practices used and associated welfare issues are becoming increasingly focused on by scientists, consumers and policy makers. International and national organisations have issued recommendations and guidelines concerning fish welfare but there is still a lot of information lacking. Due to § 2 of the German animal protection law, animals (...) must be adequately nourished, cared for and behaved in a proper manner, and pain or avoidable suffering or damage must be avoided. Keeping fish in accordance with the animal protection laws should be part of a good professional aquaculture practice and is indispensable for ethical, legal and economic reasons. As other vertebrates fish have the right of a healthy life with physical and mental integrity, under which they can perform adequately.The paper provides and discusses legal aspects of animal protection applied to fish taking the German welfare act and EU regulations as example. First possible indicators for the assessment of well-being will be mentioned. The assessment of fish welfare indicators should be carried out within the frame of daily and regular working routines, e. g. feeding, harvesting, grading or slaughtering. Further customer’s perception and human interpretation of welfare in fish are discussed and set into the context of human sentiments, projected on fish and the debate on consciousness in fish. (shrink)

We present a mathematical model of two competing marine species that are harvested. We consider three models according to different levels of complexity, without and with species refuge and density-independent and density-dependent species movement between fishing area and refuge. We particularly study the effects of the fishing pressure on the outcome of the competition. We focus on conditions that allow an inferior competitor to invade as a result of fishing pressure. The model is discussed in relationship to (...) the case of the thiof and the octopus along the Atlantic West African coast. At the origin, the thiof was abundant and the octopus scarce in that region. Since, the fishing pressure has strongly increased in some fishing areas leading to the depletion of the thiof and the invasion of its competitor, the octopus. (shrink)

New Zealand fisheries management reforms are being conducted in terms of 'balancing' of interests and reconciliation of conflicting claims over ownership and use. Fisheries legislation seeks efficient levels of fishing effort, while establishing 'environmental bottom lines' for stock conservation; resource management law requires, alongside efficiency of resource use, consideration for species diversity and 'the intrinsic values of ecosystems' ; and the Treaty of Waitangi safeguards customary practices and life-support requirements for the Maori people. This paper analyses these antinomies in (...) terms of contrasting ethical positions – utilitarian rationality, versus an ethic of reciprocal hospitality – and shows how fisheries management policies can be formulated on this basis. (shrink)

The “happy fish” passage concluding the “Autumn Floods” chapter of the Classical Chinese text known as the Zhuangzi has traditionally been seen to advance a form of relativism which precludes objectivity. My aim in this paper is to question this view with close reference to the passage itself. I further argue that the central concern of the two philosophical personae in the passage – Zhuangzi and Huizi – is not with the epistemic standards of human judgements (the established view (...) since Hansen, “The Relatively Happy Fish”), but with the more basic problem of species-specific perspectives. On my reading, Zhuangzi’s emphatic positionality in the passage – on the dam, accompanied by his friend Huizi – plausibly suggests a circumspect reflection on the limitedness of human knowledge. It is significant that Zhuangzi’s knowledge of fish happiness is avowedly from a certain place, and not absolute. But there is still a sense in which this view is objective: namely, insofar as it adequately accounts for an inherently human perspective on the world. I call this modest form of relativism ‘Species Relativism’, which, crucially, leaves room for objectivity, even though a fully objective (i.e. absolute) view of the world is not accessible to humans. (shrink)

Mercury contamination of local fish stocks has become an escalating problem in the United States. Federal and state governments increasingly have issued fish consumption advisories to warn individuals of the risks of eating specific species of fish in particular quantities from individual bodies of water. Some indigenous groups in the United States who rely on these fisheries for subsistence and ritual cultural reasons have become disproportionately impacted by the risks of mercury contamination of their food source. (...) Some of these groups are forced to make a decision whether to continue their cultural life ways and become exposed to mercury or to stop eating fish and witness the degradation of their identity. This article explores the unique conditions of cultural fishing practices among Native American groups in the United States and their disproportionate risk to mercury contamination. Spatial analysis using the geographical information systems software is accompanied by two case studies to explore the risks faced by indigenous communities. (shrink)

As the efficiency and reach of global fishing has grown, overfishing has unwittingly undermined the industry’s future while at the same time depriving poor people of a dietary staple. Several problems that most concern the critics of globalization come into play: undermining the power of governments to protect their environments and citizens, an economic system that robs the poor and future generations of basic necessities, and market developments that undercut long term economic and environmental stability. I examine how creative institutional (...) measures could avert total collapse of ocean ecosystems despite the complexity of enacting marine ethics in a globalized economy. I look at companies that work with the Marine Stewardship Council’s criteria as well as more creative measures including revamped marketing and changes in how members of the industry work together in order to encourage long term environmental and economic sustainability. (shrink)

Pigment cells in zebrafish − melanophores, iridophores, and xanthophores − originate from neural crest‐derived stem cells associated with the dorsal root ganglia of the peripheral nervous system. Clonal analysis indicates that these progenitors remain multipotent and plastic beyond embryogenesis well into metamorphosis, when the adult color pattern develops. Pigment cells share a lineage with neuronal cells of the peripheral nervous system; progenitors propagate along the spinal nerves. The proliferation of pigment cells is regulated by competitive interactions among cells of the (...) same type. An even spacing involves collective migration and contact inhibition of locomotion of the three cell types distributed in superimposed monolayers in the skin. This mode of coloring the skin is probably common to fish, whereas different patterns emerge by species specific cell interactions among the different pigment cell types. These interactions are mediated by channels involved in direct cell contact between the pigment cells, as well as unknown cues provided by the tissue environment. (shrink)

Certain species of fish have recently become important model systems in comparative genomics and in developmental biology, in certain instances because of their small genome sizes (e.g., in the pufferfish) and, in other cases, because of the opportunity they provide to combine an easily accessible and experimentally manipulable embryology with the power of genetic approaches (e.g., in the zebrafish). The resulting accumulation of genomic information indicates that, surprisingly, many gene families of fish consist of more members than (...) in mammals. Most modern fish, including the zebrafish and medakka, are diploid organisms; however, the greater number of genes in fish was possibly caused by additional ancient genome duplications which happened in the lineage leading to modern ray-finned fishes but not along the lineage leading to tetrapods. Since these two lineages shared their last common ancestor (in the Devonian about 360 million years ago) individual duplicated members of gene families were later lost in fish. Interestingly, comparative data indicate that, in some cases, genes in mammals even serve somewhat different functions than their homologues in fish, highlighting that the degree of evolutionary relatedness of genes is not always a reliable predictor of their evolutionary conservation and their similarity of function. Since fish are phenotypically probably not more complex than mammals, it is possible that evolution took alternative paths to the “economics of genomics” through alternative solutions to gene regulation. It is suggested that the more complex genomic architecture of fish permitted them to adapt and speciate quickly in response to changing selective regimes. BioEssays 20:511–515, 1998. © 1998 John Wiley & Sons, Inc. (shrink)

We argue that the common attribution to Zhuangzi of both perspectivalism or relativism on the one hand, and scepticism on the other is fundamentally mistaken. While granting that it is reasonable to construe Zhuangzi as offering a perspectiva! position on judgement, we argue that Zhuangzi's perspectivalism does not commit him to a relativist position on truth or to scepticism about human knowledge. Rather, we maintain that Zhuangzi's attacks on the concepts of truth and knowledge are better seen as his articulation (...) of a species of epistemological nihilism which rejects, as ultimately meaningless, the concepts of truth, reality, and knowledge. (shrink)

With the rapid emergence of the technology of deep learning, it was successfully used in different fields such as the aquatic product. New opportunities in addition to challenges can be created according to this change for helping data processing in the smart fish farm. This study focuses on deep learning applications and how to support different activities in aquatic like identification of the fish, species classification, feeding decision, behavior analysis, estimation size, and prediction of water quality. Power (...) and performance of computing with the analyzed given data are applied in the proposed DL method within fish farming. Results of the proposed method show the significance of contributions in deep learning and how automatic features are extracted. Still, there is a big challenge of using deep learning in an era of artificial intelligence. Training of the proposed method used a large number of labeled images got from the Fish4Knowledge dataset. The proposed method based on suitable feature extracted from the fish achieved good results in terms of recognition rate and accuracy. (shrink)

Following a controversy over the construction of a waste incinerator in the Fos-sur-Mer industrial area, residents pointed to the lack of knowledge of the industry’s cumulative impact on their health and environment. Under pressure, some of their elected representatives supported the creation of an independent scientific organization, the Ecocitizen Institute for Pollution Awareness. Its objective was to conduct localized scientific research on the effects of pollution and to lobby the administration to change its regulatory practices. This paper examines the efforts (...) made to ensure that the “undone science” gets done, by focusing on the specificities of this industrialized site. We look at a participatory biomonitoring experiment that aimed to document pollution in the Gulf of Fos where scientists working for the IECP accepted anglers’ requests and switched from an acknowledged sentinel species to another species. We tell the many stories that were shared with us about how conger qualified as a more suitable “cosmopolitical fish” in the study of pollution. Elaborating on actor–network theory and multispecies ethnographies, we discuss the appropriateness of congers as the newly appointed sentinel species. We argue that this demonstrates the importance of the “ecology of relations” in maintaining the livability of the area. (shrink)

Current climate change has raised concerns over the fate of the stenothermal Antarctic marine fauna (animals that evolved to live in narrow ranges of cold temperatures). The present paper focuses on Notothenioidei, a taxonomic group that dominates Antarctic fish. Notothenioids evolved in the Southern Ocean over the last 20 million years, providing an example of a marine species flock with unique adaptations to the cold at morphological, physiological and biochemical levels. Their phenotypic modifications are often accompanied by ‘irreversible’ (...) genomic losses or gene amplifications. On a micro‐evolutionary scale, relatively ‘shallow’ genetic variation is observed, on account of past fluctuations in population size, and a significant genetic structure is evident, suggesting low population connectivity. These features suggest that Antarctic fish might have relatively little potential to adapt to global warming, at least at a genetic level. The extent of their phenotypic plasticity, which is evident to some degree, awaits further research. (shrink)

Current climate change has raised concerns over the fate of the stenothermal Antarctic marine fauna (animals that evolved to live in narrow ranges of cold temperatures). The present paper focuses on Notothenioidei, a taxonomic group that dominates Antarctic fish. Notothenioids evolved in the Southern Ocean over the last 20 million years, providing an example of a marine species flock with unique adaptations to the cold at morphological, physiological and biochemical levels. Their phenotypic modifications are often accompanied by ‘irreversible’ (...) genomic losses or gene amplifications. On a micro‐evolutionary scale, relatively ‘shallow’ genetic variation is observed, on account of past fluctuations in population size, and a significant genetic structure is evident, suggesting low population connectivity. These features suggest that Antarctic fish might have relatively little potential to adapt to global warming, at least at a genetic level. The extent of their phenotypic plasticity, which is evident to some degree, awaits further research. (shrink)

A study was carried out from October, 2020 to September, 2021to investigate the diversity of fishes and the conservation status of Chittaura Jheel (Bahraich), Uttar Pradesh. During the study period, 38 fish species belonging to 28 genera, 14 families and 7 orders have been identified. The order Cypriniformes was found the dominated order with 15 species(39.47%) followed by Siluriformes 10 species (26.31%), Perciformes 4 species (10.52%), Ophiocephaliformes 4 species (10.52%), Synbranchiformes2 species (5.26%), Osteoglossiformes (...) 2 species (5.26%) and Clupiformes 1 species (2.63 %), The present investigation showed that the wetland, Chittaura Jheel possesses rich fish biodiversity but proper conservation measures are required to maintain sustainability and richness of the fish species diversity of that wetland of U.P. According to IUCN, 30 were enlisted as Least Concern (LC), 2 species as near endangered (NE), 3 species as near threatened (NT), 2 listed as Endangered (EN) and 1 species was listed as Vulnerable (VU). There is a need of conservation of fish diversity of this natural wetland. The pressure is increasing day by day due to increasing population, leading to loss of fish diversity hence identifying the problem and making a better management plan is the way for conservation of the fish diversity of the Chittaura Jheel, a wetland of Bahraich district of Uttar Pradesh. (shrink)

This article argues for an alternative interpretation of the happy fish scene in The Zhuangzi: the fish are not happy. The fish undergo an unpleasant experience while the philosophers debate animatedly over the joy of the fish. The dramatization of the fish scene compels us to contemplate anthropocentrism and species communication. Moreover, the contrast between the fish-bird becoming and the subsequent human narrations reinforces the anthropocentric usurpation of nonhuman agency. To get away from (...) anthropocentrism, Zhuangzi proposes a posthumanist approach to deal with species communication in three interconnected stages: to acknowledge the limits of human cognition, to forget anthropocentric prejudice, and to de-obscure childlike innocence. (shrink)

Increasing public concern for the welfare of fish species that human beings use and exploit has highlighted the need for better understanding of the cognitive status of fish and of their ability to experience negative emotions such as pain and fear. Moreover, studying emotion and cognition in fish species broadens our scientific understanding of how emotion and cognition are represented in the central nervous system and what kind of role they play in the organization of (...) behavior. For instance, on a macro neuro-architecture level the brains of fish species look dramatically different from those of mammals, while such a dramatic difference does not (always) occur at the level of emotion- and cognition-related behavior. Here, therefore, we discuss the evidence of emotion and cognition in fish species related to underlying neuro-architecture and the role that emotion and cognition play in the organization of behavior. To do so we use a framework encompassing a number of steps allowing a systematic approach to these issues. Emotion and cognition confer on human and non-human animals the capacity to compliment and/or override immediate reflexes to stimuli and so allow a large degree of flexibility in behavior. Systematic research on behavior that in mammals is indicative of emotion and cognition has been conducted in only a few fish species. The data thus far indicate that in these species brain-behavior relationships are not fundamentally different from those observed in mammals. Furthermore, data from other studies show evidence that behavior patterns related to emotion and cognition vary between fish species as well within fish species, related to sex and life history stage for example. From a welfare perspective, knowledge of such variability will potentially help us to design optimal living conditions for fish species kept by humans. (shrink)

Increasing public concern for the welfare of fish species that human beings use and exploit has highlighted the need for better understanding of the cognitive status of fish and of their ability to experience negative emotions such as pain and fear. Moreover, studying emotion and cognition in fish species broadens our scientific understanding of how emotion and cognition are represented in the central nervous system and what kind of role they play in the organization of (...) behavior. For instance, on a macro neuro-architecture level the brains of fish species look dramatically different from those of mammals, while such a dramatic difference does not (always) occur at the level of emotion- and cognition-related behavior. Here, therefore, we discuss the evidence of emotion and cognition in fish species related to underlying neuro-architecture and the role that emotion and cognition play in the organization of behavior. To do so we use a framework encompassing a number of steps allowing a systematic approach to these issues. Emotion and cognition confer on human and non-human animals the capacity to compliment and/or override immediate reflexes to stimuli and so allow a large degree of flexibility in behavior. Systematic research on behavior that in mammals is indicative of emotion and cognition has been conducted in only a few fish species. The data thus far indicate that in these species brain-behavior relationships are not fundamentally different from those observed in mammals. Furthermore, data from other studies show evidence that behavior patterns related to emotion and cognition vary between fish species as well within fish species, related to sex and life history stage for example. From a welfare perspective, knowledge of such variability will potentially help us to design optimal living conditions for fish species kept by humans. (shrink)

Assuming that both humans and nonhuman organisms have intrinsic value, the concept of a “death with dignity” should extend to the natural world. Recently, an effort has been undertaken to save the razorback sucker, an endangered species of fish in the Colorado River. Razorback are bred and raised in captivity and transferred to the river only when large enough to survive predation by nonnative fish. While this effort is well-intentioned, there is little chance that the razorback will (...) again live unassisted in the Colorado River. There may be human-centered reasons for saving the razorback. However, just as respecting a person sometimes requires limiting his or her life-sustaining medical treatment, so too respecting the razorback may require removing human assistance with its reproductive cycle. (shrink)

Assuming that both humans and nonhuman organisms have intrinsic value, the concept of a “death with dignity” should extend to the natural world. Recently, an effort has been undertaken to save the razorback sucker, an endangered species of fish in the Colorado River. Razorback are bred and raised in captivity and transferred to the river only when large enough to survive predation by nonnative fish. While this effort is well-intentioned, there is little chance that the razorback will (...) again live unassisted in the Colorado River. There may be human-centered reasons for saving the razorback. However, just as respecting a person sometimes requires limiting his or her life-sustaining medical treatment, so too respecting the razorback may require removing human assistance with its reproductive cycle. (shrink)

An important mechanism for the evolution of phenotypic complexity, diversity and innovation, and the origin of novel gene functions is the duplication of genes and entire genomes. Recent phylogenomic studies suggest that, during the evolution of vertebrates, the entire genome was duplicated in two rounds (2R) of duplication. Later, ∼350 mya, in the stem lineage of ray‐finned (actinopterygian) fishes, but not in that of the land vertebrates, a third genome duplication occurred—the fish‐specific genome duplication (FSGD or 3R), leading, at (...) least initially, to up to eight copies of the ancestral deuterostome genome. Therefore, the sarcopterygian (lobe‐finned fishes and tetrapods) genome possessed originally only half as many genes compared to the derived fishes, just like the most‐basal and species‐poor lineages of extant fishes that diverged from the fish stem lineage before the 3R duplication. Most duplicated genes were secondarily lost, yet some evolved new functions. The genomic complexity of the teleosts might be the reason for their evolutionary success and astounding biological diversity. BioEssays 27:937–945, 2005. © 2005 Wiley Periodicals, Inc. (shrink)

How vertebrates evolved different traits for acid excretion to maintain body fluid pH homeostasis is largely unknown. The evolution of Na+/H+ exchanger (NHE)‐mediated NH4+ excretion in fishes is reported, and the coevolution with increased ammoniagenesis and accompanying gluconeogenesis is speculated to benefit vertebrates in terms of both internal homeostasis and energy metabolism response to acidic stress. The findings provide new insights into our understanding of the possible adaptation of fishes to progressing global environmental acidification. In human kidney, titratable H+ and (...) NH4+ comprise the two main components of net acid excretion. V‐type H+‐ATPase‐mediated H+ excretion may have developed in stenohaline lampreys when they initially invaded freshwater from marine habitats, but this trait is lost in most fishes. Instead, increased reliance on NHE‐mediated NH4+ excretion is gradually developed and intensified during fish evolution. Further investigations on more species will be needed to support the hypothesis. Also see the video abstract here https://youtu.be/vZuObtfm-34. (shrink)

Parentage analyses via microsatellite markers have revealed multiple paternity within the broods of polytocous species of mammals, reptiles, amphibians, fishes and invertebrates. The widespread phenomenon of multiple paternity may have attending relationships with such evolutionary processes as sexual selection and kin selection. However, just how much multiple paternity should a species exhibit? We developed Bayesian null models of how multiple paternity relates to brood sizes. For each of 114 species with published data on brood sizes and numbers (...) of sires, we compared our null model estimates to published frequencies of multiple paternity. The majority of species fell close to our null model, especially among fish and invertebrate species. Some species, however, had low probabilities of multiple paternity, far from the predictions of the null model, likely due to sexual selection and environmental constraints. We suggest a major division among species’ mating systems between those with close to random mating and high levels of multiple paternity, and those with constraints that produce low levels of multiple paternity. (shrink)

Endangered species are objects of intense scientific scrutiny and political conflict. This article focuses on the interplay among human-nonhuman relations, knowledge production, and the politics of endangerment. Advancing a historical ontology of endangerment, it highlights the role of transforming the nonhuman world in the coming to be of new objects of environmental knowledge. Such knowledge can provide the basis for credible claims of endangerment, facilitating mobilizations against the very human-nonhuman relations that produced it. An in-depth case study of the (...) delta smelt, an endangered species of fish caught in the center of California’s “water wars,” shows how changes in the instrumentalization of the nonhuman environment can produce new knowledge of nature that allows actors to make claims and form coalitions that would be otherwise inconceivable. Because its sole habitat is the hub of California’s water delivery system, efforts to save the species from extinction have reduced flows to farms and cities, fomenting conflict between environmentalists and water users. This article demonstrates that the taxonomic classification of the delta smelt as a species and evidence of its decline arose directly from the reengineering of California’s rivers for extractive ends. Ironically, the knowledge on which environmental advocates relied was a product of the instrumental relation to nature that they sought to transform. (shrink)

Almost 250 years after the publication of the taxonomy-founding work Systema Naturae, by Carl Linnaeus, the inventory and catalogue of the planet's biodiversity is still far from complete: only ca 1.5 to 1.8 million of an estimated 10+ million species are so far described. Notwithstanding the remarkable merits of the Linnean system, the task is too vast ever to be completed using current conventional approaches. Such a staggering reality, and the customary difficulty that the scientific community and society in (...) general experience to access taxonomic knowledge, has prompted the search for novel tools or approaches for species identification. Such a tool has been recently proposed in the form of a standardised short DNA sequence from an agreedupon region of the genome, which is expected to ultimately provide a means of fast and robust identification of any species on the planet: the DNA barcode. Received with as much enthusiasm by some as skepticism by others, this novel tool was set in motion on a worldwide scale by means of an international consortium of organisations (the Consortium for the Barcoding of Life), thus becoming a large-scale horizontal genomics project. While anchored within the knowledge and principles of taxonomy, DNA barcoding possesses unique characteristics which anticipate a diverse scope of new applications and benefits for society. Notably, it places the completion of the biodiversity catalogue within the reach of a single generation, with the promise to assist greatly in the discovery of new species. Alongside long-term, ultimate goals, such as democratisation of access to taxonomic knowledge and assistance in writing the encyclopaedia of life, there are several more prosaic applications that may also impact society, not only in certain scientific fields, but also in a range of social and economic activities. Here, we will use DNA barcoding of fish as an example to illustrate foreseen applications, and as a basis to stimulate reflection on potential societal impacts of this horizontal genomics project. (shrink)

A questionnaire was used to assess people's attitudes toward 33 species of animals on six dimensions . A cluster analysis resulted in five groups of animals with similar ratings on these dimensions. Respondents were also asked about their attitudes toward hunting, fishing, and medical, scientific and product-testing research using animals.

In Scotland, residents have fought open-net salmon farms and their toll on human and nonhuman bodies for decades. This paper recollects seven years of work in Skye and Raasay, two islands off the northwest coast of the country, developing strategies to divest away from salmon aquaculture. Addressing the contemporary wave of underwater clearances created by UK’s top food export industry, it unpacks the implementation of a transition into alternative horizons by embracing the legacies of toxicity inherited from salmon extractivist industries. (...) CLIMAVORE, a framework developed as a research-led artistic practice by the authors, investigates how to eat in the new seasons of the climate crisis. In a season of marine dead zones, it facilitates new approaches to aquaecology and coastal care that cultivate coastal livelihoods. CLIMAVORE began with a new public forum, shaped as a multispecies intertidal table, established in Skye in 2017 to envision environmentally regenerative and socially reparative forms of food production based on metabolic interactions between humans and depleted landscapes that benefit a plethora of species. CLIMAVORE’s site responsive methodology relies on a socially-engaged art practice, consisting of fieldwork, interviews, working groups, oral histories, performative meals, cooking and building apprenticeships, tidal gardening, material testing and public art installations. Ongoing collaboration with residents, scientists, and policymakers critically explores ways of living not only on but with the coast. This new holistic approach to coastal nourishment provides methodologies for ecological praxis as well as a platform for researchers and the general public to imagine an alternative ecological future: the tidal commons. (shrink)

The “happy fish” passage in the Zhuangzi 莊子 is often interpreted as endorsing some form of perspectivism which precludes objective claims of knowledge and displaces the significance of human perspectives. Relativism has gained particular currency in contemporary readings. However, this essay aims to show the limited explanatory power of such relativist positions, with focus on Chad Hansen’s “perspectival relativism” and Lea Cantor’s “species relativism.” I will also offer a new, “transitional contextualist” reading, which intends to demonstrate that Zhuangzi’s (...) utterance is grounded in his epistemic context and that Huizi’s 惠子 disputation arises from his changing of the epistemic context, from one with quotidian “low standards” to one with “high-standards” skeptical demands. I further argue that when “wandering” (you 遊) is understood as a freedom from one’s partial perspective, it becomes clear how Zhuangzi analogizes a parallel with the fish’s “wandering” through a continuity between his “world” and that of the fish. (shrink)

“Absence of evidence isn’t evidence of absence” is a slogan that is popular among scientists and nonscientists alike. This article assesses its truth by using a probabilistic tool, the Law of Likelihood. Qualitative questions (“Is E evidence about H ?”) and quantitative questions (“How much evidence does E provide about H ?”) are both considered. The article discusses the example of fossil intermediates. If finding a fossil that is phenotypically intermediate between two extant species provides evidence that those (...) class='Hi'>species have a common ancestor, does failing to find such a fossil constitute evidence that there was no common ancestor? Or should the failure merely be chalked up to the imperfection of the fossil record? The transitivity of the evidence relation in simple causal chains provides a broader context, which leads to discussion of the fine-tuning argument, the anthropic principle, and observation selection effects. (shrink)

Fish farming is one of the fastest growing sectors of agriculture, attracting considerable attention to the question of whether existing farming regulations and animal welfare laws are adequate to deal with the expanding role of fish in feeding humans. The role of fish as model organisms in scientific research is also expanding -- a majority of research biology departments now keep zebrafish for the purposes of genome biology, and they are used widely used for basic neuroscience research. (...) However, due to their diversity and distance from mammalian biology, fish pose difficult questions for the application of legal and ethical principles of animal welfare. This paper reviews the developing legal and scientific context in which such questions must be answered. (shrink)

In contemporary society, humans interact with nonhuman animals in a number of ways, many of which involve the captivity of the nonhuman animals involved. Nonhuman animals trained for sport (sled dogs, horses trained for dressage, etc.), nonhuman animals confined for human entertainment (zoos, aquariums, circuses, etc.), and companion animals are all held captive by the human beings who interact with them. However, the moral acceptability of these forms of captivity seems to vary widely; this variance isn’t only a function of (...) the conditions of the captivity itself, but the reasons, attitudes, and intentions of the captors. Martha Nussbaum’s conception of species-specific flourishing allows for what she calls ‘respectful paternalism’ in the case of nonhuman animals, and in this paper, we will explore (a) Nussbaum’s account of ‘respectful paternalism’ as an aspect of justice that governs our interactions with nonhuman animals, (b) what the ‘respectful’ aspect of that paternalism involves by examining what it means for a captor to limit the autonomy of a nonhuman animal respectfully and (c) implications for our interactions with nonhuman animals in sport and entertainment environments. (shrink)

In the present paper, we propose and analyze a harvested predator–prey model that incorporates the dynamics of tourists in the Djoudj National Park of Birds, Senegal. The model describes the impact of migration of waterbirds and seasonal fishing on the global coexistence of species in the site of the Djoudj. By the Mahwin continuation theorem of coincidence degree theory, we investigate the existence of a positive periodic solution. The global asymptotic stability is discussed by constructing a suitable Lyapunov functional. (...) Some computational results are also addressed. (shrink)

Regenerative medicine promises to greatly impact on human health by improving repair outcomes in a range of tissues and injury contexts. Successful therapies will rely on identifying both intrinsic and extrinsic biological circuits that control wound healing, proliferation, cell survival, and developmental cell fate. Animals such as the zebrafish and the salamander display powerful examples of near‐perfect regeneration and scar‐free healing in a range of injury contexts not attained in mammals. By studying regeneration in a range of highly regenerative (...) class='Hi'>species that maintain regenerative potential throughout life, many instructive and permissive factors have been identified that could assist in the development of regenerative therapies. This review highlights some of the recent observations in immune regulation, epigenetic regulation, stem cell mobilization, and regenerative signatures that have improved our understanding of the regenerative process. Potential opportunities in harnessing this knowledge for future translation into the clinic are discussed. (shrink)

At once feared and revered, sharks have captivated people since our earliest human encounters. Children and adults alike stand awed before aquarium shark tanks, fascinated by the giant teeth and unnerving eyes. And no swim in the ocean is undertaken without a slight shiver of anxiety about the very real—and very cinematic—dangers of shark bites. But our interactions with sharks are not entirely one-sided: the threats we pose to sharks through fisheries, organized hunts, and gill nets on coastlines are more (...) deadly and far-reaching than any bite. In Sharks and People acclaimed wildlife photographer Thomas Peschak presents stunning photographs that capture the relationship between people and sharks around the globe. A contributing photographer to National Geographic, Peschak is best known for his unusual photographs of sharks—his iconic image of a great white shark following a researcher in a small yellow kayak is one of the most recognizable shark photographs in the world. The other images gathered here are no less riveting, bringing us as close as possible to sharks in the wild. Alongside the photographs, Sharks and People tells the compelling story of the natural history of sharks. Sharks have roamed the oceans for more than four hundred million years, and in this time they have never stopped adapting to the ever-changing world—their unique cartilage skeletons and array of super-senses mark them as one of the most evolved groups of animals. Scientists have recently discovered that sharks play an important role in balancing the ocean, including maintaining the health of coral reefs. Yet, tens of millions of sharks are killed every year just to fill the demand for shark fin soup alone. Today more than sixty species of sharks, including hammerhead, mako, and oceanic white-tip sharks, are listed as vulnerable or in danger of extinction. The need to understand the significant part sharks play in the oceanic ecosystem has never been so urgent, and Peschak’s photographs bear witness to the thrilling strength and unique attraction of sharks. They are certain to enthrall and inspire. (shrink)

In the first monograph in this exciting area since then, William Fish develops a comprehensive disjunctive theory, incorporating detailed accounts of the three ...

Introduction: Three key principles -- Sense datum theories -- Adverbial theories -- Belief acquisition theories -- Intentional theories -- Disjunctive theories -- Perception and causation -- Perception and the sciences of the mind -- Perception and other sense modalities.

Environmental groups have worked tirelessly to save several species of endangered fish along the Colorado River, including the humpback chub (Gila cypha). The humpback chub does not seem to have any significant instrumental goods, but these environmentalists have championed its cause nonetheless. If the humpback chub has no instrumental goods, then appealing to another kind of goods is needed to show that it should be preserved. Some environmental ethicists have suggested appealing to the intrinsic goods of a (...) class='Hi'>species (or, alternatively, its intrinsic value or inherent value). Drawing on and going beyond John O’Neill’s work, it can be argued that all currently existing (biological) species have their own goods, or intrinsic goods. In terms of the notion of flourishing, the intrinsic goods of a species consist in its abilities to flourish. These goods can be used to construct a defense of the view that a species, even a species such as the humpback chub, ought to be preserved. One way to construct this defense is to appeal to virtue ethics, specifically the virtue of humility. Exercising the virtue of humility in our relations with species that we human beings have endangered involves preserving them along with preserving their intrinsic goods. (shrink)