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Articles 211 - 240 of 822

Full-Text Articles in Ecology and Evolutionary Biology

Octopus Intelligence: The Importance Of Being Agnostic, Piero Amodio Jan 2019

Octopus Intelligence: The Importance Of Being Agnostic, Piero Amodio

Animal Sentience

Mather’s (2019) provocative claim that octopuses have a mind hinges on the inference that their striking behavioural flexibility is evidence of “complex” cognitive abilities. I discuss alternative explanations — not to deny the possibility of complexity but to point out that current evidence does not allow us to draw firm conclusions. Only an agnostic approach will lead to the systematic investigation of octopus behaviour and ultimately, greater insights into the cognitive capacities of these fascinating creatures.


Keeping Hold Of Nurse, Andrew Packard Jan 2019

Keeping Hold Of Nurse, Andrew Packard

Animal Sentience

Mather draws from a lifetime devoted to studying individual octopuses in the wild and in aquaria to combine a natural history account of their actions with an argument from design adopted from second-, often third-hand sources. The 'distributed' [decentralised] nervous system said to contrast with that of vertebrates – a premise largely accepted by Mather’s commentators so far – does not reflect the original literature on motor control, nor the facts of comparative anatomy, functional morphology and morphogenesis. Ontogeny is absent. With the help of some old or little-known illustrations from my own participant-observer experimental investigations, I will try here …


What We Don't Know About Cephalopods And How To Define It, Catia Correia Caeiro Jan 2019

What We Don't Know About Cephalopods And How To Define It, Catia Correia Caeiro

Animal Sentience

Despite the reputation of octopuses as intelligent animals, their cognitive abilities seem to be mostly unknown. This should be the starting point of a long process of scientific enquiry about these taxa, which must include discussions on operational definitions first and foremost. Discussing octopus mind might prove fruitless without more basic concepts. Some approaches are suggested here.


Octopus: Multiple Minds Or Just A Slow Thinker?, Shelley A. Adamo Jan 2019

Octopus: Multiple Minds Or Just A Slow Thinker?, Shelley A. Adamo

Animal Sentience

An octopus has more neurons in their peripheral nervous system (PNS) than in their brain. PNS neurons could participate in forming cognitive networks with the central brain in the same way that the cerebellum is now thought to contribute to mammalian cognition. However, cephalopods lack myelinated fibres, which might decrease the ability of the PNS to participate in cognitive networks. The lack of myelinated fibres may also select for a less integrated brain, with an increased emphasis on local information processing. Alternatively, integration may still occur across distant neural centers, but proceed more slowly in cephalopods than in mammals.


Octopus Sentience: Three Criteria, Alix Noël-Guéry Jan 2019

Octopus Sentience: Three Criteria, Alix Noël-Guéry

Animal Sentience

The first question to ask is whether octopuses are sentient, so that, if so, they can be protected. Three consensual criteria to evaluate animal sentience can be applied to the octopus. Octopuses meet all three of them.


What And Where Is An Octopus’S Mind?, Jennifer A. Mather Jan 2019

What And Where Is An Octopus’S Mind?, Jennifer A. Mather

Animal Sentience

It is gratifying to see the thorough discussion of whether octopuses have a mind, though perhaps a mind that is different from those of “higher” vertebrates. It stimulates us to look at the welfare of these animals and challenges us to find better ways to test mindfulness and cognition across animals with widely differing natural histories and sensory and motor capacities.


Just Preservation, Adrian Treves, Francisco J. Santiago-Ávila, William S. Lynn Jan 2019

Just Preservation, Adrian Treves, Francisco J. Santiago-Ávila, William S. Lynn

Animal Sentience

We are failing to protect the biosphere. Novel views of conservation, preservation, and sustainability are surfacing in the wake of consensus about our failures to prevent extinction or slow climate change. We argue that the interests and well-being of non-humans, youth, and future generations of both human and non-human beings (futurity) have too long been ignored in consensus-based, anthropocentric conservation. Consensus-based stakeholder-driven processes disadvantage those absent or without a voice and allow current adult humans and narrow, exploitative interests to dominate decisions about the use of nature over its preservation for futurity of all life. We propose that authentically non-anthropocentric …


Justice For Nature, Haydn Washington Jan 2019

Justice For Nature, Haydn Washington

Animal Sentience

Eight points are made in this commentary: (1) Ecocentrism is the preferable term. (2) Indigenous societies have long used a kinship ethics. (3) Earth jurisprudence and ecodemocracy should be considered. (4) Assumptions can be better defined. (5) Ethical pluralism is open to question. (6) The ethics of individuals vs. ecosystems needs further discussion. (7) Including justice for nature within social justice may be a serious mistake. (8) Trustees need to be ethically sophisticated.


Futurity, Selves And Further Organisms, Robin Attfield Jan 2019

Futurity, Selves And Further Organisms, Robin Attfield

Animal Sentience

Most aspects of Treves et al.’s target article are commendable, but I would suggest: explicitly including (1) Singer’s ‘equal interests’ principle; adjusting (2) Mathews’s principle of ‘bioproportionality’; and clarifying the implications of (3) Parfit’s Non-Identity Problem, (4) the limits of present predictions of future needs, and (5) the application of the concept of selves to biotic individuals. There is also a problem about (6) how plants are to be individuated.


Just Policy Paralysis?, Clare Palmer, Bob Fischer Jan 2019

Just Policy Paralysis?, Clare Palmer, Bob Fischer

Animal Sentience

Treves et al. (2019) argue that policy making should include the interests and well-being of present and future generations of humans and nonhumans. There are deep and abiding conflicts of interest both between and within these groups. Trying to factor in so many considerations is likely to generate political gridlock. The authors need to explain how to avoid this.


Granting Political Representation To Non-Humans, Joe Gray Jan 2019

Granting Political Representation To Non-Humans, Joe Gray

Animal Sentience

This commentary discusses the representation of individuals versus populations — human and nonhuman, present and future — in Treves et al.’s proposed trusteeship for futurity. Terminological questions are also discussed.


Reconciling Just Preservation, Shelley M. Alexander Jan 2019

Reconciling Just Preservation, Shelley M. Alexander

Animal Sentience

Treves et al.’s target article can play an important role in reconciling the needs of future generations and non-human animals in conservation. Human capacities are adequate for interpreting and defining many non-human animal needs. Worldviews are more complex, however, and conservation science, like the target article itself, suffers from a lack of diversity and inclusiveness. This may pose practical impediments to realizing just preservation.


To Preserve Or To Conserve?, Liv Baker Jan 2019

To Preserve Or To Conserve?, Liv Baker

Animal Sentience

Treves et al. propose the notion of trusteeship to help meet our responsibility to nature and individual animals, their homes, cultures, and societies. This proposal is grounded in a real-world framework that reveals how conservation has become distorted by anthropocentrism, human exceptionalism, and ethical hypocrisy.


Just Reductionism: In Defense Of Holistic Conservation, Bradley J. Bergstrom Jan 2019

Just Reductionism: In Defense Of Holistic Conservation, Bradley J. Bergstrom

Animal Sentience

Treves et al. (2019) argue that individual organisms should be protected by the courts. This already happens in many countries for rare and endangered species and for symbolically important species (e.g., raptors, songbirds, and bats in the U.S.), and through the international treaty for whales. But protection of these individuals stems from a focus on preserving their populations, whereas hunting of individuals is still a culturally accepted practice. Killing of individuals should be limited to valid reasons (e.g., eating the meat) and covered by fair-chase and humane-killing laws (which is not always the case). But “futurity” will not inherit present-day …


Just Preservation And The Half-Earth View, Helen Kopnina Jan 2019

Just Preservation And The Half-Earth View, Helen Kopnina

Animal Sentience

For interspecies justice, animal welfare, and animal rights, the planet needs to be divided on the basis of species' natural resource requirements. The Half-Earth View is that to maintain viable populations of the Earth's remaining species, half of landscapes and seascapes need protection from intensive economic activity. This protection is needed outside the nature preserve system, such as in agricultural areas or cities, so nature can co-exist with local communities.


Protecting Patients Who Lack A Voice, Rainer Spiegel Jan 2019

Protecting Patients Who Lack A Voice, Rainer Spiegel

Animal Sentience

Neither human young today nor future human generations nor non-human species have a voice in protecting the biosphere. Treves et al. propose courts and trustees for defending their interests. I describe an analogy with attempts to represent the interests of children and comatose patients in medicine.


Human Interests, Helen Tiffin Jan 2019

Human Interests, Helen Tiffin

Animal Sentience

Treves et al.’s proposal is welcome, but it will have to face at least four challenges: the interconnectedness of the human and the nonhuman portions of the biosphere, conflicts of interest, human overpopulation, and capitalism itself.


The Intrinsic Value Of Nature, Joanna E. Lambert Jan 2019

The Intrinsic Value Of Nature, Joanna E. Lambert

Animal Sentience

Treves et al. explain the need to preserve the rights of nonhuman species, human youth, and future generations. Although conservation biology has claimed to have an intrinsic valuation ethic since its inception in the 1980s, many aspects of the field have taken a decidedly anthropocentric and instrumentalist trajectory. This has important consequences for conservation-related policy and practice at all scales: local, regional, and global.


Developmental Aspects Of Capacities, Karen Bartsch Jan 2019

Developmental Aspects Of Capacities, Karen Bartsch

Animal Sentience

Chapman & Huffman suggest that judgments of human superiority underlie our cruelty to animals. It might be useful to examine how such judgments operate within the human community. Children arguably have a potential for developing “superior” capacities but are outperformed on many tasks by animals. There is a continuum of development in children’s capacities. Perhaps there are interspecies evolutionary continua too. This highlights the complexity of reasoning about humans, animals, and moral inclusion.


Sentience Is The Foundation Of Animal Rights, Michael L. Woodruff Jan 2019

Sentience Is The Foundation Of Animal Rights, Michael L. Woodruff

Animal Sentience

Chapman & Huffman argue that the cognitive differences between humans and nonhuman animals do not make humans superior to animals. I suggest that humans have domain-general cognitive abilities that make them superior in causing uniquely complex changes in the world not caused by any other species. The ability to conceive of and articulate a claim of rights is an example. However, possession of superior cognitive ability does not entitle humans to superior moral status. It is sentience, not cognitive complexity, that is the basis for the assignment of rights and the protections under the law that accompany them.


Humans: Uniquely Responsible For Causing Conservation Problems, Uniquely Capable Of Solving Them, Michael L. Wilson, Clarence L. Lehman Jan 2019

Humans: Uniquely Responsible For Causing Conservation Problems, Uniquely Capable Of Solving Them, Michael L. Wilson, Clarence L. Lehman

Animal Sentience

We share Chapman & Huffman’s views on the importance of promoting animal welfare and conservation. We disagree with their implication, however, that reverence for life and concern for the wellbeing of global ecosystems depend on a belief that other living things are similar to humans in any of their capacities. Humans exhibit special traits — language, cumulative culture, extraordinary capacity for cooperation when we are at our best, and ever-advancing technological developments — that enabled them to dominate the planet, resulting in the current conservation crisis. It is precisely the fact that humans have become unique that provides hope for …


More Evidence Of Complex Cognition In Nonhuman Species, Lesley J. Rogers Jan 2019

More Evidence Of Complex Cognition In Nonhuman Species, Lesley J. Rogers

Animal Sentience

Chapman & Huffman have highlighted observations of animals performing, in nature, complex behaviour once thought to be unique to humans. Just as relevant to their argument are examples of cognition shown by domesticated species tested in controlled conditions. These strengthen the case for human/nonhuman similarities in behaviour and cognition. Recent research has brought to our attention the ability of nonhuman species to perform many tasks previously considered to be the hallmark of humans. Even though different species may use different ways of solving these tasks, the very fact that they can do it undermines the notion of human superiority.


Unique In Degree Not Kindness, Jennifer Vonk Jan 2019

Unique In Degree Not Kindness, Jennifer Vonk

Animal Sentience

Humans are certainly unique among living species. This is evident in the transformation of human environments and its resulting impact on other animals. However, many of the traits unique to humans are costly as well as adaptive and should certainly not be used to elevate their status above that of other species.


Animal Sentience Is Not Enough To Motivate Conservation, Irene M. Pepperberg Jan 2019

Animal Sentience Is Not Enough To Motivate Conservation, Irene M. Pepperberg

Animal Sentience

Chapman & Huffman suggest that humans’ views of their own superiority are a source of their callousness toward the environment. I do not disagree but point to a number of other issues that must be addressed for conservation efforts to succeed.


Non-Human Animals Providing Rescue In Medical Emergencies, Rainer Spiegel Jan 2019

Non-Human Animals Providing Rescue In Medical Emergencies, Rainer Spiegel

Animal Sentience

In their target article, Chapman & Huffman challenge the quotation of Sir William Osler that the desire to take medication distinguishes humans from non-human animals. They provide examples of self-medication in non-human animals. Based on these examples, it can be inferred that non-human animals practice at least some form of medicine for symptom control. I would like to extend this view by showing that non-human animals not only provide self-medication, but also rescue others facing emergencies.


Mirror Neurons And Humanity’S Dark Side, Gisela Kaplan Jan 2019

Mirror Neurons And Humanity’S Dark Side, Gisela Kaplan

Animal Sentience

The last two decades have revealed brain mechanisms in birds and primates showing that, contrary to earlier prejudices, some birds can do things (cognitive and affective) on par with or even better than great apes and humans. The old dichotomies are breaking down; but the dark side is that these insights come at a time in the Anthropocene when humans have caused and continue to cause mass extinctions.


Humans May Be Unique And Superior — And That Is Irrelevant, Eze Paez Jan 2019

Humans May Be Unique And Superior — And That Is Irrelevant, Eze Paez

Animal Sentience

Chapman & Huffman argue that, because humans are neither unique nor superior to the other animals, cruelty to animals is not justified. Though I agree with their conclusion, I do not think their argument works. Many human beings do have some capacities that animals do not have and are greater in some respects, in the sense of having superior abilities. It is a better argument to deny that any of that is morally relevant. Sentience suffices for moral consideration, and for deriving a moral duty not to harm other animals and to assist them when they are in need.


Humans Have Always Been Unique!, William C. Mcgrew Jan 2019

Humans Have Always Been Unique!, William C. Mcgrew

Animal Sentience

Arguments about human uniqueness apply not only to extant species but also to extinct ones, that is, the hominin predecessors of anatomically modern Homo sapiens. Thus, unique and superior are doubly relative terms, in past and present. The scope for empirical comparison faces a spectrum of difficulty, from material (e.g., artefacts) to non-material (e.g., concepts) phenomena.


Phooey On Comparisons, Gwen J. Broude Jan 2019

Phooey On Comparisons, Gwen J. Broude

Animal Sentience

Chapman & Huffman reject the notion that human beings are very different from other animals. The goal is to undermine the claim that human uniqueness and even superiority are reason enough to treat other animals badly. But evaluating human uniqueness for this purpose only plays into the hands of those who exploit invidious comparisons between us and other animals to justify mistreatment of the rest of the animal kingdom. What human uniqueness we may discover would still be no justification for how we behave toward other animals. We should also ask ourselves whether any human-centric criterion can be justification for …


Anthropomorphism Is The First Step, Marthe Kiley-Worthington Jan 2019

Anthropomorphism Is The First Step, Marthe Kiley-Worthington

Animal Sentience

Individuals have intentions, beliefs and choices. This sense of “personhood” has been known and used for centuries by those who have dealt professionally with any nonhuman mammal. All mammals have a lot in common physically and mentally. The first step toward understand another species’ point of view is anthropomorphism.