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Full-Text Articles in Evolution

Sentient Animals Do Not Just Live In The Present, John Webster Jan 2019

Sentient Animals Do Not Just Live In The Present, John Webster

Animal Sentience

Sheep are particularly well-equipped with the cognitive and emotional skills appropriate to their phenotype and natural environment. These include spatial memory, the benefits of safety in numbers, and the ability to recognise special individuals in large flocks by sight and by sound. Marino & Merskin’s target article reviews convincing evidence on whether sheep are more or less clever than other mammalian species. Sheep are very good at being sheep. But sentient animals do not just live in the present. Their emotional state is not simply dictated by events of the moment. If they learn, they can cope; if not, they …


Positive Sentience Is Underrated, Teya Brooks Pribac Jan 2019

Positive Sentience Is Underrated, Teya Brooks Pribac

Animal Sentience

My commentary focuses on two aspects of ovine (well-)being considered in the review: the developmental context and (un)fulfilled potentialities.


Sheep In Aesop’S And Phaedrus’S Fables, Matteo Colombo, Chiara Raucea Jan 2019

Sheep In Aesop’S And Phaedrus’S Fables, Matteo Colombo, Chiara Raucea

Animal Sentience

Sheep feature in various animal fables. Marino & Merskin suggest that “we” view sheep as “docile, passive, unintelligent, and timid,” but animal fables do not support this view. In Aesop’s and Phaedrus’s fables, sheep are a primary target of injustice; but they are not passive targets. Sheep endure injustice actively and honestly. They are intelligent, aware and outspoken about their own condition.


Using Sheep Psychology To Guide Sheep Policy, Ralph Adolphs Jan 2019

Using Sheep Psychology To Guide Sheep Policy, Ralph Adolphs

Animal Sentience

Marino & Merskin’s valuable review of the literature on sheep cognition shows how entrenched common views of these animals’ mental lives are disputed by the research literature. Yet the evidence they muster faces three challenges that their target article does not discuss: (1) the behavioral tasks are strongly anthropocentric; (2) neuroscientific data are absent; and (3) applications are not discussed. I touch on all three of these here.


Why Are Sheep Sheepish? How Perception Affects Animal Stereotyping, Robert G. Franklin Jr. Jan 2019

Why Are Sheep Sheepish? How Perception Affects Animal Stereotyping, Robert G. Franklin Jr.

Animal Sentience

Marino & Merskin present compelling evidence that many stereotypes of sheep are incorrect. One factor that may play an important role in animal stereotyping is the physical appearance of animals, which can directly lead to stereotyping through automatic mental processes. Sheep have a round and babyish appearance that directly evokes judgments of warmth and docility. Depictions of sheep in art, and especially cartoons, reinforce this stereotype.


The Mental Lives Of Sheep And The Quest For A Psychological Taxonomy, Carrie Figdor Jan 2019

The Mental Lives Of Sheep And The Quest For A Psychological Taxonomy, Carrie Figdor

Animal Sentience

Research into nonhuman cognition has broadened and deepened in recent years. It supports and motivates a shift toward an ecological rather than an anthropocentric approach to cognition.


Debunking Human Prejudice And Blindness, Peter J. Li Jan 2019

Debunking Human Prejudice And Blindness, Peter J. Li

Animal Sentience

Human prejudice and blindness to animal suffering are shocking. Despite their differences in culture, politics, and religious beliefs, humans have one thing in common. They see nonhuman animals as inferior and have since time immemorial assumed a dominant position in an asymmetrical human-animal relationship. When it comes to human-animal relations, there is no “clash of civilizations.” Human prejudice and blindness are predicated on “common sense assumptions” about the natural world and nonhuman animals in particular. Marino & Merskin’s review is part of the growing effort to debunk the assumptions that have shaped human actions so as to end the injustice …


Sheep Complexity Outside The Laboratory, Cheryl Abbate Jan 2019

Sheep Complexity Outside The Laboratory, Cheryl Abbate

Animal Sentience

Marino & Merskin’s review shows that sheep are intelligent and highly social but their methodology has some shortcomings. I describe five problems with reviewing only the academic and scientific literature and suggest how one might provide an even more compelling case for the complexity of sheep minds.


Cognition, Emotion, Personality And The Conservation And Management Of Wild Ungulates, Rob Found Jan 2019

Cognition, Emotion, Personality And The Conservation And Management Of Wild Ungulates, Rob Found

Animal Sentience

Increasing public understanding of the complexity of wild ungulates can improve animal welfare and advance global conservation efforts of these keystone species. Unfortunately, shaping public opinion on wild species is challenging because personal experience with wildlife is declining, popular education is still biased towards the predator instead of the prey, and scientific research is more difficult to conduct on wild ungulates compared to those on farms, in zoos, or otherwise in captivity. Nevertheless, studies of cognition, individuality, and intelligence of wild ungulates are increasing. I briefly highlight some major results from my own work on complexity in wild elk, illustrating …


What Every Shepherd Knows, Marthe Kiley-Worthington Jan 2019

What Every Shepherd Knows, Marthe Kiley-Worthington

Animal Sentience

The findings of the research reviewed by Marino & Merskin have been common knowledge to shepherds for millennia. Many of them are also evolutionary necessities for all mammals, especially social ones.


The Intelligence Of Sheep, David Gamez Jan 2019

The Intelligence Of Sheep, David Gamez

Animal Sentience

This commentary suggests how recent theories about the predictive brain could help us understand the evidence put forward by Marino & Merskin for intelligence in sheep. I contrast predictive intelligence in sheep with automatic behaviors that do not require intelligence, and I consider the flexibility of sheep intelligence.


Time To Vary The Formula, Jon Mallatt Jan 2019

Time To Vary The Formula, Jon Mallatt

Animal Sentience

In the past few years, Marino and her colleagues have written a series of comprehensive and helpful review articles on the cognitive, emotional, and social complexity of pigs, chickens, cows, and most recently, sheep. These articles are similarly structured, even formulaic, which has benefits but also limitations. Here, I point out the limitations in order to suggest new directions and contributions for the authors in the future.


The Importance Of Research Applicability, Krista Mclennan Jan 2019

The Importance Of Research Applicability, Krista Mclennan

Animal Sentience

Marino & Merskin’s (2019) review contains key information about the complexity of sheep and their intelligence level, but lacks practical application. The key to making any long-term changes to sheep welfare at an industry level is by generating research that is practically relevant to the sector. The practical application of research should be considered at the design stage and in consultation with producers. Additionally, thought needs to be given to how the practical application of the research will be transferred to those people directly involved in animal care (e.g., producers, stockpersons, etc.). Focusing on the practical relevance and application of …


Domestication And Cognitive Complexity, David R. Brodbeck, Madeleine I. R. Brodbeck, Keeghan Rosso Jan 2019

Domestication And Cognitive Complexity, David R. Brodbeck, Madeleine I. R. Brodbeck, Keeghan Rosso

Animal Sentience

Marino and Merskin (2019) list a number of tasks that sheep can perform well. As comparative psychologists, we are not surprised by these results. Indeed, many domesticated animal species show similar abilities.


Adding Sheep To The Spectrum Of Comparative Psychology, James King Jan 2019

Adding Sheep To The Spectrum Of Comparative Psychology, James King

Animal Sentience

Marino & Merskin’s comprehensive review of cognitive complexity in sheep is a laudable and important contribution to comparative psychology. It is also valuable because it shows promising directions for future research on this neglected species. The relatively small number of neurons in the bovid cerebral cortex indicates that sheep cognitive performance on traditional measures of complex learning is limited. Nevertheless, the social and emotional complexity of sheep underscores the importance of further research into domains including personality and psychological well-being.


Can A Mirror Capture The Self?, Cynthia Willett Jan 2019

Can A Mirror Capture The Self?, Cynthia Willett

Animal Sentience

Is the mirror a reliable indicator of self-awareness for any species, whether sheep or human? Taking a cue from feminist, phenomenological, and cross-cultural philosophy, a relational self rather than a reflective one might better capture what is at stake for the lives of social animals and for science.


Cognitive Dissonance About Sheep Cognition And Consumption, Catia Correia Caeiro Jan 2019

Cognitive Dissonance About Sheep Cognition And Consumption, Catia Correia Caeiro

Animal Sentience

Sheep are perceived as mere resources under the massive demand of the food and wool industry. Evidence that sheep cognition is comparable to that of other species may inspire reflection on sheep consumption. Dogs may be a promising comparison species.


Social Cognition In Sheep: Welfare Implications, Keith M. Kendrick Jan 2019

Social Cognition In Sheep: Welfare Implications, Keith M. Kendrick

Animal Sentience

More research has been carried out on social cognition in sheep than in other farm animal species. Although this has often been featured widely in the media, there is still limited public awareness of it. Marino & Merskin’s review is therefore both important and timely. In my commentary, I focus primarily on what has been established about the complexity of sheep social cognition, at the level of both brain and behavior, and on some of these findings for sheep welfare.


What Is In An Octopus's Mind?, Jennifer Mather Jan 2019

What Is In An Octopus's Mind?, Jennifer Mather

Animal Sentience

It is difficult to imagine what an animal as different from us as the octopus ‘thinks’, but we can make some progress. In the Umwelt or perceptual world of an octopus, what the lateralized monocular eyes perceive is not color but the plane of polarization of light. Information is processed by a bilateral brain but manipulation is done by a radially symmetrical set of eight arms. Octopuses do not self-monitor by vision. Their skin pattern system, used for excellent camouflage, is open loop. The output of the motor system of the eight arms is organized at several levels — brain, …


Octopus Umwelt Or Umwelten?, Luis H. Favela Jan 2019

Octopus Umwelt Or Umwelten?, Luis H. Favela

Animal Sentience

Even if its intelligent behaviors are the product of decentralized control systems, Mather argues that the octopus has an “Umwelt,” and, thus, a mind. I argue that Umwelt does not provide a conceptual basis for understanding the octopus as having a mind. First, Umwelt does not refer only to an organism’s perceptual abilities. Second, in providing evidence for decentralized control systems that underlie intelligent behaviors, Mather makes a case against an octopus Umwelt. Instead, the octopus is more akin to a collection of systems, or Umwelten, than a single system with an Umwelt.


Who Needs A Mind When You Have Thousands Of Fingers?, Yoram Gutfreund Jan 2019

Who Needs A Mind When You Have Thousands Of Fingers?, Yoram Gutfreund

Animal Sentience

Mather’s target article aligns with a common tendency of granting the octopus a mind or consciousness. But what is the meaning of an octopus’s mind? Is it part of nature or is it observer-dependent, imputed to satisfy our own psychological needs? In this commentary, I build on my own experience with octopuses to challenge the notion that we can conclusively attribute a mind to an animal; and I question the scientific usefulness of doing so.


A Community Of Minds, Bennett L. Schwartz Jan 2019

A Community Of Minds, Bennett L. Schwartz

Animal Sentience

Mather (2019) provides an excellent overview of the literature on octopus perception, cognition, memory, and behavior. Anyone interested in cephalopod cognition and brain organization will find her target article informative and interesting. In this commentary, I challenge the idea that an individual organism must have an individual mind. Given the structure of the octopus brain and their complex behavior, one must consider the possibility that an octopus is a community of minds rather than a single mind.


The Ingenuity Of Cephalopods, Angel Guerra Jan 2019

The Ingenuity Of Cephalopods, Angel Guerra

Animal Sentience

I present a brief overview of the richness of cephalopod behavioral, neural and cognitive traits.


What Is Good For An Octopus?, Heather Browning Jan 2019

What Is Good For An Octopus?, Heather Browning

Animal Sentience

Mather (2019) has brought together the current empirical research in support of the claim that octopuses possess minds; and the weight of the evidence does appear to support octopus sentience. Being sentient means an organism has welfare concerns, a subjective experience of life that can go well or poorly. Protecting welfare requires knowing what conditions will have a positive or negative impact. Understanding what is in the mind of an octopus will give us valuable insight into what is good for an octopus.


The Octopus: A Beautiful (But Disorganized) “Mind”, Jon Mallatt Jan 2019

The Octopus: A Beautiful (But Disorganized) “Mind”, Jon Mallatt

Animal Sentience

Mather (2019) presents convincing evidence that octopuses have minds, but in the first 85% of the target article, the evidence does not come through very clearly because it is hidden by other information and by problems with the paper’s organization. I propose ways to build a tighter argument in the author’s Response to the Commentaries.


The ‘Thing’ From This World, Sergio M. Pellis Jan 2019

The ‘Thing’ From This World, Sergio M. Pellis

Animal Sentience

Science progresses by making contrasts, and the living world is a gold mine of contrasts. Often disciplines become victims by focusing on too narrow a slice of that diversity, leading to a myopic view of how nature works. The relationships between the brain and behavior have been intensively studied in vertebrates, especially mammals, and we have become complacent in our assumptions about how behavior is constructed. As the target article by Mather (2019) shows, the relationship between the brain and behavior in octopuses forces us to reevaluate some of those assumptions.


Are Octopuses Special? Mind, Sociality And Life History, Phyllis C. Lee Jan 2019

Are Octopuses Special? Mind, Sociality And Life History, Phyllis C. Lee

Animal Sentience

Understanding the Umwelt or being-ness of an octopus is a fascinating problem. Mather’s review provides us with significant insights into the ways of living of non-humans that exploit a perceptual and physical world we can only guess at. Octopus “distributed minds” call into question our primate-based understandings of the importance of sociality and the pace of life in the evolution of complex perceptual and behavioural abilities.


Are Our Ideas About Octopus Life Too Anthropomorphic To Help?, Kenneth J. Aitken Jan 2019

Are Our Ideas About Octopus Life Too Anthropomorphic To Help?, Kenneth J. Aitken

Animal Sentience

Our understanding of the evolution and ontogeny of the octopus and its behavioral repertoire in its natural habitat remains rudimentary at best. There are many parallels, but also just as many differences from our models of human biology and ontogeny, making anthropocentric generalizations of limited use in explanation.


A Behavior-Analytic Approach To Understanding Octopus “Mind”, Lindsay R. Mehrkam Jan 2019

A Behavior-Analytic Approach To Understanding Octopus “Mind”, Lindsay R. Mehrkam

Animal Sentience

Mather makes a convincing case for octopus sentience based on a lot of evidence of their complex learning capabilities. It should follow from Mather’s findings that these intelligent invertebrates are worthy of welfare considerations, just as vertebrate species with similar capabilities are. I provide a complementary environment-behavior analysis of how we might understand the world of the octopus more straightforwardly, borrowing from Mather’s examples, to show how to promote opportunities for complex learning and species-typical behaviors in the octopus.


Cephalopod Molluscs, Causal Models, And Curious Minds, Andrew W. Corcoran Jan 2019

Cephalopod Molluscs, Causal Models, And Curious Minds, Andrew W. Corcoran

Animal Sentience

Mather (2019) presents a compelling case in favour of octopus mind. Surveying an impressive array of empirical literature, she identifies the creature’s playful, inquisitive behaviour as emblematic of a distinctively mental form of agency. I offer an alternative perspective in which curiosity and play are construed as constitutive processes in the emergence of the (predictive) mind.