Animal Studies Commons^™

K-Means Clustering With Multiresolution Peak Detection, Guanshan Yu, Leen-Kiat Soh, Alan B. Bond

Avian Cognition Papers

Clustering is a practical data mining approach of pattern detection. Because of the sensitivity of initial conditions, k-means clustering often suffers from low clustering performance. We present a procedure to refine initial conditions of k-means clustering by analyzing density distributions of a data set before estimating the number of clusters k necessary for the data set, as well as the positions of the initial centroids of the clusters. We demonstrate that this approach indeed improves the accuracy and performance of k-means clustering measured by average intra to interclustering error ratio. This method is applied to the virtual ecology project to …

Big Brains Do Matter In New Environments, Lori Marino

Evolutionary Biology Collection

No abstract provided.

Carbon Dioxide For Euthanasia: Concerns Regarding Pain And Distress, With Special Reference To Mice And Rats, Kathleen Conlee, Martin Stephens, Andrew N. Rowan, Lesley A. King

Laboratory Experiments Collection

Carbon dioxide (CO₂) is the most commonly used agent for euthanasia of laboratory rodents, used on an estimated tens of millions of laboratory rodents per year worldwide, yet there is a growing body of evidence indicating that exposure to CO₂ causes more than momentary pain and distress in these and other animals. We reviewed the available literature on the use of CO₂ for euthanasia (as well as anaesthesia) and also informally canvassed laboratory animal personnel for their opinions regarding this topic. Our review addresses key issues such as CO₂ flow rate and final concentration, presence …

Reasonable Partiality And Animal Ethics, Bernard E. Rollin

Attitudes Towards Animals Collection

Moral psychology is often ignored in ethical theory, making applied ethics difficult to achieve in practice. This is particularly true in the new field of animal ethics. One key feature of moral psychology is recognition of the moral primacy of those with whom we enjoy relationships of love and friendship -philia in Aristotle's term. Although a radically new ethic for animal treatment is emerging in society, its full expression is severely limited by our exploitative uses of animals. At this historical moment, only the animals with whom we enjoy philia - companion animals - can be treated with unrestricted moral …

Facts From Faeces: Prey Remains In Wolf, Canis Lupus, Faeces Revise Occurrence Records For Mammals Of British Columbia’S Coastal Archipelago, Michael H. H. Price, Chris T. Darimont, Neville N. Winchester, Paul C. Paquet

Biogeography and Ecological Opportunity Collection

Archipelagos often harbour taxa that are endemic and vulnerable to disturbance. Conservation planning and research for these areas depend fundamentally on accurate and current taxonomic inventories. Although basic ecological information is in its infancy, the temperate rainforest islands of coastal British Columbia are undergoing rapid human-caused modification, particularly logging. We report herein new mammal records for these islands as determined by prey remains in the faeces of Wolves (Canis lupus), the area’s apex mammalian terrestrial predator. Of particular interest is our detection of Marten (Martes americana) on islands previously inventoried and island occupancy by Moose (Alces alces), which have apparently …

Effects Of Predation Pressure On The Cognitive Ability Of The Poeciliid Brachyraphis Episcopi, Culum Brown, Victoria A. Braithwaite

Sentience Collection

Variable levels of predation pressure are known to have significant impacts on the evolutionary ecology of different populations and can affect life-history traits, behavior, and morphology. To date, no studies have directly investigated the impact of predation pressure on cognitive ability. Here we use a system of replicate rivers, each with sites of high- and low-predation pressure, to investigate how this ecological variable affects learning ability in a tropical poeciliid, Brachyraphis episcopi. We used a spatial task to assess the cognitive ability of eight populations from four independent streams (four high- and four low- predation populations). The fish were required …

Impact Of The Agricultural Sector On The Arkansas Economy In 2001, Jennie Popp, Gina Vickery, H. L. Goodwin Jr., Wayne Miller

AAES Research Reports and Research Bulletins

Agriculture has historically been one of Arkansas’ primary economic sectors. Agriculture is defined as the sum of agricultural production and processing activities unless otherwise specified. Agriculture contributes to the economy through direct agricultural production and value-added processing which generates economic activity in other parts of the economy.

Chimpanzees In Research: Past, Present, And Future, Kathleen Conlee, Sarah T. Boysen

State of the Animals 2005

Although the welfare of chimpanzees encompasses many issues, this chapter addresses their use in research, including their historical and current use in the United States, ethical and scientific concerns, public opinion, international legislation, and future directions.

Cruelty Toward Cats: Changing Perspectives, Randall Lockwood

State of the Animals 2005

Of all the species that have been domesticated, cats have historically been subjected to the widest diversity of treatment by humans. They have been worshipped as gods and reviled as devils, coddled and pampered, but also abandoned and abused. Our treatment of cats has likewise created a range of problems for professionals concerned with their care—from dealing with problems of obesity and overindulgence to tending to the needs of animals who have been neglected, intentionally harmed, or even tortured.

Tracking The “State Of The Animals”: Challenges And Opportunities In Assessing Change, Randall Lockwood

State of the Animals 2005

In this chapter we:

1. Review some of the measures that have been used in the past to attempt to assess the state of the animals and the extent to which we can continue to apply these measures to track future changes.
2. Review some of the emerging tools and developing technologies that can improve our tracking of the state of the animals and provide some quantitative measures of our progress.
3. Explore some examples of general measures of human interaction with animals that might prove useful in predicting and tracking changes in how they are treated.

Indoor Cats, Scratching, And The Debate Over Declawing: When Normal Pet Behavior Becomes A Problem, Katherine C. (Kasey) Grier, Nancy Peterson

State of the Animals 2005

When pet animals share our living spaces, their needs and natural behaviors sometimes are at odds with the varying standards for household appearance, sanitation, and polite social life that Americans have established over time. How pet owners have resolved these issues provides insight into their changing ideas about the role of animals in their households and suggests how much, or how little, people may actually know about the biological behaviors and psychological needs of the creatures they care for. This essay examines one particular issue associated with the problem of sharing spaces: declawing pet cats as a common solution to …

Dogs And Dog Control In Developing Countries, J. F. Reese

State of the Animals 2005

The relationship between a community and its dogs is not always entirely positive, and many cultures identify similar problems associated with having dogs in their midst. For example, in South Africa, the Soweto community identified the problems caused by dogs as road accidents, barking and fighting, biting children and killing livestock, and uncontrolled fecal contamination (Beck 2000). Such problems exist in many cultures, throughout the developed and developing worlds.

It is against this background of a wide range of man-dog relationships that dogs in the developing world must be seen and understood. Knowledge about and understanding of the complexity of …

Progress In Animal Legislation: Measurement And Assessment, Andrew N. Rowan, Beth Rosen

State of the Animals 2005

As the animal movement has gained more political authority and public acceptance, it needs better ways to assess and follow its progress—or lack thereof—towards its goals. In this era, in which nonprofits and funding agencies are demanding better measures of effectiveness, the animal movement needs to examine how it looks at the progress it is (or is not) making in gaining better legal protection for animals.

International Animal Law, With A Concentration On Latin America, Asia, And Africa, Neil Trent, Stephanie Edwards, Jennifer Felt, Kelly O'Meara

State of the Animals 2005

The status of domestic animal protection laws in Asia, Africa, and Latin America varies, as one might imagine, from country to country. Countries with high per capita incomes are more likely to have a large number of animal protection organizations, whose existence normally leads to the passage of protective legislation.1 The sociopolitical, cultural, and religious backgrounds of each country, as well as previous colonization, also influence whether it has animal protection legislation and whether these laws are enforced. Previous colonization is the case in many former British colonies, which often have very good laws but neither the means nor the …

Feral Cats: An Overview, Margaret R. Slater, Stephanie Shain

State of the Animals 2005

Humans and cats have a long and complex history together. Since the nineteenth century, contradictory ideas about the need to protect and care for cats have moved us toward a shift in ideas, values, and behaviors to a more benign perception of cats than was generally the case in previous centuries. In some quarters, but not all, even feral cats have begun to be seen as worthy of our study and humane treatment. In many countries, the welfare of all cats has become a focus of public concern, but nowhere is the shift in values reflected more than in the …

Competition Between Marine Mammals And Fisheries: Food For Thought, Kristin Kaschner, Daniel Pauly

State of the Animals 2005

Marine mammals and humans have co-existed on this planet for several hundred thousand years. Both rely heavily on the exploitation of marine resources, though whales, dolphins, and pinnipeds have been doing so for much longer, roaming the oceans for millions of years, long before the emergence of modern humans (Hoelzel 2002). It is not surprising that, when there is a “new kid on the block,” co-existence is not always very peaceful, and many of the encounters between humans and marine mammals result in a variety of conflicts.

127 Million Non-Human Vertebrates Used Worldwide For Scientific Purposes In 2005, Andrew Knight

Experimentation Collection

No abstract provided.

Non-Human Primates In Medical Research And Drug Development: A Critical Review, Jarrod Bailey

Laboratory Experiments Collection

There is much current debate surrounding the use of non-human primates (NHPs) in medical research and drug development. This review, stimulated by calls for evidence from UK-based inquiries into NHP research, takes a critical view in order to provide some important balance against papers supporting NHP research and calling for it to be expanded. We show that there is a paucity of evidence to demonstrate the positive contribution or successful translation of NHP research to human medicine, that there is a great deal of often overlooked data showing NHP research to be irrelevant, unnecessary, even hazardous to human health and …

The State Of The Animals Iii: 2005, Deborah J. Salem, Andrew N. Rowan

In this third, all new, volume in the State of the Animals series, scholars and experts in animal protection examine the challenges facing companion animals, marine mammals, and nonhuman primates and review legal protection for animals here and abroad.

The Effects Of Land Transport On Animal Welfare, D. M. Broom

Transport of Farm Animals Collection

Animal welfare during and as a result of transport can be assessed by using a range of behavioural, physiological, pathological and carcass-quality indicators that are described in this paper. Measures of the extent of any disease, injury or mortality resulting from, or exacerbated by, transport are important because health is an important part of welfare. Many of the indicators are measures of stress as they involve long-term adverse effects on the individual. Factors affecting the welfare of animals before, during and after transport which are discussed are: definition of the responsibilities and competence, attitudes to animals and need for training …

Level And Source Of Supplemental Selenium For Beef Steers, Scott Fry, Elizabeth B. Kegley, M. Ellen Davis, Michael D. Ratcliff, Douglas L. Galloway, Ron A. Dvorak

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Selenium (Se) is deficient in many Arkansas soils; therefore, an experiment was conducted on steers to evaluate the effects of two supplemental Se sources on performance, blood metabolites, and immune function. Thirty Angus-crossbred steers were blocked by weight and assigned within block to one of 15 pens (two steers/pen). Pens were assigned randomly within blocks to one of three dietary treatments consisting of a corn-soybean meal supplement devoid of supplemental Se (negative control, NC) or corn-soybean meal supplements providing 1.7 mg supplemental Se/d as sodium selenite (inorganic Se, ISe) or as Se yeast (organic Se, OSe). Steers were offered fescue …

Effect Of Social Status Of Dairy Heifers On Expression Of Estrus And Subsequent Fertility, Dawn A. Elkins, Rick W. Rorie

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

A study was conducted to determine if social status of heifers within a herd influences estrus activity and subsequent fertility. Thirty cyclic dairy heifers were observed over a 14 d period and ranked by social status, based on a displacement index. The estrous cycles of the heifers were synchronized by treatment with two injections of prostaglandin F2a (PGF2a; Lutalyse, 25 mg) given 14 d apart. At the second PGF2a injection, HeatWatch transmitters were placed on the heifers for continuous monitoring of mounting (estrus) activity over the next 45 d. All heifers were artificially inseminated at estrus, using semen from a …

Chimpanzee Use Of Modulation In Response To Questions, Jen-Shiuan (Susan) Shiau

All Master's Theses

Modulation in American Sign Language is meaningful systematic change in sign form. Young cross-fostered chimpanzees used sign modulations in ways that resemble human signers. Jensvold and Gardner (2000) videotaped conversations between adult chimpanzees-Washoe, Moja, Tatu, and Dar-and a human interlocutor under four conditions: general, on-topic, off-topic, and can't. Signs from this dataset were selected and analyzed for modulation. Like human signers, the adult chimpanzees modulated the signing speed, size, length, and number of reiterations. They used both single and combinatorial modulations. Modulation use varied with different functional categories of signs. The chimpanzees varied the sign modulation on repeated glosses between …

Cetacean Brain Evolution: Multiplication Generates Complexity, Lori Marino

Anatomy Collection

Over the past 55-60 million years cetacean (dolphin, whale, and porpoise) brains have become hyperexpanded so that modern cetacean encephalization levels are second only to modern humans. At the same time, brain expansion proceeded along very different lines than in other large-brained mammals so that substantial differences between modern cetacean brains and other mammalian brains exist at every level of brain organization. Perhaps the most profound difference between cetacean and other mammalian brains is in the architecture of the neocortex. Cetaceans possess a unique underlying neocortical organizational scheme that is particularly intriguing in light of the fact that cetaceans exhibit …

Neuroanatomy Of The Killer Whale (Orcinus Orca) From Magnetic Resonance Images, Lori Marino, Chet C. Sherwood, Bradley N. Delman, Cheuk Y. Tang, Thomas P. Naidisch, Patrick R. Hof

Veterinary Science and Medicine Collection

This article presents the first series of MRI-based anatomically labeled sectioned images of the brain of the killer whale (Orcinus orca). Magnetic resonance images of the brain of an adult killer whale were acquired in the coronal and axial planes. The gross morphology of the killer whale brain is comparable in some respects to that of other odontocete brains, including the unusual spatial arrangement of midbrain structures. There are also intriguing differences. Cerebral hemispheres appear extremely convoluted and, in contrast to smaller cetacean species, the killer whale brain possesses an exceptional degree of cortical elaboration in the insular cortex, temporal …

Origin And Evolution Of Large Brains In Toothed Whales, Lori Marino, Daniel W. Mcshea, Mark D. Uhen

Veterinary Science and Medicine Collection

Toothed whales (order Cetacea: suborder Odontoceti) are highly encephalized, possessing brains that are significantly larger than expected for their body sizes. In particular, the odontocete superfamily Delphinoidea (dolphins, porpoises, belugas, and narwhals) comprises numerous species with encephalization levels second only to modern humans and greater than all other mammals. Odontocetes have also demonstrated behavioral faculties previously only ascribed to humans and, to some extent, other great apes. How did the large brains of odontocetes evolve? To begin to investigate this question, we quantified and averaged estimates of brain and body size for 36 fossil cetacean species using computed tomography and …

Size Matters: A Test Of Boldness In Eight Populations Of The Poeciliid Brachyraphis Episcopi, Culum Brown, Victoria Braithwaite

Sentience Collection

Individual variation in behaviour within populations may be explained in part by demographics and long-term, stable individual psychological differences. We examined the relation between boldness (taken as the time to emerge from a shelter and explore a novel environment) and body size in eight populations of the poeciliid Brachyraphis episcopi originating from sites upstream and downstream of waterfalls in four rivers that run into the Panama Canal. The relation between body size and time to emerge from a shelter was positive, with larger fish taking longer to emerge. This relation differed between downstream and upstream sites, being significant in the …

The Other Side Of Silence: Rachel Carson’S Views Of Animals, Marc Bekoff, Jan Nystrom

Animal Welfare Collection

The publication of Rachel Carson’s Silent Spring in 1962 is widely regarded as one of the major events that launched the modern environmental movement. Silent Spring is a compelling blend of stories, natural history, human values, and biological facts. In this essay we consider Carson’s attitude toward animals in Silent Spring and in other texts. Despite the facts that she was raised to love Nature and animals, little direct attention has been given to Carson’s views about our moral responsibilities to, and the moral standing of animals. Carson favored responsible stewardship, was more of an animal welfarist and environmentalist/conservation biologist …

Arkansas Animal Science Department Report 2004, Zelpha B. Johnson, D. Wayne Kellogg

Arkansas Agricultural Experiment Station Research Series

No abstract provided.

Laboratory Routines Cause Animal Stress, Jonathan P. Balcombe, Neal D. Barnard, Chad Sandusky

Laboratory Experiments Collection

Eighty published studies were appraised to document the potential stress associated with three routine laboratory procedures commonly performed on animals: handling, blood collection, and orogastric gavage. We defined handling as any non-invasive manipulation occurring as part of routine husbandry, including lifting an animal and cleaning or moving an animal's cage. Significant changes in physiologic parameters correlated with stress (e.g., serum or plasma concentrations of corticosterone, glucose, growth hormone or prolactin, heart rate, blood pressure, and behavior) were associated with all three procedures in multiple species in the studies we examined. The results of these studies demonstrated that animals responded with …