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Hopster, H.; van der Werf, J.T.; Erkens, J.H.; Blokhuis, H.J. |
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Title |
Effects of repeated jugular puncture on plasma cortisol concentrations in loose-housed dairy cows |
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Journal Article |
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Year |
1999 |
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Journal of Animal Science |
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J Anim. Sci |
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77 |
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3 |
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708-714 |
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Equine Behaviour @ team @ |
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5486 |
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Author |
Mladenoff, D.J.; Sickley, T.A.; Wydeven, A.P. |
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Title |
Predicting gray wolf landscape recolonization: logistic regression models vs. new field data |
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Journal Article |
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Year |
1999 |
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Ecol Appl |
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9 |
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Equine Behaviour @ team @ Mladenoff1999 |
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6442 |
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Author |
Goodwin, D. |
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Title |
The importance of ethology in understanding the behaviour of the horse |
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Journal Article |
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Year |
1999 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Veterinary Journal |
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31 |
Issue |
S28 |
Pages |
15-19 |
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Keywords |
horse; behaviour; domestication; interspecific communication |
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Summary Domestication has provided the horse with food, shelter, veterinary care and protection, allowing individuals an increased chance of survival. However, the restriction of movement, limited breeding opportunities and a requirement to expend energy, for the benefit of another species, conflict with the evolutionary processes which shaped the behaviour of its predecessors. The behaviour of the horse is defined by its niche as a social prey species but many of the traits which ensured the survival of its ancestors are difficult to accommodate in the domestic environment. There has been a long association between horses and man and many features of equine behaviour suggest a predisposition to interspecific cooperation. However, the importance of dominance in human understanding of social systems has tended to overemphasise its importance in the human-horse relationship. The evolving horse-human relationship from predation to companionship, has resulted in serial conflicts of interest for equine and human participants. Only by understanding the nature and origin of these conflicts can ethologists encourage equine management practices which minimise deleterious effects on the behaviour of the horse. |
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American Medical Association (AMA) |
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0425-1644 |
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Equine Behaviour @ team @ |
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6714 |
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Pinker, S. |
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Title |
COGNITION:Enhanced: Out of the Minds of Babes |
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Journal Article |
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1999 |
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Science |
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Science |
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283 |
Issue |
5398 |
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40-41 |
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10.1126/science.283.5398.40 |
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Equine Behaviour @ team @ |
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2956 |
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Author |
Taberlet, P.; Waits, L.P.; Luikart, G. |
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Title |
Noninvasive genetic sampling: look before you leap |
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Journal Article |
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Year |
1999 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
Trends Ecol. Evol |
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14 |
Issue |
8 |
Pages |
323-327 |
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Hairs; Feces; Feathers; Allelic dropout; Individual identification; Conservation genetics; Behavioural ecology; Pilot study; Microsatellites; Probability of identity |
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Abstract |
Noninvasive sampling allows genetic studies of free-ranging animals without the need to capture or even observe them, and thus allows questions to be addressed that cannot be answered using conventional methods. Initially, this sampling strategy promised to exploit fully the existing DNA-based technology for studies in ethology, conservation biology and population genetics. However, recent work now indicates the need for a more cautious approach, which includes quantifying the genotyping error rate. Despite this, many of the difficulties of noninvasive sampling will probably be overcome with improved methodology. |
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0169-5347 |
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no |
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Equine Behaviour @ team @ |
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6573 |
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Author |
Price, E.O. |
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Title |
Behavioral development in animals undergoing domestication |
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Journal Article |
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Year |
1999 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
App Anim Behav Sci |
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65 |
Issue |
3 |
Pages |
245-271 |
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Domestication; Domestic animals; Captivity; Behavioral development; Feral; Reintroduction |
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The process of domestication involves adaptation, usually to a captive environment. Domestication is attained by some combination of genetic changes occurring over generations and developmental mechanisms (e.g., physical maturation, learning) triggered by recurring environmental events or management practices in captivity that influence specific biological traits. The transition from free-living to captive status is often accompanied by changes in availability and/or accessibility of shelter, space, food and water, and by changes in predation and the social environment. These changes set the stage for the development of the domestic phenotype. Behavioral development in animals undergoing domestication is characterized by changes in the quantitative rather than qualitative nature of responses. The hypothesized loss of certain behavior patterns under domestication can usually be explained by the heightening of response thresholds. Increases in response frequency accompanying domestication can often be explained by atypical rates of exposure to certain forms of perceptual and locomotor stimulation. Genetic changes influencing the development of the domestic phenotype result from inbreeding, genetic drift, artificial selection, natural selection in captivity, and relaxed selection. Experiential contributions to the domestic phenotype include the presence or absence of key stimuli, changes in intraspecific aggressive interactions and interactions with humans. Man's role as a buffer between the animal and its environment is also believed to have an important effect on the development of the domestic phenotype. The domestication process has frequently reduced the sensitivity of animals to changes in their environment, perhaps the single-most important change accompanying domestication. It has also resulted in modified rates of behavioral and physical development. Interest in breeding animals in captivity for release in nature has flourished in recent decades. The capacity of domestic animals to survive and reproduce in nature may depend on the extent to which the gene pool of the population has been altered during the domestication process and flexibility in behavioral development. “Natural” gene pools should be protected when breeding wild animals in captivity for the purpose of reestablishing free-living natural populations. In some cases, captive-reared animals must be conditioned to live in nature prior to their release. |
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0168-1591 |
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no |
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Equine Behaviour @ team @ |
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5663 |
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Author |
Whitehead, H.; Dufault, S. |
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Title |
Techniques for Analyzing Vertebrate Social Structure Using Identified Individuals: Review and Recommendations |
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Book Chapter |
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Year |
1999 |
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Volume 28 |
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33-74 |
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Academic Press |
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Peter J.B. Slater, J.S.R., Charles T. Snowden and Timothy J. Roper |
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0065-3454 |
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no |
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Equine Behaviour @ team @ |
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4987 |
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Hare, B.; Tomasello, M. |
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Title |
Domestic Dogs (Canis familiaris) Use Human and Conspecific Social Cues to Locate Hidden Food |
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Journal Article |
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Year |
1999 |
Publication |
Journal of Comparative Psychology |
Abbreviated Journal |
J. Comp. Psychol. |
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Volume |
113 |
Issue |
2 |
Pages |
173-177 |
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Abstract |
Ten domestic dogs (Canis familiaris) of different breeds and ages were exposed to 2 different social cues indicating the location of hidden food, each provided by both a human informant and a conspecific informant (for a total of 4 different social cues). For the local enhancement cue, the informant approached the location where food was hidden and then stayed beside it. For the gaze and point cue, the informant stood equidistant between 2 hiding locations and bodily oriented and gazed toward the 1 in which food was hidden (the human informant also pointed). Eight of the 10 subjects, including the one 6-month-old juvenile, were above chance with 2 or more cues. Results are discussed in terms of the phylogenetic and ontogenetic processes by means of which dogs come to use social cues to locate food. |
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refbase @ user @ |
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590 |
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Author |
Hanggi, E.B. |
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Title |
Categorization Learning in Horses (Equus caballus) |
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Journal Article |
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Year |
1999 |
Publication |
Journal of Comparative Psychology |
Abbreviated Journal |
J. Comp. Psychol. |
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Volume |
113 |
Issue |
3 |
Pages |
243-252 |
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Categorization learning was investigated in 2 horses (Equus caballus). Both horses learned to select a 2-dimensional black stimulus with an open center instead of a filled stimulus in a 2-choice discrimination task. After a criterion of 10 out of 10 correct responses in a random series for 2 consecutive sessions was reached, 15 additional pairs of open-center versus filled stimuli were tested. Each was run to criterion and then incorporated into sessions of randomly mixed problems. Both horses solved the 1st problem by simple pattern discrimination and showed evidence of categorical processing for subsequent problems. New pairs were learned with few or no errors, and correct responses on novel trials were significantly above chance. These results suggest that the horses were making their selections on the basis of shared characteristics with the training stimuli and were using categorization skills in problem solving. |
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yes |
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Equine Behaviour @ team @ |
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3678 |
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Author |
Fishman, M.A. |
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Title |
Predator Inspection: Closer Approach as a Way to Improve Assessment of Potential Threats |
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Journal Article |
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Year |
1999 |
Publication |
Journal of Theoretical Biology |
Abbreviated Journal |
J. Theor. Biol. |
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Volume |
196 |
Issue |
2 |
Pages |
225-235 |
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Abstract |
When detecting a predator, some prey animals respond in a counterintuitive fashion by approaching, rather than fleeing, that potential threat of extinction. This seemingly paradoxical behaviour, known aspredator inspection, has been reported for a wide variety of taxa--and therefore can be assumed to be adaptive. However, the view of predator inspection as a paradoxical behaviour rests on two implicit assumptions: (a) initial predator detecting is unambiguous, with no uncertainty in discriminating between hunting and non hunting members of predator species, or members of predator species and unrelated phenomena; (b) the costs of flight are negligible relative to the risk of predation. Upon reflection assumption (a) is not really tenable. Whereas assumption (b) is not consistent with experimental evidence [Godin & Crossman (1994)Behav. Ecol. Sociobiol.34,359-366]. Given that predator detection is ambiguous and the costs of flight are not negligible, a prey individual may benefit by a closer approach to the source of the alarming signals, thus improving its assessment of the situation--despite the increased risk of predation. In this paper, the above statement is given rigor by reformulating the problem in game theoretical terms. The results indicate that a prey will minimize its costs by performing predator inspection whenever its degree of certainty regarding predator identification and/or assessment of its intentions is less than a threshold, which is determined by the model's parameters. |
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refbase @ user @ |
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523 |
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