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Author |
PITRA, C.H.; STREICH, W.J.; REINSCH, A.; FICKEL, J. |
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Title |
Die Population des Somali-Wildesels (Equus africanus somalicus Sclater) in menschlicher Obhut: Demographische und genetische Aspekte |
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Journal Article |
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Year |
1995 |
Publication |
Zoologische Garten |
Abbreviated Journal |
Zool. Garten. |
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Volume |
N.F. 65 |
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4 |
Pages |
245-257 |
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1472 |
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Author |
Noë, R.; Hammerstein, P. |
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Title |
Biological markets |
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Journal Article |
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Year |
1995 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
Trends. Ecol. Evol |
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Volume |
10 |
Issue |
8 |
Pages |
336-339 |
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In biological markets, two classes of traders exchange commodities to their mutual benefit. Characteristics of markets are: competition within trader classes by contest or outbidding; preference for partners offering the highest value; and conflicts over the exchange value of commodities. Biological markets are currently studied under at least three different headings: sexual selection, intraspecific cooperation and interspecific mutualism. The time is ripe for the development of game theoretic models that describe the common core of biological markets and integrate existing knowledge from the separate fields. |
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0169-5347 |
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Equine Behaviour @ team @ |
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4993 |
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Author |
Connor, R.C. |
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Title |
Altruism among non-relatives: alternatives to the 'Prisoner's Dilemma' |
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Journal Article |
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Year |
1995 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
Trends Ecol Evol |
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Volume |
10 |
Issue |
2 |
Pages |
84-86 |
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Triver's model of reciprocal altruism, and its descendants based on the Prisoner's Dilemma model, have dominated thinking about cooperation and altruism between non-relatives. However, there are three alternative models of altruism directed to non-relatives. These models, which are not based on the Prisoner's Dilemma, may explain a variety of phenomena, from allogrooming among impala to helping by non-relatives in cooperatively breeding birds and mammals. |
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Division of Biological Sciences and The Michigan Society of Fellows, Museum of Zoology, University of Michigan, Ann Arbor MI, 48109, USA |
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English |
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0169-5347 |
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PMID:21236964 |
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Equine Behaviour @ team @ |
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5407 |
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McGreevy, P.D.; French, N.P.; Nicol, C.J. |
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Title |
The prevalence of abnormal behaviours in dressage, eventing and endurance horses in relation to stabling |
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Journal Article |
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Year |
1995 |
Publication |
The Veterinary record |
Abbreviated Journal |
Vet. Rec. |
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Volume |
137 |
Issue |
2 |
Pages |
36-37 |
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Animal Husbandry/*methods; Animals; *Behavior, Animal; Horse Diseases/*psychology; Horses; *Physical Conditioning, Animal; Prevalence; Questionnaires; *Stereotyped Behavior |
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Abstract |
The behaviour of horses competing in different disciplines was studied and the relationship between the time they spent out of the stable and the prevalence of abnormal behaviour was examined. The owners of dressage, eventing and endurance horses were sent a questionnaire and a total of 1101 responses were received, giving data on 1750 horses. The behaviours studied were wood-chewing, weaving, crib-biting/wind-sucking and box-walking. The reported percentage prevalences of abnormal behaviour for the dressage, eventing and endurance horses were 32.5, 30.8 and 19.5, respectively. The relationship between the time spent in the stable and the prevalence of abnormal behaviour was examined by chi 2 tests which showed that there were significant linear trends for the eventing group (P < 0.001) and the dressage group (P < 0.05). It is concluded that the time a horse spends out of the stable is related to the discipline for which it is being trained and in dressage and eventing horses the time spent in a stable is correlated with an increased risk of abnormal behaviour. |
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University of Bristol, Department of Clinical Veterinary Science, Langford |
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0042-4900 |
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PMID:8525580 |
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refbase @ user @ |
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89 |
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Author |
Houpt, K.A. |
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Title |
Learning in horses. |
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Book Chapter |
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Year |
1995 |
Publication |
The thinking horse. |
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Pages |
12-17 |
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Equine Research Centre |
Place of Publication |
Guelph, Canada |
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Equine Behaviour @ team @ |
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3585 |
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Author |
Boissy, A. |
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Title |
Fear and Fearfulness in Animals |
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Journal Article |
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Year |
1995 |
Publication |
The Quarterly Review of Biology |
Abbreviated Journal |
The Quarterly Review of Biology |
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Volume |
70 |
Issue |
2 |
Pages |
165-191 |
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Abstract |
Persistence of individual differences in animal behavior in reactions to various environmental challenges could reflect basic divergences in temperament, which might be used to predict details of adaptive response. Although studies have been carried out on fear and anxiety in various species, including laboratory, domestic and wild animals, no consistent definition of fearfulness as a basic trait of temperament has emerged. After a classification of the events that may produce a state of fear, this article describes the great variability in behavior and in physiological patterns generally associated with emotional reactivity. The difficulties of proposing fearfulness-the general capacity to react to a variety of potentially threatening situations-as a valid basic internal variable are then discussed. Although there are many studies showing covariation among the psychobiological responses to different environmental challenges, other studies find no such correlations and raise doubts about the interpretation of fearfulness as a basic personality trait. After a critical assessment of methodologies used in fear and anxiety studies, it is suggested that discrepancies among results are mainly due to the modulation of emotional responses in animals, which depend on numerous genetic and epigenetic factors. It is difficult to compare results obtained by different methods from animals reared under various conditions and with different genetic origins. The concept of fearfulness as an inner trait is best supported by two kinds of investigations. First, an experimental approach combining ethology and experimental psychology produces undeniable indicators of emotional reactivity. Second, genetic lines selected for psychobiological traits prove useful in establishing between behavioral and neuroendocrine aspects of emotional reactivity. It is suggested that fearfulness could be considered a basic feature of the temperament of each individual, one that predisposes it to respond similarly to a variety of potentially alarming challenges, but is nevertheless continually modulated during development by the interaction of genetic traits of reactivity with environmental factors, particularly in the juvenile period. Such interaction may explain much of the interindividual variability observed in adaptive responses. |
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The University of Chicago Press |
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0033-5770 |
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doi: 10.1086/418981 |
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Equine Behaviour @ team @ |
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6664 |
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Author |
Clutton-Brock, J. |
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Title |
Origins of the dog: domestication and early history |
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Book Chapter |
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Year |
1995 |
Publication |
The Domestic Dog: Its Evolution, Behaviour and Interactions with People |
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Cambridge University Press |
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Cambridge |
Editor |
Serpell, J.A. |
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Equine Behaviour @ team @ Clutton-Brock1995 |
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6247 |
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Author |
Maddock, L. |
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Title |
The “migration” and grazing succession |
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Book Chapter |
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Year |
1995 |
Publication |
Serengeti: Dynamics of an Ecosystem |
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Editorial Reviews
Book Description
Originally published in 1979, Serengeti: Dynamics of an Ecosystem was immediately recognized as the first synthesis of the patterns and processes of a major ecosystem. A prototype for initial studies, Serengeti contains baseline data for further and comparative studies of ecosystems. The new Serengeti II builds on the information presented originally in Serengeti; both books together offer essential information and insights for ecology and conservation biology. |
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University Of Chicago Press |
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Chicago |
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Sinclair, A.R.E. ; Norton-Griffiths, A.R.E. |
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Serengeti: Dynamics of an Ecosystem |
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978-0226760292 |
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Equine Behaviour @ team @ |
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2343 |
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Author |
de Waal, F.B. |
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Title |
Bonobo sex and society |
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Journal Article |
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Year |
1995 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
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272 |
Issue |
3 |
Pages |
82-88 |
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Animals; Evolution; Female; Hominidae; Humans; Male; Pan troglodytes/*physiology; Sexual Behavior, Animal/*physiology; Social Behavior |
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Yerkes Regional Primate Research Center, Atlanta |
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English |
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0036-8733 |
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PMID:7871411 |
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no |
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refbase @ user @ |
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206 |
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Author |
Swaddle, J.P.; Witter, M.S. |
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Title |
Chest Plumage, Dominance and Fluctuating Asymmetry in Female Starlings |
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Journal Article |
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Year |
1995 |
Publication |
Proceedings of the Royal Society B: Biological Sciences |
Abbreviated Journal |
Proc. Roy. Soc. Lond. B Biol. Sci. |
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Volume |
260 |
Issue |
1358 |
Pages |
219-223 |
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Abstract |
It has been proposed that levels of fluctuating asymmetry (FA) may be used in establishing and maintaining dominance hierarchies, as asymmetry reflects aspects of individual quality. However, previous manipulations of FA have failed to reveal that the level or outcome of agonistic intra-sexual interactions are affected by levels of FA. In female European starlings (Sturnus vulgaris), correlational data suggest that FA of the speckled chest plumage may be related to dominance status. These data are confounded, however, by total number of spots on the chest and the proportion of the chest that is white, both of which positively covary with chest asymmetry. Thus, we deconfounded the effects of these plumage traits on dominance by experimentally manipulating the number of spots and spot number asymmetry in a factorial design. The results indicated that dominance is influenced by the number of spots on the chest, but not by spot asymmetry. Birds with spottier chests were dominant over birds with experimentally decreased spot number. We suggest that female starlings' chests are exposed to extensive abrasion throughout the breeding season and so are susceptible to damage asymmetries that may mask the `true' fluctuating asymmetry of the trait. This may devalue the use of chest asymmetry as a quality indicator. Spottier chests may be costly to maintain, in part because of increased susceptibility to abrasion, and so may be a better indicator of quality than asymmetry. |
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Equine Behaviour @ team @ |
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2202 |
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