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Author Stutz, W.A.; Topliff, D.R.; Freeman, D.W.; Tucker, W.B.; Breazile, J.W.; Wall, D.L.
Title Effects of dietary cation-anion balance on blood parameters in exercising horses Type Journal Article
Year 1992 Publication Journal of Equine Veterinary Science Abbreviated Journal
Volume 12 Issue 3 Pages 164-167
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Abstract Summary Four geldings and four mares of primarily Thoroughbred and Quarter Horse breeding were used in simultaneous 4x4 Latin square experiments to test the effects of dietary cation-anion balance (DCAB), defined as meq ((Na+K)-C1)/kg diet dry matter, on blood pH, blood gases, acid-base status and plasma glucose in horses at rest and following anaerobic exercise. Four diets, consisting of a base concentrate of corn, soybean meal and cottonseed hulls fed in a 60:40 ratio with Bermudagrass hay, were formulated to provide a DCAB of 5 (L=Low), 107 (ML=Medium Low), 201 (MH=Medium High) and 327 (H=High) meq ((Na+K)-C1)/kg diet dry matter. Calcium chloride and ammonium chloride were added to treatment L and ML and sodium bicarbonate and potassium citrate were added to treatment H to achieve the desired cation-anion balance. Treatment MH was not supplemented and served as the control treatment. Prior to the experiment, horses performed six weeks of long, slow, distance (LSD) work. During the experimental periods, horses were subjected to an exercise regimen alternating LSD with an interval training protocol 6 days/week. Venous blood pH, pCO2 and bicarbonate levels were significantly lower in horses at rest consuming diet L versus diets MH and H. Blood pH and acid-base parameters decreased with decreasing DCAB. There were no significant differences in blood pH or acid-base parameters between treatments, after anaerobic exercise. Plasma glucose concentrations for treatment L were significantly lower than treatment H at 10, 20, and 30 minutes post-exercise. These data suggest that DCAB has significant effect on acid-base status and indicate that horses consuming diets with low DCAB may experience a metabolic acidosis.
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ISSN 0737-0806 ISBN Medium
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Call Number Equine Behaviour @ team @ Serial 4834
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Author Nowak, M.A.; Sigmund, K.
Title Tit for tat in heterogeneous populations Type Journal Article
Year 1992 Publication Nature Abbreviated Journal Nature
Volume 355 Issue Pages 250-253
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Notes 10.1038/355250a0 Approved (up) no
Call Number Equine Behaviour @ team @ Serial 4842
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Author Dugatkin, L.A.; Mesterton-Gibbons, M.; Houston, A.I.
Title Beyond the prisoner's dilemma: Toward models to discriminate among mechanisms of cooperation in nature Type Journal Article
Year 1992 Publication Trends Evol. Ecol. Abbreviated Journal
Volume 7 Issue Pages 202-205
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Abstract The iterated prisoner's dilemma game, or IPD, has now established itself as the orthodox paradigm for theoretical investigations of the evolution of cooperation; but its scope is restricted to reciprocity, which is only one of three categories of cooperation among unrelated individuals. Even within that category, a cooperative encounter has in general three phases, and the IPD has nothing to say about two of them. To distinguish among mechanisms of cooperation in nature, future theoretical work on the evolution of cooperation must distance itself from economics and develop games as a refinement of ethology's comparative approach.
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Notes 10.1016/0169-5347(92)90074-L Approved (up) no
Call Number Equine Behaviour @ team @ Serial 4843
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Author Aureli, F.; Cossolino, R.; Cordischi, C.; Scucchi, S.
Title Kin-oriented redirection among Japanese macaques: an expression of a revenge system? Type Journal Article
Year 1992 Publication Animal Behaviour. Abbreviated Journal Anim. Behav.
Volume 44 Issue 2 Pages 283-291
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Abstract The ability to recognize the close associates of other group members may permit the display of redirected aggression against the relatives of the former aggressor. However, the dominance structure and the kin-based alliance system of macaque society are expected not to favour the occurrence of this kin-oriented redirection. Nevertheless, within 1 h of being the victim of an attack, Japanese macaques, Macaca fuscata, were more likely to attack the former aggressor's kin than without such a conflict. The conditions under which the victim redirected against the former aggressor's kin were investigated. This kin-oriented redirection did not occur preferentially either after conflicts between individuals with unstable and/or uncertain dominance relationships or after conflicts with individuals that were unlikely to intervene in favour of their kin. Victims redirected against individuals that were younger than the former aggressor and often subordinate to the victim. They also redirected in an opportunistic way by joining polyadic interactions against the former aggressor's kin. The possibility that this kin-oriented redirection may have a long-term function in changing the aggressive attitude of the aggressor towards the victim is also discussed. In addition, the victim's kin also displayed a form of kin-oriented redirection. They were more likely to attack the kin of an individual after it had attacked their own kin.
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Notes 10.1016/0003-3472(92)90034-7 Approved (up) no
Call Number Equine Behaviour @ team @ Serial 4867
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Author de Waal, F. B. M.
Title Coalitions as part of reciprocal relations in the Arnhem chimpanzee colony Type Book Chapter
Year 1992 Publication Coalitions and Alliances in Humans and Other Animals Abbreviated Journal
Volume Issue Pages 233-257
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Publisher Oxford University Press Place of Publication Oxford Editor Harcourt, A.H.; de Waal, F.B.M.
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Call Number Equine Behaviour @ team @ Serial 4877
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Author Manson, J.H.
Title Measuring female mate choice in Cayo Santiago rhesus macaques Type Journal Article
Year 1992 Publication Animal Behaviour. Abbreviated Journal Anim. Behav.
Volume 44 Issue Pages 405-416
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Abstract Few studies of female mate choice have been carried out among free-ranging non-human primates. To qualify as female mate choice, behaviour by oestrous females must predict the occurrence or rate of potentially fertile copulations, in comparisons between heterosexual dyads. In this paper, data are presented to show three behaviour patterns that meet this criterion in free-ranging rhesus macaques, Macaca mulatta, at the island colony of Cayo Santiago: (1) selective cooperation with male sexual solicitations (hip-grasps), (2) restoration of proximity following attacks on females by intruding males, and (3) proximity maintenance (in one of two study groups). Oestrous females maintained proximity preferentially to lower ranking males, but this appeared to reflect differences in the tactics necessary to achieve copulations with males of different dominance ranks, rather than preference for lower ranking mates. Male-oestrous female dyads showed consistency over two consecutive mating seasons in which partner was responsible for proximity maintenance. Male dominance rank was positively correlated with copulatory rate with fertile females. However, in one study group, males to whom oestrous females maintained proximity more actively had higher copulatory rates with fertile females, independent of the effects of male dominance rank.
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Notes 10.1016/0003-3472(92)90051-A Approved (up) no
Call Number Equine Behaviour @ team @ Serial 4889
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Author Boyd, R.; Richerson, P.J.
Title Punishment allows the evolution of cooperation (or anything else) in sizable groups Type Journal Article
Year 1992 Publication Ethol. Sociobiol. Abbreviated Journal
Volume 13 Issue Pages 171-195
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Abstract Existing models suggest that reciprocity is unlikely to evolve in large groups as a result of natural selection. In these models, reciprocators punish noncooperation by with-holding future cooperation, and thus also penalize other cooperators in the group. Here, we analyze a model in which the response is some form of punishment that is directed solely at noncooperators. We refer to such alternative forms of punishment as retribution. We show that cooperation enforced by retribution can lead to the evolution of cooperation in two qualitatively different ways. (1) If benefits of cooperation to an individual are greater than the costs to a single individual of coercing the other n − 1 individuals to cooperate, then strategies which cooperate and punish noncooperators, strategies which cooperate only if punished, and, sometimes, strategies which cooperate but do not punish will coexist in the long run. (2) If the costs of being punished are large enough, moralistic strategies which cooperate, punish noncooperators, and punish those who do not punish noncooperators can be evolutionarily stable. We also show, however, that moralistic strategies can cause any individually costly behavior to be evolutionarily stable, whether or not it creates a group benefit.
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Notes 10.1016/0162-3095(92)90032-Y Approved (up) no
Call Number Equine Behaviour @ team @ Serial 4913
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Author Reeve, H.K.
Title Queen activation of lazy workers in colonies of the eusocial naked mole-rat Type Journal Article
Year 1992 Publication Nature Abbreviated Journal Nature
Volume 358 Issue Pages 147-149
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Notes 10.1038/358147a0 Approved (up) no
Call Number Equine Behaviour @ team @ Serial 4921
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Author Ehardt, C.L.; Bernstein, I.S.
Title Conflict intervention behaviour by adult male macaques: structural and functional aspects Type Book Chapter
Year 1992 Publication Coalitions and Alliances in Humans and Other Animals Abbreviated Journal
Volume Issue Pages 83-111
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Publisher Oxford University Press Place of Publication Oxford Editor Harcourt, A.H.; de Waal, F.B.M.
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Call Number Equine Behaviour @ team @ Serial 4926
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Author Schneider, K.
Title Emotionen Type Book Chapter
Year 1992 Publication Allgemeine Psychologie Abbreviated Journal
Volume Issue Pages
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Publisher Verlag Hans Huber Place of Publication Bern Editor Spada Hans
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ISSN ISBN 3456823029 Medium
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Call Number Equine Behaviour @ team @ Serial 5070
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