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	Author	Mettke-Hofmann, C.; Gwinner, E.
	Title	Long-term memory for a life on the move			Type	Journal Article
	Year	2003	Publication	Proceedings of the National Academy of Sciences of the United States of America	Abbreviated Journal	Proc. Natl. Acad. Sci. U.S.A.
	Volume	100	Issue	10	Pages	5863-5866
	Keywords	Animals; Germany; Israel; Memory/physiology; Models, Biological; Periodicity; Songbirds/physiology
	Abstract	Evidence is accumulating that cognitive abilities are shaped by the specific ecological conditions to which animals are exposed. Long-distance migratory birds may provide a striking example of this. Field observations have shown that, at least in some species, a substantial proportion of individuals return to the same breeding, wintering, and stopover sites in successive years. This observation suggests that migrants have evolved special cognitive abilities that enable them to accomplish these feats. Here we show that memory of a particular feeding site persisted for at least 12 months in a long-distance migrant, whereas a closely related nonmigrant could remember such a site for only 2 weeks. Thus, it seems that the migratory lifestyle has influenced the learning and memorizing capacities of migratory birds. These results build a bridge between field observations suggesting special memorization feats of migratory birds and previous neuroanatomical results from the same two species indicating an increase in relative hippocampal size from the first to the second year of life in the migrant but not in the nonmigrant.
	Address	Max Planck Research Centre for Ornithology, Department of Biological Rhythms and Behaviour, Von-der-Tann-Strasse 7, 82346 Andechs, Germany. mettke-hofmann@erl.ornithol.mpg.de
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0027-8424	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:12719527			Approved	no
	Call Number	refbase @ user @			Serial	511
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	Author	Uehara, T.; Yokomizo, H.; Iwasa, Y.
	Title	Mate-choice copying as Bayesian decision making			Type	Journal Article
	Year	2005	Publication	The American naturalist	Abbreviated Journal	Am Nat
	Volume	165	Issue	3	Pages	403-410
	Keywords	Animals; Bayes Theorem; Choice Behavior; Female; Male; Models, Biological; Sexual Behavior, Animal
	Abstract	Mate-choice copying by females has been reported in fishes (e.g., guppies) and lekking birds. Presumably, females assess males' quality using both information from direct observation of males and information acquired by observing other females' choices. Here, we study mathematically the conditions under which mate-choice copying is advantageous on the basis of Bayesian decision theory. A female may observe the mate choice of another female, called the model female, who has performed an optimal choice based on her own judgment. The conditions required for the focal female to choose the same mate as that chosen by the model female should depend on the male's appearance to her, the reliability of her own judgment of male quality, and the reliability of the model females. When three or more females are involved, the optimal mate choice critically depends on whether multiple model females make decisions independently or they themselves copy the choices of others. If two equally reliable females choose different males, the choice of the second female, made knowing the choice of the first, should have a stronger effect on the choice of the third (focal) female. This “last-choice precedence” should be tested experimentally.
	Address	Department of Biology, Faculty of Sciences, Kyushu University, Fukuoka 812-8581, Japan. uehara@bio-math.biology.kyushu-u.ac.jp
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1537-5323	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15729669			Approved	no
	Call Number				Serial	1821
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	Author	Tobin, T.; Combie, J.D.
	Title	Performance testing in horses: a review of the role of simple behavioral models in the design of performance experiments			Type	Journal Article
	Year	1982	Publication	Journal of Veterinary Pharmacology and Therapeutics	Abbreviated Journal	J Vet Pharmacol Ther
	Volume	5	Issue	2	Pages	105-118
	Keywords	Analgesics, Opioid/pharmacology; Animals; Apomorphine/pharmacology; Behavior, Animal/drug effects; Dose-Response Relationship, Drug; Fentanyl/pharmacology; Horses/physiology; Methylphenidate/pharmacology; *Models, Biological; Motor Activity/drug effects
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0140-7783	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:6125601			Approved	no
	Call Number	refbase @ user @			Serial	1957
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	Author	Flack, J.C.; Girvan, M.; de Waal, F.B.M.; Krakauer, D.C.
	Title	Policing stabilizes construction of social niches in primates			Type	Journal Article
	Year	2006	Publication	Nature	Abbreviated Journal	Nature
	Volume	439	Issue	7075	Pages	426-429
	Keywords	Animals; Conflict (Psychology); Female; Macaca nemestrina/physiology/psychology; Male; Models, Biological; *Social Behavior
	Abstract	All organisms interact with their environment, and in doing so shape it, modifying resource availability. Termed niche construction, this process has been studied primarily at the ecological level with an emphasis on the consequences of construction across generations. We focus on the behavioural process of construction within a single generation, identifying the role a robustness mechanism--conflict management--has in promoting interactions that build social resource networks or social niches. Using 'knockout' experiments on a large, captive group of pigtailed macaques (Macaca nemestrina), we show that a policing function, performed infrequently by a small subset of individuals, significantly contributes to maintaining stable resource networks in the face of chronic perturbations that arise through conflict. When policing is absent, social niches destabilize, with group members building smaller, less diverse, and less integrated grooming, play, proximity and contact-sitting networks. Instability is quantified in terms of reduced mean degree, increased clustering, reduced reach, and increased assortativity. Policing not only controls conflict, we find it significantly influences the structure of networks that constitute essential social resources in gregarious primate societies. The structure of such networks plays a critical role in infant survivorship, emergence and spread of cooperative behaviour, social learning and cultural traditions.
	Address	Santa Fe Institute, Santa Fe, New Mexico 87501, USA. jflack@santafe.edu
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1476-4687	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:16437106			Approved	no
	Call Number	refbase @ user @			Serial	298
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	Author	Reimers, M.; Schwarzenberger, F.; Preuschoft, S.
	Title	Rehabilitation of research chimpanzees: stress and coping after long-term isolation			Type	Journal Article
	Year	2007	Publication	Hormones and Behavior	Abbreviated Journal	Horm Behav
	Volume	51	Issue	3	Pages	428-435
	Keywords	Adaptation, Psychological/physiology; Animals; Animals, Laboratory; Exploratory Behavior; Hydrocortisone/analysis/metabolism; Male; Models, Biological; Pan troglodytes; Social Dominance; Social Environment; Social Isolation/psychology; Stress/*rehabilitation/veterinary; Time
	Abstract	We report on the permanent retirement of chimpanzees from biomedical research and on resocialization after long-term social isolation. Our aim was to investigate to what extent behavioral and endocrine measures of stress in deprived laboratory chimpanzees can be improved by a more species-typical social life style. Personality in terms of novelty responses, social dominance after resocialization and hormonal stress susceptibility were affected by the onset of maternal separation of infant chimpanzees and duration of deprivation. Chimpanzees, who were separated from their mothers at a younger age and kept in isolation for more years appeared to be more timid personalities, less socially active, less dominant and more susceptible to stress, as compared to chimpanzees with a less severe deprivation history. However, permanent retirement from biomedical research in combination with therapeutic resocialization maximizing chimpanzees' situation control resulted in reduced fecal cortisol metabolite levels. Our results indicate that chimpanzees can recover from severe social deprivation, and may experience resocialization as less stressful than solitary housing.
	Address	Department of Natural Sciences, Institute of Biochemistry, University of Veterinary Medicine, Veterinarplatz 1, 1210 Vienna, Austria. reimers@wild-vet.at
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0018-506X	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:17292368			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	4188
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	Author	Scheffer, M.; van Nes, E.H.
	Title	Self-organized similarity, the evolutionary emergence of groups of similar species			Type	Journal Article
	Year	2006	Publication	Proceedings of the National Academy of Sciences of the United States of America	Abbreviated Journal	Proc. Natl. Acad. Sci. U.S.A.
	Volume	103	Issue	16	Pages	6230-6235
	Keywords	Animals; Competitive Behavior; Ecosystem; Evolution; Models, Biological
	Abstract	Ecologists have long been puzzled by the fact that there are so many similar species in nature. Here we show that self-organized clusters of look-a-likes may emerge spontaneously from coevolution of competitors. The explanation is that there are two alternative ways to survive together: being sufficiently different or being sufficiently similar. Using a model based on classical competition theory, we demonstrate a tendency for evolutionary emergence of regularly spaced lumps of similar species along a niche axis. Indeed, such lumpy patterns are commonly observed in size distributions of organisms ranging from algae, zooplankton, and beetles to birds and mammals, and could not be well explained by earlier theory. Our results suggest that these patterns may represent self-constructed niches emerging from competitive interactions. A corollary of our findings is that, whereas in species-poor communities sympatric speciation and invasion of open niches is possible, species-saturated communities may be characterized by convergent evolution and invasion by look-a-likes.
	Address	Aquatic Ecology and Water Quality Management Group, Department of Environmental Sciences, Wageningen University, P.O. Box 8080, 6700 DD, Wageningen, The Netherlands. marten.scheffer@wur.nl
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0027-8424	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:16585519			Approved	no
	Call Number	refbase @ user @			Serial	510
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	Author	Bergstrom, C.T.; Lachmann, M.
	Title	Signaling among relatives. III. Talk is cheap			Type	Journal Article
	Year	1998	Publication	Proceedings of the National Academy of Sciences of the United States of America	Abbreviated Journal	Proc. Natl. Acad. Sci. U.S.A.
	Volume	95	Issue	9	Pages	5100-5105
	Keywords	Animal Communication; Animals; Costs and Cost Analysis; *Evolution; Interpersonal Relations; Models, Biological
	Abstract	The Sir Philip Sidney game has been used by numerous authors to show how signal cost can facilitate honest signaling among relatives. Here, we demonstrate that, in this game, honest cost-free signals are possible as well, under very general conditions. Moreover, these cost-free signals are better for all participants than the previously explored alternatives. Recent empirical evidence suggests that begging is energetically inexpensive for nestling birds; this finding led some researchers to question the applicability of the costly signaling framework to nestling begging. Our results show that cost-free or inexpensive signals, as observed empirically, fall within the framework of signaling theory.
	Address	Department of Biological Sciences, Stanford University, Stanford, CA 94305, USA. carl@charles.stanford.edu
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0027-8424	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:9560235			Approved	no
	Call Number	refbase @ user @			Serial	561
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	Author	Harcourt, J.L.; Ang, T.Z.; Sweetman, G.; Johnstone, R.A.; Manica, A.
	Title	Social feedback and the emergence of leaders and followers			Type	Journal Article
	Year	2009	Publication	Current Biology : CB	Abbreviated Journal	Curr Biol
	Volume	19	Issue	3	Pages	248-252
	Keywords	Analysis of Variance; Animals; Appetitive Behavior/physiology; Feedback; Great Britain; Leadership; Markov Chains; Models, Biological; Monte Carlo Method; Smegmamorpha/physiology; Social Behavior; Video Recording
	Abstract	In many animal groups, certain individuals consistently appear at the forefront of coordinated movements [1-4]. How such leaders emerge is poorly understood [5, 6]. Here, we show that in pairs of sticklebacks, Gasterosteus aculeatus, leadership arises from individual differences in the way that fish respond to their partner's movements. Having first established that individuals differed in their propensity to leave cover in order to look for food, we randomly paired fish of varying boldness, and we used a Markov Chain model to infer the individual rules underlying their joint behavior. Both fish in a pair responded to each other's movements-each was more likely to leave cover if the other was already out and to return if the other had already returned. However, we found that bolder individuals displayed greater initiative and were less responsive to their partners, whereas shyer individuals displayed less initiative but followed their partners more faithfully; they also, as followers, elicited greater leadership tendencies in their bold partners. We conclude that leadership in this case is reinforced by positive social feedback.
	Address	Department of Zoology, University of Cambridge, Cambridge, UK
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0960-9822	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:19185497			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	5123
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	Author	Flack, J.C.; de Waal, F.B.M.; Krakauer, D.C.
	Title	Social structure, robustness, and policing cost in a cognitively sophisticated species			Type	Journal Article
	Year	2005	Publication	The American Naturalist	Abbreviated Journal	Am Nat
	Volume	165	Issue	5	Pages	E126-139
	Keywords	Animals; Behavior, Animal; Cognition; Conflict (Psychology); Female; Macaca nemestrina/physiology; Male; Models, Biological; *Social Behavior
	Abstract	Conflict management is one of the primary requirements for social complexity. Of the many forms of conflict management, one of the rarest and most interesting is third-party policing, or intervening impartially to control conflict. Third-party policing should be hard to evolve because policers personally pay a cost for intervening, while the benefits are diffused over the whole group. In this study we investigate the incidence and costs of policing in a primate society. We report quantitative evidence of non-kin policing in the nonhuman primate, the pigtailed macaque. We find that policing is effective at reducing the intensity of or terminating conflict when performed by the most powerful individuals. We define a measure, social power consensus, that predicts effective low-cost interventions by powerful individuals and ineffective, relatively costly interventions by low-power individuals. Finally, we develop a simple probabilistic model to explore whether the degree to which policing can effectively reduce the societal cost of conflict is dependent on variance in the distribution of power. Our data and simple model suggest that third-party policing effectiveness and cost are dependent on power structure and might emerge only in societies with high variance in power.
	Address	Santa Fe Institute, Santa Fe, New Mexico 87501, USA. jflack@santafe.edu
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1537-5323	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15795848			Approved	no
	Call Number	refbase @ user @			Serial	168
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	Author	Johnson, D.D.P.; Stopka, P.; Knights, S.
	Title	Sociology: The puzzle of human cooperation			Type	Journal Article
	Year	2003	Publication	Nature	Abbreviated Journal	Nature
	Volume	421	Issue	6926	Pages	911-2; discussion 912
	Keywords	Altruism; Cooperative Behavior; Evolution; Humans; Models, Biological; Punishment; Reward; Risk
	Abstract
	Address	Olin Institute for Strategic Studies, Harvard University, Cambridge, Massachusetts 02138, USA. dominic@post.harvard.edu
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0028-0836	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:12606989			Approved	no
	Call Number	refbase @ user @			Serial	467
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