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Overli, O.; Korzan, W.J.; Hoglund, E.; Winberg, S.; Bollig, H.; Watt, M.; Forster, G.L.; Barton, B.A.; OVerli, E.; Renner, K.J.; Summers, C.H. |
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Title |
Stress coping style predicts aggression and social dominance in rainbow trout |
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Journal Article |
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Year |
2004 |
Publication |
Hormones and Behavior |
Abbreviated Journal |
Horm Behav |
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45 |
Issue |
4 |
Pages |
235-241 |
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Adaptation, Psychological/physiology; Aggression/*physiology; Animals; *Dominance-Subordination; Female; *Hierarchy, Social; Hydrocortisone/blood; Individuality; Male; Matched-Pair Analysis; Oncorhynchus mykiss/*physiology; Stress/*physiopathology |
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Social stress is frequently used as a model for studying the neuroendocrine mechanisms underlying stress-induced behavioral inhibition, depression, and fear conditioning. It has previously been shown that social subordination may result in increased glucocorticoid release and changes in brain signaling systems. However, it is still an open question which neuroendocrine and behavioral differences are causes, and which are consequences of social status. Using juvenile rainbow trout of similar size and with no apparent differences in social history, we demonstrate that the ability to win fights for social dominance can be predicted from the duration of a behavioral response to stress, in this case appetite inhibition after transfer to a new environment. Moreover, stress responsiveness in terms of confinement-induced changes in plasma cortisol was negatively correlated to aggressive behavior. Fish that exhibited lower cortisol responses to a standardized confinement test were markedly more aggressive when being placed in a dominant social position later in the study. These findings support the view that distinct behavioral-physiological stress coping styles are present in teleost fish, and these coping characteristics influence both social rank and levels of aggression. |
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Biology Department and Neuroscience Group, University of South Dakota, Vermillion, SD 57069, USA. oyvind.overli@bio.uio.no |
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0018-506X |
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PMID:15053939 |
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Equine Behaviour @ team @ |
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4192 |
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McGreevy, P.D. |
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2004 |
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Equine Behavior: A Guide for Veterinarians and Equine Scientists |
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Cited By (since 1996): 25; Export Date: 21 October 2008 |
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Equine Behaviour @ team @ |
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4530 |
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Author |
McLean, A.N. |
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Title |
The mental processes of the horse and their consequences for training |
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2004 |
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Animal Welfare Science Centre |
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Cited By (since 1996): 1; Export Date: 24 October 2008 |
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Admin @ knut @ |
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4619 |
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Kleiven, J.; Bjerke, T.; Kaltenborn, B.P. |
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Title |
Factors influencing the social acceptability of large carnivore behaviours |
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2004 |
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Biodivers Conserv |
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13 |
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Equine Behaviour @ team @ Kleiven2004 |
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6447 |
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Apollonio, M.; Mattioli, L.; Scandura, M.; Mauri, L.; Gazzola, A.; Avanzinelli, E. |
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Title |
Wolves in the Casentinesi Forests: insights for wolf conservation in Italy from a protected area with a rich wild prey community |
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2004 |
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Biol Conserv |
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120 |
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no |
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Equine Behaviour @ team @ Apollonio2004 |
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6475 |
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Author |
Bloom, P. |
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Title |
Behavior. Can a dog learn a word? |
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Journal Article |
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2004 |
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Science (New York, N.Y.) |
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Science |
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304 |
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5677 |
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1605-1606 |
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Keywords |
Animals; Child; Child, Preschool; *Dogs; Humans; *Learning; *Memory; *Vocabulary |
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Department of Psychology, Yale University, Post Office Box 208205, New Haven, CT 06520-8205, USA. paul.bloom@yale.edu |
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1095-9203 |
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PMID:15192205 |
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no |
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28 |
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Author |
de Waal, F.B.M. |
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Title |
Peace lessons from an unlikely source |
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Journal Article |
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2004 |
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PLoS biology |
Abbreviated Journal |
PLoS. Biol. |
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2 |
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4 |
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E101 |
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Animals; Behavior; Behavior, Animal; Culture; Humans; Interpersonal Relations; Research; Social Conditions; Social Environment; United States; *Violence |
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Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, USA. dewaal@emory.edu |
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1545-7885 |
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PMID:15094805 |
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no |
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Call Number |
refbase @ user @ |
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174 |
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Author |
Markman, E.M.; Abelev, M. |
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Title |
Word learning in dogs? |
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Journal Article |
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2004 |
Publication |
Trends in Cognitive Sciences |
Abbreviated Journal |
Trends. Cognit. Sci. |
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8 |
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11 |
Pages |
479-81; discussion 481 |
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Keywords |
Animals; Association Learning; Dogs; *Learning; *Verbal Learning; *Vocabulary |
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In a recent paper, Kaminski, Call and Fischer report pioneering research on word-learning in a dog. In this commentary we suggest ways of distinguishing referential word use from mere association. We question whether the dog is reasoning by exclusion and, if so, compare three explanations – learned heuristics, default assumptions, and pragmatic reasoning – as they apply to children and might apply to dogs. Kaminski et al.'s work clearly raises important questions about the origins and basis of word learning and social cognition. |
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Department of Psychology, Stanford University, Bldg 420, Stanford, CA 94305-2130, USA |
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1364-6613 |
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PMID:15491899 |
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refbase @ user @ |
Serial |
274 |
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Author |
Rietmann, T.R.; Stuart, A.E.A.; Bernasconi, P.; Stauffacher, M.; Auer, J.A.; Weishaupt, M.A. |
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Title |
Assessment of mental stress in warmblood horses: heart rate variability in comparison to heart rate and selected behavioural parameters |
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Journal Article |
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Year |
2004 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
88 |
Issue |
1-2 |
Pages |
121-136 |
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Keywords |
Horse; Hrv; Heart rate; Mental stress; Behaviour; Autonomic nervous system |
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Abstract |
The aim of the study was to investigate whether heart rate variability (HRV) could assess alterations of the autonomic nervous system (ANS) at different levels of excitement. The behavioural and physiological responses of 20 warmblood horses to a challenging ground exercise task were studied. Prior to the experiment, the horses were evaluated at rest and during forward walking (FW). The horses were then forced to move backwards continuously during 3 min according to a standardised protocol (BW1). Subsequently, the horses were exposed to two training sessions, after which the backward walking (BW2) was re-evaluated. Heart rate (HR) and HRV-parameters such as the standard deviation of the beat-to-beat intervals (SDRR), the low (LF; sympathetic tone) and high frequency (HF) component of HRV (HF; parasympathetic tone) and their ratio (LF/HF; index representing the sympatho-vagal balance) were sampled at rest, and during FW, BW1 and BW2. Stress-related behaviour during BW1 and BW2 was determined from video recordings. The results of the different evaluations were compared to each other. Compared to rest and FW, the first backward experiment induced a significant rise in HR, LF and LF/HF and a significant decrease of HF. SDRR decreased from both FW and rest with only the latter reaching significance. In BW2 after the training sessions, HR and the parameters of the sympathetic branch of the ANS (LF, LF/HF) were decreased and the vagal tone (HF) increased compared to BW1; all changes were significant. The duration of stress indicating behavioural patterns revealed also a significant decrease of excitement after the training, when backward walking did not differ from forward walking in any parameter. Correlations between HRV-parameters and stress indicating behaviour as well as HR were found. We conclude that the HRV-parameters LF and HF are valuable measures to quantify sympatho-vagal balance, which allows a more precise assessment of the responses of HR and SDRR to mental stress during low intensity exercise. |
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refbase @ user @ |
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314 |
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Author |
Gardner, A., West, S. A. |
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Title |
Cooperation and Punishment, Especially in Humans |
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Journal Article |
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Year |
2004 |
Publication |
The American Naturalist |
Abbreviated Journal |
Americ. Natur. |
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Volume |
164 |
Issue |
6 |
Pages |
753-764 |
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Keywords |
kin selection, neighbor-modulated fitness, repression of |
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Abstract |
Explaining altruistic cooperation is one of the greatest
challenges faced by sociologists, economists, and evolutionary biologists.
The problem is determining why an individual would carry
out a costly behavior that benefits another. Possible solutions to this
problem include kinship, repeated interactions, and policing. Another
solution that has recently received much attention is the threat
of punishment. However, punishing behavior is often costly for the
punisher, and so it is not immediately clear how costly punishment
could evolve. We use a direct (neighbor-modulated) fitness approach
to analyze when punishment is favored. This methodology reveals
that, contrary to previous suggestions, relatedness between interacting
individuals is not crucial to explaining cooperation through punishment.
In fact, increasing relatedness directly disfavors punishing
behavior. Instead, the crucial factor is a positive correlation between
the punishment strategy of an individual and the cooperation it
receives. This could arise in several ways, such as when facultative
adjustment of behavior leads individuals to cooperate more when
interacting with individuals who are more likely to punish. More
generally, our results provide a clear example of how the fundamental
factor driving the evolution of social traits is a correlation between
social partners and how this can arise for reasons other than genealogical
kinship. |
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University of Edinburgh, West Mains Road, Edinburgh EH9 3JT, |
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refbase @ user @ |
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341 |
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