| Records |
| Author |
Zhang, Y.; Cao, Q.S.; Rubenstein, D.I.; Zang, S.; Songer, M.; Leimgruber, P.; Chu, H.; Cao, J.; Li, K.; Hu, D. |
Title  |
Water Use Patterns of Sympatric Przewalski's Horse and Khulan: Interspecific Comparison Reveals Niche Differences |
Type |
Journal Article |
| Year |
2015 |
Publication |
Plos One |
Abbreviated Journal |
Plos One |
| Volume |
10 |
Issue |
7 |
Pages |
e0132094 |
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| Abstract |
Acquiring water is essential for all animals, but doing so is most challenging for desert-living animals. Recently Przewalski's horse has been reintroduced to the desert area in China where the last wild surviving member of the species was seen before it vanished from China in the1960s. Its reintroduction placed it within the range of a close evolutionary relative, the con-generic Khulan. Determining whether or not these two species experience competition and whether or not such competition was responsible for the extinction of Przewalski's horses in the wild over 50 years ago, requires identifying the fundamental and realized niches of both species. We remotely monitored the presence of both species at a variety of water points during the dry season in Kalamaili Nature Reserve, Xinjiang, China. Przewalski's horses drank twice per day mostly during daylight hours at low salinity water sources while Khulans drank mostly at night usually at high salinity water points or those far from human residences. Spatial and temporal differences in water use enables coexistence, but suggest that Przewalski's horses also restrict the actions of Khulan. Such differences in both the fundamental and realized niches were associated with differences in physiological tolerances for saline water and human activity as well as differences in aggression and dominance. |
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Public Library of Science |
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| Call Number |
Equine Behaviour @ team @ |
Serial |
6377 |
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| Author |
Maloiy Gmo, |
| Title |
Water economy of the Somali donkey |
Type |
Journal Article |
| Year |
1970 |
Publication |
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Abbreviated Journal |
Am J Physiol |
| Volume |
219 |
Issue |
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Pages |
1522-1527 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Serial |
1364 |
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| Author |
Western D, |
| Title |
Water availability and its influence on the structure and dynamics of a savannah large mammal community |
Type |
Journal Article |
| Year |
1975 |
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E Afr Wildl J 1 |
| Volume |
3 |
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Pages |
265-288 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Serial |
1704 |
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| Author |
Ottoni, E.B.; de Resende, B.D.; Izar, P. |
| Title |
Watching the best nutcrackers: what capuchin monkeys (Cebus apella) know about others' tool-using skills |
Type |
Journal Article |
| Year |
2005 |
Publication |
Animal cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
8 |
Issue |
4 |
Pages |
215-219 |
| Keywords |
Animals; *Association Learning; Cebus/*psychology; *Feeding Behavior; Female; Male; Nuts; *Problem Solving |
| Abstract |
The present work is part of a decade-long study on the spontaneous use of stones for cracking hard-shelled nuts by a semi-free-ranging group of brown capuchin monkeys (Cebus apella). Nutcracking events are frequently watched by other individuals--usually younger, less proficient, and that are well tolerated to the point of some scrounging being allowed by the nutcracker. Here we report findings showing that the choice of observational targets is an active, non-random process, and that observers seem to have some understanding of the relative proficiency of their group mates, preferentially watching the more skilled nutcrackers, which enhances not only scrounging payoffs, but also social learning opportunities. |
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Laboratory of Cognitive Ethology, Department of Experimental Psychology, Institute of Psychology, University of Sao Paulo, Brazil. ebottoni@usp.br |
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1435-9448 |
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PMID:15719240 |
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no |
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refbase @ user @ |
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355 |
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| Author |
Earley, R.L.; Druen, M.; Alan Dugatkin, L. |
| Title |
Watching fights does not alter a bystander's response towards naive conspecifics in male green swordtail fish, Xiphophorus helleri |
Type |
Journal Article |
| Year |
2005 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
69 |
Issue |
5 |
Pages |
1139-1145 |
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| Abstract |
Bystanders are capable of extracting cues from signalling interactions between others and appear to use information gained via eavesdropping when confronted with the watched individuals. A question that has gained little attention is whether observing fights affects bystander behaviour outside the context of interacting with the watched individuals. Our aim was to determine whether watching fights elicits general changes in bystander aggression levels in Xiphophorus helleri. We manipulated the bystanders' ability to witness encounters using clear, one-way-mirror and opaque partitions. After watching (or not watching) an initial contest, the bystanders were pitted against naive conspecifics instead of the animals they had seen fight. Observing fights did not alter the bystanders' propensity to initiate aggression, escalate, or win against naive individuals, indicating that bystanders do not experience general changes in aggressive behaviour after watching a fight. Earlier work in this species, however, has shown that bystanders respond in predictable ways to individuals they have witnessed winning or losing a fight. Taken together, these data support the notion that bystanders consistently modify their behaviour towards previously watched winners or losers in response to information gained via eavesdropping. We discuss our results in light of some recent work on the behavioural and endocrinological responses triggered by watching fights and suggest that comparative approaches to understanding networking phenomena may be productive. |
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no |
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refbase @ user @ |
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394 |
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| Author |
Johnsson, J.I.; Akerman, A. |
| Title |
Watch and learn: preview of the fighting ability of opponents alters contest behaviour in rainbow trout |
Type |
Journal Article |
| Year |
1998 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
56 |
Issue |
3 |
Pages |
771-776 |
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| Abstract |
The costs associated with initial conflicts could be reduced if animals can assess the fighting ability of possible future opponents by watching their contest success against other individuals. We tested this hypothesis by conducting repeated dyadic dominance trials on size-matched juvenile rainbow trout,Oncorhynchus mykiss. In the first trial a dyadic contest was `observed' by a single fish separated by a transparent divider. In the second trial, the observer was paired against either the `familiar' dominant fish or an unfamiliar dominant fish from the first trial. We predicted that observers should settle conflicts with previewed opponents faster and with less aggression than those with unfamiliar fish. This prediction was supported for observers that lost against a previewed competitor, since these fish reduced their aggression more rapidly than did unfamiliar observers. Familiar observers that won, however, showed a more rapid increase in aggression compared with unfamiliar winning observers. This suggests that, regardless of whether an observer challenges the initial dominant, this `decision' is taken more rapidly in conflicts with preassessed contestants, because of the a priori information about their fighting ability. Since preassessment could save energy and allow effort to be concentrated on contests with a high payoff/probability of winning, selection may favour preview strategies when contest competition over resources is important for fitness. |
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no |
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Equine Behaviour @ team @ |
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2869 |
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| Author |
Linton, M.L. |
| Title |
Washoe the chimpanzee |
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Journal Article |
| Year |
1970 |
Publication |
Science (New York, N.Y.) |
Abbreviated Journal |
Science |
| Volume |
169 |
Issue |
943 |
Pages |
328 |
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Animals; Animals, Newborn; Cognition; Cultural Deprivation; *Hominidae; Humans; Infant; *Language Development; Psychology, Comparative |
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0036-8075 |
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PMID:5450363 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
2849 |
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| Author |
Klingel H, |
| Title |
Was wird aus den Grevy- Zebras? |
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Journal Article |
| Year |
1978 |
Publication |
Sielmanns Tierwelt |
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2 |
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12-19 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1311 |
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| Author |
Groves Cp, |
| Title |
Was the quagga a species or a subspecies? |
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Journal Article |
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Afr Wildl |
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39 |
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106-107 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1131 |
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| Author |
Reichholf J, |
| Title |
Warum sind Zebras gestreift? |
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Journal Article |
| Year |
1983 |
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Abbreviated Journal |
Das Tier |
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3 |
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10-13 |
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from Professor Hans Klingels Equine Reference List |
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no |
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Serial |
1503 |
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