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| Author |
Dugatkin, L.A.; Godin, G.J. |
| Title |
Predator inspection, shoaling and foraging under predation hazard in the Trinidadian guppy,Poecilia reticulata |
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Journal Article |
| Year |
1992 |
Publication |
Environmental Biology of Fishes |
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| Volume |
34 |
Issue |
3 |
Pages |
265-276 |
| Keywords |
Antipredation – Social group – Feeding – Predation risk – Trade-off – Fish |
| Abstract |
Guppies,Poecilia reticulata, living in stream pools in Trinidad, West Indies, approached a potential fish predator (a cichlid fish model) in a tentative, saltatory manner, mainly as singletons or in pairs. Such behavior is referred to as predator inspection behavior. Inspectors approached the trunk and tail of the predator model more frequently, more closely and in larger groups than they approached the predator's head, which is presumably the most dangerous area around the predator. However, guppies were not observed in significantly larger shoals in the stream when the predator model was present. In a stream enclosure, guppies inspected the predator model more frequently when it was stationary compared to when it was moving, and made closer inspections to the posterior regions of the predator than to its head. Therefore, the guppies apparently regarded the predator model as a potential threat and modified their behavior accordingly when inspecting it. Guppies exhibited a lower feeding rate in the presence of the predator, suggesting a trade-off between foraging gains and safety against predation. Our results further suggest that predator inspection behavior may account for some of this reduction in foraging. These findings are discussed in the context of the benefits and costs of predator inspection behavior. |
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Equine Behaviour @ team @ |
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2176 |
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| Author |
Dugatkin, L.A.; Godin, J.-G.J. |
| Title |
Female mate copying in the guppy (Poecilia reticulata): age-dependent effects |
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Journal Article |
| Year |
1993 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
Behav. Ecol. |
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4 |
Issue |
4 |
Pages |
289-292 |
| Keywords |
mate choice, copying, guppy, Poecilia reticulata |
| Abstract |
Virtually all studies of mate choice to date have assumed that females choose mates independent of one another. Social cues, however, such as the mate choice of conspecifics, may also play an important role in such decisions. Previous work has shown that female guppies of similar age copy each other's choice of mates. Here we examine the effect of relative age on mate choice copying in the guppy, Poecilia reticulata, and examine whether younger individuals are more likely to copy the mate choice of older conspecifics than vice versa. Results indicate that younger females copy the mate choice of older females, but older individuals do not appear to be influenced by the mate choice of younger individuals. |
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Equine Behaviour @ team @ |
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2181 |
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Syme, G.J.; Pollard, J.S.; Syme, L.A.; Reid, R.M. |
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An analysis of the limited access measure of social dominance in rats |
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Journal Article |
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1974 |
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22 |
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2 |
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486-500 |
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The limited access situation in which only one of two or more subjects can gain access to a reward during a restricted time-period is an accepted measure of dominance in the rat. This study attempts to validate the technique by establishing the relationship between individual and competitive performance in order to determine whether `priority of access' has been measured. The generality of the competitive orders is examined by altering the competitive response while retaining the same reward. In view of the data collected for both time and weight-gain measures in food and water competition it is doubtful whether the limited access competitive technique can be considered a valid measure of dominance for the laboratory rat. |
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Equine Behaviour @ team @ |
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2187 |
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Syme, G.J. |
| Title |
Competitive orders as measures of social dominance |
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Journal Article |
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1974 |
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22 |
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Part 4 |
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931-940 |
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The use of competitive orders as measures of social dominance is examined, the conclusion being that such use is based on the assumption of the unidimensionality of social dominance. Evidence is presented to show that this is not always the case. Consequently it is suggested that each competitive order must be validated in terms of its measurement of priority of access and response requirements (internal validity) as well as its generality (external validity) before it can be regarded as a dominance measure. Problems of the validity of aggression orders as measures of social dominance are also examined along with their relationship to competitive orders. |
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Equine Behaviour @ team @ |
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2188 |
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Anderson, G.D.; Talbot, L.M. |
| Title |
Soil factors affecting distribution of the grassland types and their utilization by wild animals on the Serengeti Plains |
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Journal Article |
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1965 |
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Journal of Ecology |
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J Ecol |
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53 |
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1 |
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Equine Behaviour @ team @ |
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2216 |
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Anderson, G.D.; Herlocker,D.J. |
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Soil factors affecting the distribution of the vegetation types and their utilization by wild animals in Ngorongoro Crater, Tanzania. |
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1973 |
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Journal of Ecology |
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J Ecol |
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61 |
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627-651 |
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Equine Behaviour @ team @ |
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2217 |
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Bannikov, A.G. |
| Title |
Recent status of the wild ass in Mongolia |
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Journal Article |
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1975 |
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IUCN Bulletin |
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6 |
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4 |
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16 |
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Equine Behaviour @ team @ |
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2219 |
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Vieuille, C.; Berger, F.; Le Pape, G.; Bellanger, D. |
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Sow behaviour involved in the crushing of piglets in outdoor farrowing huts--a brief report |
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Journal Article |
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2003 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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80 |
Issue |
2 |
Pages |
109-115 |
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Pig-maternal behaviour; Crushing; Free-ranging; Welfare |
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This study focuses on maternal activities involved in the trapping of piglets by the sow's body in outdoor farrowing systems and examine the mother-piglet context leading either to the death of piglets or to their survival. The behaviour of six Large-WhitexLandrace sows and their litters was continuously video recorded at their first and second parity, during the 40 h following parturition. Crushing mainly occurred at evening and night, during the first 12 h of farrowing and involved changes between lying, sitting and standing positions, as well as between udder and side lying. No piglet died from savaging. Nevertheless, aggressive behaviours of sows were observed, particularly in their first maternal experience. The immediate context of trapping was related to the labour of the sow and to the feeding and resting of piglets. The immediate crushing context was related to active avoidance of restless piglets while lying down, as well as sitting and standing behaviours. These results are discussed in terms of differential reactions of the sow to suckling attempts of piglets. |
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Equine Behaviour @ team @ |
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2235 |
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Carson, K.; Wood-Gush, D.G.M. |
| Title |
Equine behaviour: I. A review of the literature on social and dam--Foal behaviour |
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Journal Article |
| Year |
1983 |
Publication |
Applied Animal Ethology |
Abbreviated Journal |
Appl. Animal. Ethol. |
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10 |
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3 |
Pages |
165-178 |
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In most cases, the social organisation of each of the seven species of Equidae existing today outside captivity is either territorial or non-territorial. The striking differences found between these two types of organisation in the social grouping and bonds, mating behaviour, leadership and dominance hierarchies of the animals are examined. It is thought that the non-territorial species show a less primitive type of organisation than the territorial animals. Infant Equidae are precocious animals and are able to follow their dams soon after birth. They stay close by their dams and travel with the herd from an early age and are therefore classified as “followers”, in contrast to the species which have a period of hiding after birth. Dams recognise their foals immediately after birth, whereas it takes 2 or 3 days for a foal to form an attachment to its dam. Being in close proximity to their dams, foals are able to nurse frequently and, unless artificially weaned, a foal will nurse until its dam foals again. Foals start to graze during their first week and as they grow older they spend more time grazing and less time nursing and resting. It is normal for foals to be corprophagic until one month old, and this provides them with bacteria essential for the digestion of fibre. Play behaviour is solitary in very young foals, but after 4 weeks of age, foals play together, with male foals playing more than females and showing more aggressive, fighting movements in play. |
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Equine Behaviour @ team @ |
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2253 |
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Castley, J.G.; Knight, M.H. |
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Population status of plains zebra, Equus burchelli, in South African National Parks. |
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1997 |
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Scientific Services, National Parks Board |
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Kimberley, South Africa. |
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Equine Behaviour @ team @ |
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2254 |
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