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| Author | Yamakoshi G; Sugiyama Y | ||||
| Title | Pestle-pounding behavior of wild chimpanzees at Bossou, Guinea: a newly observed tool-using behavior | Type | Journal Article | ||
| Year | 1995 | Publication | Primates | Abbreviated Journal | Primates |
| Volume | 36 | Issue | Pages | 489 | |
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| Call Number | Equine Behaviour @ team @ | Serial | 3052 | ||
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| Author | Visalberghi E; Fragaszy DM; Savage-Rumbaugh ES | ||||
| Title | Performance in a tool-using task by common chimpanzees (Pan troglodytes), bonobos (Pan paniscus), an orangutan (Pongo pygmaeus), and capuchin monkeys (Cebus apella) | Type | Journal Article | ||
| Year | 1995 | Publication | J. Comp. Psychol. | Abbreviated Journal | |
| Volume | 109 | Issue | Pages | 52 | |
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| Call Number | Equine Behaviour @ team @ | Serial | 3077 | ||
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| Author | Anderson B. | ||||
| Title | Dendrites and cognition: A negative pilot study in the rat | Type | Journal Article | ||
| Year | 1995 | Publication | Intelligence | Abbreviated Journal | |
| Volume | 20 | Issue | Pages | 291-308 | |
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| Call Number | refbase @ user @ | Serial | 3453 | ||
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| Author | Laughlin N.K.; Lasky R.E.; Luck M.L.; Kluender K.R.; Hecox K.E. | ||||
| Title | Early lead exposure alters behavioral and electrophysiological indices of auditory processing in the rhesus monkey | Type | Journal Article | ||
| Year | 1995 | Publication | Neurotoxicology and Teratology | Abbreviated Journal | |
| Volume | 17 | Issue | Pages | 374-374 | |
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| Call Number | refbase @ user @ | Serial | 3456 | ||
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| Author | Koenen, E.P.C.; van Veldhuizen, A.E.; Brascamp, E.W. | ||||
| Title | Genetic parameters of linear scored conformation traits and their relation to dressage and show-jumping performance in the Dutch Warmblood Riding Horse population | Type | Journal Article | ||
| Year | 1995 | Publication | Livestock Production Science | Abbreviated Journal | |
| Volume | 43 | Issue | 1 | Pages | 85-94 |
| Keywords | Horse; Heritability; Conformation; Dressage; Show jumping | ||||
| Abstract | In this study genetic parameters of linear scored conformation traits of the Dutch Warmblood Riding Horse were estimated in relation to performance in competition. Observations on 10 665 mares were analyzed with an animal model including the fixed effects age, classifier, location and percentage of thoroughbred. Using restricted maximum likelihood algorithms, heritabilities of 26 linear scored conformation traits were estimated in the range 0.09-0.28. Several conformation traits had high up to very high mutual genetic correlations. Competition results of 3476 horses with performance in dressage and 3220 horses with performance in show-jumping were linked to the conformation data to estimate the genetic relationship between conformation and performance in competition. The model for the evaluation of the competition results included the fixed effects riding club, age and sex. Estimated heritabilities for dressage and show-jumping were 0.17 +/- 0.05 and 0.19 +/- 0.04, respectively. Genetic correlations between conformation and performance were low to moderate. The length of the neck, length and position of the shoulders, shape and length of croup and muscularity of the haunches had a significant moderate genetic correlation with dressage. Muscularity of the neck, shape of the croup and muscularity of the haunches had a significant genetic correlation with show-jumping. The results indicate that, due to the low genetic correlations with performance traits, indirect selection for performance using conformation results is of limited value. | ||||
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Approved | no | |||
| Call Number | refbase @ user @ | Serial | 3961 | ||
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| Author | Clutton-Brock, J. | ||||
| Title | Origins of the dog: domestication and early history | Type | Book Chapter | ||
| Year | 1995 | Publication | The Domestic Dog: Its Evolution, Behaviour and Interactions with People | Abbreviated Journal | |
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| Publisher | Cambridge University Press | Place of Publication | Cambridge | Editor | Serpell, J.A. |
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Approved | no | |||
| Call Number | Equine Behaviour @ team @ Clutton-Brock1995 | Serial | 6247 | ||
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| Author | VanDierendonck, M.C.; de Vries, H.; Schilder, M.B.H. | ||||
| Title | An Analysis of Dominance, Its Behavioural Parameters and Possible Determinants in a Herd of Icelandic orses in Captivity | Type | Journal Article | ||
| Year | 1995 | Publication | Netherlands Journal of Zoology | Abbreviated Journal | Netherl. J. Zool. |
| Volume | 45 | Issue | 3-4 | Pages | 362-385 |
| Keywords | Dominance; rank order; horses; Icelandic horses. | ||||
| Abstract | Th e applicability of the concept of dominance was investigated in a captive herd of  Icelandic horses and  ponies of diff erent breeds. Eight out of  behaviours possibly related to dominance occurred frequently enough to be investigated in detail. For these eight agonistic behaviours the coverage, the unidirectionality in the exchange, and the degree of transitivity (Landau`s linearity index) were calculated. Four off ensive behaviours, together with avoidance, were suitable for further analysis with regard to dominance. Th e patterns of asymmetries with which these behaviours were exchanged were suffi ciently similar as to justify the application of the dominance concept and to construct a (nearly) linear dominance hierarchy. Th e rank order of the castrated stallions was completely linear, the hierarchy of the mares was almost completely linear. Th e results suggest that off ensive and defensive aggressive behaviours should be treated separately and that the concept of dominance is applicable. However, ritualized formal dominance signals between adult horses appear to be (almost) absent. Th e rank positions of the individuals were correlated with age and residency in the herd but not with height. Middle ranking horses tended to be more frequently in the close vicinity of another horse than high ranking or low ranking horses. Over and above this correlation at the individual level, it was found that pairs of horses close in rank to each other were more often also spatially close to each other. Being in oestrus did not infl uence the dominance relationships between mares. For castrated stallions the rank positions were correlated with the age at which they were castrated. Th is suggests that in male horses experience prior to neutering infl uences the behaviour afterwards. |
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| Language | English | Summary Language | Original Title | ||
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Approved | no | |||
| Call Number | refbase @ user @ | Serial | 440 | ||
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| Author | Dugatkin, L.A.; Hoglund, J. | ||||
| Title | Delayed breeding and the evolution of mate copying in lekking species | Type | Journal Article | ||
| Year | 1995 | Publication | Journal of Theoretical Biology | Abbreviated Journal | J. Theor. Biol. |
| Volume | 174 | Issue | 3 | Pages | 261-267 |
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| Abstract | Recent experimental evidence indicates that females may copy the mate choice of others. Here, we present a model for the evolution of mate copying strategies in lekking species. In the model, all females (copiers and non-copiers) assess male quality, but a copier's assessment of a male's quality increases after males have mated with other females. The model demonstrates that mate copying is favored when breeding late in the season has a relatively high cost. We hope that our results will spur empirical work quantifying the time constraints associated with breeding, thus allowing more direct tests of the model's predictions. | ||||
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Approved | no | |||
| Call Number | refbase @ user @ | Serial | 482 | ||
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| Author | Godin, J.-G.J.; Dugatkin, L.A. | ||||
| Title | Variability and repeatability of female mating preference in the guppy | Type | Journal Article | ||
| Year | 1995 | Publication | Animal Behaviour. | Abbreviated Journal | Anim. Behav. |
| Volume | 49 | Issue | 6 | Pages | 1427-1433 |
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| Abstract | Models of inter-sexual selection generally assume heritable variation in mating preferences among females within populations. However, little is known about the nature of such variation. The aim of this study was to characterize quantitatively the phenotypic variation in female preference for a sexually selected male trait, body colour pattern, within a population of the Trinidadian guppy, Poecilia reticulata. Significantly more female guppies preferred the more brightly coloured of two similar-sized males presented simultaneously as potential mates. Mating preference scores for individual females were significantly and positively correlated between two repeated trials on successive days. Females were thus individually consistent in their particular choice of mates, and the calculated repeatability of their mating preference was relatively high. Notwithstanding the aforementioned, significant variation existed among females in the degree of their preference for brightly coloured males. Individual mating preference scores were not normally distributed, but were rather skewed to the right (i.e. towards greater values). These results suggest that additive genetic variation for mating preferences based on male colour pattern is maintained, and the opportunity for the further evolution of both bright male colour patterns and female preference for this trait appears to exist in the study population from the Quare River, Trinidad. | ||||
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Approved | no | |||
| Call Number | refbase @ user @ | Serial | 492 | ||
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| Author | Coussi-Korbel, S.; Fragaszy, D.M. | ||||
| Title | On the relation between social dynamics and social learning | Type | Journal Article | ||
| Year | 1995 | Publication | Animal Behaviour. | Abbreviated Journal | Anim. Behav. |
| Volume | 50 | Issue | 6 | Pages | 1441-1453 |
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| Abstract | Experimental studies on social learning in animals have commonly centred on the psychological processes responsible for learning, and neglected social processes as potential influences on both the likelihood of social learning and the type of information that can be acquired socially. A model relating social learning to social dynamics among members of a group is presented. Three key hypotheses of the model are (1) behavioural coordination in time and/or space supports the process of social learning; (2) different kinds of coordination differentially support acquisition of different kinds of information; and (3) the various forms of behavioural coordination will be differentially affected by social dynamics. Several predictions relating inter-individual and group differences in social dynamics to social learning that follow from these hypotheses are presented. | ||||
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Approved | no | |||
| Call Number | refbase @ user @ | Serial | 568 | ||
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