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Author Phillips, K. doi  openurl
  Title Natural conceptual behavior in squirrel monkeys (saimiri sciureus): An experimental investigation Type Journal Article
  Year 1996 Publication Primates Abbreviated Journal Primates  
  Volume 37 Issue 3 Pages 327-332  
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  Abstract Abstract  Natural conceptual discriminations have been tested in many different species, including pigeons and a variety of non-human primates. The ability of four male squirrel monkeys (Saimiri sciureus) to learn and use the natural concept “squirrel monkey” was investigated in this study. After a training phase, subjects were presented with novel stimuli in transfer and test trials. All subjects performed at a rate significantly above chance on the first test trial (p<.001), indicating that squirrel monkeys can utilize natural concepts in the laboratory.  
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  Call Number Equine Behaviour @ team @ Serial 3114  
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Author Sommer, H.; Barz, A.; Lindner, A. openurl 
  Title Testing horses for character and temperament Type Journal Article
  Year 1996 Publication Tierarztliche Umschau Abbreviated Journal Tierärztl. Umschau  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 3567  
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Author Dixon, J.C. openurl 
  Title Pattern discrimination, learning-set and memory in a pony Type Journal Article
  Year 1996 Publication Proceedings of the Paper Presented at the Midwestern ..? Abbreviated Journal  
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  Call Number Equine Behaviour @ team @ Serial 3599  
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Author Poling, A.; Temple, W.; Foster, T.M. url  openurl
  Title The differential outcomes effect: A demonstration in domestic chickens responding under a titrating-delayed-matching-to-sample procedure Type Journal Article
  Year 1996 Publication Behavioural Processes Abbreviated Journal Behav. Process.  
  Volume 36 Issue 2 Pages 109-115  
  Keywords Domestic hen; Titrating-delayed-matching-to-sample procedure; Differential outcomes effect; Conditional discrimination; Animal welfare  
  Abstract The differential outcomes effect refers to the increase in speed of acquisition or terminal accuracy that occurs in discrimination training when each of two or more discriminative stimuli is correlated with a different outcome (e.g. type of reinforcer). The present study demonstrated this effect in domestic hens exposed to a titrating-delayed-matching-to-sample procedure, under which correct responses increased (and incorrect responses decreased) the delay between the offset of a sample stimulus and the onset of two comparison stimuli. Colors of key illumination (red, green) were used as sample and comparison stimuli and correct responses resulted in 1- or 4-s food deliveries. When 1-s food deliveries consistently followed correct responses to one key color and 4-s food deliveries followed correct responses to the other key color, the maximum delay reached by the hens and their overall accuracy was significantly higher than when 1- and 4-s food deliveries were randomly arranged following correct responses to both key colors. These data constitute the first demonstration of the differential outcomes effect in chickens, and in any species evaluated under a titrating-delayed-matching-to-sample procedure.  
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  Call Number Equine Behaviour @ team @ Serial 3604  
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Author Mal, M.E.; McCall ,C.A. doi  openurl
  Title The influence of handling during different ages on a halter training test in foals Type Journal Article
  Year 1996 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 5 Issue 2 Pages 115-120  
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  Abstract Ten foals were used to determine effects of handling during different ages on their ability to perform a halter training test. Early-handled (EH) foals (n = 5) were handled in 10 min sessions 5 d weekly from 24 h after birth until 42 d of age, then were not handled from 43 to 84 d of age. Later-handled (LH) foals (n = 5) were not handled from birth to 42 d of age, then were handled in 10-min sessions 5 d weekly from 43 to 84 d of age. At 85 d of age, each foal was subjected to a 10 min halter training test for 5 consecutive d. The test consisted of an unfamiliar handler placing a halter on each foal and attempting to make the foal walk forward for 20 m. Data recorded during each d of the halter training were duration of initial struggle, number of lunges into the air, time to first forward step, time to five consecutive forward steps, and time to travel 20 m. At the end of the 5 d halter training test, the handler assigned a subjective test rating score to each foal based on ease of training. Split-plot analysis indicated that EH foals took less time (P < 0.05) to take one step forward, five consecutive steps forward, and to travel 20 m than LH foals. One-way ANOVA indicated that EH foals had a lower (more desirable) test ratings than LH foals (P < 0.01). Results indicate that handling throughout the first 42 d of life increased foal performance on this halter training task compared to handling from 43 to 84 d of age. These results may imply the existence of a critical handling period during the first 42 d of age or a phenomenon similar to learned helplessness  
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  Call Number Equine Behaviour @ team @ http://www.ag.auburn.edu/ansc/ResPrograms/influ_age.html Serial 3665  
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Author Palme, R.; Fischer, P.; Schildorfer, H.; Ismail, M.N. url  openurl
  Title Excretion of infused 14C-steroid hormones via faeces and urine in domestic livestock Type Journal Article
  Year 1996 Publication Animal Reproduction Science Abbreviated Journal  
  Volume 43 Issue 1 Pages 43-63  
  Keywords Sheep--endocrinology; Pig--endocrinology; Pony; 14C-steroids; Faeces; Urine; Blood  
  Abstract The aim of this comparative study was to gain more information about the excretion of steroid hormones in farm animals. This should help to establish or improve non-invasive steroid monitoring procedures, especially in zoo and wildlife animals. Over a period of 4 h the 14C-steroid hormones (3.7 MBq) progesterone (three females), testosterone (three males), cortisol and oestrone (two males, two females) were infused intravenously in sheep, ponies and pigs. Faeces were collected immediately after defecation. Urine was sampled via a permanent catheter in females and after spontaneous urination in males. A total of 88 +/- 10% (mean +/- SD) of the administered radioactivity was recovered. Considerable interspecies differences were measured both in the amounts of steroid metabolites excreted via faeces or urine and the time course of excretion. Progesterone and oestrone in ewes, and progesterone in mares were excreted mainly in the faeces (over 75%). The primary route of excretion of all other 14C-steroids was via the urine but to a different extent. In general, sheep showed the highest degree of faecal excretion and pigs the least. The highest radioactivity in urine (per mmol creatinine) was observed during the infusion or in one of the next two samples thereafter, whereas in faeces it was measured about 12 h (sheep), 24 h (ponies) or 48 h (pigs) after the end of the infusion. Thereafter the radioactivity declined and reached background levels within 2-3 weeks. In faeces, steroid metabolites were present mainly in an unconjugated form, but in blood and urine as conjugates. Mean retention time of faecal radioactivity suggested that the passage rate of digesta (duodenum to rectum) played an important role in the time course of the excretion of steroids. The information derived from this investigation could improve the precision of sampling as well as the extraction of steroids from the faeces. Furthermore, the study demonstrates that it should be possible to establish methods for measuring faecal androgen and cortisol metabolites for assessing male reproductive endocrinology and stress in animals.  
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  Call Number Equine Behaviour @ team @ Serial 4069  
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Author Laland, K. N.; Richerson, P. J.; Boyd, R. openurl 
  Title Developing a theory of animal social learning. Type Book Chapter
  Year 1996 Publication Social learning in animals: the roots of culture. Abbreviated Journal  
  Volume Issue Pages 129-154  
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  Publisher Academic Press Place of Publication San Diego, California Editor Heyes, C. M.;Galef,B. G. J.  
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  Call Number Equine Behaviour @ team @ home Serial 4093  
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Author Boyd, R.; Richerson, P.J. url  openurl
  Title Why Culture is Common, but Cultural Evolution is Rare Type Journal Article
  Year 1996 Publication Proceedings of the British Academy Abbreviated Journal Proc Br Acad  
  Volume 88 Issue Pages 73-93  
  Keywords cultural distributed evolution primates  
  Abstract If culture is defined as variation acquired and maintained by social learning, then culture is common in nature. However, cumulative cultural evolution resulting in behaviors that no individual could invent on their own is limited to humans, song birds, and perhaps chimpanzees. Circumstantial evidence suggests that cumulative cultural evolution requires the capacity for observational learning. Here, we analyze two models the evolution of psychological capacities that allow cumulative cultural evolution. Both models suggest that the conditions which allow the evolution of such capacities when rare are much more stringent than the conditions which allow the maintenance of the capacities when common. This result follows from the fact that the assumed benefit of the capacities, cumulative cultural adaptation, cannot occur when the capacities are rare. These results suggest why such capacities may be rare in nature.  
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  Notes http://www.proc.britac.ac.uk/cgi-bin/somsid.cgi?page=summaries/pba88#boyd Approved no  
  Call Number Equine Behaviour @ team @ Serial 4195  
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Author Templeton, J.J.; Giraldeau, L.-A. url  doi
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  Title Vicarious sampling: the use of personal and public information by starlings foraging in a simple patchy environment Type Journal Article
  Year 1996 Publication Behavioral Ecology and Sociobiology Abbreviated Journal Behav. Ecol. Sociobiol.  
  Volume 38 Issue 2 Pages 105-114  
  Keywords Social foraging ? Patch sampling ? Public information ? Sturnidae  
  Abstract Group foragers may be able to assess patch quality more efficiently by paying attention to the sampling activities of conspecifics foraging in the same patch. In a previous field experiment, we showed that starlings foraging on patches of hidden food could use the successful foraging activities of others to help them assess patch quality. In order to determine whether a starling could also use another individual's lack of foraging success to assess and depart from empty patches more quickly, we carried out two experimental studies which compared the behaviour of captive starlings sampling artificial patches both when alone and when in pairs. Solitary starlings were first trained to assess patch quality in our experimental two-patch system, and were then tested on an empty patch both alone and with two types of partner bird. One partner sampled very few holes and thus provided a low amount of public information; the other sampled numerous holes and thus provided a high amount of public information. In experiment 1, we found no evidence of vicarious sampling. Subjects sampled a similar number of empty holes when alone as when with the low and high information partners; thus they continued to rely on their own personal information to make their patch departure decisions. In experiment 2, we modified the experimental patches, increasing the ease with which a bird could watch another's sampling activities, and increasing the difficulty of acquiring accurate personal sampling information. This time, subjects apparently did use public information, sampling fewer empty holes before departure when with the high-information partner than when with the low-information partner, and sampling fewer holes when with the low-information partner than when alone. We suggest that the degree to which personal and public information are used is likely to depend both on a forager's ability to remember where it has already sampled and on the type of environment in which foraging takes place.  
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  Call Number Equine Behaviour @ team @ Serial 4198  
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Author Lebelt, D.; Schönreiter, S.; Zanella, A. J. openurl 
  Title Salivary cortisol in stallions: the relationship with plasma levels, daytime profile and changes in response to semen collection Type Journal Article
  Year 1996 Publication Pferdeheilkunde Abbreviated Journal Pferdeheilkunde  
  Volume 14 Issue 4 Pages 411-414  
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  Call Number Equine Behaviour @ team @ Serial 4282  
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