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	Author	Hopkins, W.D.; Taglialatela, J.P.; Leavens, D.A.
	Title	Chimpanzees differentially produce novel vocalizations to capture the attention of a human			Type	Journal Article
	Year	2007	Publication	Animal Behaviour.	Abbreviated Journal	Anim. Behav.
	Volume	73	Issue	2	Pages	281-286
	Keywords	acoustic signals; chimpanzee; cognition; Pan troglodytes; vocal communication
	Abstract	Chimpanzees, Pan troglodytes, produce numerous species-atypical signals when raised in captivity. We examined contextual elements of the use of two of these vocal signals, the `raspberry' and the extended grunt. Our results demonstrate that these vocalizations are not elicited by the presence of food, but instead function as attention-getting signals. These findings reveal a heretofore underappreciated category of animal signals: attention-getting sounds produced in novel environmental circumstances. The invention and use of species-atypical signals, considered in relation to group differences in signalling repertoires in apes in their natural habitats, may index a generative capacity in these hominoid species without obvious corollary in other primate species.
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	Notes				Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2889
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	Author	Ladewig, J.
	Title	Clever Hans is still whinnying with us			Type	Journal Article
	Year	2007	Publication	Behavioural Processes	Abbreviated Journal	Behav. Process.
	Volume	76	Issue	1	Pages	20-21
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	Notes				Approved	no
	Call Number	refbase @ user @			Serial	631
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	Author	Emery, N.J.; Seed, A.M.; von Bayern, A.M.P.; Clayton, N.S.
	Title	Cognitive adaptations of social bonding in birds			Type	Journal Article
	Year	2007	Publication	Philosophical Transactions of the Royal Society B: Biological Sciences	Abbreviated Journal	Phil. Trans. Biol. Sci.
	Volume	362	Issue	1480	Pages	489-505
	Keywords
	Abstract	The “social intelligence hypothesis” was originally conceived to explain how primates may have evolved their superior intellect and large brains when compared with other animals. Although some birds such as corvids may be intellectually comparable to apes, the same relationship between sociality and brain size seen in primates has not been found for birds, possibly suggesting a role for other non-social factors. But bird sociality is different from primate sociality. Most monkeys and apes form stable groups, whereas most birds are monogamous, and only form large flocks outside of the breeding season. Some birds form lifelong pair bonds and these species tend to have the largest brains relative to body size. Some of these species are known for their intellectual abilities (e.g. corvids and parrots), while others are not (e.g. geese and albatrosses). Although socio-ecological factors may explain some of the differences in brain size and intelligence between corvids/parrots and geese/albatrosses, we predict that the type and quality of the bonded relationship is also critical. Indeed, we present empirical evidence that rook and jackdaw partnerships resemble primate and dolphin alliances. Although social interactions within a pair may seem simple on the surface, we argue that cognition may play an important role in the maintenance of long-term relationships, something we name as “relationship intelligence”.
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	Notes				Approved	no
	Call Number	refbase @ user @			Serial	3528
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	Author	Subiaul, F.; Romansky, K.; Cantlon, J.F.; Klein, T.; Terrace, H.
	Title	Cognitive imitation in 2-year-old children (Homo sapiens): a comparison with rhesus monkeys (Macaca mulatta)			Type	Journal Article
	Year	2007	Publication	Animal Cognition	Abbreviated Journal	Anim. Cogn.
	Volume		Issue		Pages
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	Abstract	Here we compare the performance of 2-year-old human children with that of adult rhesus macaques on a cognitive imitation task. The task was to respond, in a particular order, to arbitrary sets of photographs that were presented simultaneously on a touch sensitive video monitor. Because the spatial position of list items was varied from trial to trial, subjects could not learn this task as a series of specific motor responses. On some lists, subjects with no knowledge of the ordinal position of the items were given the opportunity to learn the order of those items by observing an expert model. Children, like monkeys, learned new lists more rapidly in a social condition where they had the opportunity to observe an experienced model perform the list in question, than under a baseline condition in which they had to learn new lists entirely by trial and error. No differences were observed between the accuracy of each species' responses to individual items or in the frequencies with which they made different types of errors. These results provide clear evidence that monkeys and humans share the ability to imitate novel cognitive rules (cognitive imitation).
	Address	Department of Speech and Hearing Science, The George Washington University, 1922 F Street, NW # 406E, Washington, DC, 20001, USA, subiaul@aol.com
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
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	Series Volume		Series Issue		Edition
	ISSN	1435-9448	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:17287996			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2420
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	Author	Hanggi, E.B.; Ingersoll, J.F.; Waggoner, T.L.
	Title	*Color vision in horses (Equus caballus): deficiencies identified using a pseudoisochromatic plate test*			Type	Journal Article
	Year	2007	Publication	Journal of Comparative Psychology	Abbreviated Journal	J. Comp. Psychol.
	Volume	121	Issue	1	Pages	65-72
	Keywords	Animals; Appetitive Behavior; Color Perception; Color Perception Tests/veterinary; Discrimination Learning; Female; Horses/*psychology; Male; Sensitivity and Specificity
	Abstract	In the past, equine color vision was tested with stimuli composed either of painted cards or photographic slides or through physiological testing using electroretinogram flicker photometry. Some studies produced similar results, but others did not, demonstrating that there was not yet a definitive answer regarding color vision in horses (Equus caballus). In this study, a pseudoisochromatic plate test--which is highly effective in testing color vision both in small children and in adult humans--was used for the first time on a nonhuman animal. Stimuli consisted of different colored dotted circles set against backgrounds of varying dots. The coloration of the circles corresponded to the visual capabilities of different types of color deficiencies (anomalous trichromacy and dichromacy). Four horses were tested on a 2-choice discrimination task. All horses successfully reached criterion for gray circles and demonstration circles. None of the horses were able to discriminate the protan-deutan plate or the individual protan or deutan plates. However, all were able to discriminate the tritan plate. The results suggest that horses are dichromats with color vision capabilities similar to those of humans with red-green color deficiencies.
	Address	Equine Research Foundation, Aptos, CA 95001, USA. EquiResF@aol.com
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0735-7036	ISBN		Medium
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	Notes	PMID:17324076			Approved	no
	Call Number	refbase @ user @ ; Equine Behaviour @ team @ room B 3.029			Serial	1972
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	Author	Roth, L.S.V.; Balkenius, A.; Kelber, A.
	Title	Colour perception in a dichromat			Type	Journal Article
	Year	2007	Publication	Journal of Experimental Biology	Abbreviated Journal
	Volume	210	Issue	16	Pages	2795-2800
	Keywords
	Abstract	Most mammals have dichromatic colour vision based on two different types of cones: a short-wavelength-sensitive cone and a long-wavelength-sensitive cone. Comparing the signal from two cone types gives rise to a one-dimensional chromatic space when brightness is excluded. The so-called `neutral point' refers to the wavelength that the animal cannot distinguish from achromatic light such as white or grey because it stimulates both cone types equally. The question is: how do dichromats perceive their chromatic space? Do they experience a continuous scale of colours or does the neutral point divide their chromatic space into two colour categories, i.e. into colours of either short or long wavelengths?We trained horses to different colour combinations in a two-choice behavioural experiment and tested their responses to the training and test colours. The horses chose colours according to their similarity/relationship to rewarded and unrewarded training colours. There was no evidence for a categorical boundary at the neutral point or elsewhere.This study suggests that dichromats perceive their chromatic space as a continuous scale of colours, treating the colour at the neutral point as any other colour they can distinguish.
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	Notes				Approved	no
	Call Number	Equine Behaviour @ team @			Serial	5711
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	Author	Mills, D.S.
	Title	Comments about the importance of behaviour to equine clinicians			Type	Journal Article
	Year	2007	Publication	Equine Veterinary Journal	Abbreviated Journal	Equine Vet J
	Volume	39	Issue	1	Pages	95
	Keywords	Animals; Behavior, Animal/physiology; Clinical Competence; Horses/physiology; Humans; Veterinarians/psychology; Veterinary Medicine/*standards
	Abstract
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	Language	English	Summary Language		Original Title
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	Series Volume		Series Issue		Edition
	ISSN	0425-1644	ISBN		Medium
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	Notes	PMID:17228604			Approved	no
	Call Number				Serial	1839
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	Author	Voelkl, B.; Huber, L.
	Title	Common marmosets (Callithrix jacchus) do not utilize social information in three simultaneous social foraging tasks			Type	Journal Article
	Year	2007	Publication	Animal Cognition	Abbreviated Journal	Anim. Cogn.
	Volume	10	Issue	2	Pages	149-158
	Keywords	Marmosets – Social foraging – Social information – Food competition
	Abstract	Abstract  Social foraging is suggested to increase foraging efficiency, as individuals might benefit from public information acquired by monitoring the foraging activities of other group members. We conducted a series experiments with captive common marmosets (Callithrix jacchus) to investigate to what extent marmosets utilize social information about food location when foraging simultaneously with conspecifics. Subjects were confronted with dominant and subordinate demonstrators in three experiments which differed in the amount of information about food location available to the demonstrators. In all three experiments, the focal subjects` performance in the social condition was not enhanced in comparison to a non-social control condition. Because we could rule out kleptoparasitism and aggressive displacements as explanations, we argue that the subjects tendency for scramble competition by avoiding others and dispersing over the foraging area seems to inhibit or mask the acquisition of social information about the location of rewarded patches.
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	Notes				Approved	no
	Call Number	Admin @ knut @			Serial	4220
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	Author	Jellinger, K.A.
	Title	Comparative Cognition: Experimental Exploration of Animal Intelligence			Type	Journal Article
	Year	2007	Publication	European Journal of Neurology	Abbreviated Journal
	Volume	14	Issue		Pages	e53-e53
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	Notes				Approved	no
	Call Number	refbase @ user @			Serial	3418
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	Author	Bonin, S.J.; Clayton, H.M.; Lanovaz, J.L.; Johnston, T.
	Title	Comparison of mandibular motion in horses chewing hay and pellets			Type	Journal Article
	Year	2007	Publication	Equine Veterinary Journal	Abbreviated Journal	Equine Vet. J.
	Volume	39	Issue	3	Pages	258-262
	Keywords	horse; temporomandibular joint; mastication; kinematics
	Abstract	Summary Reasons for performing study: Previous studies have suggested that temporomandibular joint (TMJ) kinematics depend on the type of food being masticated, but accurate measurements of TMJ motion in horses chewing different feeds have not been published. Hypothesis: The temporomandibular joint has a larger range of motion when horses chew hay compared to pellets. Methods: An optical motion capture system was used to track skin markers on the skull and mandible of 7 horses as they chewed hay and pellets. A virtual marker was created on the midline between the mandibles at the level of the 4th premolar teeth to represent the overall motion of the mandible relative to the skull during the chewing cycle. Results: Frequency of the chewing cycles was lower for hay than for pellets. Excursions of the virtual mandibular marker were significantly larger in all 3 directions when chewing hay compared to pellets. The mean velocity of the virtual mandibular marker during the chewing cycle was the same when chewing the 2 feeds. Conclusions: The range of mediolateral displacement of the mandible was sufficient to give full occlusal contact of the upper and lower dental arcades when chewing hay but not when chewing pellets. Potential relevance: These findings support the suggestion that horses receiving a diet high in concentrate feeds may require more frequent dental prophylactic examinations and treatments to avoid the development of dental irregularities associated with smaller mandibular excursions during chewing.
	Address
	Corporate Author				Thesis
	Publisher	American Medical Association (AMA)	Place of Publication		Editor
	Language		Summary Language		Original Title
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	Series Volume		Series Issue		Edition
	ISSN	0425-1644	ISBN		Medium
	Area		Expedition		Conference
	Notes	doi: 10.2746/042516407X157792			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	6513
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