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Author |
Mateo, J.M.; Johnston, R.E. |
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Title |
Kin recognition by self-referent phenotype matching: weighing the evidence |
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Journal Article |
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Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
6 |
Issue  |
1 |
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73-76 |
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Animals; Brain/embryology; Cricetinae/embryology; Humans; Learning; Odors; Phenotype; *Recognition (Psychology); Reproducibility of Results; Research Design; *Self Psychology; *Smell |
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Department of Psychology, Cornell University, NY 14853-7601, Ithaca, USA. jmateo@uchicago.edu |
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1435-9448 |
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PMID:12658537 |
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no |
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Equine Behaviour @ team @ |
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2579 |
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Author |
Hauber, M.E.; Sherman, P.W. |
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Title |
Designing and interpreting experimental tests of self-referent phenotype matching |
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Journal Article |
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Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
6 |
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1 |
Pages |
69-71 |
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Animals; Birds; Body Constitution; Color; Humans; Pedigree; *Perception; Phenotype; *Recognition (Psychology); Research Design; *Self Psychology |
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Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853-2702, USA |
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1435-9448 |
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PMID:12658536 |
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no |
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Equine Behaviour @ team @ |
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2580 |
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Kiltie, R.A.; Fan, J.; Laine, A.F. |
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Title |
A wavelet-based metric for visual texture discrimination with applications in evolutionary ecology |
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Journal Article |
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Year |
1995 |
Publication |
Mathematical Biosciences |
Abbreviated Journal |
Math Biosci |
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Volume |
126 |
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1 |
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21-39 |
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Animals; Carnivora; *Ecology; Equidae; *Evolution; Humans; Mathematics; Models, Biological; Moths; *Pattern Recognition, Visual; Pigmentation |
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Much work on natural and sexual selection is concerned with the conspicuousness of visual patterns (textures) on animal and plant surfaces. Previous attempts by evolutionary biologists to quantify apparency of such textures have involved subjective estimates of conspicuousness or statistical analyses based on transect samples. We present a method based on wavelet analysis that avoids subjectivity and that uses more of the information in image textures than transects do. Like the human visual system for texture discrimination, and probably like that of other vertebrates, this method is based on localized analysis of orientation and frequency components of the patterns composing visual textures. As examples of the metric's utility, we present analyses of crypsis for tigers, zebras, and peppered moth morphs. |
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Department of Zoology, University of Florida, Gainesville |
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0025-5564 |
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PMID:7696817 |
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Equine Behaviour @ team @ |
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2660 |
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Author |
Reznikova, Z.I. |
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Title |
[The study of tool use as the way for general estimation of cognitive abilities in animals] |
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Journal Article |
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2006 |
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Zhurnal Obshchei Biologii |
Abbreviated Journal |
Zh Obshch Biol |
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67 |
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1 |
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3-22 |
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Keywords |
Adaptation, Psychological; Animals; *Cognition; Learning; Pattern Recognition, Physiological; Species Specificity |
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Investigation of tool use is an effective way to determine cognitive abilities of animals. This approach raises hypotheses, which delineate limits of animal's competence in understanding of objects properties and interrelations and the influence of individual and social experience on their behaviour. On the basis of brief review of different models of manipulation with objects and tools manufacturing (detaching, subtracting and reshaping) by various animals (from elephants to ants) in natural conditions the experimental data concerning tool usage was considered. Tool behaviour of anumals could be observed rarely and its distribution among different taxons is rather odd. Recent studies have revealed that some species (for instance, bonobos and tamarins) which didn't manipulate tools in wild life appears to be an advanced tool users and even manufacturers in laboratory. Experimental studies of animals tool use include investigation of their ability to use objects physical properties, to categorize objects involved in tool activity by its functional properties, to take forces affecting objects into account, as well as their capacity of planning their actions. The crucial question is whether animals can abstract general principles of relations between objects regardless of the exact circumstances, or they develop specific associations between concerete things and situations. Effectiveness of laboratory methods is estimated in the review basing on comparative studies of tool behaviour, such as “support problem”, “stick problem”, “tube- and tube-trap problem”, and “reserve tube problem”. Levels of social learning, the role of imprinting, and species-specific predisposition to formation of specific domains are discussed. Experimental investigation of tool use allows estimation of the individuals' intelligence in populations. A hypothesis suggesting that strong predisposition to formation of specific associations can serve as a driving force and at the same time as obstacle to animals' activity is discussed. In several “technically gifted” species (such as woodpecker finches, New Caledonian crows, and chimpanzees) tool use seems to be guided by a rapid process of trial and error learning. Individuals that are predisposed to learn specific connections do this too quickly and thus become enslaved by stereotypic solutions of raising problems. |
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Russian |
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0044-4596 |
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PMID:16521567 |
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no |
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Equine Behaviour @ team @ |
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2857 |
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Author |
Sovrano, V.; Bisazza, A. |
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Title |
Recognition of partly occluded objects by fish |
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Journal Article |
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Year |
2008 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
11 |
Issue |
1 |
Pages |
1435-9448 |
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Keywords |
Visual completion – Amodal completion – Occlusion – Visual recognition – Fish |
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Abstract The ability to visually complete partly occluded objects (so-called `“amodal completion”) has been documented in mammals and birds. Here, we report the first evidence of such a perceptual ability in a fish species. Fish (Xenotoca eiseni) were trained to discriminate between a complete and an amputated disk. Thereafter, the fish performed test trials in which hexagonal polygons were either exactly juxtaposed or only placed close to the missing sectors of the disk in order to produce or not produce the impression (to a human observer) of an occlusion of the missing sectors of the disk by the polygon. In another experiment, fish were first trained to discriminate between hexagonal polygons that were either exactly juxtaposed or only placed close to the missing sectors of a disk, and then tested for choice between a complete and an amputated disk. In both experiments, fish behaved as if they were experiencing visual completion of the partly occluded stimuli. These findings suggest that the ability to visually complete partly occluded objects may be widespread among vertebrates, possibly inherited in mammals, birds and fish from early vertebrate ancestors. |
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Admin @ knut @ |
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4217 |
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Bates, L.A.; Sayialel, K.N.; Njiraini, N.W.; Poole, J.H.; Moss, C.J.; Byrne, R.W. |
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Title |
African elephants have expectations about the locations of out-of-sight family members |
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2008 |
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Biology Letters |
Abbreviated Journal |
Biol Lett |
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4 |
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1 |
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34-36 |
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Keywords |
elephants, olfaction, urine, individual recognition |
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Monitoring the location of conspecifics may be important to social mammals. Here, we use an expectancy-violation paradigm to test the ability of African elephants (Loxodonta africana) to keep track of their social companions from olfactory cues. We presented elephants with samples of earth mixed with urine from female conspecifics that were either kin or unrelated to them, and either unexpected or highly predictable at that location. From behavioural measurements of the elephants' reactions, we show that African elephants can recognize up to 17 females and possibly up to 30 family members from cues present in the urine-earth mix, and that they keep track of the location of these individuals in relation to themselves. |
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yes |
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Equine Behaviour @ team @ |
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4332 |
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Author |
Drummond, H. |
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Title |
Dominance in vertebrate broods and litters |
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Journal Article |
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Year |
2006 |
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Quarterly Review of Biology |
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81 |
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1 |
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3-32 |
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Aggression; Assessment; Dominance; Individual recognition; Sibling conflict; Trained losing |
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Drawing on the concepts and theory of dominance in adult vertebrates, this article categorizes the relationships of dominance between infant siblings, identifies the behavioral mechanisms that give rise to those relationships, and proposes a model to explain their evolution. Dominance relationships in avian broods can be classified according to the agonistic roles of dominants and subordinates as “aggression-submission,” “aggression-resistance, ” “aggression-aggression,” “aggression-avoidance,” “rotating dominance,” and “flock dominance.” These relationships differ mainly in the submissiveness/pugnacity of subordinates, which is pivotal, and in the specificity/generality of the learning processes that underlie them. As in the dominance hierarchies of adult vertebrates, agonistic roles are engendered and maintained by several mechanisms, including differential fighting ability, assessment, trained winning and losing (especially in altricial species), learned individual relationships (especially in precocial species), site-specific learning, and probably group-level effects. An evolutionary framework in which the species-typical dominance relationship is determined by feeding mode, confinement, cost of subordination, and capacity for individual recognition, can be extended to mammalian litters and account for the aggression-submission and aggression-resistance observed in distinct populations of spotted hyenas and the “site-specific dominance” (teat ownership) of some pigs, felids, and hyraxes. Little is known about agonism in the litters of other mammals or broods of poikilotherms, but some species of fish and crocodilians have the potential for dominance among broodmates. Copyright © 2006 by The University of Chicago. All rights reserved. |
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Instituto de Ecología, Universidad Nacional Autónoma de México, A.P. 70-275, 04510 D.F., Mexico |
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Cited By (since 1996): 20; Export Date: 23 October 2008; Source: Scopus |
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no |
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Equine Behaviour @ team @ |
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4559 |
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Nakagawa, S.; Waas, J.R. |
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'O sibling, where art thou?' – A review of avian sibling recognition with respect to the mammalian literature |
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2004 |
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Biological Reviews of the Cambridge Philosophical Society |
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79 |
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1 |
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101-119 |
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Birds; Direct familiarisation; Indirect familiarisation; Individual recognition; Kin discrimination; Kin recognition; Mammals; Sibling recognition |
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Avian literature on sibling recognition is rare compared to that developed by mammalian researchers. We compare avian and mammalian research on sibling recognition to identify why avian work is rare, how approaches differ and what avian and mammalian researchers can learn from each other. Three factors: (1) biological differences between birds and mammals, (2) conceptual biases and (3) practical constraints, appear to influence our current understanding. Avian research focuses on colonial species because sibling recognition is considered adaptive where 'mixing potential' of dependent young is high; research on a wider range of species, breeding systems and ecological conditions is now needed. Studies of acoustic recognition cues dominate avian literature; other types of cues (e.g. visual, olfactory) deserve further attention. The effect of gender on avian sibling recognition has yet to be investigated; mammalian work shows that gender can have important influences. Most importantly, many researchers assume that birds recognise siblings through 'direct familiarisation' (commonly known as associative learning or familiarity); future experiments should also incorporate tests for 'indirect familiarisation' (commonly known as phenotype matching). If direct familiarisation proves crucial, avian research should investigate how periods of separation influence sibling discrimination. Mammalian researchers typically interpret sibling recognition in broad functional terms (nepotism, optimal outbreeding); some avian researchers more successfully identify specific and testable adaptive explanations, with greater relevance to natural contexts. We end by reporting exciting discoveries from recent studies of avian sibling recognition that inspire further interest in this topic. |
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Department of Biological Sciences, University Waikato, Private Bag 3105, Hamilton, New Zealand |
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Cited By (since 1996): 9; Export Date: 23 October 2008; Source: Scopus |
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Equine Behaviour @ team @ |
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4567 |
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Arakawa, H.; Arakawa, K.; Blanchard, D.C.; Blanchard, R.J. |
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A new test paradigm for social recognition evidenced by urinary scent marking behavior in C57BL/6J mice |
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Journal Article |
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2008 |
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Behavioural Brain Research |
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Behav. Brain. Res. |
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190 |
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1 |
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97-104 |
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Social recognition; Urine marking; Familiarity; Context recognition; C57BL/6J mice |
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Olfaction is a major sensory element in intraspecies recognition and communication in mice. The present study investigated scent marking behaviors of males of the highly inbred C57BL/6J (C57) strain in order to evaluate the ability of these behaviors to provide clear and consistent measures of social familiarity and response to social signals. C57 males engage in scent marking when placed in a chamber with a wire mesh partition separating them from a conspecific. Male mice (C57 or outbred CD-1 mice) showed rapid habituation of scent marking (decreased marking over trials) with repeated exposure at 24-h intervals, to a stimulus animal of the C57 or CD-1 strains, or to an empty chamber. Subsequent exposure to a genetically different novel mouse (CD-1 after CD-1 exposure, or CD-1 after C57 exposure) or to a novel context (different shaped chamber) produced recovery of marking, while responses to a novel but genetically identical mouse (C57 after C57 exposure) or to the empty chamber did not. This finding demonstrated that male mice differentiate familiar and novel conspecifics as expressed by habituation and recovery of scent marking, but neither C57 or CD-1 mice can differentiate new vs. familiar C57 males; likely due to similarities in their odor patterns. The data also indicate that scent marking can differentiate novel from familiar contexts. |
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Equine Behaviour @ team @ |
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4639 |
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Soproni, K.; Miklósi, Á.; Topál, J.; Csányi, V. |
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Dogs' (Canis familiaris) responsiveness to human pointing gestures |
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Journal Article |
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2002 |
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Journal of Comparative Psychology (Washington, D.C. : 1983) |
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J Comp Psychol |
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116 |
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1 |
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27-34 |
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Analysis of Variance; Animals; *Behavior, Animal; Choice Behavior; Dogs/*psychology; Female; Gestures; Male; *Recognition (Psychology); Species Specificity |
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In a series of 3 experiments, dogs (Canis familiaris) were presented with variations of the human pointing gesture: gestures with reversed direction of movement, cross-pointing, and different arm extensions. Dogs performed at above chance level if they could see the hand (and index finger) protruding from the human body contour. If these minimum requirements were not accessible, dogs still could rely on the body position of the signaler. The direction of movement of the pointing arm did not influence the performance. In summary, these observations suggest that dogs are able to rely on relatively novel gestural forms of the human communicative pointing gesture and that they are able to comprehend to some extent the referential nature of human pointing. |
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Department of Ethology, Eotvos Lorand University, Budapest, Hungary. krisztinasoproni@hotmail.com |
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0735-7036 |
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PMID:11926681 |
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Equine Behaviour @ team @ |
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4962 |
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