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Author |
Gosling, S.D. |
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Title  |
Personality dimensions in spotted hyenas (Crocuta crocuta) |
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Journal Article |
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Year |
1998 |
Publication |
Journal of Comparative Psychology (Washington, D.C. : 1983) |
Abbreviated Journal |
J Comp Psychol |
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Volume |
112 |
Issue |
2 |
Pages |
107-118 |
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Keywords |
Animals; Carnivora/*psychology; Female; Humans; Male; *Personality; Personality Assessment/statistics & numerical data; Psychometrics; Reproducibility of Results; Species Specificity; Temperament |
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Abstract |
Personality ratings of 34 spotted hyenas (Crocuta crocuta) were made by 4 observers who knew the animals well. Analyses suggest that (a) hyena personality traits were rated with generally high reliability; (b) 5 broad dimensions (Assertiveness, Excitability, Human-Directed Agreeableness, Sociability, and Curiosity) captured about 75% of the total variance; (c) this dimensional structure could not be explained in terms of dominance status, sex, age, or appearance; and (d) as expected, female hyenas were more assertive than male hyenas. Comparisons with previous research provide evidence for the cross-species generality of Excitability, Sociability, and especially Assertiveness. Discussion focuses on methodological issues in research on animal personality and on the potential contributions this research can make for understanding the biological and environmental bases of personality. |
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Department of Psychology, University of California, Berkeley 94720-1650, USA. samiam@uclink.berkeley.edu |
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0735-7036 |
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PMID:9642781 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
5019 |
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Author |
Gulotta, M.; Rogatsky, E.; Callender, R.H.; Dyer, R.B. |
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Title |
Primary folding dynamics of sperm whale apomyoglobin: core formation |
Type |
Journal Article |
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Year |
2003 |
Publication |
Biophysical Journal |
Abbreviated Journal |
Biophys J |
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Volume |
84 |
Issue |
3 |
Pages |
1909-1918 |
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Keywords |
Animals; Apoproteins/*chemistry; Crystallography/*methods; Horses; Myocardium/chemistry; Myoglobin/*chemistry; Protein Conformation; *Protein Folding; Species Specificity; Structure-Activity Relationship; Temperature; Whales |
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Abstract |
The structure, thermodynamics, and kinetics of heat-induced unfolding of sperm whale apomyoglobin core formation have been studied. The most rudimentary core is formed at pH(*) 3.0 and up to 60 mM NaCl. Steady state for ultraviolet circular dichroism and fluorescence melting studies indicate that the core in this acid-destabilized state consists of a heterogeneous composition of structures of approximately 26 residues, two-thirds of the number involved for horse heart apomyoglobin under these conditions. Fluorescence temperature-jump relaxation studies show that there is only one process involved in Trp burial. This occurs in 20 micro s for a 7 degrees jump to 52 degrees C, which is close to the limits placed by diffusion on folding reactions. However, infrared temperature jump studies monitoring native helix burial are biexponential with times of 5 micro s and 56 micro s for a similar temperature jump. Both fluorescence and infrared fast phases are energetically favorable but the slow infrared absorbance phase is highly temperature-dependent, indicating a substantial enthalpic barrier for this process. The kinetics are best understood by a multiple-pathway kinetics model. The rapid phases likely represent direct burial of one or both of the Trp residues and parts of the G- and H-helices. We attribute the slow phase to burial and subsequent rearrangement of a misformed core or to a collapse having a high energy barrier wherein both Trps are solvent-exposed. |
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Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA. gulotta@aecom.yu.edu |
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0006-3495 |
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PMID:12609893 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3783 |
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Author |
Santos, L.R.; Pearson, H.M.; Spaepen, G.M.; Tsao, F.; Hauser, M.D. |
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Title |
Probing the limits of tool competence: experiments with two non-tool-using species (Cercopithecus aethiops and Saguinus oedipus) |
Type |
Journal Article |
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Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
9 |
Issue |
2 |
Pages |
94-109 |
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Keywords |
Animals; *Association Learning; Cercopithecus aethiops; *Cognition; Female; *Intelligence; Male; *Motor Skills; *Problem Solving; Saguinus; Species Specificity |
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Abstract |
Non-human animals vary in their ability to make and use tools. The goal of the present study was to further explore what, if anything, differs between tool-users and non-tool-users, and whether these differences lie in the conceptual or motor domain. We tested two species that typically do not use tools-cotton top tamarins (Saguinus oedipus) and vervet monkeys (Cercopithecus aethiops)-on problems that mirrored those designed for prolific tool users such as chimpanzees. We trained subjects on a task in which they could choose one of two canes to obtain an out-of-reach food reward. After training, subjects received several variations on the original task, each designed to examine a specific conceptual aspect of the pulling problem previously studied in other tool-using species. Both species recognized that effective pulling tools must be made of rigid materials. Subsequent conditions revealed significant species differences, with vervets outperforming tamarins across many conditions. Vervets, but not tamarins, had some recognition of the relationship between a tool's orientation and the position of the food reward, the relationship between a tool's trajectory and the substance that it moves on, and that tools must be connected in order to work properly. These results provide further evidence that tool-use may derive from domain-general, rather than domain-specific cognitive capacities that evolved for tool use per se. |
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Department of Psychology, Yale University, Box 208205, New Haven, CT, USA. laurie.santos@yale.edu |
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1435-9448 |
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PMID:16341524 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2478 |
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Author |
Connor, R.J.; Kawaoka, Y.; Webster, R.G.; Paulson, J.C. |
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Title |
Receptor specificity in human, avian, and equine H2 and H3 influenza virus isolates |
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Journal Article |
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Year |
1994 |
Publication |
Virology |
Abbreviated Journal |
Virology |
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Volume |
205 |
Issue |
1 |
Pages |
17-23 |
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Keywords |
Amino Acid Sequence; Amino Acids/genetics; Animals; Carbohydrate Sequence; Chick Embryo; Hemagglutinin Glycoproteins, Influenza Virus; Hemagglutinins, Viral/genetics; Influenza A virus/*metabolism; Molecular Sequence Data; Receptors, Virus/*metabolism; Species Specificity; Viral Envelope Proteins/genetics |
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Abstract |
The receptor specificity of 56 H2 and H3 influenza virus isolates from various animal species has been determined to test the relevance of receptor specificity to the ecology of influenza virus. The results show that the receptor specificity of both H2 and H3 isolates evaluated for sialic acid linkage specificity and inhibition of hemagglutination by horse serum correlates with the species of origin, as postulated earlier for H3 strains based on a limited survey of five human, three avian, and one equine strain. Elucidation of the amino acid sequence of several human H2 receptor variants and analysis of known sequences of H2 and H3 isolates revealed that receptor specificity varies in association with an amino acid change at residues 228 in addition to the change at residue 226 previously documented to affect receptor specificity of H3 but not H1 isolates. Residues 226 and 228 are leucine and serine in human isolates, which preferentially bind sialic acid alpha 2,6-galactose beta 1,4-N-acetyl glucosamine (SA alpha 2,6Gal), and glutamine and glycine in avian and equine isolates, which exhibit specificity for sialic acid alpha-2,3-galactose beta-1,3-N-acetyl galactosamine (SA alpha 2,3Gal). The results demonstrate that the correlation of receptor specificity and species of origin is maintained across both H2 and H3 influenza virus serotypes and provide compelling evidence that influenza virus hosts exert selective pressure to maintain the receptor specificity characteristics of strains isolated from that species. |
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Department of Biological Chemistry, UCLA School of Medicine 90024-1737 |
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0042-6822 |
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PMID:7975212 |
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no |
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Equine Behaviour @ team @ |
Serial |
2662 |
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Author |
Parr, L.A.; Winslow, J.T.; Hopkins, W.D.; de Waal, F.B. |
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Title |
Recognizing facial cues: individual discrimination by chimpanzees (Pan troglodytes) and rhesus monkeys (Macaca mulatta) |
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Journal Article |
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Year |
2000 |
Publication |
Journal of comparative psychology (Washington, D.C. : 1983) |
Abbreviated Journal |
J Comp Psychol |
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Volume |
114 |
Issue |
1 |
Pages |
47-60 |
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Keywords |
Animals; *Discrimination Learning; *Facial Expression; Female; Macaca mulatta/*psychology; Male; Mental Recall; Pan troglodytes/*psychology; Perceptual Masking; *Social Perception; Species Specificity |
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Abstract |
Faces are one of the most salient classes of stimuli involved in social communication. Three experiments compared face-recognition abilities in chimpanzees (Pan troglodytes) and rhesus monkeys (Macaca mulatta). In the face-matching task, the chimpanzees matched identical photographs of conspecifics' faces on Trial 1, and the rhesus monkeys did the same after 4 generalization trials. In the individual-recognition task, the chimpanzees matched 2 different photographs of the same individual after 2 trials, and the rhesus monkeys generalized in fewer than 6 trials. The feature-masking task showed that the eyes were the most important cue for individual recognition. Thus, chimpanzees and rhesus monkeys are able to use facial cues to discriminate unfamiliar conspecifics. Although the rhesus monkeys required many trials to learn the tasks, this is not evidence that faces are not as important social stimuli for them as for the chimpanzees. |
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Department of Psychology, Emory University. parr@rmy.emory.edu |
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0735-7036 |
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PMID:10739311 |
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no |
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Call Number |
refbase @ user @ |
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191 |
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Author |
Santos, L.R.; Miller, C.T.; Hauser, M.D. |
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Title |
Representing tools: how two non-human primate species distinguish between the functionally relevant and irrelevant features of a tool |
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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 |
4 |
Pages |
269-281 |
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Keywords |
Animals; *Discrimination Learning; Female; Form Perception/*physiology; Habituation, Psychophysiologic/*physiology; Imitative Behavior; Macaca mulatta/*growth & development/*psychology; Male; Motor Skills; Practice (Psychology); Saguinus/*growth & development/*psychology; Species Specificity |
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Abstract |
Few studies have examined whether non-human tool-users understand the properties that are relevant for a tool's function. We tested cotton-top tamarins (Saguinus oedipus) and rhesus macaques (Macaca mulatta) on an expectancy violation procedure designed to assess whether these species make distinctions between the functionally relevant and irrelevant features of a tool. Subjects watched an experimenter use a tool to push a grape down a ramp, and then were presented with different displays in which the features of the original tool (shape, color, orientation) were selectively varied. Results indicated that both species looked longer when a newly shaped stick acted on the grape than when a newly colored stick performed the same action, suggesting that both species perceive shape as a more salient transformation than color. In contrast, tamarins, but not rhesus, attended to changes in the tool's orientation. We propose that some non-human primates begin with a predisposition to attend to a tool's shape and, with sufficient experience, develop a more sophisticated understanding of the features that are functionally relevant to tools. |
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Department of Psychology, Harvard University, Cambridge, MA 02138, USA. laurie.santos@yale.edu |
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1435-9448 |
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PMID:12736800 |
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Equine Behaviour @ team @ |
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2570 |
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Author |
Blazyczek, I.; Hamann, H.; Deegen, E.; Distl, O.; Ohnesorge, B. |
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Title |
Retrospective analysis of 50 cases of guttural pouch tympany in foals |
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Journal Article |
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Year |
2004 |
Publication |
The Veterinary Record |
Abbreviated Journal |
Vet. Rec. |
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154 |
Issue |
9 |
Pages |
261-264 |
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Keywords |
Animals; Female; Germany/epidemiology; Horse Diseases/*surgery; Horses; Male; Pharyngeal Diseases/epidemiology/surgery/*veterinary; Retrospective Studies; Severity of Illness Index; Species Specificity |
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Abstract |
Between 1994 and 2001, guttural pouch tympany was diagnosed in 51 foals; there were approximately three times as many fillies as colts, of Arabian, different German warmblood breeds and Western horse breeds. There were significantly more Arabian and paint horse foals than expected in comparison with the breed distribution of the foals hospitalised at the Clinic for Horses. The foals' breed and sex did not influence the age of onset, the type and severity of the clinical signs or the recurrence rate. A surgical laser technique was used on 50 of the foals; in 35 cases only one surgical treatment was necessary, in seven cases a second operation was required during the foal's initial period of hospitalisation, and in eight cases a second operation was performed during a second period of hospitalisation. Long-term follow-up information was obtained for 44 of the 50 treated horses; 24 of them were under two years of age and 20 were over two years of age. In six horses, no follow-up information was available. Four horses were euthanased for reasons unrelated to the condition or its treatment. The horses over two years of age were in training or were being used for competitions in dressage or jumping or for breeding purposes, and in only one of them was an adventitious respiratory noise reported. All the horses up to two years of age were reported to be healthy. |
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Institute of Animal Breeding and Genetics, School of Veterinary Medicine Hannover, Buenteweg 17p, D-30559 Hannover, Germany |
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0042-4900 |
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PMID:15029964 |
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no |
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Equine Behaviour @ team @ |
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3719 |
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Author |
Barros, A.T. |
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Title |
Seasonality and relative abundance of Tabanidae (Diptera) captured on horses in the Pantanal, Brazil |
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Journal Article |
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Year |
2001 |
Publication |
Memorias do Instituto Oswaldo Cruz |
Abbreviated Journal |
Mem Inst Oswaldo Cruz |
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Volume |
96 |
Issue |
7 |
Pages |
917-923 |
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Animals; Brazil; Climate; Diptera/classification/*physiology; Ecology; Horses/*parasitology; Population Dynamics; Seasons; Species Specificity |
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Abstract |
Once a month, from June 1992 to May 1993, collections of tabanids on horse were conducted in the Nhecolandia, Pantanal State of Mato Grosso do Sul, Brazil. Tabanid catches using hand nets were conducted from sunrise to sunset at grassland and cerradao (dense savanna) habitats. A total of 3,442 tabanids from 21 species,12 genera, and 3 subfamilies were collected. Although species abundance varied seasonally depending on habitat, no habitat specificity was observed for the most abundant species. In the grassland, 1,625 (47.2%) tabanids belonging to 19 species were collected, while 1,817 (52.8%) tabanids from 17 species were caught in the cerradao. The number of tabanid species varied from 7 during winter (July/August) to 15 in the spring (October). Tabanus importunus (56%) was the most abundant species, followed by T. occidentalis (8.2%), and T. claripennis (8.1%). The tabanid peak, in October, coincided with the beginning of the rainy season. The population peak of most species, including those with higher vector potential, suggests that the rainy season can be considered as the period of potentially higher risk of mechanical transmission of pathogens by tabanids to horses in the region. |
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Embrapa Pantanal, 79320-900 Corumba, MS, Brasil. thadeu@cpap.embrapa.br |
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0074-0276 |
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PMID:11685255 |
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Equine Behaviour @ team @ |
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2644 |
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Author |
Salzen, E.A.; Cornell, J.M. |
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Title |
Self-perception and species recognition in birds |
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Journal Article |
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Year |
1968 |
Publication |
Behaviour |
Abbreviated Journal |
Behaviour |
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30 |
Issue |
1 |
Pages |
44-65 |
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Keywords |
Animals; Birds; Color Perception; Discrimination Learning; Generalization, Response; Imprinting (Psychology); *Perception; *Self Concept; Social Isolation; *Species Specificity; Water |
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0005-7959 |
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PMID:5644775 |
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Equine Behaviour @ team @ |
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4154 |
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Author |
Hauser, M.D.; Kralik, J.; Botto-Mahan, C.; Garrett, M.; Oser, J. |
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Title |
Self-recognition in primates: phylogeny and the salience of species-typical features |
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Journal Article |
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Year |
1995 |
Publication |
Proceedings of the National Academy of Sciences of the United States of America |
Abbreviated Journal |
Proc. Natl. Acad. Sci. U.S.A. |
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Volume |
92 |
Issue |
23 |
Pages |
10811-10814 |
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Keywords |
Animals; *Behavior, Animal; *Cognition; Discrimination (Psychology); Exploratory Behavior; Female; Hair Color; Male; Phylogeny; Psychology, Comparative; Research Design; Saguinus/*psychology; *Self Concept; Species Specificity; Touch; *Visual Perception |
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Self-recognition has been explored in nonlinguistic organisms by recording whether individuals touch a dye-marked area on visually inaccessible parts of their face while looking in a mirror or inspect parts of their body while using the mirror's reflection. Only chimpanzees, gorillas, orangutans, and humans over the age of approximately 2 years consistently evidence self-directed mirror-guided behavior without experimenter training. To evaluate the inferred phylogenetic gap between hominoids and other animals, a modified dye-mark test was conducted with cotton-top tamarins (Saguinus oedipus), a New World monkey species. The white hair on the tamarins' head was color-dyed, thereby significantly altering a visually distinctive species-typical feature. Only individuals with dyed hair and prior mirror exposure touched their head while looking in the mirror. They looked longer in the mirror than controls, and some individuals used the mirror to observe visually inaccessible body parts. Prior failures to pass the mirror test may have been due to methodological problems, rather than to phylogenetic differences in the capacity for self-recognition. Specifically, an individual's sensitivity to experimentally modified parts of its body may depend crucially on the relative saliency of the modified part (e.g., face versus hair). Moreover, and in contrast to previous claims, we suggest that the mirror test may not be sufficient for assessing the concept of self or mental state attribution in nonlinguistic organisms. |
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Department of Anthropology, Harvard University, Cambridge, MA 02138, USA |
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0027-8424 |
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PMID:7479889 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2825 |
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