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Author |
Reboreda, J.C.; Clayton, N.S.; Kacelnik, A. |
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Title |
Species and sex differences in hippocampus size in parasitic and non-parasitic cowbirds |
Type |
Journal Article |
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Year |
1996 |
Publication |
Neuroreport |
Abbreviated Journal |
Neuroreport |
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Volume |
7 |
Issue |
2 |
Pages  |
505-508 |
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Keywords |
Animals; Birds/*physiology; Female; Hippocampus/*anatomy & histology; Male; Nesting Behavior/*physiology; Sex Characteristics; Species Specificity; Telencephalon/anatomy & histology |
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Abstract |
To test the hypothesis that selection for spatial abilities which require birds to locate and to return accurately to host nests has produced an enlarged hippocampus in brood parasites, three species of cowbird were compared. In shiny cowbirds, females search for host nests without the assistance of the male; in screaming cowbirds, males and females inspect hosts' nests together; in bay-winged cowbirds, neither sex searches because this species is not a brood parasite. As predicted, the two parasitic species had a relatively larger hippocampus than the non-parasitic species. There were no sex differences in relative hippocampus size in screaming or bay-winged cowbirds, but female shiny cowbirds had a larger hippocampus than the male. |
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Instituto de Biologia y Medicina Experimental-CONICET, Buenos Aires, Argentina |
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0959-4965 |
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PMID:8730816 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4798 |
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Author |
Wallner, B.; Brem, G.; Muller, M.; Achmann, R. |
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Title |
Fixed nucleotide differences on the Y chromosome indicate clear divergence between Equus przewalskii and Equus caballus |
Type |
Journal Article |
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Year |
2003 |
Publication |
Animal Genetics |
Abbreviated Journal |
Anim Genet |
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Volume |
34 |
Issue |
6 |
Pages |
453-456 |
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Keywords |
Animals; Base Sequence; DNA, Mitochondrial/genetics; Genetic Variation/*genetics; Horses/classification/*genetics; Male; Molecular Sequence Data; Phylogeny; Probability; Species Specificity; Y Chromosome/*genetics |
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Abstract |
The phylogenetic relationship between Equus przewalskii and E. caballus is often a matter of debate. Although these taxa have different chromosome numbers, they do not form monophyletic clades in a phylogenetic tree based on mtDNA sequences. Here we report sequence variation from five newly identified Y chromosome regions of the horse. Two fixed nucleotide differences on the Y chromosome clearly display Przewalski's horse and domestic horse as sister taxa. At both positions the Przewalski's horse haplotype shows the ancestral state, in common with the members of the zebra/ass lineage. We discuss the factors that may have led to the differences in mtDNA and Y-chromosomal observations. |
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Address |
Institut fur Tierzucht und Genetik, Veterinarmedizinische Universitat Wien, Veterinarplatz, Wien, Austria. wallner@i122server.vu-wien.ac.at |
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0268-9146 |
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Notes |
PMID:14687077 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
5038 |
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Author |
Pritchard, J.C.; Barr, A.R.S.; Whay, H.R. |
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Title |
Validity of a behavioural measure of heat stress and a skin tent test for dehydration in working horses and donkeys |
Type |
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Year |
2006 |
Publication |
Equine veterinary journal |
Abbreviated Journal |
Equine Vet J |
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Volume |
38 |
Issue |
5 |
Pages |
433-438 |
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Keywords |
Age Factors; Animal Welfare; Animals; Behavior, Animal/physiology; Body Temperature/*physiology; Body Weight/physiology; Case-Control Studies; Dehydration/diagnosis/pathology/*veterinary; Drinking; *Equidae; Female; Heat Stress Disorders/diagnosis/physiopathology/*veterinary; Horse Diseases/*diagnosis/pathology; Horses; Hypovolemia/diagnosis/physiopathology/veterinary; Male; Osmolar Concentration; Pakistan; Respiration; Skin/*pathology; Species Specificity; Work |
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Abstract |
REASONS FOR PERFORMING STUDY: Dehydration and heat stress are serious welfare issues for equids working in developing countries. There is a lack of any standardised method or validated interpretation of the skin tent test in horses and donkeys. Owners of dehydrated and heat-stressed animals often depend on veterinary examination for identification of these conditions, leading to delays in treatment and unnecessary reliance on external sources to effect welfare improvement. OBJECTIVES: To validate a standardised skin tent test for dehydration and a behavioural measure of heat stress in working equids; and to examine the effect of heat stress and dehydration on tripping and staggering behaviour. METHODS: The study was carried out on 130 working horses and donkeys in Pakistan. Associations between skin tent and blood parameters (packed cell volume [PCV], serum total protein [TP], serum osmolality), clinical parameters, resting and drinking behaviour were examined. Heat stress behaviour (increased respiratory rate and depth, head nodding, flared nostrils, apathy) was observed in conjunction with rectal temperature. Tripping and staggering were assessed using a simple obstacle course. RESULTS: In both species, heat stress behaviour was significantly associated with increased rectal temperature (P<0.001). A positive skin tent test was not significantly associated with PCV or TP, although in donkeys it was significantly associated with lower serum osmolality (P<0.001). More animals age >15 years had a positive skin tent than those in younger age groups (P = 0.037). Very thin horses were more likely to have a positive skin tent than those in thin or moderate condition (P = 0.028). There was no significant correlation between skin tent and tripping or staggering in either species. CONCLUSIONS AND POTENTIAL RELEVANCE: Heat stress behaviour is related to increased body temperature in working horses and donkeys. Owners may use this to make judgements regarding rest and cooling, precluding the need to seek veterinary attention. The skin tent test for dehydration used in this study did not show a significant relationship with PCV or TP. However, the use of blood parameters to validate the skin tent test may be confounded by anaemia, hypoproteinaemia or electrolyte depletion. Alternative methods are needed to confirm or refute the validity of the skin tent test in working equids. |
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Address |
Department of Clinical Veterinary Science, University of Bristol, Langford, UK |
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English |
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ISSN |
0425-1644 |
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Notes |
PMID:16986604 |
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no |
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Call Number |
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Serial |
1784 |
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Author |
Previc, F.H. |
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Title |
Thyroid hormone production in chimpanzees and humans: implications for the origins of human intelligence |
Type |
Journal Article |
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Year |
2002 |
Publication |
American Journal of Physical Anthropology |
Abbreviated Journal |
Am J Phys Anthropol |
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Volume |
118 |
Issue |
4 |
Pages |
402-3; discussion 404-5 |
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Keywords |
Animals; Humans; *Intelligence; Pan troglodytes/*metabolism; Species Specificity; Thyroid Hormones/*biosynthesis |
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Abstract |
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Address |
Northrop Grumman Information Technology, San Antonio, Texas 78228, USA. fred.previc@brooks.af.mil |
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English |
Summary Language |
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Abbreviated Series Title |
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Series Volume |
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ISSN |
0002-9483 |
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Notes |
PMID:12124921 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4108 |
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Author |
Breen, M.; Downs, P.; Irvin, Z.; Bell, K. |
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Title |
Intrageneric amplification of horse microsatellite markers with emphasis on the Przewalski's horse (E. przewalskii) |
Type |
Journal Article |
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Year |
1994 |
Publication |
Animal Genetics |
Abbreviated Journal |
Anim Genet |
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Volume |
25 |
Issue |
6 |
Pages |
401-405 |
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Keywords |
Animals; DNA, Satellite/*genetics; *Gene Amplification; Gene Frequency; *Genetic Markers; Heterozygote; Horses/*genetics; Species Specificity |
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Abstract |
Primer sequences flanking 13 microsatellite loci isolated from the domestic horse (E. caballus) were successfully used to amplify homologous loci in the Przewalski's horse (E. przewalskii). The results demonstrate that the level of polymorphism at all 13 loci in the Przewalski's horse was comparable to that in the domestic horse and the overall exclusion probability in the Przewalski's horse was calculated to be 0.9994. The results suggest that it should be possible to use E. caballus-derived microsatellite markers to provide parentage verification and additional valuable information to the captive management of E. przewalskii. The ability to amplify corresponding loci in the remaining five species of the genus was also confirmed, illustrating the general application of markers isolated from the domestic horse to the evaluation of polymorphism in the other six species of the genus. |
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Address |
Australian Equine Blood Typing Research Laboratory, University of Queensland, St Lucia |
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English |
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ISSN |
0268-9146 |
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Notes |
PMID:7695120 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2246 |
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Author |
Lemasson, J.J.; Fontenille, D.; Lochouarn, L.; Dia, I.; Simard, F.; Ba, K.; Diop, A.; Diatta, M.; Molez, J.F. |
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Title |
Comparison of behavior and vector efficiency of Anopheles gambiae and An. arabiensis (Diptera:Culicidae) in Barkedji, a Sahelian area of Senegal |
Type |
Journal Article |
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Year |
1997 |
Publication |
Journal of Medical Entomology |
Abbreviated Journal |
J Med Entomol |
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Volume |
34 |
Issue |
4 |
Pages |
396-403 |
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Keywords |
Animals; Anopheles/*parasitology; *Behavior, Animal; Cattle; Desert Climate; Horses/parasitology; Humans; Insect Vectors/*parasitology; Longitudinal Studies; Malaria/*transmission; Malaria, Falciparum/transmission; Periodicity; Plasmodium malariae/isolation & purification; Protozoan Proteins/analysis; Rain; Seasons; Senegal; Sheep/parasitology; Species Specificity |
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Abstract |
The ecology, population dynamics, and malaria vector efficiency of Anopheles gambiae and An. arabiensis were studied for 2 yr in a Sahelian village of Senegal. Anophelines were captured at human bait and resting indoors by pyrethrum spray. Mosquitoes belonging to the An. gambiae complex were identified by polymerase chain reaction. Of 26,973 females, An. arabiensis represented 79% of the mosquitoes captured and remained in the study area longer than An. gambiae after the rains terminated. There were no differences in nocturnal biting cycles or endophagous rates between An. gambiae and An. arabiensis. Based on an enzyme-linked immunosorbent assay test of bloodmeals, the anthropophilic rate of these 2 vectors were both approximately 60%, when comparisons were made during the same period. Overall, 18% of the resting females had patent mixed bloodmeals, mainly human-bovine. The parity rates of An. gambiae and An. arabiensis varied temporally. Despite similar behavior, the Plasmodium falciparum circumsporozoite protein (CSP) rates were different between An. gambiae (4.1%) and An. arabiensis (1.3%). P. malariae and P. ovale only represented 4% of the total Plasmodium identified in mosquitoes. Transmission was seasonal, occurring mainly during 4 mo. The CSP entomological inoculation rates were 128 bites per human per year for the 1st yr and 100 for the 2nd yr. Because of the combination of a high human biting rate and a low CSP rate, An. arabiensis accounted for 63% of transmission. Possible origin of differences in CSP rate between An. gambiae and An. arabiensis is discussed in relation to the parity rate, blood feeding frequency, and the hypothesis of genetic factors. |
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Address |
Institut Francais de Recherche Scientifique pour le Developpement en cooperation (ORSTOM), Institut Pasteur, Dakar, Senegal |
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English |
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ISSN |
0022-2585 |
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Notes |
PMID:9220672 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2655 |
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Author |
Call, J. |
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Title |
Inferences by exclusion in the great apes: the effect of age and species |
Type |
Journal Article |
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Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
9 |
Issue |
4 |
Pages |
393-403 |
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Keywords |
Age Factors; Animals; Association Learning; *Cognition; *Concept Formation; *Discrimination Learning; Female; Gorilla gorilla; Hominidae/classification/*psychology; Male; Pan paniscus; Pan troglodytes; Pongo pygmaeus; *Problem Solving; Species Specificity |
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Abstract |
This study investigated the ability of chimpanzees, gorillas, orangutans, and bonobos to make inferences by exclusion using the procedure pioneered by Premack and Premack (Cognition 50:347-362, 1994) with chimpanzees. Thirty apes were presented with two different food items (banana vs. grape) on a platform and covered with identical containers. One of the items was removed from the container and placed between the two containers so that subjects could see it. After discarding this item, subjects could select between the two containers. In Experiment 1, apes preferentially selected the container that held the item that the experimenter had not discarded, especially if subjects saw the experimenter remove the item from the container (but without seeing the container empty). Experiment 3 in which the food was removed from one of the containers behind a barrier confirmed these results. In contrast, subjects performed at chance levels when a stimulus (colored plastic chip: Exp. 1; food item: Exp. 2 and Exp. 3) designated the item that had been removed. These results indicated that apes made inferences, not just learned to use a discriminative cue to avoid the empty container. Apes perceived and treated the item discarded by the experimenter as if it were the very one that had been hidden under the container. Results suggested a positive relationship between age and inferential ability independent of memory ability but no species differences. |
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Address |
Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103, Leipzig, Germany. call@eva.mpg.de |
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English |
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ISSN |
1435-9448 |
ISBN |
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Notes |
PMID:16924458 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2444 |
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Author |
Gould, J.L. |
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Title |
Animal cognition |
Type |
Journal Article |
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Year |
2004 |
Publication |
Current Biology : CB |
Abbreviated Journal |
Curr Biol |
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Volume |
14 |
Issue |
10 |
Pages |
R372-5 |
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Keywords |
Animals; Awareness; Behavior, Animal/*physiology; Cognition/*physiology; Concept Formation; Decision Making; Instinct; Intelligence/*physiology; Learning/*physiology; Species Specificity |
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Abstract |
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Address |
Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey 08544, USA. gould@princeton.edu |
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English |
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Abbreviated Series Title |
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ISSN |
0960-9822 |
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Notes |
PMID:15186759 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4169 |
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Author |
Howard, R.W.; Blomquist, G.J. |
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Title |
Ecological, behavioral, and biochemical aspects of insect hydrocarbons |
Type |
Journal Article |
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Year |
2005 |
Publication |
Annual Review of Entomology |
Abbreviated Journal |
Annu Rev Entomol |
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Volume |
50 |
Issue |
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Pages |
371-393 |
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Keywords |
Animals; Behavior, Animal/physiology; Hydrocarbons/*metabolism; Insects/*physiology; Pheromones/*physiology; Reproduction; Species Specificity |
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Abstract |
This review covers selected literature from 1982 to the present on some of the ecological, behavioral, and biochemical aspects of hydrocarbon use by insects and other arthropods. Major ecological and behavioral topics are species- and gender-recognition, nestmate recognition, task-specific cues, dominance and fertility cues, chemical mimicry, and primer pheromones. Major biochemical topics include chain length regulation, mechanism of hydrocarbon formation, timing of hydrocarbon synthesis and transport, and biosynthesis of volatile hydrocarbon pheromones of Lepidoptera and Coleoptera. In addition, a section is devoted to future research needs in this rapidly growing area of science. |
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Address |
USDA-ARS, Manhattan, Kansas 66502, USA. howardks@ksu.edu |
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English |
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ISSN |
0066-4170 |
ISBN |
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Notes |
PMID:15355247 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4650 |
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Author |
Hostetter, A.B.; Cantero, M.; Hopkins, W.D. |
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Title |
Differential use of vocal and gestural communication by chimpanzees (Pan troglodytes) in response to the attentional status of a human (Homo sapiens) |
Type |
Journal Article |
| |
Year |
2001 |
Publication |
Journal of Comparative Psychology |
Abbreviated Journal |
J. Comp. Psychol. |
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Volume |
115 |
Issue |
4 |
Pages |
337-343 |
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Keywords |
Animals; *Attention; *Communication Methods, Total; Female; *Gestures; Humans; Male; Motivation; Pan troglodytes/*psychology; Social Environment; Species Specificity; *Vocalization, Animal |
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Abstract |
This study examined the communicative behavior of 49 captive chimpanzees (Pan troglodytes), particularly their use of vocalizations, manual gestures, and other auditory- or tactile-based behaviors as a means of gaining an inattentive audience's attention. A human (Homo sapiens) experimenter held a banana while oriented either toward or away from the chimpanzee. The chimpanzees' behavior was recorded for 60 s. Chimpanzees emitted vocalizations faster and were more likely to produce vocalizations as their 1st communicative behavior when a human was oriented away from them. Chimpanzees used manual gestures more frequently and faster when the human was oriented toward them. These results replicate the findings of earlier studies on chimpanzee gestural communication and provide new information about the intentional and functional use of their vocalizations. |
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Address |
Department of Psychology, Berry College, USA |
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English |
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ISSN |
0735-7036 |
ISBN |
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Notes |
PMID:11824896 |
Approved |
yes |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4970 |
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| Permanent link to this record |
