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Author | Frank S. A. | ||||
Title | Policing and group cohesion when resources vary. | Type | Journal Article | ||
Year | 1996 | Publication | Animal Behaviour | Abbreviated Journal | Anim. Behav. |
Volume | 52 | Issue | Pages | 1163-1169 | |
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Abstract | The transition from competing individuals to cooperative groups has occurred several times inevolutionary history. The puzzle is why selfish individuals did not subvert cohesive group behaviour bytaking resources without contributing to the group’s overall success. Kin selection and reciprocal altruism are the two standard explanations for group cohesion. But many groups have evolved into cooperative units when relatedness was low and opportunities were limited for the strategic alliances required for reciprocity. A new theory was recently proposed in which individuals invest some of their resources into repressing competition between group members. Such policing increases the fair distribution of resources in the group and enhances group cohesion. The surprising aspect of this theory is that low relatedness is more conducive to the spread of policing traits than is high relatedness. Here a new explanation is developed of the biological processes that favour policing. The model is then extended in two ways. First, more realism is added to the theory by accounting for the full range of costs and benefits associated with competitive and cooperative traits within groups. Second, another surprising result is introduced about cooperative evolution. Small variations in individual vigour or resources can lead to large variations in individual contributions to policing the group. Stronger individuals often invest all of their excess resources into policing, but weaker individuals do not contribute to group cohesion. |
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Call Number | Equine Behaviour @ team @ | Serial | 5429 | ||
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Author | Fulhorst, C.F.; Hardy, J.L.; Eldridge, B.F.; Chiles, R.E.; Reeves, W.C. | ||||
Title | Ecology of Jamestown Canyon virus (Bunyaviridae: California serogroup) in coastal California | Type | Journal Article | ||
Year | 1996 | Publication | The American Journal of Tropical Medicine and Hygiene | Abbreviated Journal | Am J Trop Med Hyg |
Volume | 55 | Issue | 2 | Pages | 185-189 |
Keywords | Aedes/virology; Animals; Antibodies, Viral/blood; California/epidemiology; Cattle; Cattle Diseases/epidemiology; Deer; Dog Diseases/epidemiology; Dogs; Encephalitis Virus, California/immunology/*isolation & purification; Encephalitis, California/epidemiology/*veterinary; Female; Horse Diseases/epidemiology; Horses; Insect Vectors/virology; Lagomorpha; Male; Neutralization Tests/veterinary; Peromyscus; Rodent Diseases/epidemiology; Sigmodontinae | ||||
Abstract | This paper reports the first isolation of Jamestown Canyon (JC) virus from coastal California and the results of tests for antibody to JC virus in mammals living in coastal California. The virus isolation was made from a pool of 50 Aedes dorsalis females collected as adults from Morro Bay, San Luis Obispo County, California. The virus isolate was identified by two-way plaque reduction-serum dilution neutralization tests done in Vero cell cultures. Sera from the mammals were tested for antibody to JC virus by a plaque-reduction serum dilution neutralization method. A high prevalence of JC virus-specific antibody was found in horses and cattle sampled from Morro Bay. This finding is additional evidence for the presence of a virus antigenically identical or closely related to JC virus in Morro Bay and indicates that the vectors of the virus in Morro Bay feed on large mammals. A high prevalence of virus-specific antibody was also found in horses sampled from Marin and San Diego counties. This finding suggests that viruses antigenically identical or closely related to JC virus are geographically widespread in coastal California. | ||||
Address | School of Public Health, University of California, Berkeley, USA | ||||
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Language | English | Summary Language | Original Title | ||
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ISSN | 0002-9637 | ISBN | Medium | ||
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Notes | PMID:8780458 | Approved | no | ||
Call Number | Equine Behaviour @ team @ | Serial | 2656 | ||
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Author | Atwill, E.R.; Mohammed, H.O.; Lopez, J.W. | ||||
Title | Evaluation of travel and use as a risk factor for seropositivity to Ehrlichia risticii in horses of New York state | Type | Journal Article | ||
Year | 1996 | Publication | American Journal of Veterinary Research | Abbreviated Journal | Am J Vet Res |
Volume | 57 | Issue | 3 | Pages | 272-277 |
Keywords | Animals; Cross-Sectional Studies; Ehrlichiosis/epidemiology/*veterinary; Female; *Horse Diseases; Horses; Male; New York/epidemiology; Probability; Random Allocation; Risk Factors; *Travel | ||||
Abstract | OBJECTIVES--To determine whether mean annual frequency and destination of equine travel was associated with exposure to Ehrlichia risticii and whether these associations were modified by horses' place of residence. DESIGN--Cross-sectional study. SAMPLE POPULATION--511 equine operations containing 2,587 horses were visited in New York state from a target population of 39,000 operations. PROCEDURE--Each horse was tested for serum antibodies against E risticii, using indirect fluorescent antibody. Information on the horse's travel history, farm's management practices, and surrounding ecology was obtained by personal interview and resource maps. Statistical analyses were performed on 2 cohorts of animals: all horses enrolled in the study and horses born on the property or that resided at least 4 years on the farm. Three county-based risk regions (RR) were identified by use of cluster analysis. RESULTS--Mean seroprevalence for each of the 3 RR was 2.4 (low risk), 8.5 (moderate risk), and 18.5% (high risk) for cohort 1 and 2.5, 8.0, and 18.4% for cohort 2. Among cohorts 1 and 2, pleasure riding and breeding trips were associated with exposure to E risticii, but horse residence (low, moderate, or high RR) was an effect modifier for these associations. Among cohort 1 and stratifying the analysis according to the RR for the travel destination, trail riding at low RR and trail riding at high RR were associated with exposure. Among cohort 2 and stratifying the analysis according to the RR for the travel destination, breeding trips were associated with exposure, and strong effect modification was present for horse residence (low, moderate, or high RR). CONCLUSIONS--Only certain types of travel to specific RR were associated with higher risk of exposure to E risticii. In many instances, travel was not associated, or was associated, with a reduced risk of exposure. | ||||
Address | Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA | ||||
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Language | English | Summary Language | Original Title | ||
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ISSN | 0002-9645 | ISBN | Medium | ||
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Notes | PMID:8669754 | Approved | no | ||
Call Number | Equine Behaviour @ team @ | Serial | 2658 | ||
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Author | Kaseda, Y.; K. Nozawa, K. | ||||
Title | Father-daughter matings and its avoidance in Misaki feral horses | Type | Journal Article | ||
Year | 1996 | Publication | Animal Science and Technology | Abbreviated Journal | Anim Sci Tech |
Volume | 67 | Issue | 11 | Pages | 996-1002 |
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Abstract | Father-daughter matings and its avoidance mechanism were analysed on the basis of data which gained from behavioural observations and paternity tests in Misaki feral horses from 1979 to 1994. Twelve stallions and their 51 daughters had 176 breeding seasons, but they lived in the different home range in 82 breeding seasons. About half of 1- to 3-year-old mares emigrated from natal area to the other and grew up there. Therefore, emigrations of young mares may result reduction of contacts and avoidance of inbreeding with their fathers. The stallions and their daughters lived in the same area in 94 breeding seasons, but there were no cases that daughters which left their natal harem groups before sexual maturity formed again stable consort relations with their natal harem stallions. It is possible that separation of young mares from their natal groups before sexual maturity may result avoidance of formation of consort relation with their fathers. Two father-daughter matings were observed in 124 paternity tests. These two daughters were born in the other harem groups than their father's and left their natal groups before maturity. After maturity, one of them formed a stable consort relation with her father and the other remained together with her father for 2 months in the breeding season. Both of them had not experience to have lived with their fathers before maturity. The persent result supports the hypothesis in wild and semi-wild horses that inbreedings between fathers and daughters may be avioded by the experience to have lived together before sexual maturity. | ||||
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ISSN | 0918-2365. | ISBN | Medium | ||
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Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ | Serial | 2307 | ||
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Author | Provenza, F.D. | ||||
Title | Acquired aversions as the basis for varied diets of ruminants foraging on rangelands | Type | Journal Article | ||
Year | 1996 | Publication | Journal of Animal Science | Abbreviated Journal | J. Anim Sci. |
Volume | 74 | Issue | 8 | Pages | 2010-2020 |
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Call Number | Equine Behaviour @ team @ | Serial | 2946 | ||
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Author | Boyd, R.; Richerson, P.J. | ||||
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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Publisher | Royal Society/British Academy | Place of Publication | Editor | ||
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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 | Kitchen A; Denton D; Brent L | ||||
Title | Self-recognition and abstraction abilities in the common chimpanzee studied with distorting mirrors | Type | Journal Article | ||
Year | 1996 | Publication | Proc. Natl. Acad. Sci. USA | Abbreviated Journal | |
Volume | 93 | Issue | Pages | 7405 | |
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Call Number | Equine Behaviour @ team @ | Serial | 3011 | ||
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Author | Ballew, R.M.; Sabelko, J.; Gruebele, M. | ||||
Title | Direct observation of fast protein folding: the initial collapse of apomyoglobin | Type | Journal Article | ||
Year | 1996 | Publication | Proceedings of the National Academy of Sciences of the United States of America | Abbreviated Journal | Proc. Natl. Acad. Sci. U.S.A. |
Volume | 93 | Issue | 12 | Pages | 5759-5764 |
Keywords | Animals; Apoproteins/*chemistry; Circular Dichroism; Horses; Kinetics; Muscle, Skeletal/chemistry; Myoglobin/*chemistry; *Protein Folding; Spectrometry, Fluorescence; Spectrophotometry, Infrared; Temperature | ||||
Abstract | The rapid refolding dynamics of apomyoglobin are followed by a new temperature-jump fluorescence technique on a 15-ns to 0.5-ms time scale in vitro. The apparatus measures the protein-folding history in a single sweep in standard aqueous buffers. The earliest steps during folding to a compact state are observed and are complete in under 20 micros. Experiments on mutants and consideration of steady-state CD and fluorescence spectra indicate that the observed microsecond phase monitors assembly of an A x (H x G) helix subunit. Measurements at different viscosities indicate diffusive behavior even at low viscosities, in agreement with motions of a solvent-exposed protein during the initial collapse. | ||||
Address | School of Chemical Sciences and Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, 61801, USA | ||||
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Language | English | Summary Language | Original Title | ||
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ISSN | 0027-8424 | ISBN | Medium | ||
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Notes | PMID:8650166 | Approved | no | ||
Call Number | Equine Behaviour @ team @ | Serial | 3798 | ||
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Author | de Waal, F.B.; Uno, H.; Luttrell, L.M.; Meisner, L.F.; Jeannotte, L.A. | ||||
Title | Behavioral retardation in a macaque with autosomal trisomy and aging mother | Type | Journal Article | ||
Year | 1996 | Publication | American journal of mental retardation : AJMR | Abbreviated Journal | Am J Ment Retard |
Volume | 100 | Issue | 4 | Pages | 378-390 |
Keywords | Animals; *Behavior, Animal; Brain/physiopathology; Female; Hydrocephalus/complications; Longitudinal Studies; Macaca mulatta/*genetics; Magnetic Resonance Imaging; Male; *Maternal Age; Psychomotor Disorders/*etiology; Social Behavior; Trisomy/*genetics; X Chromosome | ||||
Abstract | The social development of a female rhesus monkey (Macaca mulatta) was followed from the day of birth until her death, at age 32 months. The subject, born to an older mother, had an extra autosome (karyotype: 43, XX, +18), an affliction that came about spontaneously. MRI scans revealed that she was also hydrocephalic. Compared to 23 female monkeys growing up under identical conditions, the subject showed serious motor deficiencies, a dramatic delay in the development of social behavior, poorly established dominance relationships, and greater than usual dependency on mother and kin. The subject was well-integrated into the social group, however. | ||||
Address | University of Wisconsin-Madison, USA | ||||
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ISSN | 0895-8017 | ISBN | Medium | ||
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Notes | PMID:8718992 | Approved | no | ||
Call Number | refbase @ user @ | Serial | 205 | ||
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Author | Bermudez, J.L. | ||||
Title | The moral significance of birth | Type | Journal Article | ||
Year | 1996 | Publication | Ethics | Abbreviated Journal | Ethics |
Volume | 106 | Issue | 2 | Pages | 378-403 |
Keywords | Abortion, Induced; Animal Rights; Animals; Beginning of Human Life; Embryonic and Fetal Development; *Ethical Analysis; *Ethics; *Fetus; Homicide; Humans; *Individuality; *Infant, Newborn; Infant, Premature; Infanticide; *Labor, Obstetric; Life; *Personhood; Philosophy; Primates; Psychology; *Self Concept; *Value of Life; Analytical Approach; Genetics and Reproduction; Philosophical Approach | ||||
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ISSN | 0014-1704 | ISBN | Medium | ||
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Notes | PMID:11656645; KIE: 31 fn.; KIE: KIE BoB Subject Heading: fetuses; KIE: KIE BoB Subject Heading: personhood | Approved | no | ||
Call Number | Equine Behaviour @ team @ | Serial | 4177 | ||
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