| Records |
| Author |
Sprigge, T.L.S. |
| Title |
Darwinian Dominion: Animal Welfare and Human Interests: Lewis Petrinovich, Cambridge, Mass, London, England, MIT Press, 1999, ix + 431 pages, {pound}31.50 (hc) |
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Journal Article |
| Year |
2000 |
Publication |
J. Med. Ethics |
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26 |
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5 |
Pages |
412- |
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10.1136/jme.26.5.412 |
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Equine Behaviour @ team @ |
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2958 |
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| Author |
Wilson O. E., |
| Title |
Sociobiology: The new Synthesis |
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Book Whole |
| Year |
2000 |
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| Volume |
25th edition |
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Belknap Press |
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Cambridge |
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Equine Behaviour @ team @ WilsonO.E.1929 |
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4731 |
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| Author |
Linklater, W.L.; Cameron, E.Z.; Stafford, K.J.; Veltman, C.J. |
| Title |
Social and spatial structure and range use by Kaimanawa wild horses (Equus caballus: Equidae) |
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Journal Article |
| Year |
2000 |
Publication |
New Zealand Journal of Ecology |
Abbreviated Journal |
New Zealand J. Ecol. |
| Volume |
24 |
Issue |
2 |
Pages |
139-152 |
| Keywords |
Bachelor male; Band; Density; Habitat use; Home range; Management proposals; Micro-climate; Vegetation monitoring; habitat use; home range; mammal; social structure; spatial distribution; New Zealand; Equus caballus |
| Abstract |
We measured horse density, social structure, habitat use, home ranges and altitudinal micro-climates in the south-western Kaimanawa ranges east of Waiouru, New Zealand. Horse density in the Auahitotara ecological sector averaged 3.6 horses.km-2 and ranged from 0.9 to 5.2 horses.km-2 within different zones. The population's social structure was like that of other feral horse populations with an even adult sex ratio, year round breeding groups (bands) with stable adult membership consisting of 1 to 11 mares, 1 to 4 stallions, and their predispersal offspring, and bachelor groups with unstable membership. Bands and bachelor males were loyal to undefended home ranges with central core use areas. Band home range sizes varied positively with adult band size. Home ranges overlapped entirely with other home ranges. Horses were more likely to occupy north facing aspects, short tussock vegetation and flush zones and avoid high altitudes, southern aspects, steeper slopes, bare ground and forest remnants. Horses were more likely to be on north facing aspects, steeper slopes, in exotic and red tussock grasslands and flush zones during winter and at lower altitudes and on gentler slopes in spring and summer. Seasonal shifts by bands to river basin and stream valley floors in spring and higher altitudes in autumn and winter are attributed to the beginning of foaling and mating in spring and formation of frost inversion layers in winter. Given horse habitat selectivity and the presence of other ungulate herbivores, results from present exclosures are likely to exaggerate the size of horse impacts on range vegetation. Proposals to manage the population by relocation and confinement are likely to modify current social structure and range use behaviour and may lead to the need for more intensive management in the longer term. |
| Address |
Ecology Group, Institute of Natural Resources, Massey University, Private Bag 11-222, Palmerston North, New Zealand |
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01106465 (Issn) |
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Cited By (since 1996): 12; Export Date: 21 April 2007; Source: Scopus; Language of Original Document: English; Correspondence Address: Linklater, W.L.; Ecology Group; Institute of Natural Resources; Massey University; Private Bag 11-222 Palmerston North, New Zealand; email: wlinklater@hotmail.com |
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refbase @ user @ |
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793 |
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| Author |
Emery, N.J. |
| Title |
The eyes have it: the neuroethology, function and evolution of social gaze |
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Journal Article |
| Year |
2000 |
Publication |
Neuroscience and Biobehavioral Reviews |
Abbreviated Journal |
Neurosci Biobehav Rev |
| Volume |
24 |
Issue |
6 |
Pages |
581-604 |
| Keywords |
Animals; *Eye; Fixation, Ocular; Humans; *Social Behavior |
| Abstract |
Gaze is an important component of social interaction. The function, evolution and neurobiology of gaze processing are therefore of interest to a number of researchers. This review discusses the evolutionary role of social gaze in vertebrates (focusing on primates), and a hypothesis that this role has changed substantially for primates compared to other animals. This change may have been driven by morphological changes to the face and eyes of primates, limitations in the facial anatomy of other vertebrates, changes in the ecology of the environment in which primates live, and a necessity to communicate information about the environment, emotional and mental states. The eyes represent different levels of signal value depending on the status, disposition and emotional state of the sender and receiver of such signals. There are regions in the monkey and human brain which contain neurons that respond selectively to faces, bodies and eye gaze. The ability to follow another individual's gaze direction is affected in individuals with autism and other psychopathological disorders, and after particular localized brain lesions. The hypothesis that gaze following is “hard-wired” in the brain, and may be localized within a circuit linking the superior temporal sulcus, amygdala and orbitofrontal cortex is discussed. |
| Address |
Center for Neuroscience, Department of Psychiatry & California Regional Primate Research Center, University of California, Davis, CA 95616, USA. njemery@ucdavis.edu |
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English |
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0149-7634 |
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PMID:10940436 |
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no |
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refbase @ user @ |
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3996 |
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| Author |
Vervaecke, H.; de Vries, H.; van Elsacker, L. |
| Title |
Dominance and its Behavioral Measures in a Captive Group of Bonobos (Pan paniscus) |
Type |
Journal Article |
| Year |
2000 |
Publication |
International Journal of Primatology |
Abbreviated Journal |
Int. J. Primatol. |
| Volume |
21 |
Issue |
1 |
Pages |
47-68 |
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| Abstract |
We investigated the existence of a social dominance hierarchy in the captive group of six adult bonobos at the Planckendael Zoo. We quantified the pattern of dyadic exchange of a number of behaviors to examine to what extent each behavior fits a linear rank order model. Following de Waal (1989), we distinguish three types of dominance: agonistic dominance, competitive ability and formal dominance. Fleeing upon aggression is a good measure of agonistic dominance. The agonistic dominance hierarchy in the study group shows significant and strong linearity. The rank order was: 1. female (22 yr), 2. female (15 yr)., 3. male (23 yr.), 4. female (15 yr.), 5. male (9 yr.), 6. male (10 yr.). As in the wild, the females occupy high ranks. There is prominent but nonexclusive female agonistic dominance. Teeth-baring does not fulfil the criteria of a formal submission signal. Peering is a request for tolerance of proximity. Since its direction within dyads is consistent with that of fleeing interactions, it is a useful additional measure to determine agonistic ranks in bonobos. In competitive situations, the females acquire more food than other group members do. The rank obtained from access to food resources differs from the agonistic rank due to female intrasexual social tolerance, expressed in food sharing. We typify the dominance styles in the group as female intrasexual tolerance and male challenging of rank differences. The agonistic rank order correlates significantly with age and has a strong predictive value for other social behaviors. |
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Equine Behaviour @ team @ |
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2197 |
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| Author |
Sapolsky, R.M.; Romero, L.M.; Munck, A.U. |
| Title |
How Do Glucocorticoids Influence Stress Responses? Integrating Permissive, Suppressive, Stimulatory, and Preparative Actions |
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Journal Article |
| Year |
2000 |
Publication |
Endocr Rev |
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| Volume |
21 |
Issue |
1 |
Pages |
55-89 |
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The secretion of glucocorticoids (GCs) is a classic endocrine response to stress. Despite that, it remains controversial as to what purpose GCs serve at such times. One view, stretching back to the time of Hans Selye, posits that GCs help mediate the ongoing or pending stress response, either via basal levels of GCs permitting other facets of the stress response to emerge efficaciously, and/or by stress levels of GCs actively stimulating the stress response. In contrast, a revisionist viewpoint posits that GCs suppress the stress response, preventing it from being pathologically overactivated. In this review, we consider recent findings regarding GC action and, based on them, generate criteria for determining whether a particular GC action permits, stimulates, or suppresses an ongoing stress-response or, as an additional category, is preparative for a subsequent stressor. We apply these GC actions to the realms of cardiovascular function, fluid volume and hemorrhage, immunity and inflammation, metabolism, neurobiology, and reproductive physiology. We find that GC actions fall into markedly different categories, depending on the physiological endpoint in question, with evidence for mediating effects in some cases, and suppressive or preparative in others. We then attempt to assimilate these heterogeneous GC actions into a physiological whole. |
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| Notes |
10.1210/er.21.1.55 |
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no |
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Equine Behaviour @ team @ |
Serial |
4070 |
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| Author |
Houpt, K.; Marrow, M.; Seeliger, M. |
| Title |
A preliminary study of the effect of music on equine behavior |
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Journal Article |
| Year |
2000 |
Publication |
Journal of Equine Veterinary Science |
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| Volume |
20 |
Issue |
11 |
Pages |
691-737 |
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refbase @ user @ |
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1988 |
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| Author |
Lyn, H.; Savage-Rumbaugh, E.S. |
| Title |
Observational word learning in two bonobos (Pan paniscus): ostensive and non-ostensive contexts |
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Journal Article |
| Year |
2000 |
Publication |
Language & Communication |
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| Volume |
20 |
Issue |
3 |
Pages |
255-273 |
| Keywords |
Language acquisition; Bonobo; Fast mapping |
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Word learning has been extensively studied in humans. Children seem to be able to map new words onto objects with only one exposure to the referent. This ability has been called “fast mapping”(Carey, 1978 and Carey). Using a modified human paradigm, this paper explores two language-competent bonobos' (Pan paniscus) abilities to map new words to objects in realistic surroundings with few exposures to the referents. This paper also investigates the necessity of the apes maintaining visual contact (ostensive context) with the item to map the novel name onto the novel object. The bonobos tested in this experiment were able to map new words onto objects and could do so without visual contact with the items. |
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no |
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Equine Behaviour @ team @ |
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4675 |
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| Author |
Merl, S.; Scherzer, S.; Palme, R.; Möstl, E. |
| Title |
Pain causes increased concentrations of glucocorticoid metabolites in horse feces |
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Journal Article |
| Year |
2000 |
Publication |
Journal of Equine Veterinary Science |
Abbreviated Journal |
J Equine Vet Sci |
| Volume |
20 |
Issue |
9 |
Pages |
586-590 |
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| Abstract |
The concentration of 11,17-dioxoandrostanes (11,17-DOA), a group of cortisol metabolites, was measured using enzyme immunoassay in fecal samples of horses experiencing painful episodes. One group of horses consisted of 10 stallions castrated (samples were collected daily for 10 days); the other group was made up of 29 horses which were brought to an animal hospital because of signs of colic (samples were collected twice daily for six days). Before castration, median concentrations of 10.5 nmol/kg feces were measured. On days 1 and 2 after castration, median 11,17-DOA values increased up to 26.2 and 50.0 nmol/kg feces, respectively, and decreased thereafter to levels lower than at the beginning of the sampling period. High variations were measured between individual cases of colic. In animals with colic, all horses excreted more than 33 nmol 11,17-DOA/kg feces for various periods. The highest concentration measured was 885 nmol/kg feces. One animal out of the 29 colic horses did not show any clinical signs of pain upon arrival in the hospital. The 11,17-DOA values were below 17 nmol/kg feces in all those samples. From this data we conclude, that the concentration of 11,17-DOA in feces is a parameter for painful situations that have occurred one or two days earlier. |
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0737-0806 |
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no |
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Equine Behaviour @ team @ |
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6047 |
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| Author |
Houpt, K.; Marrow, M.; Seeliger, M. |
| Title |
A preliminary study of the effect of music on equine behavior |
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Journal Article |
| Year |
2000 |
Publication |
Journal of Equine Veterinary Science |
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| Volume |
20 |
Issue |
11 |
Pages |
691-737 |
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0737-0806 |
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Equine Behaviour @ team @ |
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6633 |
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