| Records |
| Author |
BASHORE, T. L.; KEIPER, R.; TURNER ,J. W. JR; KIRKPATRICK J. F. |
| Title |
The accuracy of fixed-wing aerial surveys of feral horses on a coastal barrier island |
Type |
Journal Article |
| Year |
1990 |
Publication |
Journal of coastal research |
Abbreviated Journal |
J. coast. res |
| Volume |
6 |
Issue |
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Pages |
53-56 |
| Keywords |
Accuracy; Airborne methods; Vegetation; Barrier islands; Maryland; Ground methods; United States; North America; America |
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| ISSN |
0749-0208 |
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Equine Behaviour @ team @ |
Serial |
2221 |
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| Author |
Gordon, I.J.; Lindsay, W.K. |
| Title |
Could Mammalian Herbivores “Manage” Their Resources? |
Type |
Journal Article |
| Year |
1990 |
Publication |
Oikos |
Abbreviated Journal |
Oikos |
| Volume |
59 |
Issue |
2 |
Pages |
270-280 |
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| Abstract |
The concept of resource management has gone hand in hand with group selection arguments. For this reason, it has been cast aside in the era of evolutionary theory which assumes that foraging strategies must have evolved under selection operating to maximise an individual's inclusive fitness. However, results from empirical studies show that under favourable environmental and social circumstances, resource management could be selectively advantageous. Much of the recent literature on plant-herbivore interactions suggest that herbivory can result in changes in the resource base which are assumed to increase the intake and fitness of the herbivore. As a result, a number of authors suggest that herbivores manage their resource utilisation to maximise the flow of nutrients from these resources. Long term territoriality or the exclusive use of a home range are the social systems most likely to favour selection for prudent resource exploitation. This review argues that, in many habitats, resource management strategies are not feasible, as individuals have little control over the way resources are depleted and renewed. Thus far, very little evidence is available showing that herbivorous mammals actively manage the resources which they utilise. |
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Equine Behaviour @ team @ |
Serial |
2297 |
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| Author |
Dublin, H.T.; Sinclair, A.R.E.; Boutin, S.; Anderson, E.; Jago, M.; Arcese, P. |
| Title |
Does competition regulate ungulate populations? Further evidence from Serengeti, Tanzania |
Type |
Journal Article |
| Year |
1990 |
Publication |
Oecologia |
Abbreviated Journal |
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| Volume |
82 |
Issue |
2 |
Pages |
283-288 |
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| Abstract |
Changes in populations of several ungulate species in the Serengeti-Mara region of East Africa over the past 30 years suggest several hypotheses for their regulation and coexistence. Recent censuses in the 1980s have allowed us to test the hypotheses that: (1) there was competition between wildebeest (Connochaetes taurinus) and Thomson's gazelle (Gazella thomsoni). This predicted that gazelle numbers should have declined in the 1980s when wildebeest were food limited. Census figures show no change in gazelle numbers between 1978 and 1986, a result contrary to the interspecific competition hypothesis; (2) wildebeest and African buffalo (Syncerus caffer) populations were regulated by intraspecific competition for food. Since both populations reached food limitation in the 1970s, the hypothesis predicted that the populations should have been stable in the 1980s. The results confirm these predictions for wildebeest and the buffalo population in the Mara reserve. In the Serengeti the buffalo population declined 41% over the period 1976-1984. The decline was not evenly distributed over the park, some areas showing an 80-90% decline, others no change or an increase in numbers. The decline was associated with proximity to human habitation; (3) an outbreak of the viral disease, rinderpest, in 1982 may have been the cause of the drop in buffalo population. Blood serum samples to measure the prevalence of antibodies were collected from areas of decreasing, stable and increasing populations. If rinderpest was the cause of decrease there should be a negative relationship between the prevalence of rinderpest and the instantaneous rate of increase (r). The results showed no relationship. We conclude that rinderpest was not the major cause of the drop in buffalo numbers. Elephant (Loxodonta africana) numbers dropped 81% in Serengeti in the period 1977-1986. In the Mara there was little change. The evidence suggests that extensive poaching in northern and western Serengeti during 1979-1984 accounted for the drop in both elephant and buffalo numbers. |
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no |
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Equine Behaviour @ team @ |
Serial |
2281 |
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| Author |
Loyola, E.G.; Rodriguez, M.H.; Gonzalez, L.; Arredondo, J.I.; Bown, D.N.; Vaca, M.A. |
| Title |
Effect of indoor residual spraying of DDT and bendiocarb on the feeding patterns of Anopheles pseudopunctipennis in Mexico |
Type |
Journal Article |
| Year |
1990 |
Publication |
Journal of the American Mosquito Control Association |
Abbreviated Journal |
J Am Mosq Control Assoc |
| Volume |
6 |
Issue |
4 |
Pages |
635-640 |
| Keywords |
Animals; Anopheles/*physiology; *Carbamates; Cattle; *Ddt; Ecology; Enzyme-Linked Immunosorbent Assay; Feeding Behavior/*drug effects; Horses; Humans; Insect Vectors; Insecticide Resistance; *Insecticides; Mexico; *Phenylcarbamates; Seasons |
| Abstract |
Intense and persistent use of DDT for malaria control has increased resistance and induced exophilic behavior of Anopheles pseudopunctipennis. An evaluation of bendiocarb and DDT to control this species in Sinaloa, Mexico, showed that, in spite of DDT-resistance, both insecticides produced similar effects. Feeding patterns were analyzed to explain these results. Resting mosquitoes were collected over the dry and wet seasons. Anophelines were tested in an ELISA to determine the source of the meals. The human blood index (HBI) ranged from 3.3 to 6.8% in DDT- and from 12.7 to 26.9% in bendiocarb-sprayed houses. Irritability and repellency in DDT-sprayed houses could explain the reduced HBI. In contrast, bendiocarb produced higher mortality. These effects could have affected different components of the vectorial capacity and similarly reduced malaria. |
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Center for Malaria Research, Chiapas, Mexico |
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English |
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8756-971X |
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| Notes |
PMID:2098469 |
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no |
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Equine Behaviour @ team @ |
Serial |
2671 |
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| Author |
Boesch C; Boesch H |
| Title |
Tool use and tool making in wild chimpanzees |
Type |
Journal Article |
| Year |
1990 |
Publication |
Folia Primatol. |
Abbreviated Journal |
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| Volume |
54 |
Issue |
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Pages |
86 |
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no |
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Equine Behaviour @ team @ |
Serial |
2983 |
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| Author |
Cheney DL; Seyfarth RM |
| Title |
Attending to behaviour versus attending to knowledge: examining monkeys' attribution of mental states |
Type |
Journal Article |
| Year |
1990 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
40 |
Issue |
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Pages |
742 |
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no |
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Equine Behaviour @ team @ |
Serial |
2987 |
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| Author |
Heyes CM; Dawson GR |
| Title |
A demonstration of observational learning using a bidirectional control |
Type |
Journal Article |
| Year |
1990 |
Publication |
Q. J. Exp. Psychol. |
Abbreviated Journal |
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| Volume |
42 |
Issue |
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59 |
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no |
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Equine Behaviour @ team @ |
Serial |
3008 |
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| Author |
Povinelli DJ; Nelson KE; Boysen ST |
| Title |
Inferences about guessing and knowing in chimpanzees (Pan troglodytes) |
Type |
Journal Article |
| Year |
1990 |
Publication |
J. Comp. Psychol. |
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104 |
Issue |
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203 |
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no |
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Equine Behaviour @ team @ |
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3030 |
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| Author |
Visalberghi E |
| Title |
Tool use in Cebus |
Type |
Journal Article |
| Year |
1990 |
Publication |
Folia Primatol. |
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54 |
Issue |
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Pages |
146 |
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no |
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Equine Behaviour @ team @ |
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3045 |
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| Author |
Spear, N.E.; Miller, J.S.; Jagielo, J.A. |
| Title |
Animal Memory and Learning |
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Journal Article |
| Year |
1990 |
Publication |
Annual Review of Psychology |
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41 |
Issue |
1 |
Pages |
169-211 |
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no |
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refbase @ user @ |
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3538 |
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