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	Author	Penzhorn Bl,
	Title	Equus zebra			Type	Journal Article
	Year	1988	Publication	Mammalian Species	Abbreviated Journal	Mammalian Species
	Volume	314	Issue		Pages	1-7
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	yes
	Call Number				Serial	1460
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	Author	Hamilton, C.R.; Vermeire, B.A.
	Title	Complementary hemispheric specialization in monkeys			Type	Journal Article
	Year	1988	Publication	Science	Abbreviated Journal	Science
	Volume	242	Issue	4886	Pages	1691-1694
	Keywords
	Abstract	Twenty-five split-brain monkeys were taught to discriminate two types of visual stimuli that engage lateralized cerebral processing in human subjects. Differential lateralization for the two kinds of discriminations was found; the left hemisphere was better at distinguishing between tilted lines and the right hemisphere was better at discriminating faces. These results indicate that lateralization of cognitive processing appeared in primates independently of language or handedness. In addition, cerebral lateralization in monkeys may provide an appropriate model for studying the biological basis of hemispheric specialization.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @			Serial	5342
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	Author	Bednarz, J.C.
	Title	Cooperative Hunting Harris' Hawks (Parabuteo unicinctus)			Type	Journal Article
	Year	1988	Publication	Science	Abbreviated Journal	Science
	Volume	239	Issue	4847	Pages	1525-1527
	Keywords
	Abstract	Coordinated hunting by several individuals directed toward the capture and sharing of one Large prey animal has been documented convincingly only for a few mammalian carnivores. In New Mexico, Harris' hawks formed hunting parties of two to six individuals in the nonbreeding season. This behavior improved capture success and the average energy available per individual enabled hawks to dispatch prey larger than themselves. These patterns suggest that cooperation is important to understanding the evolution of complex social behavior in higher vertebrates and, specifically, that benefits derived from team hunting a key factor in the social living of Harris' hawks.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	10.1126/science.239.4847.1525			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	4717
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	Author	Schilder, M.B.H.
	Title	Dominance relationships between adult Plains zebra stallions in semi – captivity			Type	Journal Article
	Year	1988	Publication	Behaviour	Abbreviated Journal	Behaviour
	Volume	104	Issue	3-4	Pages	300-319
	Keywords
	Abstract	The relationships between 4-5 adult zebra stallions, living in a safari park, were investigated over a period of 5 years. Asymmetries in the distributions of a number of behaviours could be explained by adopting dominance as an intervening variable. Dominance in stallions was of a bipolar nature with on the one hand behaviours representing subordinance and defence, and on the other hand behaviours reinforcing and confirming dominance. Expression of formal dominance seems to play a minor role. The dyadic relationships of stallions differed as to the number of behaviours reflecting dominance relationships. Although often linear rank-orders could be constructed, these rank-orders were not necessarily identical. This means that the concept of dominance is of only limited value for describing relationships between zebra stallions.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	yes
	Call Number				Serial	1564
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	Author	Rogers, A.R.
	Title	Does Biology Constrain Culture?			Type	Journal Article
	Year	1988	Publication	American Anthropologist	Abbreviated Journal	Am Anthropol
	Volume	90	Issue	4	Pages	819-831
	Keywords	models, learning, evolution, culture, fitness, adaptive, environment, human, natural selection, behavior
	Abstract	Most social scientists would agree that the capacity for human culture was probably fashioned by natural selection, but they disagree about the implications of this supposition. Some believe that natural selection imposes important constraints on the ways in which culture can vary, while others believe that any such constraints must be negligible. This article employs a “thought experiment” to demonstrate that neither of these positions can be justified by appeal to general properties of culture or of evolution. Natural selection can produce mechanisms of cultural transmission that are neither adaptive nor consistent with the predictions of acultural evolutionary models (those ignoring cultural evolution). On the other hand, natural selection can also produce mechanisms of cultural transmission that are highly consistent with acultural models. Thus, neither side of the sociobiology debate is justified in dismissing the arguments of the other. Natural selection may impose significant constraints on some human behaviors, but negligible constraints on others. Models of simultaneous genetic/cultural evolution will be useful in identifying domains in which acultural evolutionary models are, and are not, likely to be useful.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @ citeulike:907484			Serial	4199
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	Author	Thackeray, J.F.
	Title	Zebras from wonderwerk cave, northern Cape province, South Africa: attempts to distinguish Equus burchelli and E. quagga			Type	Journal Article
	Year	1988	Publication	South African journal of science	Abbreviated Journal	Suid- Afrikaanse Tydsskrif vir Wetenskap
	Volume	84	Issue		Pages	99-101
	Keywords	Cape Province; Teeth; Statistical analysis; Equidae; Hippomorpha; South Africa; Southern Africa; Perissodactyla; Mammalia; Vertebrata
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0038-2353	ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	yes
	Call Number				Serial	1644
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	Author	Westlin-van Aarde, L.M.; van Aarde, R. J.; Skinner, J. D.
	Title	Reproduction in female Hartmann's zebra			Type	Journal Article
	Year	1988	Publication	Journal of Reproduction and Fertility	Abbreviated Journal	J Reprod Fert
	Volume	84	Issue		Pages	505-511
	Keywords	zebra; reproduction; ovaries; seasonality; progesterone
	Abstract	Ovaries, fetuses and plasma were collected from zebra mares shot in the Etosha National Park in Namibia between 15 and 25 August 1983. Ovarian weight was affected by reproductive status and most of the non-pregnant mares were anoestrous. The number of follicles varied between individuals and only pro-oestrous/oestrous mares had follicles larger than 20 mm in diameter. The largest follicle in pregnant mares was only 9 mm in diameter. Corpora lutea and corpora albicantia were found in non-pregnant as well as pregnant mares: 4 pregnant mares had only corpora albicantia. The presence of secondary corpora lutea could not be confirmed in any of the pregnant mares. Implantation was estimated to occur at around 73 days of gestation, and most mares (84%) had conceived between November and April. Peripheral concentrations of plasma progesterone during pregnancy varied from 0·5 to 2·4 ng/ml.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	yes
	Call Number				Serial	1705
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	Author	Penzhorn, B. L.; van der Merwe, N. J.
	Title	*Testis size and onset of spermatogenesis in Cape mountain zebras (Equus zebra zebra)*			Type	Journal Article
	Year	1988	Publication	Journal of Reproduction and Fertility	Abbreviated Journal	J Reprod Fert
	Volume	83	Issue		Pages	371-375
	Keywords	mountain zebra; testis size; spermatogenesis
	Abstract	Testis mass of adult Cape mountain zebra stallions (mean 70·0 g) was appreciably less than that of other zebra species and domestic horses. The histological appearance of the testes of 11-, 24- and 29-month-old colts was typically prepubertal. Spermatogenic activity of a 4-year-old stallion obtained at the end of summer was at a very low level, while a 4·5-year-old stallion obtained 6 weeks after the winter solstice showed a marked increase in spermatogenesis compared with the 4-year-old. Stallions 6·5-19 years of age collected in different seasons all showed active spermatogenesis.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	yes
	Call Number				Serial	1463
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	Author	Mackintosh, N.J.
	Title	Approaches to the study of animal intelligence			Type	Journal Article
	Year	1988	Publication	British Journal of Psychology	Abbreviated Journal
	Volume	79	Issue		Pages	509-525
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	Cited By (since 1996): 17; Export Date: 24 October 2008			Approved	no
	Call Number	Admin @ knut @			Serial	4607
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	Author	Black, J.M.
	Title	Preflight Signalling in Swans: A Mechanism for Group Cohesion and Flock Formation			Type	Journal Article
	Year	1988	Publication	Ethology	Abbreviated Journal	Ethology
	Volume	79	Issue	2	Pages	143-157
	Keywords
	Abstract	Abstract The preflight behaviour of whooper swans Cygnus cygnus and Bewick's swans Cygnus columbianus bewickii was examined to determine the adaptive significance of the ritual. Analysis of the preflight sequence revealed that the rate of signalling became significantly faster as the time of takeoff approached. This provides the first quantitative evidence that a threshold of excitability is responsible for triggering synchronised flight in social units. Two ultimate and two proximate factors that affect this threshold were uncovered. They are: 1) Maintaining proximity to partners—flight was delayed by birds with non-attentive mates and signalling lasted on average four times longer than those whose mates showed more interest. 2) Maintaining flock cohesiveness—birds which performed signals for longer periods while swimming among uninterested birds were successful in attracting followers 61% of the time. 3) The bird's feeding performance related to dominance status—less successful feeders (potentially hungry birds), flew after little time and few signals. 4) The type of feeding opportunity at the eventual destination—birds which flew to provided feeds (nutritious barley) spent less time performing preflight signals than when they flew to forage on grass fields.
	Address
	Corporate Author				Thesis
	Publisher	Blackwell Publishing Ltd	Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1439-0310	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @			Serial	5315
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