| Records |
| Author |
Clutton-Brock, T.H.; Green, D.; Hiraiwa-Hasegawa, M.; Albon, S.D. |
Title  |
Passing the buck: resource defence, lek breeding and mate choice in fallow deer |
Type |
Journal Article |
| Year |
1988 |
Publication |
Behav. Ecol. Sociobiol. |
Abbreviated Journal |
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| Volume |
23 |
Issue |
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Pages |
281-296 |
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| Abstract |
lsquoLekrsquo breeding systems, where males defend small, clustered mating territories, are thought to occur where the distribution of females is heavily clumped but males are unable to defend resources used by females. In this paper, we describe a breeding system in fallow deer where males are able to defend resources used by females but the most successful bucks instead defend small territories on a traditional mating ground; where the lek is sited in an area not heavily used by females at other times of year and is visited primarily by females in or close to oestrus; and where mating success on the lek is related to territory position and to male phenotype but not to the resources available on different lek territories. Comparisons with other ungulates suggest that lek breeding species fall into two groups: those where leks are regularly visited by herds of females many of which are not in oestrus and those, like fallow deer, where leks are visited primarily by oestrous females. In the latter species, it is unlikely that females visit the lek for ecological reasons. |
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| Notes |
10.1007/Bf00300575 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4882 |
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| Author |
Holzapfel, W.H.; Botha, S.J. |
| Title |
Physiology of Sporolactobacillus strains isolated from different habitats and the indication of in vitro antagonism against Bacillus species |
Type |
Journal Article |
| Year |
1988 |
Publication |
International Journal of Food Microbiology |
Abbreviated Journal |
Int J Food Microbiol |
| Volume |
7 |
Issue |
2 |
Pages |
161-168 |
| Keywords |
Animals; Bacillaceae/isolation & purification/*physiology; Bacillus/*physiology; Cattle; *Ecology; Feces/*microbiology; Food Microbiology; Horses; Sewage; Sheep; Water Microbiology |
| Abstract |
In an ecological study only low numbers of Sporolactobacillus were found in habitats such as the faeces of herbivores, the rumen of cattle and the final waste water of an abattoir. Their presence in the final waste water of an abattoir indicates their possible association with food, and, more specifically, with meat. Differences were found in some physiological characteristics. One isolate (L2404) differed from the authentic Sporolactobacillus ATCC 15538 by its inability to ferment inulin, its growth in presence of 6.5% NaCl and in 0.2% tellurite, by the isomer(s) of lactic acid produced and the mol% G + G in the DNA. One Sporolactobacillus isolate (L2407) showed antagonism against Bacillus cereus, Bacillus cereus var, mycoides, Bacillus megaterium and Bacillus subtilis. |
| Address |
Department of Microbiology and Plant Pathology, University of Pretoria, Republic of South Africa |
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English |
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| ISSN |
0168-1605 |
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| Notes |
PMID:3275317 |
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no |
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Equine Behaviour @ team @ |
Serial |
2675 |
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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 |
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| 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. |
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Blackwell Publishing Ltd |
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1439-0310 |
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no |
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Equine Behaviour @ team @ |
Serial |
5315 |
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| Author |
Kirkpatrick, J. F.; Kasman, L. H.; Lasley,; B. L.; Turner, J. W. Jr. |
| Title |
Pregnancy Determination in Uncaptured Feral Horses |
Type |
Journal Article |
| Year |
1988 |
Publication |
Journal of Wildlife Management |
Abbreviated Journal |
J Wildl Manag |
| Volume |
52 |
Issue |
2 |
Pages |
305-308 |
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| Abstract |
The urinary excretion of estrone sulfate ($\text{E}{1}\text{S}$) by 25 free-roaming feral horses (Equus caballus) was measured by radioimmunoassay applied to extracts of urine-soaked soil. Twelve of 15 mares having $\text{E}{1}\text{S}$ concentrations >1.0 mg/mg creatinine (x = 2.64 +- 1.02 [SD]) produced foals. All 10 mares with $\text{E}{1}\text{S}$ concentrations <1.0 mg/mg creatinine (x = 0.44 +- 0.26) did not foal. Extracting urine from soil and measuring $\text{E}{1}\text{S}$ and creatinine can be used to determine pregnancy in free-roaming feral horses without the stress of capture or immobilization. |
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no |
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Equine Behaviour @ team @ |
Serial |
2290 |
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| Author |
KIRKPATRICK JF et al, |
| Title |
Pregnancy determination in uncaptured feral Horses based on steroid metabolites in urine – soaked snow and free steroids in feces |
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Journal Article |
| Year |
1988 |
Publication |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1272 |
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| Author |
Houpt, K.A.; Fraser, A.F. |
| Title |
Przewalski horses |
Type |
Journal Article |
| Year |
1988 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
21 |
Issue |
1-2 |
Pages |
1-3 |
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no |
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Equine Behaviour @ team @ |
Serial |
2302 |
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| Author |
Ryder, O.A. |
| Title |
Przewalski's horse – putting the wild horse back in the wild |
Type |
Journal Article |
| Year |
1988 |
Publication |
Oryx |
Abbreviated Journal |
Oryx |
| Volume |
22 |
Issue |
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Pages |
154-157 |
| Keywords |
Equidae genetics. |
| Abstract |
The Asian wild horse, or Przewalski's horse (Equus przewalskii), is believed to currently survive only in captivity. There are more than 660 individuals in over 70 zoological collections, and animals are available for reintroduction. The Przewalski's horse had been bred in captivity for 12 generations, and inbreeding has occurred. Genetic variability has been lost, and released animals will require acclimatization on or near release sites. In China, a program is under way for acclimatization, breeding, and release of wild horses, and plans are being made for a similar program in Mongolia. (LCA) |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
| Call Number |
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Serial |
1537 |
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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 |
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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. |
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from Professor Hans Klingels Equine Reference List |
Approved |
yes |
| Call Number |
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Serial |
1705 |
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| Author |
Fielding D, |
| Title |
Reproductive characteristics of the Jenny donkey – Equus Asinus: a review |
Type |
Journal Article |
| Year |
1988 |
Publication |
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Abbreviated Journal |
Trop Anim Hlth Prod |
| Volume |
20 |
Issue |
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Pages |
161-166 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Serial |
1086 |
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| Author |
Huff, A.N. |
| Title |
Safety |
Type |
Journal Article |
| Year |
1988 |
Publication |
Journal of Equine Veterinary Science |
Abbreviated Journal |
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| Volume |
8 |
Issue |
1 |
Pages |
81-81 |
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no |
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Equine Behaviour @ team @ |
Serial |
4669 |
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