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Author |
Collery, L. |
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Title |
Observations of equine animals under farm and feral conditions |
Type |
Journal Article |
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Year |
1974 |
Publication |
Equine veterinary journal |
Abbreviated Journal |
Equine Vet J |
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Volume |
6 |
Issue |
4 |
Pages |
170-173 |
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Keywords |
Aggression; Animals; Animals, Newborn; Breeding; Circadian Rhythm; Feeding Behavior; Female; Horses/*physiology; Housing, Animal; Humans; Male; Pregnancy; Puberty; Reproduction; Sexual Behavior, Animal; Social Dominance |
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0425-1644 |
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PMID:4473340 |
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no |
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Call Number |
refbase @ user @ |
Serial |
680 |
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Author |
Feist, J.D.; McCullough, D.R. |
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Title |
Reproduction in feral horses |
Type |
Journal Article |
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Year |
1975 |
Publication |
Journal of Reproduction and Fertility. Supplement |
Abbreviated Journal |
J Reprod Fertil Suppl |
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Volume |
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Issue |
23 |
Pages |
13-18 |
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Keywords |
Age Factors; Animals; Female; Horses/*physiology; Leadership; Male; Maternal Behavior; Population; Reproduction; *Sexual Behavior, Animal; Social Dominance; Sucking Behavior |
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Abstract |
A behavioural study of feral horses was conducted on the Pryor Mountain Wild Horse Range in the western United States. All 270 horses on the Range were identified individually. The sex ratio was nearly balanced. Foal to adult female ratio was 43-2:100. Morality was concentrated among foals and old horses. Horses were organized as forty-four harem groups each with a dominant stallion, one to two immature stallions, one to three immature mares, one to three adult mares and their yearling and foal offspring, and 23 bachelor groups of one to eight stallions. Harem groups were quite stable year-round because of dominance and leadership by the stallions and group fidelity by mares and their offsring. Most changes occurred during the breeding season and involved immature females. Defeat of dominant stallions was infrequent. Immature males were tolerated because of their submissive behaviour. Bachelor stallion groups were inherently unstable. Mares came into heat after foaling in May/June, and were mated by harem stallions only. |
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0449-3087 |
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Notes |
PMID:1060766 |
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refbase @ user @ |
Serial |
1964 |
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Author |
Nelson, W.A.; Keirans, J.E.; Bell, J.F.; Clifford, C.M. |
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Title |
Host-ectoparasite relationships |
Type |
Journal Article |
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Year |
1975 |
Publication |
Journal of Medical Entomology |
Abbreviated Journal |
J Med Entomol |
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Volume |
12 |
Issue |
2 |
Pages |
143-166 |
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Keywords |
Animal Nutrition Physiology; Animals; Anoplura/physiology; *Arthropods; Birds/parasitology; Chickens/parasitology; Dermacentor/parasitology; Diptera; Ecology; Feeding Behavior; Female; Horses/parasitology; Humans; Male; Mallophaga/physiology; Mice/parasitology; Mites/physiology; Reproduction; Sarcoptes scabiei/physiology; Sheep/parasitology; Skin/parasitology; Ticks/physiology; Toxins, Biological/toxicity; Trombiculidae/physiology |
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0022-2585 |
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Notes |
PMID:808617 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2704 |
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Author |
Ogbourne, C.P. |
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Title |
Variations in the fecundity of strongylid worms of the horse |
Type |
Journal Article |
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Year |
1971 |
Publication |
Parasitology |
Abbreviated Journal |
Parasitology |
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Volume |
63 |
Issue |
2 |
Pages |
289-298 |
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Keywords |
Animals; Animals, Newborn; Ecology; Feces; Female; Horses; Larva/growth & development; Male; Ovum; Parasite Egg Count; Reproduction; Seasons; Strongyle Infections, Equine/*etiology; Strongyloides/*growth & development; Time Factors |
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0031-1820 |
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PMID:5129804 |
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no |
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Call Number |
Equine Behaviour @ team @ |
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2727 |
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Author |
Detmer, D. |
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Title |
Response: of pigs and primitive notions |
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Journal Article |
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Year |
1992 |
Publication |
Between the Species : a Journal of Ethics |
Abbreviated Journal |
Between Species |
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Volume |
8 |
Issue |
4 |
Pages |
203-208 |
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Keywords |
Agriculture; *Animal Rights; Animals; *Animals, Genetically Modified; Humans; Self Concept; Stress, Psychological; Genetics and Reproduction |
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Notes |
PMID:12091951; KIE: 9 fn.; KIE: KIE BoB Subject Heading: genetic intervention |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4156 |
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Author |
Bermudez, J.L. |
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Title |
The moral significance of birth |
Type |
Journal Article |
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Year |
1996 |
Publication |
Ethics |
Abbreviated Journal |
Ethics |
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Volume |
106 |
Issue |
2 |
Pages |
378-403 |
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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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0014-1704 |
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Notes |
PMID:11656645; KIE: 31 fn.; KIE: KIE BoB Subject Heading: fetuses; KIE: KIE BoB Subject Heading: personhood |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4177 |
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Author |
Keiper, R.; Houpt, K. |
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Title |
Reproduction in feral horses: an eight-year study |
Type |
Journal Article |
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Year |
1984 |
Publication |
American journal of veterinary research |
Abbreviated Journal |
Am J Vet Res |
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Volume |
45 |
Issue |
5 |
Pages |
991-995 |
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Keywords |
Abortion, Veterinary/epidemiology; Anestrus; Animal Population Groups/*physiology; Animals; Animals, Wild/*physiology; Birth Rate; Female; Fertility; Horse Diseases/epidemiology; Horses/*physiology; Lactation; Male; Maryland; Pregnancy; *Reproduction; Seasons; Sex Ratio; Virginia |
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Abstract |
The reproductive rate and foal survival of the free-ranging ponies on Assateague Island National Seashore were studied for 8 years, 1975 to 1982. Most (52%) of the 86 foals were born in May, 13% were born in April, 22.6% in June, 10.4% in July, and less than 1% in August and September. The mean foaling rate was 57.1 +/- 3.9% and the survival rate was 88.3 +/- 3.6%. Forty-eight colts and 55 fillies were born (sex ratio 53% female). Mares less than 3 years old did not foal and the foaling rate of 3-year-old mares was only 23%, that of 4-year-old mares was 46%, that of 5-year-old mares was 53%, and 6-year-old mares was 69%. The relatively poor reproduction rate was believed to be a consequence of the stress of lactating while carrying a foal when forage quality on the island was low. The hypothesis was supported by the higher reproductive rate (74.4 +/- 2.4%) of the ponies in the Chincoteague National Wildlife Refuge on the southern part of the island. Their foals are weaned and sold in July each year. Despite the low reproductive rate on Assateague Island National Seashore , the number of ponies increased from 43 to 80, a 90% increase in the 8-year period or greater than 10%/yr. There were 24 deaths and 8 dispersals from the study area. |
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ISSN |
0002-9645 |
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Notes |
PMID:6732036 |
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Call Number |
refbase @ user @ |
Serial |
665 |
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Author |
Klingel, H. |
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Title |
Social organization and reproduction in equids |
Type |
Journal Article |
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Year |
1975 |
Publication |
Journal of Reproduction and Fertility. Supplement |
Abbreviated Journal |
J Reprod Fertil Suppl |
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Volume |
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Issue |
23 |
Pages |
7-11 |
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Keywords |
Animals; Behavior, Animal; Female; Male; Perissodactyla/*physiology; Reproduction; *Sexual Behavior, Animal; Social Behavior; Territoriality |
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Abstract |
There are two distinct types of social organization and, accordingly, two types of mating systems in equids. In the horse, Plains zebra and Mountain zebra, the adults live in non-territorial and cohesive one-male groups and in stallion groups. The family stallions have exclusive mating rights which are respected by all others. In Grevy's zebra and in the African and Asiatic wild asses, the stallions are permanently territorial and have exclusive mating rights within their territories. Ecological and evolutionary aspects are discussed. |
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0449-3087 |
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PMID:1060868 |
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Call Number |
Equine Behaviour @ team @ |
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2303 |
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Author |
Westlin-van Aarde, L.M.; van Aarde, R. J.; Skinner, J. D. |
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Title |
Reproduction in female Hartmann's zebra |
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Journal Article |
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Year |
1988 |
Publication |
Journal of Reproduction and Fertility |
Abbreviated Journal |
J Reprod Fert |
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84 |
Issue |
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Pages |
505-511 |
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Keywords |
zebra; reproduction; ovaries; seasonality; progesterone |
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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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Notes |
from Professor Hans Klingels Equine Reference List |
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yes |
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1705 |
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Author |
Ben-Shahar, R |
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Title |
Selectivity in large generalist herbivores: feeding patterns of African ungulates in a semi-arid habitat |
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Journal Article |
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Year |
1991 |
Publication |
African Journal of Ecology |
Abbreviated Journal |
Afr. J. Ecol. |
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Volume |
29 |
Issue |
4 |
Pages |
302-315 |
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Keywords |
diet; forage production; grazing; wildebeest; zebra |
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Abstract |
Feeding habits of free-ranging wildebeest and zebra were monitored in a semi-arid nature reserve, bordering the southwestern part of Kruger National Park, South Africa. The purpose of study was to distinguish and define the feeding niches of two roughage grazers that occur in similar habitat types. The monthly compositions of diets were evaluated by direct observations of feeding bouts over a period of two years when rainfall patterns were average and animal populations were stable. Other analyses evaluated the standing biomass of grass species in the reserve during the wet summer and dry winter seasons.
A considerable overlap of grass species composition was found in the diets of wildebeest and zebra. Ordination of bi-monthly records of the diet composition showed greater variations in scores of grasses in zebra diet in comparison to wildebeest. Seasonal patterns were more apparent in the wildebeest diet. Preference ranking of grass species indicated that zebra diet remained constant in winter and summer. Wildebeest diet however, alternated with seasons, showing high preferences during the winter months for grass species which were rejected during summer.
The combined assessment of results from three separate statistical methods analysing temporal patterns and preferences in diet composition revealed contradictory trends. The solution, however, relied on the initial assumptions posed. Hence, wildebeest and zebra are essentially generalist feeders which show a limited amount of preference in their choice of diet. |
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Equine Behaviour @ team @ |
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2226 |
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