Results 251 to 260 of about 273,579 (298)

Molecular evidence for fat-tailed sheep domestication

Tropical Animal Health and Production, 2011
The sheep is one of the most successful and widely spread domestic animals. Archaeological evidence traces the first domestic sheep back to the Near East region around 9,000 years ago. It is also known that soon after, the domesticated sheep started to flow out of the centre of origin and spread all over the ancient world following the expansion of ...
Joana, Rocha, Shanyuan, Chen, Albano, Beja-Pereira   +2 more
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Ovis aries (Domestic sheep)

1967
The X is slightly larger than the largest acrocentric autosome. It is not difficult to identify. The Y is very easy to identify.
T. C. Hsu, Kurt Benirschke
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PASTEURELLA SPP. IN SYMPATRIC BIGHORN AND DOMESTIC SHEEP

Journal of Wildlife Diseases, 1997
Domestic sheep were sighted at different times from 1991 to 1993 on four Nevada (USA) ranges occupied by bighorn sheep. Nasal and pharyngeal swab samples were collected from both sheep species and cultured to determine if any strains of Pasteurella spp. were shared on range conditions after contact of the two species. Pasteurella spp.
A C, Ward, D L, Hunter, M D, Jaworski, P J, Benolkin, M P, Dobel, J B, Jeffress, G A, Tanner   +6 more
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Chromosomes, Hemoglobins, and Transferrins of Iranian Domestic Sheep

Journal of Heredity, 1976
Twelve breeds of Iranian domestic sheep were cytogenetically analyzed. The diploid chromosome number of 2n = 54 is identical to that of most breeds of domestic sheep, which is comprised of 3 pairs of metacentric and 23 pairs of acrocentric autosomes. The sex chromosomes consist of a large acrocentric X and a small bi-armed Y.
T D, Bunch, W C, Foote
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Retinal Photoreceptor Fine Structure in the Domestic Sheep

Cells Tissues Organs, 1983
The structure of the photoreceptors of the domestic sheep has been investigated by light and electron microscopy. In the sheep retina the photoreceptors are readily differentiated and adequately described by the classical terminology of rods and cones. Rods are more numerous then cones. They appear as tall slender cells measuring 45–50 µm in length and
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A New Species of Coccidia from Domestic Sheep

The Journal of Parasitology, 1952
While engaged in research on members of the genus Eimeria infecting Wyoming sheep, an undescribed species was observed. The parasite was recovered from two of nine animals housed at the Wyoming State Veterinary Laboratory at Laramie, Wyoming. Both animals had multiple infections; oocysts of Eimeria airloingi, E. ah-sa-ta, E. parva, E.
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Lungworms of the Domestic Pig and Sheep

1973
Publisher Summary This chapter discusses lungworms infection in domestic pig and sheep. Four species of lungworms infect the domestic pig, all belonging to the genus Metastrongylus. Two species are widely known namely Metastrongylus elongatus and Metastrongylus pudendotectu. They are cosmopolitan in their distribution. Numerous surveys have been made
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Mannheimia haemolytica infection in bighorn sheep and domestic sheep

2010
Respiratory disease caused by bacteria including Mannheimia haemolytica has contributed significantly to the drastic decline of bighorn sheep (BHS, Ovis canadensis) population of North America, from an estimated two million animals at the beginning of the nineteenth century to less than 70,000 today. Although M. haemolytica causes pneumonia in a number
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Domestic Sheep Optimization Algorithm

This paper proposes an optimization algorithm based on the behavior of domestic sheep flocks, the Domestic Sheep Optimization Algorithm (DSOA), and conducts systematic optimization design. This algorithm simulates the social behavior of domestic sheep in natural environments, including mechanisms such as information transfer, leader rotation ...
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[Domestication-related behavior in sheep].

Genetika, 1997
The motivational nature of domestication-related behavior, as well as its formation and variation at the ontogenetic, population, and breed levels were studied. Food motivation participated in the environmental regulation of sheep defensive reactions to humans: an increase in motivation decreased the strength of defensive behavior, and vice versa ...
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