The aim of the present study was to evaluate the heterosis effects on weaning weight at 205 days (WW, n = 146,464), yearling weight at 390 days (YW, n = 69,315) and weight gain from weaning to yearling (WG, n = 59,307) in composite beef cattle. The fixed models were: RM, which included contemporary groups, class of age of dam, outcrossing percentages for direct and maternal effects, and additiv...

PCR protocols incorporating fluorescently labeled multiplexed primer combinations were developed to produce a linkage map for bison. Three hundred fifty eight microsatellite loci spanning all 29 autosomes were genotyped via 83 PCR multiplexes and nine individual amplifications. A total of 292 markers were integrated into an autosomal linkage map for bison. The sex averaged bison map (2,647 cM) ...

The aim of present study was to investigate myostatin gene polymorphism and its association with yearling weight records in Zel sheep using PCR-RFLP and PCR-SSCP methods. Blood samples were collected from 200 Zel sheep, randomly, and DNA was extracted using modified salting out method. Polymerase chain reaction was carried out to amplify 337, 222, and 311 bp fragments, respectively, comprising ...

Habitat quality is typically inferred by assuming a direct relationship between consumer density and resource abundance, although it has been suggested that consumer fitness may be a more accurate measure of habitat quality. We examined density vs. fitness-based measures of habitat quality for lions in the Serengeti National Park, Tanzania. A 40-year average of female reproductive success (year...

The objective of the present study was to evaluate the effects of inbreeding on average daily gains and Kleiber ratios in Moghani sheep. Traits included average daily gain from birth to 3 months (ADG1), average daily gain from birth to 6 months (ADG2), average daily gain from 3 months to 6 months (ADG3), average daily gain from 3 months to 9 months (ADG4), average daily gain from 3 months to ye...

The objective of the current study was to evaluate the effects of supplement type on performance, reproductive, and physiological responses of grazing yearling beef heifers. Sixty Brahman x British crossbred heifers were stratified by initial body weight (BW) and age, and randomly allocated to 12 pens (five heifers/pen). Pens were randomly assigned to one of two treatments: 1) molasses-based su...

KEREM, DAN,GERALD KOOYMAN,JOSEPH P. SCHROEDER,JAMES J. WRIGHT, AND CHARLES M. DRABEK. Hyperbaric oxygen-induced seizure in a marine mammal, the seal. Am. J. Physiol. 222(5) : 13221325. 1972.-A female yearling northern elephant seal, Mirounga angustirostris, and a female yearling harbor seal, Phoca vitulina were subjected to breathing oxygen at a pressure of 4.5 Ata in the restrained unanestheti...