Patterns of puberal development in Sahiwal and Brahman cross bulls in tropical Australia. I. Growth and semen characteristics.

Patterns of puberal development in Sahiwal and Brahman cross bulls in tropical Australia. I. Growth and semen characteristics. Research Abstract Details 

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Patterns of puberal development in Sahiwal and Brahman cross bulls in tropical Australia. I. Growth and semen characteristics. Abstract Text:

S Wildeus,R G Holroyd,K W Entwistle,

Reproductive development was monitored in 13 1 2 Brahman (BX), 20 3 4 BX, 8 1 2 Sahiwal (SX) and 11 3 4 SX crossbred bulls between one and two years of age. Liveweight increased during wet season (0.7 kg/day) and decreased during dry season conditions (-0.25 kg/day). Scrotal circumference (SC) increased from 18.6 to 25.0 cm, but decreased slightly during the later stages of the dry season. First ejaculates containing 50 x 10(6) spermatozoa were obtained from 25% of the bulls at 15.3 months of age and from 84% by two years of age. Sperm motility and morphology showed no consistent pattern, but number of sperm per ejaculate increased and seminal fructose concentrations decreased with advancing age. Significant genotype differences were noted for SC and seminal characteristics. Estimated age and liveweight at puberty were 570, 563, 578 and 542 days, and 251, 265, 247 and 256 kg for 1 2 BX, 3 4 BX, 1 2 SX and 3 4 SX bulls, respectively.

Patterns of puberal development in Sahiwal and Brahman cross bulls in tropical Australia. I. Growth and semen characteristics. Publishing Authors By Initials

S Wildeus,RG Holroyd,KW Entwistle,

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Patterns of puberal development in Sahiwal and Brahman cross bulls in tropical Australia. I. Growth and semen characteristics. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Theriogenology

VOLUME: 22

Page Numbers: 361-73

Journal Abbreviation: Theriogenology

ISSN: 0093-691X

DAY: 26

MONTH: Oct

YEAR: 1984

Patterns of puberal development in Sahiwal and Brahman cross bulls in tropical Australia. I. Growth and semen characteristics. Information

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LANGUAGE: eng

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AFFILIATION: Graduate School of Tropical Veterinary Science, James Cook University of North Queensland, Townsville, QLD 4811, Australia.

Country: United States

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MEDLINETA: Theriogenology

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