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Embryonic mortality, calf production, calving interval and life span of imported Friesian cattle in western Nigeria

Published online by Cambridge University Press:  27 March 2009

J. A. Adeneye
Affiliation:
Department of Animal Science, University of Ibadan, Ibadan, Nigeria

Extract

Abortion and stillbirth ranges of 1·8–16·1% and 1·26–6·5% respectively have been reported among Friesian cattle by Asker & El-Itriby (1957), Ragab & Asker (1959), Juma (1968) and Kassir & Juma (1968). Abortions and stillbirths occurred more frequently among heifers than among cows (Philipsson, 1971). Calving interval varied between 367 and 474 days, the first interval being the longest (Ragab & Asker, 1959; Zaki, Abdel Razek & Dessouky, 1965; Marples& Trail, 1967; Trail &Marples, 1968; Anon. 1969; Knudsen & Sohael, 1970; McLntyre, 1971; Kiwuwa, 1972).

Type
Short Note
Copyright
Copyright © Cambridge University Press 1982

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