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Breeding soundness evaluation of extensively managed bulls in Costa Rica
(Elsevier, 1999-02-17)
This paper describes the results of single breeding soundness evaluations (BSE) in 898 Bos indicus, Bos taurus and B. indicus x B. taurus bulls, 1 to 12 yr. old, extensively reared in different climatic regions of Costa ...
Management factors related to calf morbidity and mortality rates
(Elsevier B.V, 1990)
An observational epidemiological study was carried out on 63 commercial Dutch dairy farms. The relationship between managerial procedures and morbidity and mortality patterns in 1037 dairy calves from birth to 4 months of ...
Monitoring female reproductive function by measurement of fecal estrogen and progesterone metabolites in the white-faced saki (Pithecia pithecia)
(Wiley-Liss, 1994)
A simple method for extracting and measuring ovarian steroids in feces is
applied to the ovarian cycle, pregnancy, parturition, and period of lacta tional amenorrhea in Pithecia pithecia. Small amounts of wet, unmixed ...
Morphological features of the seminiferous and cauda Epididymides epithelia of breeding zebu bulls with normal and decreased testicular consistency
(The Society for Reproduction and Development, 1999)
The fine morphology of the testes and epididymes collected from breeding Zebu (Bos indicus) bulls with normal or decreased testicular consistency (TC) at clinical palpation was studied. The ultrastructure of testicles with ...
Event-time analysis of reproductive traits of dairy heifers
(Elsevier, 1998-11)
Data on the reproductive traits of dairy heifers
were analyzed using event-time techniques. Traits
analyzed were age at first calving (n = 4631), days to
first breeding, and days open (n = 1992) during the
first ...
Tail stump sperm defect as a cause of sterility in an indobrasil (Bus indicus) bull
(Blackwell Wissenschafts-Verlag, Berlin, 1998)
The first known case of an Indobrasil (BOA indicus) bull, with a
frequency of 100% of the specific sperm abnormality, known
as ‘tail stump sperm defect’ is reported. A 5-year old bull was
located as a breeding sire in ...