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Breeding records, including 649 inseminations during fall and winter at a dairy farm in a subtropical area of Western Mexico (24°N; 24°C, mean annual temperature 24°C) were analyzed to document effects of sex-sorted semen from commercial Gyr bulls, estrus synchronization protocol, inseminator, sire ...

Mellado, M.; Coronel, F.; Estrada, A.; Ríos, F. G.
Springer, Amsterdam, The Netherlands
Tropical Animal Health and Production, 2010, 42, 7, pp 1493-1496

Nine Brahman and 6 Nelore bulls were examined for libido and serving capacity, semen characteristics and scrotal circumference, a week before being placed, individually, into a group of 16 oestrus-synchronized heifers to observe mating activity. Scores for libido (0-10) and for serving capacity...

Silva-Mena, C.; Aké-López, R.; Delgado-León, R.
Theriogenology, 2000, 53, 4, pp 991-1002