Results 271 to 280 of about 46,786 (294)

Factors Affecting Age at First Calving in Gir Cattle

International Journal of Livestock Research, 2014
The production records on 228 Gir cows with 680 lactations sired by 52 bulls, maintained at Cattle Breeding Farm, Junagadh Agricultural University, Junagadh, for 24 years (1987 – 2010) were studied. The data were analyzed to study the effect of period of calving and season of calving as fixed effect on the reproduction trait viz., age at first calving.
Nikhil Dangar, Pravin Vataliya
openaire   +1 more source

Age at first calving in UK Jersey cattle and its associations with first lactation 305-day milk yield, lifetime daily milk yield, calving interval and survival to second lactation

The Veterinary Record, 2020
Background The association between age at fist calving (AFC) and production, fertility and survivability in Jersey heifers requires evaluation and comparison with published literature on Holstein heifers.
F. Boothby, D. Grove-White, G. Oikonomou, J. Oultram   +3 more
semanticscholar   +1 more source

Calving day and age at first calving in Angus heifers.

Journal of animal science, 2010
Because of difficulties in data collection and analysis, in most breeds there have been limited ways to evaluate fertility in females on a between-herd basis. The objective of this study was to determine the heritabilities (direct and maternal) for CD (calving day) and AFC (age at first calving) in American Angus heifers and to evaluate the potential ...
J, Minick Bormann, D E, Wilson
openaire   +1 more source

Non Genetic Factors Affecting Age at First Calving in Surti Buffaloes

International Journal of Livestock Research, 2018
The records of 457 Surti buffaloes with 1346 lactations sired by 35 sires maintained at Livestock Research Station, Navsari Agricultural University, Navsari born during 1987 to 2012 were collected and analysed to examine the effect of non-genetic factors viz. season and period of birth on age at first calving.
Vallabh Pawar, Nikhil Dangar, Umed Ramani, Gaurav Pandya, Vishnu Kharadi, Balkrushna Brahmkshtri   +5 more
openaire   +1 more source

AGE AT FIRST CALVING OF FEMALE HUMPBACK WHALES IN SOUTHEASTERN ALASKA

Marine Mammal Science, 2006
Female humpback whales in southeastern Alaska have never been observed with their first calf at ages 5 to 7 years, the documented age at first reproduction in the Gulf of Maine humpback whale population. Long-term sighting histories of 10 individually identified females of known age in southeastern Alaska were used to address this issue.
Christine M. Gabriele, Janice M. Straley, Janet L. Neilson   +2 more
openaire   +1 more source

Identification of novel candidate genes for age at first calving in Nellore cows using a SNP chip specifically developed for Bos taurus indicus cattle.

Theriogenology, 2021
Miguel Angel Carabantes Dubon, V. Pedrosa, F. L. B. Feitosa, R. B. Costa, G. M. F. de Camargo, Marcio R Silva, L. F. Pinto   +6 more
semanticscholar   +1 more source

Calving day and age at first calving in Angus heifers1

Journal of Animal Science, 2010
J. Minick Bormann, D. E. Wilson
openaire   +1 more source

Factors Affecting Age at First Conception and Calving in Buffaloes

International Journal of Livestock Research, 2021
Soniya Bashyal, Nirajan Bhattarai, Dikshya Poudel   +2 more
openaire   +1 more source

Genetic analysis of age at first calving, accumulated productivity, stayability and mature weight of Nellore females.

Theriogenology, 2018
P. I. Schmidt, G. S. Campos, R. Lôbo, F. R. P. Souza, C. Brauner, A. A. Boligon   +5 more
semanticscholar   +1 more source

Seasonal influence of age at first calving on genetic variation and subsequent reproductive performances in Murrah buffaloes

Biological Rhythm Research, 2021
Kennady Vijayalakshmy, Sanjeev Kumar
exaly