A total number of 1243 records of calving cases of 585 dairy Friesian cows during 8 consecutive years from 1997 to 2004 collected from Sakha Animal Production Research Station belonging to Animal Production Research Institute, Agriculture Research Center were used to study the effect of sire, live body weight (LBW) and age of dam and calving season on twinning rate and its consequent effects on...

The objective of the study was to assess the dimensionality of seven linear traits (body condition score, body stature, body length, heart girth, navel height, body depth and flank circumference) in Nguni cows using factor analysis and indicate the relationship between the extracted latent variables and calving interval (CI) and age at first calving (AFC). The traits were measured between Decem...

emphasis on milk yield (my) as well as milk yield persistency (myp) and calving interval (ci) is necessary to achieve more sustainable productionin dairy cattle. therefore the main objective of this study was to find an optimum regression model to estimate economic values for my, myp and ci.using a deterministic bio-economic model, seventyfiveproduction states differing mainly in my, mypand ciw...

It was aimed to investigate the genetic parameters in growth, fertility, and productivity of Anatolian buffaloes maintained at private farms Yozgat. A total 1139 buffalo cows their calves were used study. The weights birth, weaning, 6th 12th months age, daily live weight gains (DLWG) born from 2015 2019 recorded. Calving interval (CI) service period (SP), lactation milk yield (LMY), per day (MY...

A study was carried out to evaluate non genetic factors affecting milk yield and milk composition in Zimbabwean Red Dane and Jersey cattle cattle. A total of 1004 and 10 986 unedited Red Dane and Jersey 305-day lactation records respectively, were obtained from Livestock Identification Trust (LIT) containing 22 herds (1 Red Dane herd and 21 Jersey herds), with Red Dane calving in the period 200...

Pregnancy rate, calving interval, birth weight, weaning weight, and quarterly BCS were collected for 5 consecutive years on 454 fall-calving multiparous British crossbred cattle (3 to 10 yr of age) to evaluate associations of age with BCS and production parameters. Body weight and BCS were collected pre-calving, prebreeding, at weaning, and midway through the second trimester of pregnancy (Augu...

The existing dairy farm housing, milking, feeding and calf management practices in Tarai region of Uttarakhand along with performance traits were studied. Total 30 households 596 livestock considered for this work. Agriculture is the mainstay locale animal husbandry as subsidiary occupation. Dairy animals mainly comprise 76% crossbreds 21% Murrah buffaloes. Farms 43% concrete, 30% bricks on edg...

Fertility, represented by calving interval, has been included in the genetic evaluation of Icelandic cattle since 1993. In spite this an unfavourable trend is seen and, recent implementation test-day models for milk production changed premise using interval to represent fertility. The aim study was estimate parameters and trends different female fertility traits dairy suggest new evaluation. In...

The objectives of this study were to identify the breeding Begaria cattle keepers. A semi-structured questionnaire, live animal ranking, and focus group discussions employed farmers. was conducted on a total 75 conveniently sampled households. Among population households, 506 heads (252 male 254 female animals) ranked as first best, second third and/or worst animals. Owners asked choose animals...