A 2-yr study using primiparous and multiparous, spring-calving, crossbred beef cows was conducted to evaluate the effects of supplemental whole corn germ on reproductive performance, calf performance, and serum leptin concentrations. Each year, cows were blocked by age and BCS and assigned randomly to one of three treatments: PRE (n = 115) cows received 1.14 kg/d (DM basis) of whole corn germ f...

The objective of this study was to assess the genetic improvement programme of the Mpwapwa dairy cattle breed over the past four decades, based on on-station selection and breeding. Estimates of genetic parameters and genetic trends for total lactation milk yield (LMY), 305-day lactation milk yield (305LMY), lactation length (LL), age at first calving (AFC), and calving interval (CI) were deriv...

Phenotypic characterization of Bunaji (White Fulani) and Bunaji x Friesian breed cattle of the institutional herd of National Animal Production Research Institute (NAPRI) Shika; Kaduna State, Nigeria was carried out for the purpose of comparism. A total of 163 cattle were used comprising 20 Bunaji Bulls, 106 Bunaji cows and 37 Bunaji x Friesian. Data measured directly from the animals in the he...

The objective of this study was to evaluate main indicators of milk production on total 60 commercial dairy herds from the Czech Republic during a 9-yr period (2006-2014). Breakeven points and sensitivity analysis were used and associations of age at first calving (AFC), milk yield (MY) and calving interval (CI) were analyzed. Lowest AFC≤749 d showed the highest fertility, the lowest death rate...

This study estimates a calving interval for humpback whales from a longterm photo-ID catalogue of 2,973 individuals resighted in Hervey Bay, East Australia. The study proposes a modification of two existing methods to handle partial identification of sex and age-classes of whales from visual surveys. One method truncates the data to just breeding females and discards all resighting events prior...

Empowering smallholder cattle farmers through the Field station of School for Smallholder Community (SL-SPR) Program is one efforts to improve reproductive performance Bali in farmers. This research aims evaluate reared semi-intensively SL-SPR Sungai Lilin, South Sumatra. Data on were collected from observation method direct and interviews with respondents community. The was totally 45 farmers,...

The milk yield and survival of 91 Holstein-Friesian dairy cows that had had a left-displaced abomasum (LDA) corrected laparoscopically were compared with those of 193 control cows matched for herd, parity and calving date. Ninety per cent of the LDA treatments were performed within four weeks after calving. The risk of being culled during the whole observational period of at least three years w...

The present study was conducted to investigate the influence of administration ofGnRH orPGF2α during early postpartum (PP) on uterine involution (UI), postpartum period (PPP), days open (DP) number of services per conception and calving interval (CI) in cross-bred dairy cows. A total of 45 cross-bred dairy cows (4 – 8 years) were recruited to determine the influence of administration of GnRH or...

In modern high-yielding dairy herds fertility is of major economic importance. In order to gain maximum profit, calving intervals should not exceed 365 days. The achievement of a 365-day calving interval requires an early resumption of ovarian activity, an excellent oestrus detection, and a high first-service conception rate. Especially the inability to detect oestrus and to mate the cows by 60...