Embryonic mortality

Embryonic mortality is a major concern in the commercial swine industry and primarily occurs early in gestation, but also during mid-gestation (~ days 50–70). Previous reports demonstrated that the embryonic loss rate was significant lower in Meishan than in commercial breeds (including Duroc). Most studies have focused on embryonic mortality in early gestation, but little is known about embryonic loss during mid-gestation.

11p viansan2711 30-07-2021 8 2   Download

Siruvidai and Peruvidai chicken are the major indigenous chicken ecotypes of Tamil Nadu state, India. A study was conducted to assess the fertility and hatchability of Siruvidai chicken hatching eggs incubated in a homestead incubator. The fertility, hatchability and embryonic mortality were recorded.

4p caygaocaolon7 18-09-2020 13 1   Download

Embryonic mortality (EM) is a major concern in the dairy industry across the world and it occurs due to loss of conceptus following fertilization until days 42-45 of pregnancy. The present study was carried out with the objective to detect EM in the crossbred cattle at the University Livestock Farm, Mannuthy, Kerala Veterinary and Animal Sciences University during the period from September 2017 to August 2019. Among the breedable animals inseminated at spontaneous oestrus, non-return animals (n=362) were selected for the study.

12p caygaocaolon6 30-07-2020 10 1   Download

The one-day-old O. latipes embryos is harvested and exposed to different concentrations of o, p`-DDT 0.04; 0.08; 0.12; 0.16; 0.2; 0.24; 0.28 and 0 µg/l (the control sample is not supplemented with o, p`-DDT) for 24, 48, 72 and 96 hours. After 24, 48, 72 and 96 hours, the results showed that LC50 value is gradually decreased, respectively 0.1013; 0.0772; 0.0486 and 0.0359 µg/l. The difference between LC50 values depends on the exposure concentration and exposure time. The results showed that the mortality rates of Medaka O.

9p caygaocaolon6 22-07-2020 23 2   Download

Cattle is one of the major livestock species for milk production, contributing significantly to the economy of our country and continuous milk production needs regular conception and successful calf crop production. World-over, for dairy economy, there is emphasis on one calf per year per cattle. Successful calving follows survival of the conceptus through embryonic and fetal development.

16p nguaconbaynhay5 16-05-2020 7 1   Download

The present study was conducted with the objectives to assess the circulating plasma progesterone concentrations in early pregnant cows and in those who suffered embryonic mortality. From the entire herd, a total of 142 (Sahiwal 29 and Hardhenu 113) cows were selected for the study. Out of 142 animals, only 53 animals exhibited non-return to estrus and rest showed estrus signs and behaviour before day 28 post-insemination.

7p nguaconbaynhay5 16-05-2020 9 1   Download

The present study was carried out with the objective to detect embryonic mortality in a total of 142 cows inseminated at spontaneous estrus. The ultrasonographic scanning with trans-rectal probe using frequency of 7.0 MHz was carried out on day 28 to confirm pregnancy and re-examination on day 45 to assess the incidence of embryonic mortality under farm conditions.

13p chauchaungayxua5 05-05-2020 12 2   Download

The present study was aimed to explore embryonic mortality pattern of fertile eggs of Vanaraja chicken reared on deep litter system. The study was conducted in the year 2016 at Hatchery Unit of West Bengal University of Animal and Fishery Sciences, Mohanpur campus (Nadia District). Birds were divided in 3 age groups as 27 to 40, 41 to 72 and 73 to 92 weeks. Eggs were grouped into three categories; 38 to 41.3, 41.6 to 54.8 and> 55g.

8p kethamoi2 15-12-2019 30 2   Download

Th i s book wi 11 be of great interest to anyone concerned with animal feeds and feeding programs whether one is studying bovine, porcine, equine, avian or lower vertebrate (fish and eel) nutrition. This information is critical to the success of an animal feeding program. Somet imes the di fference between a successful and a failing program can be traced to mineral deficiencies which cause either abnormal growth, reduced milk production, interrupted fertility and breeding, compromised immune system integrity and/or decrement in normal hemoglobin concentration.

0p cronus75 14-01-2013 46 4   Download

The aim of the study was to analyse prostate cancer mortality and incidence among ethnic German migrants who came to Germany from the FSU after 1990. Additionally, we highlighted some general aspects of the Aussiedler's health profile to place prostate cancer incidence and mortality into a broader context. We analyzed two cohorts of migrants in terms of all cause mortality, overall cancer and prostate cancer mortality and incidence including longitudinal and age effects.

238p ti_du_hoang 13-08-2012 41 2   Download