Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"large litters"”.
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The influence of weaning age on growth and development of the baby pig and reproductive efficiency in the sow
Thirty-nine litters containing 385 pigs of mixed breeding were weaned at 1, 7, 14, 21, 28 or 35 days of age in two experiments conducted during the spring and summer of 1966 . A creep ration constituted the only diet from weaning to 56 days with the exception of pigs weaned at 1 or 7 days. These …
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Population Ecology of Black Bears in the Alleghany Mountains of Virginia
… during 424 bear-winters. My analyses of 183 litters indicate that reproductive rates were high with relatively large litters (mean = 2.49 cubs / litter) and younger (3–4-year-old) females having smaller litters than older (> 5 years old) females. Overall cub sex ratios did not differ from …
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Chemical evidence of the quantitative thiamine and riboflavin requirements of the rat during pregnancy and the development of the fetus
… per day indicated that the diet provided a large surplus during the early portion of pregnancy and supplied some excess oven during the final days of gestation, as judged by the excretion of the vitamin by the kidneys. Females receiving this ration produced large litters of active young with …
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Phenotypic and genetic evaluation of fitness characteristics in sheep under a range environment
… accounted for most of the litter size effects in large litters. The influence of informative censoring was considered by assuming that lambs censored by 3 d of age had died at the time of censoring. Heritability of lamb survival at 3 d of age (estimated using an animal model in MTDFREML) was near …
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Identifying, understanding and harnessing the beneficial impact of nutritional interactions to optimise the performance and carcass quality of low birth weight pigs
… of commercially reared pigs born into large litters (>14piglets), this research initially aimed to quantify the growth and mortalityrate of low and average birth weight pigs throughout their lifetime oncommercial farms in Northern Ireland. Low birth weight (Low BW; <1kg)(n=328) and …