Results 1 to 10 of about 289,721 (306)
Correlation of litter size traits [PDF]
Biotechnology in Animal Husbandry, 2016 Heredity and correlation of litter size traits were observed in 3693 litters, i.e. in 1622 daughters of two genotypes Swedish Landrace genotype - SL; and F1 ♀ SLxLW. The study included daughters (minimum ten daughters per sire) of 24 sires.
Radović Čedomir +6 more
doaj +4 more sources
Density and reproductive characteristics of female brown bears in the Cantabrian Mountains, NW Spain [PDF]
The European Zoological Journal, 2018 Here we present annual nearest-neighbour distances (as a proxy of density) between females with cubs-of-the-year (hereafter FCOY) and reproductive characteristics of brown bears Ursus arctos in the Cantabrian Mountains (NW Spain), from 1989 to 2017. FCOY
V. Penteriani +10 more
doaj +3 more sources
Genetic study of litter size and litter uniformity in Landrace pigs [PDF]
Revista Brasileira de Zootecnia, 2020 We aimed to estimate litter size and litter uniformity genetic parameters and genetic trends of Landrace pigs at birth and at three weeks by using multitrait analyses for 2,787 litters.
Ederson Gomes Camargo +4 more
doaj +3 more sources
Evolution of Litter Size: Proximate and Ultimate Mechanisms. [PDF]
Integr Comp BiolSynopsis Relative reproductive success and failure are the ultimate determinants of Darwinian fitness. As such, reproductive traits and variations therein have an immediate and considerable impact on the evolutionary trajectory of lineages.
Wilsterman K +4 more
europepmc +3 more sources
The Evolution of Primate Litter Size
HumansLitter size plays an essential role in mammalian evolution and is one of the most important factors determining whether an organism is deemed to have a ‘slow’ or ‘fast’ life history strategy.
Jack H. McBride, Tesla A. Monson
doaj +2 more sources
Genetic and Non-Genetic Factors Affecting Litter Size and Birth Weight of Rabbit in Minna, Niger State, Nigeria [PDF]
Animal Production: Indonesian Journal of Animal Production, 2012 . Genetic and non-genetic factors influencing litter size and birth weight of rabbit was evaluated using New Zealand White and Chinchilla breeds. Parameters measured were total number of kittens born per litter, number of litter born alive, live litter ...
SSA Egena, GN Akpa, IC Alemede, A Aremu
doaj +4 more sources
Animal, 2022 Sheep meat producers derive the majority of income from sales of weaned lambs, determined by flock conception rates, litter size, and lamb survival. Field data from commercial flocks can inform sensitivity analyses of the effect of litter size on flock ...
L. Farrell +4 more
doaj +1 more source
Heterosis in the second and third generation affects litter size in a crossbreed mink (Neovison vison) population [PDF]
Archives of Biological Sciences, 2014 Litter sizes in a cross between Brown and Black mink color types were observed through six generations. Litter size was significantly affected by yearly environmental variations.
Thirstrup Janne +3 more
doaj +1 more source
Correlated response in litter size components in rabbits selected for litter size variability [PDF]
Journal of Animal Breeding and Genetics, 2017 SummaryA divergent selection experiment for the environmental variability of litter size (Ve) over seven generations was carried out in rabbits at the University Miguel Hernández of Elche. The Ve was estimated as the phenotypic variance within the female, after correcting for year‐season and parity‐lactation status. The aim of this study was to analyse
M.J. Argente +3 more
openaire +3 more sources
Genetic and phenotypic time trends of litter size, piglet mortality, and birth weight in pigs
Frontiers in Animal Science, 2023 IntroductionLitter size in pigs has increased steadily since 1990. Because of unfavorable genetic correlations with piglet mortality, breeding goals should include survival traits next to litter size.
Pieter W. Knap +7 more
doaj +1 more source