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Effects of inbreeding on body weight at harvest size and grow-out survival rate in a selected population of Pacific white shrimp Penaeus (Litopenaeus) vannamei
Effects of inbreeding on body weight at harvest size and grow-out survival rate in a selected population of Pacific white shrimp Penaeus (Litopenaeus) vannamei
Friday, August 22, 2014
Posters (The Westin Bayshore)
Abstract Text: To study the effect of inbreeding on body weight at harvest size (130 days of age) and grow-out survival rate (65-130 days of age) in a nucleus breeding population, an experiment was designed to generate inbred families product of sibling mating in three successive generations, as well as groups of families with a range of inbreeding coefficients in a broodstock line selected for growth and survival. Inbreeding coefficients varied between 0 and 60.4%. A total of 16,361 shrimp from 320 families were analyzed. Data was analyzed using mixed linear model methodology and restricted maximum likelihood methods. Inbreeding had a negative effect on body weight at harvest size of -2.19 ± 0.41% per 10% increase on the inbreeding coefficient (P < 0.001), but it did not have an effect on grow-out survival rate.
Keywords:
inbreeding
growth
survival
Penaeus (Litopenaeus) vannamei