Open AccessInbreeding Effects on Body Weight at Harvest Size and Grow‐out Survival Rate in a Genetic Selected Population of Pacific White Shrimp Penaeus (Litopenaeus) vannamei
Author(s) -
de los RíosPérez Lidia,
CamposMontes Gabriel R.,
MartínezOrtega Alfonso,
CastilloJuárez Héctor,
Montaldo Hugo H.
Publication year - 2015
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/jwas.12169
Subject(s) - inbreeding , litopenaeus , biology , shrimp , zoology , population , penaeus , selective breeding , broodstock , genetics , ecology , demography , fishery , aquaculture , fish <actinopterygii> , sociology
The objective of this study was to investigate the effect of inbreeding on body weight (BW) at harvest size (130 d of age) and grow‐out survival rate (SR) (65–130 d of age) in a nucleus breeding population of Penaeus (Litopenaeus) vannamei . An experiment was designed to generate inbred families the product of sibling matings, as well as groups of families with different inbreeding coefficients in three successive generations. The families came from 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 produced. Data were analyzed using mixed linear model methodology and restricted maximum likelihood methods. Estimated change on BW per 10% increase on the inbreeding coefficient was −2.19 ± 0.41% ( P <0.001) relative to the mean of non‐inbred shrimp predicted from the model (19.63 g). Regression coefficient for grow‐out SR on inbreeding was not significant. Estimated change in SR per 10% increase on the inbreeding coefficient was −0.009 ± 0.006% ( P = 0.108) relative to the mean of non‐inbred shrimp predicted from the model (81.72%). It is important to control inbreeding level in breeding programs.