Effects of dietary protein level and source on the growth and survival of two genetic lines of specific-pathogen-free Pacific white shrimp, Penaeus vannamei

An eight-week trial compared the performances of two genetic lines of Penaeus vannamei, T-line and G-line, fed with different levels and sources of dietary protein. Both lines were originated from the same founder populations but had gone through genetic selection targeting different breeding goals...

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Bibliographic Details
Published in:Aquaculture 2012-03, Vol.338-341, p.118-123
Main Authors: Gong, Hui, Jiang, Donghuo, Alig, Frank, Lawrence, Addison L.
Format: Article
Language:English
Subjects:
Aquaculture
crude protein
Decapoda
Diet
Dietary protein level
digestible energy
disease resistance
feeding level
feeds
fish
founder effect
Genetic line
genetic lines
genetic relationships
genetic techniques and protocols
Genetics
Litopenaeus vannamei
Marine
microsatellite repeats
Penaeidae
Penaeus vannamei
plant proteins
Protein source
protein sources
Proteins
Shellfish
shrimp
soy protein isolate
soybeans
squid
survival rate
tanks
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Summary:An eight-week trial compared the performances of two genetic lines of Penaeus vannamei, T-line and G-line, fed with different levels and sources of dietary protein. Both lines were originated from the same founder populations but had gone through genetic selection targeting different breeding goals for more than four generations. T-line was bred for fast growth and Taura syndrome viral disease resistance, and G-line was bred for fast growth and production yield under super-high density. Five dietary treatments were employed: two commercial diets and three semipurified diets (A, B, and C). The semipurified diets were formulated at similar levels of digestible energy. Diet A contained 35% crude protein (CP), from marine meals (fish, 15%, and squid, 15%). Diet C contained 35% CP from a reduced marine protein level from fish (11.5%) and squid meals (11.5%). Diet B contained only 20% CP but had the same level of marine protein as diet C. The two commercial shrimp feeds, containing 35% and 40% protein, served as reference diets. Three replicate tanks per dietary treatment were used. Each tank was stocked with 50 tagged shrimp (25 each of T-line and G-line) and 100 untagged shrimp, with average initial weight (IWT) of 10.4g, at a density of 107/m2. Diet significantly affected shrimp growth (p
ISSN:0044-8486
1873-5622
DOI:10.1016/j.aquaculture.2012.01.030