Premium
Effect of light limitation on the water quality, bacterial counts and performance of Litopenaeus vannamei postlarvae reared with biofloc at low salinity
Author(s) -
EsparzaLeal Héctor M,
LópezÁlvarez Ely S,
PoncePalafox Jesús T,
MelendrezSoto Josué A,
MedinaAstorga Marco A,
LunaGonzález Antonio,
ValenzuelaQuiñónez Wenceslao,
ÁlvarezRuiz Píndaro,
RodríguezQuiroz Gerardo
Publication year - 2017
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.13260
Subject(s) - litopenaeus , shrimp , biology , darkness , salinity , zoology , vibrio , food science , sunlight , fishery , veterinary medicine , botany , ecology , bacteria , medicine , genetics , physics , astronomy
The aim of this study was to evaluate the effect of light limitation on the water quality, bacterial counts and performance of Litopenaeus vannamei postlarvae reared with biofloc at low salinity (≈9 g L −1 ). Two treatments were designed: T 1 = culture with natural sunlight and T 2 = culture in darkness. After 28 days, in both treatments, the final weight of shrimp was over 0.6 g with a specific growth rate over 7.4% d −1 , and a survival rate over 70%. In both treatments, Vibrio sp. concentration presented low values (culture with natural sunlight = 0.1 to 9.9 × 10 2 CFU mL −1 , culture in darkness = 0.4 to 11.7 × 10 2 CFU mL −1 ) and Bacillus sp. had high values (culture with natural sunlight = 0.7 to 66.0 × 10 4 CFU mL −1 , culture in darkness = 0.7 to 65.8 × 10 4 CFU mL −1 ). All water quality parameters remained within the ranges suitable for shrimp culture, except for alkalinity during the first stage of the study. Although in some sampling periods some significant differences were found in bacterial counts and water quality parameters, shrimp productive performance under culture with biofloc at low salinity was not affected significantly by light limitation.