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Effects of including shrimp protein hydrolysate in practical diets on the growth and survival of redclaw crayfish hatchlings Cherax quadricarinatus ( V on M artens, 1868)
Author(s) -
ArredondoFigueroa José Luis,
PoncePalafox Jesús Trinidad,
ShiraiMatsumoto Keiko,
PérezZavaleta Ángel,
BarrigaSosa Irene De Los Ángeles,
Ruiz Luna Arturo
Publication year - 2013
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/j.1365-2109.2012.03102.x
Subject(s) - hatchling , cherax quadricarinatus , crayfish , biology , shrimp , zoology , fishery , meal , feed conversion ratio , body weight , food science , hatching , endocrinology
An experiment was carried out to analyse the effects of substituting fish‐meal ( FM ) with soya bean meal and shrimp protein hydrolysate ( SPH ) on the percent survival, growth rate, feed efficiency and molt frequency of redclaw crayfish hatchlings, Cherax quadricarinatus . The experiment was performed in a closed recirculating‐water system over a 56‐day period. Five diets were tested: a control diet ( SPH 0 ) comprising 100% FM without SPH , and four diets with 2.5%, 5.0%, 10.0% and 15.0% SPH substitution (diets SPH 2.5 , SPH 5 , SPH 10 and SPH 15 respectively). Analysis of water quality indicated that it was adequate to maintain a good growth and survival of hatchlings. The results showed that 100% survival was obtained for hatchlings fed with SPH 5 , SPH 10 and SPH 15 diets. Higher mean values of final weight were obtained for the SPH 5 diet. The highest weight gain was observed in SPH 2.5 and SPH 5 diets. Hatchlings showed similar specific growth rates for all diets. The efficiency rate of the SPH 15 diet was lower compared to the other diets. Overall, individual feed consumption was higher in hatchlings fed diets of SPH 5 and SPH 15 . It is recommended that 5.0% of SPH could be included in diets of hatchling redclaw crayfish to improve their growth efficiency.