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The effects of different Ca 2+ concentration fluctuation on the moulting, growth and energy budget of juvenile Litopenaeus vannamei (Boone)
Author(s) -
Hou Chunqiang,
Wang Fang,
Dong Shuanglin,
Zhu Yujie
Publication year - 2011
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.1365-2109.2010.02737.x
Subject(s) - shrimp , litopenaeus , moulting , biology , zoology , juvenile , seawater , growth rate , crustacean , fishery , ecology , larva , geometry , mathematics
A 40‐day experiment was conducted to investigate the effects of different Ca 2+ concentration fluctuation on the moulting, growth and energy budget of juvenile Litopenaeus vannamei with an initial wet body weight of (1.20±0.01) g. The Ca 2+ concentration of the control group C385 was 385 mg L −1 throughout the experiment, while the Ca 2+ concentration of the C591, C803, C1155 and C2380 groups periodically fluctuated from 385 to 591, 803, 1155 and 2380 mg L −1 respectively. The moulting frequency (MF) of the shrimp in the Ca 2+ concentration fluctuating groups was significantly higher than those in the control group ( P <0.05). The specific growth rates (SGR d ) and feed intake of the shrimp in the C591 and C803 groups were significantly higher than those in other groups ( P <0.05), but no significant differences in feed efficiency were found among all groups ( P >0.05). The shrimp in C591 and C803 groups spent significantly less energy in respiration, while depositing significantly more energy for growth than those in other three groups ( P <0.05). These results showed that proper Ca 2+ concentration fluctuation could increase the MF and growth rate of the juvenile L. vannamei , and according to the regression formula made using SGR d and range of Ca 2+ concentration fluctuation, periodically enhanced Ca 2+ concentration of 295 mg L −1 in the seawater was suggested to be used in shrimp culture.