Comparison of growth, energy budget of Southern-China-cultured Stichopus japonicus fed with three types of sediment-feeds
WANG Yang, ZHENG Zhong-ming*, ZHOU Chao-sheng, JING Chun-hua
1. Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Ningbo University, Ningbo 315211, China; 2. Zhejiang Mariculture Research Institute, Key Laboratory of Exploitation and Preservation of Coastal Bio-resource, Wenzhou 325005, China
We investigated the feeding rate, absorption efficiency and energy budget of Southern-China-cultured Stichopus japonicus fed with three different sediments (from sea area, shrimp-culture pond and artificial sediments) to understand the influence of sediments on s Southern-China-cultured. The results demonstrated that there was no significant difference in the feeding rate among 3 types of sediments (P>0.05) when S. japonicus acclimatized in southern China was with 26.11±1.5 g weight under temperature of 17±1℃. Assimilation efficiency and SGR in artificial sediments and shrimp-culture pond groups were significantly higher than in the sea area group (P＜0.05). Meanwhile, the greatest assimilation efficiency and SGR occurred in the shrimp culture pond sediments group. Through researching on the equation of the energy budget in different groups, we found that the metabolic energy in different groups had no significant difference (P>0.05). The ratio of growth energy in shrimp-culture pond group was significantly greater than another two groups (P<0.05). The energy budget equation could be concluded as 100C=12.35R+34.91G+8.05UF+44.69R. The research indicated that using sediments of shrimp pool under certain breeding circumstance, FR of S. japonicus distributed more to growth and the growth rate was comparatively high. Therefore, it is advisable to use sediments of shrimp pool to feed S. japonicus.Therefore, using sediments of shrimp pool to feed S. japonicus was apparently an advisable model.
