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Effects of diatom concentration in prepared feeds on growth and energy budget of the sea cucumber A postichopus japonicus ( S elenka)
Author(s) -
Shi Ce,
Dong Shuanglin,
Pei Surui,
Wang Fang,
Tian Xiangli,
Gao Qinfeng
Publication year - 2015
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.12206
Subject(s) - biology , diatom , apostichopus japonicus , sea cucumber , dry matter , zoology , dry weight , organic matter , feces , food science , fish meal , botany , ecology , fishery , fish <actinopterygii>
Eight test diets were used in the experiment: seven fresh diatom ( C ylindrotheca fusiformis ) diets in which diatom occupied 100%, 83.3%, 50%, 33.3%, 20%, 14.3% and 11.1% in dry matter of the feeds (marked as D100, D83, D50, D33, D20, D14 and D11), and a formulated diet (70% S argassum thunbergii powder, 20% sea mud and 10% fish meal, based on dry weight, marked as ST ). The results showed that the specific growth rates ( SGR s) of the animals fed diets D33, D20, D14 and D11 were not significantly different from the SGR of those fed diet ST . However, the energy allocated to growth for the animals fed with diet D14 was twice that of diet ST . For sea cucumbers fed diet D14 the largest expenditure part was allocated to respiration (55.4%), but for those fed diet ST , the largest part was allocated to faeces (62.7%). The organic content of diet D14 was also much lower than that of diet ST . Frozen diatom diets containing 14% (dry matter weight) fresh diatom could be an environmentally friendly feed as an alternative option for macroalgae powder.