Effects of Artemia nauplii density on survival, development and feeding of larvae of the horsehair crab Erimacrus isenbeckii (Crustacea, Decapoda, Brachyura) reared in the laboratory
2005
Jinbo, T.(National Research Inst. of Fisheries Science, Yokohama (Japan)) | Hamasaki, K. | Ashidate, M.
This study was conducted to examine the effects of prey (Artemia nauplii) density on survival, development and feeding of the horsehair crab Erimacrus isenbeckii larvae. Six levels of prey densities (0, 0.25, 0.5, 1, 2, 4 individual (ind.) /mL) were examined for their effects on survival, developmental period from hatching required to reach each larval stage, and growth of larvae. The number of prey consumed per larva per day was determined at five levels of prey densities (0.25, 0.5, 1, 2, 4 ind./mL) at the first, third and fifth zoeal stages. Survival rates increased with high prey density, and survival rates at the first crab stage were significantly higher at 2-4 ind./mL than at 0-0.5 ind./mL (P 0.05). The number of days required to reach each stage was lower as prey density levels increased, and was significantly lower at 2
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