한국수산과학회

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  • pISSN : 2234-8395
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  • eISSN : 2234-1757

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kfas, vol. 53, no. 1, pp.132-138, February, 2020
DOI. https://doi.org/10.5657/KFAS.2020.0132

Effects of Substrate Sizes and Organic Contents on Larval Settlement
and Growth in the Early Stage of the Polychaete Marphysa sanguinea
바위털갯지렁이(Marphysa sanguinea) 유생의 착저와 초기 성장에 미치
는 기질 크기 및 유기물 함량

와와푸·김성균·김창훈*
부경대학교 해양바이오신소재학과

Marphysa sanguinea is the most well-known polychaete species with a high economic value. However, this species
has a high mortality in the early rearing stage of aquaculture. This study was conducted to find out the optimal substrate
size and organic contents for the growth and survival rate of M. sanguinea larvae and juveniles. It was observed
that the smaller grain size (<Ø 0.063 mm) and high organic contents (5-10%) induced settlement and reduced settlement
time of larvae. Moreover, the growth and survival rate of larvae reached high levels at Ø 0.004-0.016 mm of
grain sizes and 5-7.5% of organic contents as advantageous substrates for settlement. The survival rate of juveniles
reached over 90% in less than Ø 0.016 mm substrate on 15-day experiment for different grain sizes of substrates.
These results indicated that substrate compositions of less than Ø 0.016 mm of sand size and 5-7.5% of organic contents
in mud will enhance the productivity of M. sanguinea at the early stage.

Keyword : Marphysa sanguinea, Larval settlement, Growth, Substrate size, Organic contents

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