Settlement and metamorphosis of Rapana venosa (Gastropoda: Muricidae) with implications for artificial culture

The rapa whelk Rapana venosa transforms from a phytophagous larva to a carnivorous juvenile after settlement and metamorphosis. The high mortality rate and low metamorphosis rate (<1%) of larvae are among the key factors limiting the recovery of the resources of R. venosa. We studied these two pr...

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Bibliographic Details
Published in:Journal of Oceanology and Limnology
Main Authors: Yu, Zhenglin, Yang, Meijie, Song, Hao, Hu, Zhi, Zhou, Cong, Wang, Xiaolong, Li, Haizhou, Zhang, Tao
Format: Report
Language:English
Published: SCIENCE PRESS 2020
Subjects:
larval development
substrate
oyster polysaccharide
commercial breeding
Marine & Freshwater Biology
Oceanography
Limnology
CRASSOSTREA-GIGAS
LARVAL SETTLEMENT
PACIFIC OYSTER
RED ABALONE
INDUCTION
GROWTH
CORAL
LIGHT
Pacific
Rapa
Crassostrea gigas
Pacific oyster
Online Access:http://ir.qdio.ac.cn/handle/337002/165375
https://doi.org/10.1007/s00343-019-9107-8
Description
Summary:The rapa whelk Rapana venosa transforms from a phytophagous larva to a carnivorous juvenile after settlement and metamorphosis. The high mortality rate and low metamorphosis rate (<1%) of larvae are among the key factors limiting the recovery of the resources of R. venosa. We studied these two processes and showed that the larva has the ability to settle and metamorphose in the middle and late 4 spiral whorl period, and the use of substrates (scallop shells with oysters) can significantly improve the settlement and metamorphosis rate of larvae. The presence of darkness, juvenile bivalve shellfish, and oyster polysaccharide could effectively increase the rates of larval settlement and metamorphosis. Our findings broaden the understanding of settlement and metamorphosis in gastropods and can be used to improve population control, resource recovery and commercial breeding strategies for R. venosa.

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