Induction of larval settlement and metamorphosis ofHaliotis discus hannai Ino (Gastropoda,Mollusca) |
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| Authors: | Yang Yu Wu Bao-ling |
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| Institution: | (1) First Institute of Oceanography, SOA, 266004 Qingdao;(2) Present address: The Department of Biology, Hong Kong University of Science and Technology, Hong Kong |
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| Abstract: | Conspecific foot mucus, excessive K+] and gamma-aminobutyric acid (GABA) showed different metamorphosis-inductive effect on the veliger ofHaliotis discus hannai. The inductive effect of excessive K+] and GABA was developmental stage-dependent and dose-dependent, while that of conspecific foot mucus was only developmental
stage-dependent. At 20°C the veliger larvae became competent within 4 days after fertilization.H. discus hannai larvae showed gregarious settlement pattern on the conspecific foot mucus under the conditions of either presence or absence
of KCl or GABA. The present studies showed that the effect of conspecific foot mucus on abalone larvae metamorphosis could
be dose-independent. |
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| Keywords: | Haliotis discus hannai veliger settlement metamorphosis inducer |
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