摘要
Conspecific foot mucus,excessive[K^+] and gamma-aminobutyric acid (GABA) showed different metamorphosis-inductive effect on the veliger of Haliotis discus hannai.The inductive effect of excessive [K^+]and GABA was developmental stage-dependent and dose-dependent,while that of conspecific foot mu-cus was only developmental stage-dependent.At 20℃ the veliger larvae became competent within 4 daysafter fertilization H.discus hannai larvae showed gregarious settlement pattern on the conspecific foot mu-ous under the conditions of either presence or absence of KCI or GABA.The present studies showed that the effect of conspecific foot mucus on abalone larvae metarnorphosis could be dose-independent.
Conspecific foot mucus, excessive [K+] and gamma-aminobutyric acid (GABA) showed different metamorphosis-inductive effect on the veliger of Haliotis discus hannai. The inductive effect of excessive [K^+] and GABA was developmental stage-dependent and dose-dependent, while that of oonspecific foot mu-cus was only developmental stage-dependent. At 20℃the veliger larvae became competent within 4 days after fertilization. H. discus hannai larvae showed gregarious settlement pattern on the conspecific foot mu-cus under the conditions of either presence or absence of KC or GABA. The present studies showed that the effect of conspecific foot mucus on abalone larvae metamorphosis could be dose-independent.
