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Synchronized spawning of abalone Haliotis diversicolor triggered by typhoon events in Sagami Bay, Japan
Marine Ecology Progress Series
To elucidate the external cues triggering spawning of Haliotis diversicolor, changes in the gonads of adults and the occurrence of newly settled post-larvae were monitored from 2001 to 2004 in Sagami Bay, Japan. The gonad index (GI) and gonad somatic index (GSI) of both sexes began to increase between April and June 2002, peaked in September, and then decreased significantly by early October. In other years, GI and GSI were significantly lower in autumn. Between June and September in each year,doi:10.3354/meps07150 fatcat:fi7pzzihcfagxcozfsx34l3jue