BIOTIC Species Information for Patella ulyssiponensis
Researched byKen Neal & Marie Skewes Data supplied byMarLIN
Refereed byThis information is not refereed.
Reproduction/Life History
Reproductive typeProtandrous hermaphrodite
Developmental mechanismPlanktotrophic
Reproductive SeasonAugust to October Reproductive LocationInsufficient information
Reproductive frequencyAnnual episodic Regeneration potential No
Life span11-20 years Age at reproductive maturity3-5 years
Generation time3-5 years FecundityInsufficient information
Egg/propagule sizeInsufficient information Fertilization typeInsufficient information
Larval/Juvenile dispersal potential>10km Larval settlement periodInsufficient information
Duration of larval stage2-10 days   
Reproduction Preferences Additional InformationMaturation of gonads begins in May/June and all mature individuals have ripe gonads by mid-August. Spawning occurs in October and is believed to be triggered by strong gales (Thompson, 1979). The sex ratio of this species varies with size of individual. For example, at 20 mm shell length, all mature individuals are male, while from 20 mm to full size the number of females increases until at 55 mm around 70% of the mature individuals are female (Thompson, 1979).
Reproduction References Thompson, 1979,
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