BIOTIC Species Information for Gammarus insensibilis
Researched byNicola White Data supplied byMarLIN
Refereed byDr Martin Sheader
Reproduction/Life History
Reproductive typeGonochoristic
Developmental mechanismDirect Development
Reproductive SeasonAll year with summer peak Reproductive LocationInsufficient information
Reproductive frequencyAnnual protracted Regeneration potential No
Life span<1 year Age at reproductive maturity<1 year
Generation time<1 year Fecundity11-100
Egg/propagule sizeInsufficient information Fertilization typeInsufficient information
Larval/Juvenile dispersal potentialNot relevant Larval settlement periodNot relevant
Duration of larval stageNot relevant   
Reproduction Preferences Additional InformationReproduction continues throughout the year with peak reproductive activity in the warm summer months in the UK. In France, life span varies from 48 to 408 days according to the water temperature when born (Janssen et al., 1979). Those born in the winter develop 4 to 5 times slower than those born in the summer. Egg incubation time also increases with a reduction in water temperature from 7 days in summer to 50 days in winter.
Reproduction References Janssen et al., 1979,
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