BIOTIC Species Information for Neocrania anomala
Researched byLizzie Tyler Data supplied byUniversity of Sheffield
Refereed byThis information is not refereed.
Reproduction/Life History
Reproductive typeGonochoristic
Developmental mechanismLecithotrophic
Reproductive SeasonApril to November Reproductive LocationWater column
Reproductive frequencyAnnual protracted Regeneration potential No
Life span6-10 years Age at reproductive maturity
Generation timeInsufficient information Fecundity
Egg/propagule size122.5 µm diameter Fertilization typeExternal
Larval/Juvenile dispersal potential100-1000m Larval settlement periodInsufficient information
Duration of larval stage2-10 days   
Reproduction Preferences Additional InformationLongevity is suspected to be between 8-10 years. There is no obvious sexual dimorphism although the colour of the gonads may be distinguishing. Testes are light coloured white, pink, cream or blue and ovaries are orange-brown. Egg diameter is 120-125 microns. The species is free-spawning and fertilization is external in the surrounding water column. The eggs are more dense than seawater hatching into a free-swimming larval stage. The larvae are fully developed within three days and settle out in no more than a few days. Most of the literature suggests that dispersal ability is not great. Although the species may inhabit areas with water flow rates of up to 3 knots, the often restricted and sheltered habitat such as sea lochs may reduce dispersal ability. The breeding season in western Scotland has been inferred from the presence of recently settled juveniles. The larva may be able to delay settlement if the initial substratum is unsuitable or the water is too deep.
Reproduction References James et al., 1992, Rowell, 1960, Long & Stricker, 1991,
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