BIOTIC Species Information for Cirratulus cirratus
|Researched by||Lizzie Tyler||Data supplied by||University of Sheffield|
|Refereed by||This information is not refereed.|
|Reproductive Season||Asynchronous reproduction||Reproductive Location||Sediment surface|
|Reproductive frequency||Biannual episodic||Regeneration potential||No|
|Life span||6-10 years||Age at reproductive maturity||1-2 years|
|Generation time||1-2 years||Fecundity|
|Egg/propagule size||150 µm diameter||Fertilization type||Insufficient information|
|Reproduction Preferences Additional Information||Reproduction in Cirratulus cirratus is asynchronous i.e. it is not entrained to any of the seasons and members of the population are at different stages of reproductive development at any one time (Garwood, 1982; Gibbs, 1971). Oocytes are 150 µm in diameter and once fertilized are deposited in a jelly mass on the surface of rocks (Petersen, 1999). The eggs hatch as a ciliated post-trochophore after 6 days. The larvae are entirely benthic for the duration of their development, living off yolk for around 24 days after hatching and then commence adult style deposit feeding (Olive, 1970). Females can spawn 2-3 times in their lifetime and it takes 1-2 years after each spawning to mature a new clutch of oocytes (Olive, 1970). There are separate sexes, the males are white, females are lemon-yellow due to the colour of coelomic oocytes (Gibbs, 1971). Sex ratios vary and have been recorded as 1:1 (Olive, 1970) 1:1.7 and 1:2.8 (Gibbs, 1971).
Asexual reproduction by epitoky (clones growing from the posterior end of the worm) may occur in Cirratulus cirratus. However, the taxonomic status of Cirratulus is in constant review and epitokes may be formed by another species that has been erroneously identified as Cirratulus cirratus (Petersen, 1999).
|Reproduction References||Garwood, 1982, Olive, 1970, Gibbs, 1971, Petersen, 1999, George, 1968, George, 1971,|