The annual reproductive cycle of achaetobonellia maculata echiura bonellidae

Singhal, R.N.

Proceedings of the Indian Academy of Sciences Animal Sciences 91(6): 569-576


Accession: 006600630

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The annual reproductive cycle of A. maculata Fisher is described. Oocytes 1st appear in the coelomic fluid in late spring or early summer. During fall and winter, gametes production and differentiation continue. Differentiation of gametes lasts 4-6 mo. Spawning occurs in spring. Since the males are the permanent residents in the gonoduct of the female, the fertilization is internal in Bonellidae. Temperature of the sea water is probably the most important exogenous factor controlling the reproductive cycle. Individuals reach sexual maturity when they are 1 yr old.