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- Title
Sexual and asexual reproduction ofAllostichaster capensis(Echinodermata: Asteroidea) in Golfo Nuevo.
- Authors
Rubilar, Tamara; Pastor de Ward, Catalina T.; Díaz de Vivar, María E.
- Abstract
Sexual and asexual reproduction of the fissiparous starfishAllostichaster capensiswere examined for 24 months at Bahía Kaiser, Golfo Nuevo, Chubut, Argentina. Gonad indices revealed an annual reproductive cycle, with peak development occurring in late winter (August). Spawning occurred in spring (September). Pyloric caeca indices displayed a clear annual cycle and a reciprocal relationship with gonad indices, showing the storage function of pyloric caeca. The starfish population appears to be largely maintained by fission, as only two females were found.A. capensisalso showed an annual cycle of fission, with the highest frequency in spring and summer (from November to January), just after spawning. Incidence of fission was correlated with environmental factors such as photoperiod, seawater temperature, and salinity.
- Subjects
NEW Gulf (Argentina); ARGENTINA; ECHINODERMATA; REPRODUCTION; SPAWNING; BIOLOGY
- Publication
Marine Biology, 2005, Vol 146, Issue 6, p1083
- ISSN
0025-3162
- Publication type
Article
- DOI
10.1007/s00227-004-1530-4