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Reproductive biology of the holothurian Holothuria tubulosa (Echinodermata) in the Adriatic Sea

Published online by Cambridge University Press:  01 April 2004

Marija Despalatović
Affiliation:
Laboratory for Benthos, Institute of Oceanography and Fisheries, šet. I. Meštrovića 63, 21000 Split, Croatia
Ivana Grubelić
Affiliation:
Laboratory for Benthos, Institute of Oceanography and Fisheries, šet. I. Meštrovića 63, 21000 Split, Croatia
Ante šimunović
Affiliation:
Laboratory for Benthos, Institute of Oceanography and Fisheries, šet. I. Meštrovića 63, 21000 Split, Croatia
Boris Antolić
Affiliation:
Laboratory for Benthos, Institute of Oceanography and Fisheries, šet. I. Meštrovića 63, 21000 Split, Croatia
Ante Žuljević
Affiliation:
Laboratory for Benthos, Institute of Oceanography and Fisheries, šet. I. Meštrovića 63, 21000 Split, Croatia
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Abstract

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The reproductive cycle of a local population the aspidochirote Holothuria tubulosa in Kaštela Bay (Adriatic Sea) was analysed from July 1994 to August 1995 by histological examination and observations of macroscopic features of the gonads. Five gonadal stages were described: recovery stage, growing stage, mature stage, spawning stage, and post-spawning stage. The distinguishing features used to describe gonad stages in both sexes included the main features of reproductive cells and gonad wall. The reproductive cycle showed a clear annual pattern and was synchronous in both sexes. Spawning occurred during the warm season, from July to September, when the surface water temperature ranged from about 22°C to 26°C. From October to January individuals were in resting phase and had no gonads. In both sexes, variations in maturity indices were related to the seasonal changes in temperature.

Type
Research Article
Copyright
2004 Marine Biological Association of the United Kingdom