Reproduction and annual gametogenic cycle in Nephtys hombergii and N. caeca (Polychaeta: Nephtyidae) |
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Authors: | P J W Olive |
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Institution: | (1) Department of Zoology, University of Newcastle upon Tyne, Newcastle upon Tyne, England;(2) Dove Marine Laboratory, University of Newcastle upon Tyne, Newcastle upon Tyne, England |
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Abstract: | The gametogenic cycles of Nephtys hombergii Audouin et M. Edw. and N. caeca Fabricius are described. Both species are polytelic (=discrete, iteroparous) and breed in their second and subsequent years. They spawn in May in the Tyne estuary. After spawning, N. hombergii retains a large number of gametocytes, which are ultimately resorbed. A new generation of gametocytes is proliferated by September and mature gametes accumulate during the winter months. Gametic development is not well synchronised. |
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