Spawning and early ontogenesis of the littoral polychaete Namanereis littoralis (Grube, 1876) (Nereididae, Namanereidinae)

Spawning and early ontogenesis of the littoral polychaete Namanereis littoralis (Grube, 1876)... For the first time, under laboratory conditions, development of the polychaete Namanereis littoralis (Grube, 1876) is investigated. Under conditions of the Sea of Japan, its reproduction occurs in July and is confined to the season of monsoon rains. Fertilization is external. Spawning manifests no epitocous transformations. Fecundity is low, ovicells are rich in yolk, and development is nonpelagic, lecithotrophic, embryonized, characterized by a high rate—5–8 days—and occurs in mucous clutches up to hatching of benthic juveniles. Temperature and salinity optima of development are 22–27°C and 16–21‰, respectively, characterizing the species as subtropical brackish-water by its origin. Archaic and specialized traits are noted in the early ontogenesis of N. littoralis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Developmental Biology Springer Journals

Spawning and early ontogenesis of the littoral polychaete Namanereis littoralis (Grube, 1876) (Nereididae, Namanereidinae)

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2011 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Developmental Biology; Animal Anatomy / Morphology / Histology
ISSN
1062-3604
eISSN
1608-3326
D.O.I.
10.1134/S1062360411030064
Publisher site
See Article on Publisher Site

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