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Larval and postlarval development of Pagurus nigrofascia (Decapoda: Anomura: Paguridae) reared in the laboratory

Published online by Cambridge University Press:  15 December 2006

Takashi Oba
Affiliation:
Hokkaido University, Research Faculty of Fisheries Science, Minato-cho, Hakodate 041-8611, Japan
Kooichi Konishi
Affiliation:
National Research Institute of Aquaculture, Fisheries Research Agency, Minami-ise, Mie 516-0193, Japan
Seiji Goshima
Affiliation:
Hokkaido University, Research Faculty of Fisheries Science, Minato-cho, Hakodate 041-8611, Japan

Abstract

Zoeal, megalopal and first crab stages of Pagurus nigrofascia are described and illustrated from laboratory reared specimens. Larvae were reared at temperatures 6°C, 12°C, 18°C, and 25°C. Survival rates of larvae were considerably higher at 12°C and 18°C, but were low at 6°C and 25°C. Larvae and postlarvae of P. nigrofascia can be distinguished from seven morphologically similar species based on adult or larval morphological features. Zoeal stages of this species are distinguished by, for example, setal formulae of maxillule, maxilla and maxilliped 1. The megalopal stage can be identified by the telsonal process, the number of articles of the flagellum of antenna and setal formula on the scaphognathite of the maxilla. Morphological features of P. nigrofascia larvae are similar to those of P. ochotensis, P. kennerlyi and P. pectinatus.

Type
Research Article
Copyright
2006 Marine Biological Association of the United Kingdom

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