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NAUPLIAR DEVELOPMENT OF METRIDIA PACIFICA (COPEPODA: CALANOIDA) REARED IN THE LABORATORY

NAUPLIAR DEVELOPMENT OF METRIDIA PACIFICA (COPEPODA: CALANOIDA) REARED IN THE LABORATORY Knowledge of naupliar morphology is very important for studies of stage-dependent bi- ological and ecological phenomena. Larval walleye pollock (Theragra chalcogramma Pallas) in the southeastern Bering Sea are very selective in the species of copepods and developmental stages that they eat. They pre- fer nauplii of Metridia, although these nau- plii are relatively rare (Hillgruber et al., 1995). As part of a study of biological and physical variability that influences recruit- ment of walleye pollock in the southeastern Bering Sea, I describe the naupliar stages of Metridia pacific Brodsky, 1950, and those diagnostic features that facilitate their iden- tification. MATERIALS AND METHODS Adult copepods were sorted from samples collected in the Aleutian Basin of the southeastern Bering Sea and shipped to the Seward Marine Center Laboratory. Females were maintained in separate containers with fresh sea wa- ter in a temperature controlled room at 3°C. The cope- pods were fed ad libitum a mixture of autotrophic fla- gellates (Isochrysis galbana Parke and Tetraselmis sue- cica (Kylin) Butcher) and the diatom Chaetoceros calcitrans (Paulsen) Takano. Artemia sp. reared for 2 weeks with the above flagellates were added to the mix- ture. During the fall of 1995 and the winter of http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Crustacean Biology Brill

NAUPLIAR DEVELOPMENT OF METRIDIA PACIFICA (COPEPODA: CALANOIDA) REARED IN THE LABORATORY

Journal of Crustacean Biology , Volume 17 (2): 343 – Jan 1, 1997

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Publisher
Brill
Copyright
Copyright 1997 by Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0278-0372
eISSN
1937-240X
DOI
10.1163/193724097X00369
Publisher site
See Article on Publisher Site

Abstract

Knowledge of naupliar morphology is very important for studies of stage-dependent bi- ological and ecological phenomena. Larval walleye pollock (Theragra chalcogramma Pallas) in the southeastern Bering Sea are very selective in the species of copepods and developmental stages that they eat. They pre- fer nauplii of Metridia, although these nau- plii are relatively rare (Hillgruber et al., 1995). As part of a study of biological and physical variability that influences recruit- ment of walleye pollock in the southeastern Bering Sea, I describe the naupliar stages of Metridia pacific Brodsky, 1950, and those diagnostic features that facilitate their iden- tification. MATERIALS AND METHODS Adult copepods were sorted from samples collected in the Aleutian Basin of the southeastern Bering Sea and shipped to the Seward Marine Center Laboratory. Females were maintained in separate containers with fresh sea wa- ter in a temperature controlled room at 3°C. The cope- pods were fed ad libitum a mixture of autotrophic fla- gellates (Isochrysis galbana Parke and Tetraselmis sue- cica (Kylin) Butcher) and the diatom Chaetoceros calcitrans (Paulsen) Takano. Artemia sp. reared for 2 weeks with the above flagellates were added to the mix- ture. During the fall of 1995 and the winter of

Journal

Journal of Crustacean BiologyBrill

Published: Jan 1, 1997

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