Description of Naupliar Stages in Acartia steueri Smirnov (Copepoda: Calanoida)

Nobutaka Okada; Yasuko Onoue; Bin Haji Ross Othman; Tomohiko Kikuchi; Tatsuki Toda

doi:10.1651/08-2982.1

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Nobutaka Okada,¹ Yasuko Onoue,¹ Bin Haji Ross Othman,² Tomohiko Kikuchi,³ Tatsuki Toda¹

¹(NO, YO, TT) Department of Environmental Engineering for Symbiosis, Faculty of Engineering, Soka University, 1-236 Tangi-cho, Hachioji, Tokyo, 192-8577, Japan
²(BHRO) Marine Ecosystem Research Centre, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
³(TK) Department of Hydrographic Science, Faculty of Education and Human Sciences, Yokohama National University, 79-1 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa, 240-8501, Japan; [Corresponding author (TT): ] toda@soka.ac.jp

Abstract

The six naupliar stages of Acartia (Acanthacartia) steueri Smirnov, a calanoid copepod of the family Acartiidae, are described by both light microscopy and scanning electron microscopy. Each stage is discriminated by the number of setae on the distal segment of the antennule. The nauplii of A. steueri can be distinguished from those of two con-subgeneric species, Acartia (A.) californiensis Trinast and A. (A.) bifilosa Giesbrecht, by both the combination and the constancy in all naupliar stages of the exopodal setal counts of the antenna and mandible.

Citation Download Citation

Nobutaka Okada, Yasuko Onoue, Bin Haji Ross Othman, Tomohiko Kikuchi, and Tatsuki Toda "Description of Naupliar Stages in Acartia steueri Smirnov (Copepoda: Calanoida)," Journal of Crustacean Biology 29(1), 70-78, (1 February 2009). https://doi.org/10.1651/08-2982.1

Received: 22 January 2008; Accepted: 1 May 2008; Published: 1 February 2009