In vivo Effects of a Recombinant Molt-Inhibiting Hormone on Molt Interval and Hemolymph Ecdysteroid Level in the Kuruma Prawn, Marsupenaeus japonicus

Takuji Okumura; Tsuyoshi Ohira; Hidekazu Katayama; Hiromichi Nagasawa

doi:10.2108/zsj.22.317

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1 March 2005 In vivo Effects of a Recombinant Molt-Inhibiting Hormone on Molt Interval and Hemolymph Ecdysteroid Level in the Kuruma Prawn, Marsupenaeus japonicus

Takuji Okumura, Tsuyoshi Ohira, Hidekazu Katayama, Hiromichi Nagasawa

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Zoological Science, 22(3):317-320 (2005). https://doi.org/10.2108/zsj.22.317

Abstract

In order to determine the function of molt-inhibiting hormone (MIH) in vivo, we examined the effects of injecting of a recombinant MIH on the molt interval and hemolymph ecdysteroid level in the kuruma prawn, Marsupenaeus japonicus. The injection of recombinant MIH significantly prolonged the molt interval (9.0±0.4 days in the control group, 9.5±0.5 days in the 2500 ng/g-body weight/injection-group, mean±SD), and significantly decreased the hemolymph ecdysteroid level (ratio of levels between after and before injection: 1.94±1.09 in the control and 1.28±0.39 in the 3000 ng/g-body weight/injection-group, mean±SD). These results conclusively show the inhibitory effects of MIH on molting in vivo.

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Takuji Okumura, Tsuyoshi Ohira, Hidekazu Katayama, and Hiromichi Nagasawa "In vivo Effects of a Recombinant Molt-Inhibiting Hormone on Molt Interval and Hemolymph Ecdysteroid Level in the Kuruma Prawn, Marsupenaeus japonicus," Zoological Science 22(3), 317-320, (1 March 2005). https://doi.org/10.2108/zsj.22.317

Received: 16 October 2004; Accepted: 1 December 2004; Published: 1 March 2005

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