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Fig. 25. Correlation between gonadosomatic index (GSI) and hemolymph levels of estradiol-17β, estriol, progesterone, testosterone, and 11-ketotestosterone in female Marsupenaeus japonicus under the natural reproductive cycle. Undetectable levels are shown as 0 pg/mL. Dashed lines indicate the limit of detection. Reprinted with permission from Fisheries Science, 70, Okumura and Sakiyama, Hemolymph levels of vertebrate-type steroid hormones in female kuruma prawn Marsupenaeus japonicus (Crustacea: Decapoda: Penaeidae) during natural reproductive cycle and induced ovarian development by eyestalk ablation, 372–380, Fig. 1, © 2004, The Japanese Society of Fisheries Science.

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