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
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- OKUMURA TAKUJI
- National Research Institute of Aquaculture, Fisheries Research Agency
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- SAKIYAMA KAZUTAKA
- Momoshima National Center for Stock Enhancement, Fisheries Research Agency
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抄録
The occurrence of vertebrate-type steroid hormones in the hemolymph and ovaries has been reported in several crustacean species; however, their physiological roles are not sufficiently understood. In the present study, correlations between hemolymph levels of the vertebrate-type steroid hormones and ovarian development in female kuruma prawn Marsupenaeus japonicus were examined. In the first experiment, hemolymph samples were taken in November (non-reproductive period) and June (maturing and spawning period) and the hemolymph levels of estradiol-17β, estriol, progesterone, testosterone, and 11-ketotestosterone were found not to be significantly related to the ovarian development (gonadosomatic index, 0.80-9.39). In the second experiment, ovarian development was induced by bilateral eyestalk ablation in the non-reproductive period. The hemolymph levels of estradiol-17β, estriol, and progesterone did not significantly differ between the control female prawn and the eyestalk-ablated female prawn, which underwent vitellogenesis. If the examined steroid hormones were vitellogenesis-stimulating hormones as in fish, their hemolymph levels would be expected to show significant correlations with ovarian development. However, the present study found no significant correlations between hormone levels and ovarian development. This suggests that based on the available data, the examined vertebrate-type steroid hormones do not play an important role in ovarian development in M. japonicus.
収録刊行物
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- Fisheries science
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Fisheries science 70 (3), 372-380, 2004
公益社団法人 日本水産学会
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詳細情報 詳細情報について
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- CRID
- 1390282679404685696
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- NII論文ID
- 130003904077
- 10012363447
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- NII書誌ID
- AA10993718
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- ISSN
- 14442906
- 09199268
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- NDL書誌ID
- 6974859
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 使用不可