Study of the filiform gonads of walleye pollock Theragra chalcogramma inhabiting the Sea of Okhotsk and the Bering Sea
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- 作者：K. A. Zhukova ; S. S. Ponomarev
- 关键词：walleye pollock Theragra chalcogramma ; histology ; abnormal gonads ; reproductive biology ; Sea of Okhotsk ; Bering Sea
- 刊名：Journal of Ichthyology
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：56
- 期：5
- 页码：752-759
- 全文大小：1,016 KB
- 刊物主题：Zoology;
- 出版者：Springer US
- ISSN：1555-6425
- 卷排序：56
文摘
The histological study of the adult specimens of walleye pollock Theragra chalcogramma carrying filamentous gonads evidenced that this group comprised males, females, and sterile fish. The specimens carrying the filamentous gonads have been found mostly in the elder age groups; no maturing of the oocytes or sperm cells has been registered. The frequency of occurrence of such specimens was relatively low: 0.07–0.13% in the Sea of Okhotsk and up to 0.25% in the Bering Sea. We conclude that these specimens have nearly no effect on the reproductive success of this species.