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Title
  • ja 北海道噴火湾におけるキュウリウオ雌魚の成熟
  • en Gonadal Maturation of Female Rainbow Smelt Osmerus eperlanus mordax in Funka Bay, Hokkaido
Creator
    • ja 井口, 謙 en Inokuchi, Ken
    • ja 高橋, 豊美 en Takahashi, Toyomi
Accessrights open access
Rights
  • ja © 1997 公益社団法人日本水産学会
  • en © 1997 The Japanese Society of Fisheries Science
Subject
  • Other en 噴火湾
  • Other ja キュウリウオ
  • Other en 成熟
  • Other en 卵群同期発達型
  • Other en 産卵期
  • NDC 663
Description
  • Abstract en Rainbow smelt Osmerus eperlanus mordax, were collected during May 1993 to April 1995 from Funka Bay, Hokkaido, and the Yamazaki and Rukotsu rivers, which flow into the western side of the bay. Ovarian eggs from females were examined histologically. Oocytes from the chromatin-nucleolus stage to the ripe stage were found in the ovaries. From May to August, females had immature oocytes in the yolkless stage and yolk vesicle stage. Postovulatory follicles were also found in the ovaries of females collected from the bay in May. After November, a bimodal distribution of egg diameter was observed. More advanced oocytes developed from the primary-yolk stage in November to the migratory-nucleus stage in April. These observations indicate that group-synchronous oocyte development occurred. All oocytes in the migratory-nucleus stage from females collected by set nets in the coastal area off Mori were found in late April. From late April to mid-May, oocytes of females collected from the two rivers were in the ripe stage. These results suggest that rainbow smelt inhabiting Funka Bay spawn from late April to mid-May in the rivers flowing into the western coast of the bay. Visual observations of adults in the rivers and the developmental process of oocytes indicate that rainbow smelt return to the sea after spawning.
Publisher ja 日本水産学会 en The Japanese Society of Scientific Fisheries
Date
    Issued1997
Language
  • jpn
Resource Type journal article
Version Type VoR
Identifier HDL http://hdl.handle.net/2115/38818
Relation
  • isIdenticalTo DOI https://doi.org/10.2331/suisan.63.50
Journal
    • PISSN 0021-5392
    • EISSN 1349-998X
    • NCID AN00193422
      • ja 日本水産学会誌 en Bulletin of the Japanese Society of Scientific Fisheries
      • Volume Number63 Issue Number1 Page Start50 Page End55
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Oaidate 2023-07-26