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Searching for factors to cause oogenesis without yolk as a reproductive strategy in Apogon lineatus

Research Project

Project/Area Number 25850137
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Aquatic bioproduction science
Research InstitutionKagoshima University

Principal Investigator

KUME Gen  鹿児島大学, 水産学部, 助教 (00554263)

Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords口内保育 / 卵生産 / 実効性比 / テンジクダイ
Outline of Final Research Achievements

Aggregation and behavioral patterns were examined for wild population of Apogon lineatus in Omura Bay, Nagasaki Prefecture, for two consecutive spawning seasons. Individuals were occurred solitarily on the sandy-muddy bottoms during the nighttime. Sexual differences in behavioral patterns were observed. The increase in mortality rates of males following mouthbrooding care was suspected to be one of the major factors to cause reversed operational sex ratio. For a total of seven apogonid species, ovaries were investigated histologically. The oogenesis pattern similar to A. lineatus (approximately 20% of each brood is constituted by eggs without yolk, which were hydrated without the vitellogenesis phase and eventually ovulated with other normal eggs as a single egg mass.) was not observed, suggesting that it is not prevailing in apogonids.

Report

(3 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • Research Products

    (2 results)

All 2014

All Presentation (2 results)

  • [Presentation] Ecological studies on the cardinal fish Apogon lineatus in the temperate coastal regions of Japan2014

    • Author(s)
      Gen Kume
    • Organizer
      Asian Fish Biodiversity Conference 2014
    • Place of Presentation
      マレーシア
    • Related Report
      2013 Research-status Report
  • [Presentation] Oogenesis without Vitellogenesis by Apogon lineatus Females: A Reproductive Strategy?2014

    • Author(s)
      Gen Kume
    • Organizer
      2014 Joint Meeting of Ichthyologists and Herpetologists
    • Place of Presentation
      アメリカ合衆国
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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