強制運動に対する三倍体ニジマスの生理学的反応

DOI 日本農学文献記事索引 Web Site 参考文献35件
  • Kobayashi Toru
    Shiga Prefectural Samegai Trout Farm Department of Fisheries, Faculty of Agriculture, Kinki University
  • Fushiki the late Shozo
    Shiga Prefectural Samegai Trout Farm Fisheries Laboratory of Kinki University
  • Ueno Koichi
    Department of Fisheries, Faculty of Agriculture, Kinki University

書誌事項

タイトル別名
  • Physiological Response of Triploid Rainbow Trout to Exhaustive Exercise

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抄録

Physiological changes during exhaustive exercise for 0-15 min and during the recovery process from 6 min exhaustive exercise were compared between triploids and diploids of all female rainbow trout progeny. Before the exhaustive exercise, the hemoglobin content in the spleen of triploid fish was significantly higher than that of diploids. Once the triploid fish was forced to perform exhaustive exercise, the relatively large triploid spleen was reduced to the same size as the diploid spleen until 1 min after the start of exercise. Thus the reduction in ratio of the weight of the triploid spleen with respect to the body weight with exercise was higher than that of the diploid spleen. The red blood corpuscle number significantly increased following the exhaustive exercise in both ploidies, but the ratio of increase was markedly higher in the triploid fish. The physiological recovery of triploid measured in terms of blood components following the exhaustive exercise was delayed by about 30 min compared with the diploid. The triploid fish required a longer time to recover than the diploid. Both the diploid and triploid fish recovered to their normal state 24 hours after the 6-min exhaustive exercise. Thus, it is presumed that triploids require a larger supply of red blood corpuscles to the blood during the exhaustive exercise than diploids, and the ability to supply red blood corpuscles is higher in triploids due to enlargement of the spleen.

収録刊行物

  • 水産増殖

    水産増殖 57 (3), 361-370, 2009

    日本水産増殖学会

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