Reproductive tactics and fertilization success of mature male Miyabe charr, Salvelinus malma miyabei

DOI PDF Web Site Web Site 被引用文献7件

書誌事項

公開日
1986-02
権利情報
  • http://www.springer.com/tdm
DOI
  • 10.1007/bf00005427
公開者
Springer Science and Business Media LLC

この論文をさがす

説明

Spawning behaviour, fertilization success and reproductive ecology of stream-resident and lake-run male Miyabe charr, Salvelinus malma miyabei, were studied under natural and artificial conditions. In Shikaribetsu Lake, Japan, the ratio of the two types of males is approximately 1:1, estimated by weir data. The majority of stream-resident males mature sexually at 2+ years of age, while the lake-run males begin to mature at 4+. In contrast to the large-bodied lake-run males, which paired with females, the smaller stream-resident males attempted to fertilize eggs by ‘streaking’ into the nest. We demonstrated through electrophoretic techniques that stream-resident males were able to fertilize eggs by streaking. Under artificial conditions, the estimated maximum proportion of eggs fertilized by a single stream-resident male was about 16.8. The evolutionary stability of the charr's dual mating system may be explained by Gross's theory for alternative life-history evolution, although further testing is necessary.

収録刊行物

被引用文献 (7)*注記

もっと見る

詳細情報 詳細情報について

問題の指摘

ページトップへ