Reproductive cycle of the protandric shrimp <italic>Pandalus latirostris</italic> in Saroma lagoon

DOI Web Site 被引用文献5件 参考文献32件
  • Onishi Yuta
    Department of Marine Biological Science, Faculty of Fisheries, Hokkaido University
  • Chiba Susumu
    Department of Marine Biological Science, Faculty of Fisheries, Hokkaido University
  • Goshima Seiji
    Department of Marine Biological Science, Faculty of Fisheries, Hokkaido University

書誌事項

タイトル別名
  • Reproductive Cycle of the Protandric Shrimp Pandalus latirostris in Saroma Lagoon

この論文をさがす

抄録

Abstract: The reproductive cycle of the protandric shrimp Pandalus latirostris in Saroma Lagoon, Hokkaido, was examined morphologically and histologically. The pleopod morphotypes showed that this population comprised five groups that were in different sexual development stages during the study period. The sexual groups were related with body size and roughly represented year classes. Gonadal development was divided into 11 stages by observing germ cell development. Seasonal changes of gonadal development were examined for the three dominant sexual groups. In Saroma Lagoon, males generally matured at Age-1 and mated as female at≥ Age-2. Some males thought to be Age-0matured as males once again or changed sex at Age-1. Individuals that matured as males in two consecutive years were also observed in gonadal development of normal males and reached sizes of typical females, probably at Age-2. Values of both gonadsomatic and vas deferens-somatic indexes rapidly increased from July and showed their lowest values in September. Male and female mature germ cells were observed from late August to late September, suggesting that the breeding season occurs in autumn and lasts one month.

収録刊行物

被引用文献 (5)*注記

もっと見る

参考文献 (32)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ