アサリの性成熟における水温の影響

• 鳥羽 光晴

  千葉県栽培漁業センター

• 深山 義文

  千葉県東京湾栽培漁業センター

書誌事項

タイトル別名

• Influence of Temperature on the Sexual Maturation in Manila Clam, Ruditapes philippinarum.

抄録

Wild Manila clam, Ruditapes philippinarum collected from Tokyo Bay in four occasions, representing four different stages of gonadal maturation, were exposed to a series of constant water temperatures and abundant microalgal food in the laboratory. The histological development of the gonads and the changes in the condition factor (C.F.) of the clams were examined in relation to the initial gonadal state and rearing temperature.<BR>The clams with gonads in undifferentiated stage (collection in Nov. 1990), in early active stage (Mar. 1991), and in late active stage (Aug. 1991) showed gonadal development at temperatures between 10-27°C, while those in spawning or spent stages (Oct. 1991) showed gonadal degeneration. The rate of increase of gonadal index (y) was always directly related to temperature. It could be expressed as the function of water temperature (x), y=0.0037x-0.0168. The biological zero in gonadal development was estimated to be 4.5°C. From these results, the environmental temperature is probably not a limiting factor for the reproductive activity for R. philippinarum, and the gonadal developmet occurrs between the temperature of 10-27°C regardless of the initial gonadal condition except immediately after spawning. The wild R. philippinarum is considered to be more strongly influenced by food availability than by water temperature (min. 8°C, max. 27°C) .

収録刊行物

• 水産増殖

  水産増殖 43 (3), 305-314, 1995

  日本水産増殖学会

キーワード

• Manila clams
• Gonadal development
• Temperature
• Food

詳細情報

• CRID: 1390282679693501952
• NII論文ID: 10004769591
• NII書誌ID: AN00124667
• DOI: 10.11233/aquaculturesci1953.43.305
• ISSN: 21850194
• ISSN: 03714217
• Web Site: https://agriknowledge.affrc.go.jp/RN/2030570946
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • CiNii Articles
  • Crossref
• 抄録ライセンスフラグ: 使用不可