北京大学学报（自然科学版）

日本七鳃鳗体态变型的观测研究

杨雨壮1,殷丽洁2,秦大公2,杨树勋1,潘文石2   

  1. 1延边自治州水产站，延吉，133001；2北京大学生命科学学院，北京，100871
  • 收稿日期:2001-12-12 出版日期:2002-11-20 发布日期:2002-11-20

Change of Posture Characteristics of Lamprey, Lampetra japonica (Marten)

YANG Yuzhuang1，YIN Lijie2，QIN Dagong2，YAN G Shuxun1，PAN Wenshi2   

  1. 1Fish Station, Yanbian Autonomous Region, Yanji, 133001; 2College of Life Sciences, Peking University, Beijing, 100871
  • Received:2001-12-12 Online:2002-11-20 Published:2002-11-20

PDF (翻译版)

摘要： 为进一步揭示日本七鳃鳗由以两背鳍相分离为特征的非产卵态体型变为产卵时(含产后)两背鳍相连接的产卵态体型这一体态变型现象，选取了27项体态特征可量性状，对从日本海回归 内河的日本七鳃鳗性成熟产卵群体不同时季3种类群共116尾(♀♀55，♂♂61)标本进行了系 统测量。对每一性状均用统计处理数据按类群分雌雄进行了统计学差异显著性检验对比，从而揭示出了日本七鳃鳗溯入内河时至翌春产卵前特别是产卵活动体态变型时躯体各部位具体 的变化情形。

关键词: 日本七鳃鳗, 两背鳍, 可量性状, t检验, 体态变型

Abstract: According to observations during the fertilization period,the posture structure of the Lampetra japonica (Marten) changes; the normally separate dorsal fins join so that they are adjacent. Systematic measurement of 116 Lampetra japonica (55 females, 61 males) have done. When the Lampertra japonicareturn to their spawning area up the river from the Sea of Japan in three different groups during different seasons, 27 different measurements were conducted on each fish. Each spawning group brought into comparison from t-test analyses and dissected Lampetra japonica on site in order to observe their posture structure. From the time the Lampetra japonica enter the freshwater river until spring of the following year when the eggs are released, especially during the fertilization period, various aspects of their body structure undergo change.

Key words: Lampetra japonica(Marten), double dorsal fins, measurements, t-test, change of posture

中图分类号: 

版权所有 © 《北京大学学报（自然科学版）》编辑部
技术支持：北京玛格泰克科技发展有限公司