文章摘要
姜志强.达里湖鲫的年龄和生长[J].水产学报,1996,20(3):
达里湖鲫的年龄和生长
AGE AND GROWTH OF CRUCIAN CARP IN DALI LAKE Jiang Z hiqiang and Qin Kejing
投稿时间:2014-05-11  修订日期:2014-05-11
DOI:
中文关键词: 达里湖    年龄  生长
英文关键词: Dali Lake, Crucian carp , Age, Growth
基金项目:
作者单位地址
姜志强 大连水产学院 大连水产学院
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中文摘要:
      根据478尾标本研究了生活在盐碱性达里湖中鲫的年龄和生长,并提出资源合理利用意见。采用臀鳍第三枚鳍条与鳞片相结合鉴定年龄,高龄个体以鳍条为主。生长模式可用VonBertalanffy生长方程来描述,渐近体长L∞=30.1cm,渐近体重W∞=832.3g、体重生长拐点tr=5.6龄。与70年代比较,目前湖中鲫的生长速度加快、产量下降,资源呈衰退状况。改善产卵条件,控制捕捞规格是恢复资源的重要措施。
英文摘要:
      Age a nd growth o f crucian car p ( Car assius aur atus) in Dali Lake, a sa linealkaline la ke situated in the Inter-Mongo lia platea u were studied. Bo th the third ray o f anal f in ( Spino us so f t ra y) and scale we re used as the materia l fo r a ge determinat io n. The result show ed that the scale w as a better mater ial fo r age determina tio n at the age below 5, whi le the third ray o f anal f in w as a superior o ne at the age 5 and abo ve. The V on Be rta lanf fy grow th equat ions as fo llow s: Lt= 30. 1[ 1- e- 0. 179 7( t + 0. 558 9) ] ; .. Wt= 832. 3[ 1- e- 0. 179 7( t 0. 558 9) ] 3 which wer e established based o n the age, length at age and w eight a t age, which indica ted a higher growth speed than that in 1970 ' s. Considering the decl ining o f the yields in r ecent years, w e suggest her e tw o management measures o f impr oving spaw ning co ndit io n and co ntr ol the capture size f or the conserv atio n o f resour ce.
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