| 引用本文: | 金刚,李钟杰.一秋龄性成熟中华绒螫蟹的生物学──1.外部形态特征及性腺变化.湖泊科学,1999,11(1):52-56. DOI:10.18307/1999.0108 |
| JIN Gang,LI Zhong-jie.Biology of Mature 0+ Crabs, Eriocheir sinensis(I):Body Characteristics and Changes of Sexual Gland. J. Lake Sci.1999,11(1):52-56. DOI:10.18307/1999.0108 |
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| 摘要: |
| 本文描述了一秋龄性腺成熟中华绒螯蟹(简称河蟹)的外部特征并与一秋龄未成熟及二秋龄成熟河蟹进行比较, 同时给出了体重与壳宽的回归方程.保安湖的研究结果表明, 对于一秋龄雌蟹, 体重大于29.8g(壳宽为4.03cm)全部成熟, 而体重小于13.1g(壳宽为3.00cm)均不成熟, 体重在13、1-29.8g之间, 既有成熟又有未成熟.对于一秋龄雄蟹, 体重大于26.0g(壳宽3.91cm), 全部成熟, 而于12.0g壳宽2.66cm)均未成熟, 体重在12.0-26.0g之间, 既有成熟者又有未成熟个体.对一秋龄成熟河蟹成熟系数逐月变化的观察表明, 在翌年3月份达到峰值, 雌蟹为12.32± 1.75%, 雄蟹为 4.24± 0.06%;此后, 性腺迅速退化, 至翌年七月上旬, 卵巢退变成细索状结构.己无完整的卵粒. |
| 关键词: 中华绒螯蟹 一秋龄 外部特征 体重壳宽关系 成熟系数 |
| DOI：10.18307/1999.0108 |
| 分类号: |
| 基金项目:中国科学院水生生物研究所所长择优基金, 950402;农业部“八五”攻关课题, 85－14－01－01 |
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| Biology of Mature 0+ Crabs, Eriocheir sinensis(I):Body Characteristics and Changes of Sexual Gland |
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JIN Gang, LI Zhong-jie
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Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072
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| Abstract: |
| This paper describes the characteristics of mature 0+ crabs, Eriocheir sinensis, and its regression relationship between body weight (BW) and carapace width (CW).For the 0+ female crabs, when BW>29.8g(CW>4.03cm), the sexual gland is mature;when BW< 13.lg (CW <3.00cm), the sexual gland is immature.When BW ranges 13.1 -29.8g, some crabss are ma-true, some crab are immature.For the 0+ male crabs, when BW >26.Og (CW >3.91cm), all the crabs are mature;when BW< 12.0g (CW<2.66cm), immature.The sexual gland degrades from then on.In the first ten-day period of next July, the ovary looks like the slender thread and there is no complete ovum. |
| Key words: Eriocheir sinensis matrue 0+ crabs gonosomatic index body chacrateristics |
