文章摘要
施兆鸿.舟山渔场银鲳和灰鲳繁殖特性的比较[J].水产学报,2006,30(5):647~653
舟山渔场银鲳和灰鲳繁殖特性的比较
Comparison of reproductive characteristics between Pampus argenteus and Pampus cinereuc in Zhoushan fishing ground
投稿时间:2008-05-12  修订日期:2008-05-12
DOI:10.3724/SP.J.00001
中文关键词: 银鲳  灰鲳  繁殖特性
英文关键词: Pampus argenteus  Pampus cinereu  reproductive characteristics
基金项目:上海市科技兴农攻关项目[沪农科攻字(2004)第8-3号]
作者单位E-mail
施兆鸿 中国水产科学研究院东海水产研究所 shizhh@sh163.net 
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中文摘要:
      用常规的生物学调查方法对舟山渔场银鲳和灰鲳进行了周年的取样调查分析,并对其性腺做石蜡切片,观察性腺发育情况,对银鲳和灰鲳的繁殖特性进行比较研究。结果表明:银鲳和灰鲳在繁殖季节性比为1∶1;两者的性腺发育和卵母细胞发育没有显著差异(P>0.05),Ⅴ时相的卵母细胞卵径都为700~870 μm,油球1个,油球径260~400 μm,初级卵膜厚度12~19 μm;都为一个繁殖期内多次产卵类型的鱼类;繁殖期内银鲳、灰鲳雌性生殖群体的平均叉长分别为22.5 cm、29.0 cm,银鲳雄性生殖群体叉长主要集中在14.0~17.0 cm,灰鲳雄性生殖群体叉长为23.0~25.5 cm;银鲳的繁殖季节在每年的4月初至6月初,繁殖高峰在4月中旬到5月中旬,银鲳卵巢成熟系数最高可达25%;而灰鲳的繁殖期在每年的6月初至8月中旬,繁殖高峰在6月下旬到7月下旬,灰鲳的卵巢成熟系数最高只有12.6%。银鲳繁殖期的水温为18~24 ℃,灰鲳为24~28 ℃;其他环境条件差异不大。另外还对银鲳和灰鲳卵母细胞发育的特征、繁殖期内卵巢成熟系数的变动以及繁殖期内环境因子的变动对产卵群体的数量影响进行了讨论。
英文摘要:
      Pampus argenteus and Pampus cinereu are two of the most important commercial species of inshore waters in China. The reproductive characteristics of the two species were discussed by means of biological investigation and histological slides analysis with optic microscope. The samples of these two species had been collected continually all year by fishing vessels at sea. The results indicated that the two species had same sex ratio(1∶1) during the spawning season. There was little variation in their gonad and oocyte development. The egg diameter of oocyte at the 5 phase was 700-870 μm with one oil globule at 260-400 μm diameter, and the thickness of primary egg membrane was 12-19 μm. They spawn several batchs during one reproductive season. Average fork lengths of female Pampusargenteus and P. cinereu in their reproductive season were 22.5 cm and 29.0 cm, respectively, and the fork length of male Pampus argenteus and P. cinereu in their dominant population was 14.0-17.0 cm and 23.0-25.5 cm, respectively. The reproductive season of Pampus argenteus was from early April to early June and the ovary gonadosomatic index (GSI) went up to its peak from middle of April to middle of May with the maximum 25%. However the reproductive season of P. cinereu was from early June to middle of August and its maximal ovary maximal GSI was 12.6% from late June to late July. In addition, the water temperature in reproductive period for Pampus argenteus and P. cinereu was 18-24℃ and 24-28℃, respectively. The effect of environmental factors on amount of spawning population was also discussed in this paper.
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