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首页> 外文期刊>Inland water biology >The State of Populations of Lernaea cyprinacea L. (Copepoda: Lernaeidae) and Crucian Carp Carassius carassius L. in Dlinnoye Lake
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The State of Populations of Lernaea cyprinacea L. (Copepoda: Lernaeidae) and Crucian Carp Carassius carassius L. in Dlinnoye Lake

机译：Dlinnoye湖中的Lernaea cyprinacea L.（Copepoda：Lernaeidae）和c鱼Carassius carassius L.的种群状况

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摘要

The state of populations of the crucian carp Carassius carassius L. and the copepod parasite Lernaea cyprinacea L. was studied after 10 years of a sharp decrease in their abundance. Only one generation of Lernaea cyprinacea species was recorded each year. The alteration of the parasite generation occurred in the second half of July. Changes in the age structure of the copepod population did not affect the distribution pattern of its abundance in the host population, but the values of the K exponent changed in accordance with alterations of the parasite generations. By 2007 the sex ratio in the population became equal, males and females differed in their lengths and weights, and three dimensional groups were found in the catches. It is thought that males and females of the crucian carp have different roles in the maintenance of the L. cyprinacea abundance. The dominating fish sizes and the level of the host infection by copepods remained the same as in 1997-2003.
机译：在10鱼的丰度急剧下降10年后，研究了cru鱼和car足寄生虫Lernaea cyprinacea L.的种群状况。每年仅记录到一世的Lernaea cyprinacea种。寄生虫的发生发生在七月下半月。 co足类种群年龄结构的变化并未影响其在寄主种群中的丰度分布模式，但K指数的值随寄生虫世代的变化而变化。到2007年，人口性别比变得相等，男性和女性的长度和体重有所不同，并且在渔获物中发现了3个维度组。据认为，carp鲤的雄性和雌性在维持塞浦路斯鲤科鱼的丰度中具有不同的作用。 co足类鱼类的主要鱼类规格和宿主感染水平与1997-2003年相同。

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