首页> 外文期刊>Bulletin de la Societe Zoologique de France >DYNAMIQUE ET CROISSANCE DE L'ECREVISSE A PATTES ROUGES ASTACUS ASTACUS (LINNAEUS, 1758) DANS LE PLAN D'EAU DE ZEROUKA 2 (MOYEN ATLAS, MAROC)
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DYNAMIQUE ET CROISSANCE DE L'ECREVISSE A PATTES ROUGES ASTACUS ASTACUS (LINNAEUS, 1758) DANS LE PLAN D'EAU DE ZEROUKA 2 (MOYEN ATLAS, MAROC)

机译:红足小龙虾ASTACUS(LINNAEUS,1758)在ZEROUKA 2水体中的动力学和生长(摩洛哥中阿特拉斯)

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摘要

The noble crayfish Astacus astacus was introduced into Morocco between 1930 and 1992, but its acclimatization was only successful in Ifrane province. In Zerouka 2 reservoir, situated in Ifrane province, the water contains 70 mg per liter of calcium ions and its dissolved oxygen level is favorable for the development of this species. The density average of the population, estimated by Petersen's method, is 25 individual per m~2. The crayfish population in Zerouka 2 reservoir comprises three groups: juveniles, male adult and female adult. The juvenile population sample contained 480 immature individuals. Two age groups 0~+ and I~+ represent the juveniles. Their respective lengths are 27.03 and 54.18 mm. The age groups 0~+ confirm the continual recruitment of this population. The male adult population is represented by 576 individuals. The structure of this population shows 7 age groups (Ⅱ~+, Ⅲ~+, Ⅳ~+, Ⅴ~+, Ⅵ~+, Ⅶ~+ and Ⅷ~+). Their lengths increase from 77.71 to 146.30 mm. The female adult population, composed of 528 individual, contains 6 age groups (Ⅱ~+, Ⅲ~+, Ⅳ~+, Ⅴ~+, Ⅵ~+ and Ⅶ~+). Their lengths vary from 82.79 to 131.01 mm.
机译:贵族小龙虾Astacus astacus在1930年至1992年之间被引入摩洛哥,但仅在伊夫兰省成功地进行了驯化。在Ifrane省的Zerouka 2水库中,水中每升钙离子含量为70 mg,其溶解氧含量有利于该物种的发育。通过彼得森方法估算的人口密度平均值为每m〜2 25个人。 Zerouka 2水库的小龙虾种群包括三类:少年,成年雄性和雌成年。青少年人口样本包含480个未成熟个体。 0〜+和I〜+这两个年龄段代表青少年。它们各自的长度是27.03和54.18 mm。 0〜+岁年龄组确认了该人群的持续招募。男性成年人口有576人。该人群的结构显示了7个年龄组(Ⅱ〜+,Ⅲ〜+,Ⅳ〜+,Ⅴ〜+,Ⅵ〜+,Ⅶ〜+和Ⅷ〜+)。它们的长度从77.71毫米增加到146.30毫米。成年女性人口由528人组成,分为6个年龄段(Ⅱ〜+,Ⅲ〜+,Ⅳ〜+,Ⅴ〜+,Ⅵ〜+和)〜+)。它们的长度从82.79到131.01毫米不等。

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