Study of the Reproduction of Cambarellus montezumae (Saussure, 1857) Under Different Sex Relations

Li Mc, Hernandez-Moreno H, Carmona-Osalde C, Rodriguez-Serna M
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Abstract

The crayfish Cambarellus montezumae (Saussure, 1857), is one of the endemic freshwater decapod crustacean species with the largest area of distribution in Mexico (Villalobos, 1955). This species is registered in the closed basins of the Neovolcanic Axis from Puebla to Jalisco, that is, along the Lerma-Santiago-Chapala system. For the present study, crayfishes of the species Cambarellus montezumae were collected in the Xochimilco Canals. We distributed 120 mature females and 48 F1 males (reproductive form) in 9 plastic tubs of 0.54 × 0.34 × 0.14 m with individualized PVC shelters, constant aeration and a temperature of 18°C. Three handling densities were tested: D1 ( 8 org/m2), D3 (16 org/m2), D6 (28 org/m2), which will represent 4, 12, 24, females/m2, and a sex ratio (Male : Female) of 1: 1, 1: 3 and 1: 6. It was appreciated that there was no fluctuation of temperature throughout the experiment. The statistical analysis in females did not indicate significant differences in the parameters of initial weight, final weight, final length. The differences were found in the parameters of weight gained in percentage, Specific Growth Rate, Food Conversion Rate, initial length, percentage of spawning and the number of eggs per female.
不同性别关系下蒙古Cambarellus montezumae (Saussure, 1857)繁殖的研究
小龙虾Cambarellus montezumae (Saussure, 1857)是墨西哥特有的淡水十足甲壳类物种之一,分布面积最大(Villalobos, 1955)。该物种分布在从普埃布拉到哈利斯科州的新火山轴的封闭盆地,即沿着莱马-圣地亚哥-查帕拉系统。本研究在霍奇米尔科运河中采集了小龙虾Cambarellus montezumae。我们将120只成熟雌性和48只雄性(繁殖型)分装在9个0.54 × 0.34 × 0.14 m的塑料桶中,每个塑料桶有单独的PVC遮蔽,恒定通风,温度为18°C。测试了三种处理密度:D1 (8 /m2), D3 (16 /m2), D6 (28 /m2),这将代表4,12,24,雌性/m2,以及1:1,1:3和1:6的性别比例(雄性:雌性)。值得注意的是,在整个实验过程中温度没有波动。统计分析表明,雌性的初始体重、最终体重、最终长度等参数均无显著差异。在增重率、特定生长率、食物转化率、初始体长、产卵率和每只雌鱼产卵数等参数上存在差异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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