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首页> 外文期刊>Latin american journal of aquatic research >Biological parameters of the burrowing crayfish, Parastacus pugnax (Poeppig, 1835), in Tiuquilemu, Bío-Bío Region, Chile
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Biological parameters of the burrowing crayfish, Parastacus pugnax (Poeppig, 1835), in Tiuquilemu, Bío-Bío Region, Chile

机译：智利比奥比奥地区蒂奎勒木的穴居小龙虾的生物学参数（Poeppig，1835）

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In order to determine the biological parameters of the burrowing crayfish (Parastacus pugnax), we fenced in 900 m2 of a humid, low-lying sector in Tiuquilemu, Bío-Bío Region, Chile. Monthly samples were taken from August 2007 to August 2008, and 3,512 specimens were caught. Records were made of their carapace length (CL), total weight (TW), sex, and number of eggs (for females). The monthly size-structures showed few juveniles between 20 and 30 mm CL in nearly all months. P. pugnax was found to carry eggs from mid-spring through late autumn; size at first maturity for females was 38.1 mm CL; and fecundity varied between three and 45 eggs per female. In terms of the global sexual proportion, males were predominant in 11 of the 12 months, although the ratio was as expected (1:1). We estimated the parameters of the growth curve using modal progression analysis, obtaining CL∞, K, and t0 values of 55.3 mm, 0.23 mm year-1, and -0.58 years, respectively. The length-weight relationship was calculated separately for males and females, and no significant differences were found between sexes. The common parameters defining the potential function of a = 0.00052 and b = 2.98 (P
机译：为了确定穴居小龙虾（Parastacus pugnax）的生物学参数，我们在智利Bío-Bío地区Tiuquilemu 900平方米的潮湿低洼地带围栏。从2007年8月至2008年8月，每月取样一次，并捕获了3,512个样本。记录其甲壳长度（CL），总重量（TW），性别和卵数（雌性）。每月的大小结构显示几乎在所有月份中，CL在20到30毫米之间的少年都很少。人们发现，从春季中期到深秋，P。pugnax都会携带卵。雌性第一次成熟的大小为CL 38.1毫米;每只雌性的繁殖力在3至45个卵之间。就全球性别比例而言，在12个月中有11个月中男性占主导地位，尽管这一比例符合预期（1：1）。我们使用模态级数分析估算了增长曲线的参数，分别获得了55.3 mm，0.23 mm year-1和-0.58年的CL∞，K和t0值。男女的体长-体重关系是分别计算的，性别之间没有显着差异。定义a = 0.00052和b = 2.98（P的势函数的通用参数

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