Palaemonetes kadiakensis (Crustacae: Decapoda) in Oklahoma, 1982 and 1987
Palaemonetes kadiakensis (Crustacae: Decapoda) in Oklahoma, 1982 and 1987
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俄克拉荷马州的 Palaemonetes kadiakensis（甲壳科：十足目），1982 年和 1987 年
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
N. J. Cheper
中科院分区：
文献类型：
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作者：
N. J. Cheper
淡水虾在俄克拉荷马州受到有限的关注（1）。本文比较了1982年和1987年采集的帕德芒卡迪亚克松样品的丰度和分布。已描述了个体的收集方法和列表（1）。表1显示了1987年所有采集点（n = 19）标本的大小范围、性别比例和平均大小，以及1982年的相应数据。对比这两年的数据，有三个方面的差异很明显。首先，最近的平均大小更大;第二，有更少的青少年和怀孕的女性;第三，有更多的女性比男性。在路易斯安那州（2）、密苏里州（3）、俄亥俄州（4）和威斯康星州（5）进行的研究中描述了Palaemonetes kadiakensis的生活史。这些调查表明，虾的繁殖发生在5月至8月，6月中旬达到高峰。繁殖后的个体死亡，后代迅速生长，在生命的前三个月获得其最终长度的50%（3）。虾在冬季活跃，在春季成熟，然后死亡。在这项研究中收集的P. kadiakensis似乎也有一年的生命周期。1982年采集的标本主要集中在7月，种群由新生儿和部分生殖成虫组成。1987年收集的虾的取样日期从7月到10月不等;新生虾的年龄大了几个月，因此更大;产卵的雌性和成熟的雄性大多不存在。因此，本研究中的P. kadiakensis种群由夏季出现，秋季生长，冬季生存，春季后期繁殖和死亡的个体组成（一年的生命周期）。虽然这项研究的结果与其他调查的数据一致，但需要对该物种的生活史进行进一步研究，包括在冬季和春季进行采样。
Freshwater shrimp have received limited attention in Oklahoma (1). This paper compares the abundance and distribution of Paldemonetes kadiakensis samples collected in 1987 to those collected in 1982. Collection methods and tabulation of individuals has been described (1). Table 1 shows size range, sex ratio, and mean size for specimens at all collection sites (n = 19) in 1987, with the corresponding data for 1982. When the data for these two years are compared, three differences are obvious. First, the recent mean size is larger; second, there are fewer juveniles and gravid females; and third, there are more females per male. The life history of Palaemonetes kadiakensis has been described in studies conducted in Louisiana (2), Missouri (3), Ohio (4), and Wisconsin (5). These surveys indicate that shrimp reproduction occurs from May through August with a peak in mid June. The post-reproductive individuals die, and the offspring grow rapidly, obtaining 50% of their ultimate length in the first three months of life (3). Shrimp are active during the winter, mature in the spring, and then die. The P. kadiakensis collected in this study also appear to have a one-year life cycle. The sampling dates for the specimens collected in 1982 were mainly in July; the population consisted of newborn and some reproductive adults. The sampling dates for shrimp collected in 1987 ranged from July through October; the newborn shrimp were a few months older and therefore larger; egg-bearing females and mature males were mostly absent. Thus, P. kadiakensis populations in this study consists of individuals that appear in the summer, grow during the autumn, survive over winter, and reproduce and die in the late spring (a one-year life cycle). Although results of this study are in agreement with data from other investigations, further research is needed on the life history of this species, including sampling during the winter and spring seasons.