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首页> 外文期刊>Canadian Journal of Zoology >Life history of tundra-dwelling wolf spiders (Araneae: Lycosidae) from the Yukon Territory, Canada
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Life history of tundra-dwelling wolf spiders (Araneae: Lycosidae) from the Yukon Territory, Canada

机译:来自加拿大育空地区的冻原狼蛛(Araneae:Lycosidae)的生活史

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摘要

We studied populations of three tundra-dwelling wolf spider (Lycosidae) species to determine reproductive trait relationships and developmental timing in the Arctic. We collected 451 Pardosa lapponica (Thorell, 1872), 176 Pardosa sodalis Holm, 1970, and 117 Pardosa moesta Banks, 1892 during summer 2008. We used log-likelihood ratio tests and multiple linear regressions to determine the best predictors of fecundity and relative reproductive effort. Female body size best explained the variation in fecundity and body condition was the best predictor for relative reproductive effort. We tested for a trade-off between the allocation of resources to individual eggs and the number of eggs produced (fecundity) within each species using linear regression. There was variation in detectable egg size and number trade-offs among sites and these may be related to local variation in resource allocation linked to density-related biotic or abiotic factors. These findings contribute to knowledge about the fitness of arctic wolf spiders in the region of study and are particularly relevant in light of the effects that climate changes are predicted to have on the arctic fauna.
机译:我们研究了三种居住在苔原上的狼蛛(Lycosidae)物种的种群,以确定北极的生殖性状关系和发育时间。在2008年夏季,我们收集了451个Papposa lapponica(Thorell,1872年),176个Pardosa sodalis Holm(1970年)和117个Pardosa moesta Banks(1892年)。我们使用对数似然比检验和多元线性回归来确定生育力和相对繁殖力的最佳预测指标努力。女性的体型最能说明生育力的变化,而身体状况是相对生殖力的最佳预测指标。我们使用线性回归测试了在单个鸡蛋的资源分配与每个物种内产卵数(生殖力)之间的权衡。站点之间可检测到的卵大小和数量折衷之间存在差异,这可能与与密度相关的生物或非生物因素有关的资源分配的局部差异有关。这些发现有助于了解北极狼蛛在该研究区域的适应性,并且鉴于气候变化对北极动物的影响,这些发现特别相关。

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