Knowing the way home: strong philopatry of a highly mobile insect species, Brenthis ino

Knowing the way home: strong philopatry of a highly mobile insect species, Brenthis ino
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知道回家的路:高度流动的昆虫物种布伦西斯·伊诺(Brenthis ino)的强大亲缘关系

DOI:
10.1007/s10841-013-9601-9
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发表时间:
2013
影响因子:
1.9
通讯作者:
Schmitt
Schmitt
中科院分区:
农林科学2区
文献类型:
--
作者:
Schmitt

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流动性是至关重要的可行的集合种群的维护,但定量数据,以评估风险,由于个人流动性不足的重点昆虫物种大多缺乏。我们选择了butterflyBrenthis ino,一个物种通常局限于潮湿的休耕草原在中欧,并进行了标记-释放-再捕获研究,在3.2公顷的研究区域,一个大的和一个小补丁的合适的栖息地从2010年6月22日至7月23日。每次捕获蝴蝶的位置都用GPS测量并传输到GIS中。总的来说,我们在1,545次捕获事件中标记了984个个体,估计累积种群规模为2,400个个体。成年雄性的最初增长速度比雌性快得多,类似于其他蝴蝶的雄性先熟期人口增长。两性的迁移距离通常不超过80 m,约40%的个体使用不到2%的适宜栖息地。所有转移到另一个小块的个体后来都回到了他们原来的小块,证实了B。我是个很有魅力的人。我们得出结论,低有效流动性在B。与仅仅观察野外飞行活动所得出的结果相比,厄尔尼诺现象产生的家域要小得多,而且当斑块密度因景观破碎化而下降时,长距离移动的低趋势会显着阻碍集合种群的维持。
Mobility is crucial for the maintenance of viable metapopulations, but quantitative data to evaluate risks due to insufficient individual mobility of focal insect species are mostly lacking. We selected the butterflyBrenthis ino, a species typically confined to wet fallow grasslands in Central Europe and performed a mark–release–recapture study in a 3.2 ha study area with one big and one small patch of suitable habitat from 22 June to 23 July 2010. The position of each butterfly capture was measured with a GPS and transferred into a GIS. In total, we marked 984 individuals in 1,545 capture events and estimated that the cumulative population size was 2,400 individuals. The initial increase of adult males proceeded much faster than for females, similar to the protandrous population build-up known from other butterflies. Moved distances for both sexes usually did not exceed 80 m, and about 40 % of all individuals used less than 2 % of the available suitable habitat. All individuals switching to the other patch returned later to their patch of origin, confirming thatB. inois highly philopatric. We conclude that low effective mobility inB. inoproduces much smaller home ranges than suggested by merely observing flight activities in the field, and that low tendencies towards long-distance movements significantly hamper the maintenance of metapopulations when patch density decreases due to landscape fragmentation.
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