Out in the Cold: Trophic Resource Use by the Common Frog (Rana temporaria) Populations Inhabiting Extreme Habitats

IF 0.9 4区生物学 Q4 ECOLOGY

Annales Zoologici Fennici Pub Date : 2018-11-01 DOI:10.5735/086.055.0608

D. Cogǎlniceanu, R. Dorel, R. Plăiaşu, M. Palmer

引用次数: 2

Abstract

We studied trophic resource use and availability in three populations of the common frog (Rana temporaria): one from the subarctic (Kilpisjärvi, Finland), and two (alpine and low-altitude valley populations) from the Retezat Mountains (Southern Carpathians, Romania). We used stomach flushing to sample consumed prey, and estimated prey availability using pitfall traps and netting. In addition, we analyzed the geographical pattern of feeding based on published records covering the entire range of the species. Feeding intensity varied, both spatially and according to frog size. Adults consumed prey of higher richness and more prey items than juveniles. There was latitudinal variation in prey consumption, with populations from extreme habitats (alpine and arctic) having the highest prey richness. This high feeding plasticity partly explains why Rana temporaria is widespread and reaches high altitudes and latitudes in Europe.

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在寒冷中:居住在极端栖息地的普通蛙(临时蛙)种群对营养资源的利用

我们研究了三个普通蛙(Rana temporaria)种群的营养资源利用和有效性:一个来自亚北极(Kilpisjärvi，芬兰)，两个来自Retezat山脉(罗马尼亚南喀尔巴阡山脉)(高山和低海拔山谷种群)。我们使用胃冲洗法对消耗的猎物进行取样，并使用陷阱和网估计猎物的可用性。此外，我们还基于覆盖整个物种范围的已发表记录分析了取食的地理格局。摄食强度在空间和大小上都存在差异。成鱼比幼鱼消耗的猎物丰富度更高，种类也更多。食用量存在纬度差异，极端生境(高山和北极)的种群食用量最高。这种高度的取食可塑性在一定程度上解释了为什么天竺葵在欧洲的高海拔和高纬度地区分布广泛。

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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来源期刊

Annales Zoologici Fennici 生物-动物学

CiteScore

2.40

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： Annales Zoologici Fennici publishes mainly original research reports, but also in-depth reviews and commentaries on all aspects of animal ecology and evolution, and fields related to them. Our aim is to promote papers which focus on the interactions among various components in the past and present environments by using integrative and cross-disciplinary approaches. This may be achieved by employing tools from different fields of research, such as (but not restricted to): ecology and paleoecology, molecular ecology and phylogeography, conservation biology, human-induced contemporary evolution and wildlife management, animal behaviour and interactions (including recognition systems and mechanisms), paleontology (except systematics and taxonomy) and evolution, bioenergetics.