Movements and habitat choice of resident and translocated adult female Grass Snakes (Natrix natrix) during the egg-laying period

IF 1.1 4区 生物学 Q3 ZOOLOGY Herpetological Journal Pub Date : 2019-10-01 DOI:10.33256/29.4.245251
J. Elmberg
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Abstract

We used externally applied transmitters to study movements of female grass snakes (Natrix natrix) during the egg-laying period in a near-urban landscape in Sweden. Half of the studied snakes were residents while the other half were translocated individuals with no previous experience of the area. As predicted, resident females moved more goal-oriented and shorter distances than did translocated individuals. Habitat use did not differ between resident and translocated snakes; they were typically found in bushes, reeds, and tall vegetation. Habitat preference (use in relation to availability) showed that bushy habitats, tall grassy vegetation and reedbeds were over-used in proportion to availability, whereas forest and open grass lawns were used less than expected based on availability. Our study highlights the importance of preserving and restoring linear habitat components providing shelter and connectivity in conservation of grass snakes. We suggest that externally applied transmitters are a better option than surgically implanted ones in movement studies of grass snakes, and that translocation as a conservation method for snakes has drawbacks.
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成年和迁居雌性草蛇产卵期的活动和栖息地选择
我们使用外部应用的发射器研究了雌性草蛇(Natrix Natrix)在瑞典近城市景观中产卵期间的运动。被研究的蛇中有一半是居民,而另一半是以前没有该地区经验的迁移个体。正如预测的那样,居住的雌性比迁移的个体移动更多的目标导向和更短的距离。居住蛇和迁移蛇的栖息地使用没有差异;它们通常在灌木丛、芦苇和高大的植被中发现。栖息地偏好(与可用性相关的使用)表明,茂密的栖息地、高大的草地植被和芦苇床的使用与可用性成比例,而森林和开阔草地的使用低于基于可用性的预期。我们的研究强调了保护和恢复线性栖息地组成部分的重要性,这些组成部分为草蛇的保护提供了庇护所和连通性。我们认为,在草蛇的运动研究中,外部应用的发射器比手术植入的发射器更好,而移位作为一种保护蛇的方法也有缺点。
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来源期刊
Herpetological Journal
Herpetological Journal 生物-动物学
CiteScore
2.40
自引率
10.00%
发文量
25
审稿时长
>12 weeks
期刊介绍: The Herpetological Journal is the Society''s prestigious quarterly scientific journal.
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