How do seasonal changes in adult wolf defecation patterns affect scat detection probabilities?

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-12-20 DOI:10.25225/jvb.22043

F. Roda, Florian Poulard, Gaëtan Ayache, Nadine Nasi, Carole D'Antuoni, Roger Mathieu, G. Cheylan

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引用次数: 1

Abstract

Abstract. Wolves are currently recolonising their historic range in France. The collection of scats is a widely used a non-invasive survey method to monitor wolf population size. However, seasonal changes in wolf faecal deposition patterns might affect the results of surveys. We used a detection dog and camera trapping (CT) to compare wolf scat detectability during winter and the nursing season. We collected 113 scats deposited by adult wolves at 29 marking sites on forest roads in the Sainte-Baume Regional Park, Provence, France. After parturition, the mean number of adult wolf scats increased by 160% inside the nursing territory and decreased by 80% outside of it. Around the time the pups are born, changes in faecal deposition patterns of adults make it easier to find scats around the wolf den (87% probability per wolf marking site) and harder to find scats outside the nursing territory (11% probability). During winter, the chance to find scats is equal (38 to 40% probability per wolf marking site) inside vs. outside the nursing territory. The combined use of a detection dog and camera traps allowed us to gather data on wolf defecation patterns non-invasively. Detectability of adult wolf scats during the nursing season is highly variable compared to winter due to seasonal behavioural changes affecting scat location. We conclude that surveys to collect samples and estimate wolf population size should be conducted exclusively during winter to avoid sampling biases.

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成年狼排便模式的季节变化如何影响粪便检测概率？

摘要狼队目前正在法国重新殖民他们的历史范围。收集粪便是一种广泛使用的非侵入性调查方法，用于监测狼的种群规模。然而，狼粪便沉积模式的季节性变化可能会影响调查结果。我们使用探测犬和相机捕捉（CT）来比较冬季和哺乳季节狼粪便的可探测性。我们在法国普罗旺斯圣鲍梅地区公园森林道路上的29个标记点收集了113只成年狼的粪便。分娩后，成年狼排泄物的平均数量在护理区内增加了160%，在护理区外减少了80%。在幼崽出生前后，成年狼粪便沉积模式的变化使其更容易在狼窝周围发现排泄物（每个狼标记点的概率为87%），而在护理区以外更难找到排泄物（概率为11%）。在冬季，在护理区内外发现粪便的机会是相等的（每个狼标记点的概率为38%至40%）。探测犬和相机陷阱的结合使用使我们能够无创地收集狼排便模式的数据。与冬季相比，哺乳季节成年狼粪便的可检测性变化很大，因为季节性行为变化会影响粪便的位置。我们的结论是，收集样本和估计狼种群规模的调查应该只在冬季进行，以避免抽样偏差。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.