Using videotaping to validate the use of spraints as an index of Eurasian otter (Lutra lutra) activity

Amichai Guter, Amit Dolev, David Saltz, Noga Kronfeld-Schor

    Research output: Contribution to journalArticlepeer-review

    23 Scopus citations

    Abstract

    Eurasian Otter (Lutra lutra) surveys are commonly based on spraints (otter faeces) as an index of use intensity, habitat preference, and to a certain degree, population density. We were interested to know: (1) Does the number of fresh spraints correlate to the number of visits? (2) Can spraints be indicative of activity levels? (3) Is the absence of fresh spraints indicative of no visits? We used videotaping that provided a true picture of otter nocturnal activity at marking sites and compared our findings with the number of fresh spraints the following morning. This enabled us to correlate the number of spraints with the number of otter visits during the night and assess the validity of spraints as an activity index. We carried out a total of 59 videotaping nights and counted spraints in 29 sprainting sites between September 2002 and March 2004. We found a positive correlation between the proportion of nights a latrine was visited and the proportion of nights fresh spraints were deposited. The number of fresh spraints/night/site was positively correlated with the number of otter visits/night/site. Latrines visited on more nights had a higher number of fresh spraints per night visited. However, in about half the nights where no spraints were found, visits were recorded. Spraints are generally a good indicator of use intensity of a specific latrine and consequently a possible indicator of activity level and habitat preference. Understanding what determines scent-marking behaviour and its relationship to actual activity and presence can improve our ability to assess otter populations and design management protocols.

    Original languageEnglish
    Pages (from-to)462-465
    Number of pages4
    JournalEcological Indicators
    Volume8
    Issue number5
    DOIs
    StatePublished - 1 Sep 2008

    Keywords

    • Activity measurements scent marking
    • Eurasian otter
    • Israel
    • Spraints
    • Validation
    • Videotaping

    ASJC Scopus subject areas

    • General Decision Sciences
    • Ecology, Evolution, Behavior and Systematics
    • Ecology

    Fingerprint

    Dive into the research topics of 'Using videotaping to validate the use of spraints as an index of Eurasian otter (Lutra lutra) activity'. Together they form a unique fingerprint.

    Cite this