Proposed power transmission lines in Cambodia constitute a significant new threat to the largest population of the Critically Endangered Bengal florican Houbaropsis bengalensis

Simon P. Mahood, João P. Silva, Paul M. Dolman, Robert J. Burnside

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    The remaining Indochina population of the Critically Endangered Bengal florican Houbaropsis bengalensis breeds in the floodplain of Cambodia's Tonle Sap Lake. The population has declined substantially but survival rates have not been published previously. Survival could potentially be reduced by the planned construction of high-tension power transmission lines that may begin in 2016. Using data from 17 individuals monitored by satellite transmitters over 4 years we estimated the annual adult survival rate to be 89.9% (95% CI 82.2-97.6%), which is comparable to that of other bustards. Interrogation of movement paths revealed that for the 13 individuals for which we had sufficient data for non-breeding seasons, all annual migration routes between breeding and non-breeding areas crossed the proposed route of the transmission line. The route also impinged on the margins of one important and one minor breeding concentration. A review of bustard collision rates confirmed the vulnerability of bustards to power lines, and the proposed development therefore presents an additional threat to the future of this species in Indochina.

    Original languageEnglish
    Pages (from-to)147-155
    Number of pages9
    JournalOryx
    Volume52
    Issue number1
    DOIs
    Publication statusPublished - Jan 2018

    Fingerprint

    Otididae
    Cambodia
    Indochina
    survival rate
    breeding
    power line
    migration route
    migratory behavior
    sap
    floodplains
    floodplain
    vulnerability
    collision
    breeds
    lakes
    lake
    Houbaropsis bengalensis
    rate

    Cite this

    Mahood, Simon P. ; Silva, João P. ; Dolman, Paul M. ; Burnside, Robert J. / Proposed power transmission lines in Cambodia constitute a significant new threat to the largest population of the Critically Endangered Bengal florican Houbaropsis bengalensis. In: Oryx. 2018 ; Vol. 52, No. 1. pp. 147-155.
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    abstract = "The remaining Indochina population of the Critically Endangered Bengal florican Houbaropsis bengalensis breeds in the floodplain of Cambodia's Tonle Sap Lake. The population has declined substantially but survival rates have not been published previously. Survival could potentially be reduced by the planned construction of high-tension power transmission lines that may begin in 2016. Using data from 17 individuals monitored by satellite transmitters over 4 years we estimated the annual adult survival rate to be 89.9{\%} (95{\%} CI 82.2-97.6{\%}), which is comparable to that of other bustards. Interrogation of movement paths revealed that for the 13 individuals for which we had sufficient data for non-breeding seasons, all annual migration routes between breeding and non-breeding areas crossed the proposed route of the transmission line. The route also impinged on the margins of one important and one minor breeding concentration. A review of bustard collision rates confirmed the vulnerability of bustards to power lines, and the proposed development therefore presents an additional threat to the future of this species in Indochina.",
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    Proposed power transmission lines in Cambodia constitute a significant new threat to the largest population of the Critically Endangered Bengal florican Houbaropsis bengalensis. / Mahood, Simon P.; Silva, João P.; Dolman, Paul M.; Burnside, Robert J.

    In: Oryx, Vol. 52, No. 1, 01.2018, p. 147-155.

    Research output: Contribution to journalArticleResearchpeer-review

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