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    Inter-aviary distance and visual access influence conservation breeding outcomes in a territorial, endangered bird

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    Issue Date
    2020
    Author
    Flanagan, Alison M.
    Rutz, Christian
    Farabaugh, Susan M.
    Greggor, Alison L.
    Masuda, Bryce M.
    Swaisgood, Ronald R.
    Subject
    CROWS
    HUSBANDRY
    WILDLIFE MANAGEMENT
    WILDLIFE CONSERVATION
    AVIARIES
    REPRODUCTION
    CARE OF EGGS
    HAWAIIAN ISLANDS
    EGGS
    FERTILIZATION
    ANIMAL WELFARE
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    Journal title
    Biological Conservation
    Volume
    242
    Begin page
    108429
    
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    DOI
    10.1016/j.biocon.2020.108429
    Alternative link
    http://www.sciencedirect.com/science/article/pii/S000632071931715X
    Abstract
    Species extinctions are becoming a global crisis, affecting biodiversity and ecosystem services, with island populations being particularly vulnerable. In response, conservation managers are increasingly turning to ex situ conservation breeding programs to establish assurance populations and provide a source for release and re-establishment of wild populations. The 'Alalā (Hawaiian crow, Corvus hawaiiensis) is a critically endangered and territorial island corvid that became extinct in the wild in 2002, following a severe and prolonged population decline during the late 20th century....
    Description
    The Hawaiian crow ('Alalā; Corvus hawaiiensis) is a critically endangered and territorial island corvid. Prior to its extinction in the wild in 2002, individuals of the species were brought into captivity to establish an assurance population – for conservation breeding. We evaluated how captive housing conditions impact 'Alalā reproduction using 19 years of conservation breeding program data. Reproduction was most strongly impacted by inter-aviary distance and whether breeding pairs had visual access to other adult conspecifics. Pairs in aviaries that were more spatially isolated and without visual access to adult conspecifics were more likely to produce fertile eggs than pairs housed in aviaries that were closer to others or those with visual access to other birds. Our results have vital implications relevant to the design of conservation breeding centers for endangered, territorial birds. Moreover, since suboptimal housing conditions can increase stress levels in captive birds, our findings are also relevant to improving animal welfare.
    URI
    http://hdl.handle.net/20.500.12634/216
    Type
    Article
    Rights
    © 2020 Elsevier Ltd. All rights reserved.
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.biocon.2020.108429
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