• Login
    View Item 
    •   Research Bank Home
    • Unitec Institute of Technology
    • Study Areas
    • Natural Sciences
    • Natural Sciences Journal Articles
    • View Item
    •   Research Bank Home
    • Unitec Institute of Technology
    • Study Areas
    • Natural Sciences
    • Natural Sciences Journal Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Changes in the breeding status of the southern black-backed gull (Larus dominicanus) colonies on Rangitoto Island, Hauraki Gulf, New Zealand

    Galbraith, Mel; Krzyżosiak, Jacek; Aguilar, Glenn; Jones, Graham; Oliver, Rob

    Thumbnail
    Share
    View fulltext online
    Galbraith et al 2015.pdf (1.489Mb)
    Date
    2015
    Citation:
    Galbraith, M., Krzyżosiak, J., Aguilar, G., Jones, G., & Oliver, R. (2015). Changes in the breeding status of the southern black-backed gull (Larus dominicanus) colonies on Rangitoto Island, Hauraki Gulf, New Zealand. Notornis, 62, pp.192-201.
    Permanent link to Research Bank record:
    https://hdl.handle.net/10652/3450
    Abstract
    The southern black-backed gull (Larus dominicanus) is a common species throughout New Zealand, and has a significant presence in Auckland City. Large colonies are present on Rangitoto Island only 8 km from the city’s centre. The proximity of these colonies to the anthropogenic resources of the city may have influenced breeding locations and local populations. Using field data from the 2012/13 breeding period, we compare the current status of the breeding population on Rangitoto Island with historical data collated from literature. The Rangitoto population exhibited rapid growth throughout the early 20th century, a pattern attributed to environmental changes associated with European settlement and development. Since the 1980s, the colony sizes have declined, a change that is consistent with other gull populations both nationally and globally. The driver of the population changes is likely to be the availability of food and the expansion of vegetation into the colonies. Human disturbance and predation are discounted as impacting on population change.
    Keywords:
    Larus dominicanus (Black-backed gull), southern black-backed gull, kelp gull, Rangitoto Island (Hauraki Gulf, N.Z.), population changes
    ANZSRC Field of Research:
    050211 Wildlife and Habitat Management
    Copyright Holder:
    Ornithological Society of New Zealand Inc.

    Copyright Notice:
    © The Ornithological Society of New Zealand, Inc
    Rights:
    This digital work is protected by copyright. It may be consulted by you, provided you comply with the provisions of the Act and the following conditions of use. These documents or images may be used for research or private study purposes. Whether they can be used for any other purpose depends upon the Copyright Notice above. You will recognise the author's and publishers rights and give due acknowledgement where appropriate.
    Metadata
    Show detailed record
    This item appears in
    • Natural Sciences Journal Articles [148]

    Te Pūkenga

    Research Bank is part of Te Pūkenga - New Zealand Institute of Skills and Technology

    • About Te Pūkenga
    • Privacy Notice

    Copyright ©2022 Te Pūkenga

    Usage

    Downloads, last 12 months
    48
     
     

    Usage Statistics

    For this itemFor the Research Bank

    Share

    About

    About Research BankContact us

    Help for authors  

    How to add research

    Register for updates  

    LoginRegister

    Browse Research Bank  

    EverywhereInstitutionsStudy AreaAuthorDateSubjectTitleType of researchSupervisorCollaboratorThis CollectionStudy AreaAuthorDateSubjectTitleType of researchSupervisorCollaborator

    Te Pūkenga

    Research Bank is part of Te Pūkenga - New Zealand Institute of Skills and Technology

    • About Te Pūkenga
    • Privacy Notice

    Copyright ©2022 Te Pūkenga