Distribution, habitat and biology of a rare and threatened eastern Australian endemic shark

Colclough's shark, Brachaelurus colcloughi Ogilby, 1908

Peter Kyne, Leonard Compagno, Joanna Stead, Micha Jackson, Michael Bennett

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    Despite increasing research effort and conservation focus on sharks, small species of little commercial value are often overlooked, although they make a considerable contribution to global diversity. The poorly known Colclough's shark, Brachaelurus colcloughi, is naturally rare to uncommon and is encountered only irregularly. Collating all known records (n=50), we review the species' geographic and bathymetric distribution, habitat, reproductive biology and diet. All but four B. colcloughi records are from within a core distribution of <2° latitude on the Australian east coast. Bathymetric distribution is from less than 4 to 217m depth, with all but three records from less than 100m depth. The species shelters on rocky reefs during the day and is thought to forage nocturnally around reefs and adjacent substrates. B. colcloughi is viviparous, with litter sizes of 6-7. Mature males and females have been observed from 61.0- and 54.5-cm total length, respectively. Gravid females have been collected in austral winter months. Dietary analysis indicates a predominantly piscivorous diet. Our results are placed in the context of existing threats and future research and management directions, demonstrating that shark species with low abundances and restricted ranges, such as B. colcloughi, require a suite of management arrangements to ensure long-term population viability. 
    Original languageEnglish
    Pages (from-to)540-547
    Number of pages8
    JournalMarine and Freshwater Research
    Volume62
    Issue number6
    DOIs
    Publication statusPublished - 2011

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    Biological Sciences
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    habitats
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    Litter Size
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    Cite this

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    abstract = "Despite increasing research effort and conservation focus on sharks, small species of little commercial value are often overlooked, although they make a considerable contribution to global diversity. The poorly known Colclough's shark, Brachaelurus colcloughi, is naturally rare to uncommon and is encountered only irregularly. Collating all known records (n=50), we review the species' geographic and bathymetric distribution, habitat, reproductive biology and diet. All but four B. colcloughi records are from within a core distribution of <2° latitude on the Australian east coast. Bathymetric distribution is from less than 4 to 217m depth, with all but three records from less than 100m depth. The species shelters on rocky reefs during the day and is thought to forage nocturnally around reefs and adjacent substrates. B. colcloughi is viviparous, with litter sizes of 6-7. Mature males and females have been observed from 61.0- and 54.5-cm total length, respectively. Gravid females have been collected in austral winter months. Dietary analysis indicates a predominantly piscivorous diet. Our results are placed in the context of existing threats and future research and management directions, demonstrating that shark species with low abundances and restricted ranges, such as B. colcloughi, require a suite of management arrangements to ensure long-term population viability. ",
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    author = "Peter Kyne and Leonard Compagno and Joanna Stead and Micha Jackson and Michael Bennett",
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    Distribution, habitat and biology of a rare and threatened eastern Australian endemic shark : Colclough's shark, Brachaelurus colcloughi Ogilby, 1908. / Kyne, Peter; Compagno, Leonard; Stead, Joanna; Jackson, Micha; Bennett, Michael.

    In: Marine and Freshwater Research, Vol. 62, No. 6, 2011, p. 540-547.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

    T1 - Distribution, habitat and biology of a rare and threatened eastern Australian endemic shark

    T2 - Colclough's shark, Brachaelurus colcloughi Ogilby, 1908

    AU - Kyne, Peter

    AU - Compagno, Leonard

    AU - Stead, Joanna

    AU - Jackson, Micha

    AU - Bennett, Michael

    PY - 2011

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    N2 - Despite increasing research effort and conservation focus on sharks, small species of little commercial value are often overlooked, although they make a considerable contribution to global diversity. The poorly known Colclough's shark, Brachaelurus colcloughi, is naturally rare to uncommon and is encountered only irregularly. Collating all known records (n=50), we review the species' geographic and bathymetric distribution, habitat, reproductive biology and diet. All but four B. colcloughi records are from within a core distribution of <2° latitude on the Australian east coast. Bathymetric distribution is from less than 4 to 217m depth, with all but three records from less than 100m depth. The species shelters on rocky reefs during the day and is thought to forage nocturnally around reefs and adjacent substrates. B. colcloughi is viviparous, with litter sizes of 6-7. Mature males and females have been observed from 61.0- and 54.5-cm total length, respectively. Gravid females have been collected in austral winter months. Dietary analysis indicates a predominantly piscivorous diet. Our results are placed in the context of existing threats and future research and management directions, demonstrating that shark species with low abundances and restricted ranges, such as B. colcloughi, require a suite of management arrangements to ensure long-term population viability. 

    AB - Despite increasing research effort and conservation focus on sharks, small species of little commercial value are often overlooked, although they make a considerable contribution to global diversity. The poorly known Colclough's shark, Brachaelurus colcloughi, is naturally rare to uncommon and is encountered only irregularly. Collating all known records (n=50), we review the species' geographic and bathymetric distribution, habitat, reproductive biology and diet. All but four B. colcloughi records are from within a core distribution of <2° latitude on the Australian east coast. Bathymetric distribution is from less than 4 to 217m depth, with all but three records from less than 100m depth. The species shelters on rocky reefs during the day and is thought to forage nocturnally around reefs and adjacent substrates. B. colcloughi is viviparous, with litter sizes of 6-7. Mature males and females have been observed from 61.0- and 54.5-cm total length, respectively. Gravid females have been collected in austral winter months. Dietary analysis indicates a predominantly piscivorous diet. Our results are placed in the context of existing threats and future research and management directions, demonstrating that shark species with low abundances and restricted ranges, such as B. colcloughi, require a suite of management arrangements to ensure long-term population viability. 

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    KW - bathymetry

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    KW - commercial species

    KW - conservation management

    KW - diet

    KW - endangered species

    KW - endemic species

    KW - fishing effort

    KW - foraging behavior

    KW - geographical distribution

    KW - habitat type

    KW - latitude

    KW - literature review

    KW - litter size

    KW - management practice

    KW - observational method

    KW - piscivory

    KW - population distribution

    KW - range expansion

    KW - rare species

    KW - Red List

    KW - reef

    KW - reproductive biology

    KW - research work

    KW - shark

    KW - species diversity

    KW - water depth

    KW - Australia

    KW - Brachaelurus

    KW - Chondrichthyes

    KW - Heteroscyllium

    U2 - 10.1071/MF10160

    DO - 10.1071/MF10160

    M3 - Article

    VL - 62

    SP - 540

    EP - 547

    JO - Marine & Freshwater Research

    JF - Marine & Freshwater Research

    SN - 0067-1940

    IS - 6

    ER -