TRaCK: Tropical Rivers and Coastal Knowledge

Science and knowledge that governments, communities, industries for sustainable use of Australia's tropical rivers and estuaries

Age and Growth Patterns of the bull (Carcharhinus leucas) and pigeye (C. amboinensis) sharks in NT waters, Coast 2 Coast Conference, Darwin 2008

TitleAge and Growth Patterns of the bull (Carcharhinus leucas) and pigeye (C. amboinensis) sharks in NT waters, Coast 2 Coast Conference, Darwin 2008
Publication TypePresentation
Year of Publication2008
AuthorsTillett, B
Keywords5: Foodwebs and biodiversity
Abstract

The removal of elasmobranchs as apex predators by fishing has had catastrophic effects on both global marine ecosystem function and services. Ecosystem-based management strategies are required to ensure the continued persistence of elasmobranchs in marine environments and information on age and growth are key parameters that are required for this approach. Here, we will describe and compare the age structure and growth dynamics of two common carcharhinids, the bull (Carcharhinus leucas) and pigeye (C. amboinensis) sharks. The bull shark is classified by the IUCN as globally threatened due to anthropogenic influences on freshwater and estuarine nursery areas that reduce juvenile survival and the high levels of by-catch of the species in many coastal fisheries. The pig eye shark occupies a similar habitat and is subject to the same stressors, but is classified by the IUCN as data deficient, emphasising the need for life history and demographic information to facilitate an accurate assessment of population and species viability.
Link to presentation:
http://www.coast2coast.org.au/PresentationPDFs/Tillett.pdf

URLhttp://www.coast2coast.org.au/PresentationPDFs/Tillett.pdf