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Changes in habitat preference of tuna species and implication for regional fisheries management: southern bluefin tuna fishing in the Indian Ocean

Citation

O'Shea, EJA, Changes in habitat preference of tuna species and implication for regional fisheries management: southern bluefin tuna fishing in the Indian Ocean, Australian Journal of Maritime and Ocean Affairs, 8, (2) pp. 117-131. ISSN 1836-6503 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 Informa UK Limited, trading as Taylor & Francis Group

DOI: doi:10.1080/18366503.2016.1191789

Abstract

Changes in the oceanís physical environment and its impact on ecosystems are well recorded in the literature and are likely to impact on the range and distribution of tuna species. This paper examines the impacts of these factors on the southern bluefin tuna (SBT) (Thunnus maccoyii), a species of low population abundance that is the focus of a high-value fishery. Oceanic warming has been projected to facilitate the expansion of such tropical tunas whilst reducing the northern distribution of temperate tunas such as the SBT. The study analysed the distribution of SBT using historical fisheries data collected by the Commission for the Conservation of SBT and the Indian Ocean Tuna Commission with the latitudes of fishing events and catches used as a proxy for SBT presence. Whilst these data do not provide conclusive evidence of a southerly shift in habitat preference, they do show increasing overlap between the SBT and with yellowfin tuna (Thunnus albacares). The paper concludes that while shifts in fishing effort in the Indian Ocean have a number of potential drivers, including changes in fish habitat, they highlight potential challenges to current regional management arrangements.

Item Details

Item Type:Refereed Article
Keywords:habitat preference, southern bluefin tuna, fisheries management, Indian Ocean
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Fisheries Management
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Wild Caught Tuna
Author:O'Shea, EJA (Mr Eldene O'Shea)
ID Code:109873
Year Published:2016
Deposited By:Centre for Fisheries and Aquaculture
Deposited On:2016-07-06
Last Modified:2016-12-13
Downloads:0

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