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dc.contributor.authorTemple, Andrew Jen_UK
dc.contributor.authorStead, Selina Men_UK
dc.contributor.authorJiddawi, Narrimanen_UK
dc.contributor.authorWambiji, Ninaen_UK
dc.contributor.authorDulvy, Nicholas Ken_UK
dc.contributor.authorBarrowclift, Ellenen_UK
dc.contributor.authorBerggren, Peren_UK
dc.description.abstractThe Baraka's whipray (Maculabatis ambigua ) is a major constituent of small‐scale fisheries catch in the southwestern Indian Ocean. Despite this, little is known of its life‐history or exploitation status. We provide the first estimates of crucial life‐history parameters and maximum intrinsic population growth rate r max , using specimens collected from small‐scale fisheries landings in Kenya, Zanzibar, and Madagascar (with northern Madagascar representing a range extension for this species). We then assess relative risk of overexploitation by combining r max with estimates of total Z , fishing F and natural M mortality, and an estimate of the exploitation ratio E . The data indicate that Baraka's whipray is a medium‐sized, fast‐growing, early maturing species, with a relatively long lifespan. This results in a high r max relative to many other elasmobranchs which when combined with estimates of F suggest that the species is not at imminent risk of extinction. Yet, estimates of exploitation ratio E suggest likely overfishing for the species, with full recruitment to the fishery being post‐maturation and exploitation occurring across a broad range of age and size classes. Thus, Baraka's whipray is unlikely to be biologically sustainable in the face of current fisheries pressures. This paper makes an important contribution to filling the gap in available data and is a step towards developing evidence‐based fisheries management for this species. Further, it demonstrates a simple and widely applicable framework for assessment of data‐poor elasmobranch exploitation status and extinction risk.en_UK
dc.relationTemple AJ, Stead SM, Jiddawi N, Wambiji N, Dulvy NK, Barrowclift E & Berggren P (2020) Life-history, exploitation and extinction risk of the data-poor Baraka's whipray (Maculabatis ambigua) in small-scale tropical fisheries. Journal of Fish Biology.
dc.rights© 2020 The Authors. Journal of Fish Biology published by John Wiley & Sons Ltd on behalf of The Fisheries Society of the British Isles. This is an open access article under the terms of the Creative Commons Attribution License (, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en_UK
dc.subjectr maxen_UK
dc.subjectIndian Oceanen_UK
dc.titleLife-history, exploitation and extinction risk of the data-poor Baraka's whipray (Maculabatis ambigua) in small-scale tropical fisheriesen_UK
dc.typeJournal Articleen_UK
dc.citation.jtitleJournal of Fish Biologyen_UK
dc.type.statusVoR - Version of Recorden_UK
dc.description.notesOutput Status: Forthcoming/Available Onlineen_UK
dc.contributor.affiliationNewcastle Universityen_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationUniversity of Dar es Salaamen_UK
dc.contributor.affiliationKenya Marine and Fisheries Research Instituteen_UK
dc.contributor.affiliationSimon Fraser Universityen_UK
dc.contributor.affiliationNewcastle Universityen_UK
dc.contributor.affiliationNewcastle Universityen_UK
Appears in Collections:Aquaculture Journal Articles

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