UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Fishing for the facts: river dolphin bycatch in a small-scale freshwater fishery in Bangladesh

Dewhurst-Richman, NI; Jones, JPG; Northridge, S; Ahmed, B; Brook, S; Freeman, R; Jepson, P; ... Turvey, ST; + view all (2020) Fishing for the facts: river dolphin bycatch in a small-scale freshwater fishery in Bangladesh. Animal Conservation , 23 (2) pp. 160-170. 10.1111/acv.12523. Green open access

[thumbnail of Article]
Preview
Text (Article)
Turvey Dewhurst-Richman et al. Fishing for the facts. Manuscript. Final_no markup.pdf - Accepted Version

Download (883kB) | Preview
[thumbnail of Supplementary material]
Preview
Text (Supplementary material)
Turvey Dewhurst-Richman et al. Fishing for the facts. Supplementary material.pdf - Accepted Version

Download (1MB) | Preview

Abstract

Fisheries bycatch is a primary driver of cetacean declines, especially for threatened freshwater cetaceans. However, information on the factors influencing cetacean susceptibility to bycatch in small-scale fisheries is limited, impeding development of evidence-based conservation strategies. We conducted 663 interviews with fishers from southern Bangladesh to investigate the influence of net and set characteristics on seasonal bycatch rates of Ganges River dolphins Platanista gangetica gangetica and assess the sustainability of annual mortality levels. Between October 2010-October 2011, 170 bycatch events (and a minimum of 14 mortalities) were reported, 89% of which occurred in gillnets. The probability of bycatch increased as water depth declined, and as net mesh size increased. While the number of recorded bycatch incidents was higher in gillnets, risk of mortality was greater in set bagnets. Our mortality estimate indicates that fisheries-related bycatch currently exceeds the sustainable limit recommended by the International Whaling Commission by 3.5 times. Numerous regulations have been developed to improve the productivity of commercially important fisheries, if regulations were effectively enforced these may also reduce river dolphin bycatch.

Type: Article
Title: Fishing for the facts: river dolphin bycatch in a small-scale freshwater fishery in Bangladesh
Open access status: An open access version is available from UCL Discovery
DOI: 10.1111/acv.12523
Publisher version: https://doi.org/10.1111/acv.12523
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: bycatch; gillnet; Ganges River dolphin; local informant data; Platanista gangetica gangetica, small-scale fisheries
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Genetics, Evolution and Environment
UCL > Provost and Vice Provost Offices > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Dept of Geography
URI: https://discovery.ucl.ac.uk/id/eprint/10077286
Downloads since deposit
894Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item