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Assessing discards in an illegal small-scale fishery using fisher-led reporting

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Date
28/03/2022
Author
Mendo, Tania
Mendo, J.
Ransijn, Janneke
Gomez, I.
Gil-Kodaka, P.
Fernández, J.
Delgado, R.
Travezaño, M.
Arroyo, R.
Loza, K.
McCann, Paddy
Crowe, S.
Jones, E.
James, Mark Andrew
Keywords
Effort
Tracking
Bycatch
Mobile application
Blue agenda
Trawling
QA75 Electronic computers. Computer science
GC Oceanography
SH Aquaculture. Fisheries. Angling
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Abstract
About a third of all marine fish in the world are caught in Small-Scale Fisheries (SSF). SSF are increasingly recognised as essential for food security and livelihoods for vulnerable and economically fragile communities globally. Although individual SSF vessels are usually perceived as having little impact on the ecosystem, the cumulative impact of gear type and number of vessels may be substantial. Bottom trawling is a common fishing method that can greatly influence the marine ecosystem by damaging the seafloor and generating high levels of discards. However, appropriate sampling coverage using on-board observer programmes to collect these data from SSF are rare, as they are expensive and pose logistical constraints. A mobile App was used to assess whether self-reporting by fishers could provide reliable fine-scale information on fishing effort and discards over time in an illegal shrimp trawling fishery in northern Peru. Maps depicting the spatial distribution of trawling effort and the proportion of discards from observers and fishers were compared using the Similarity in Means (SIM) Index, which ranges from 0 when spatial patterns differ completely to 1 when spatial patterns are very similar. High levels of agreement between spatio-temporal patterns of effort (SIM Index = 0.81) and discards (0.96) were found between fisher and observer maps. Moreover, far greater spatial coverage was accomplished by fishers, suggesting that self-reporting via an App represents a useful approach to collect reliable fisheries data as an initial step for effective monitoring and management of these fisheries.
Citation
Mendo , T , Mendo , J , Ransijn , J , Gomez , I , Gil-Kodaka , P , Fernández , J , Delgado , R , Travezaño , M , Arroyo , R , Loza , K , McCann , P , Crowe , S , Jones , E & James , M A 2022 , ' Assessing discards in an illegal small-scale fishery using fisher-led reporting ' , Reviews in Fish Biology and Fisheries , vol. Online First . https://doi.org/10.1007/s11160-022-09708-9
Publication
Reviews in Fish Biology and Fisheries
Status
Peer reviewed
DOI
https://doi.org/10.1007/s11160-022-09708-9
ISSN
0960-3166
Type
Journal item
Rights
Copyright © The Author(s) 2022. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Description
Funding: Newton Fund (IL 2018-Grant Agreement 414695818 James PER), Fondo Nacional de Desarrollo Científico, Tecnológico y de Innovación Tecnológica (PE) (FONDECYT 2018-222).
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/25126

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