{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,18]],"date-time":"2026-03-18T23:18:27Z","timestamp":1773875907365,"version":"3.50.1"},"reference-count":65,"publisher":"Inter-Research Science Center","license":[{"start":{"date-parts":[[2025,3,13]],"date-time":"2025-03-13T00:00:00Z","timestamp":1741824000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.int-res.com\/journals\/terms-of-use\/"}],"content-domain":{"domain":["int-res.com"],"crossmark-restriction":false},"short-container-title":["Mar. Ecol. Prog. Ser."],"abstract":"<jats:p>Effective monitoring and reporting of fisheries are crucial for successful management and are typically done by at-sea observers and fishers, respectively. However, this system can produce biased information due to economic and social limitations. Electronic monitoring and reporting systems (EMRs) are becoming more prevalent and are seen as a solution to combat illegal, unreported, and unregulated fishing. The present study aimed to test the effectiveness of an integrated EMR in identifying demersal and deep-sea sharks, skates, and chimaeras (hereafter chondrichthyans), which are bycatch in the Portuguese crustacean bottom trawl fishery. Footage (42 h) was thoroughly examined and provided identification of 2182 individuals representing 11 taxa. The majority were identified to the genus level, and some even to the species level. Only 0.9% of the chondrichthyans could not be identified. Furthermore, the highest bycatch rates of chondrichthyans were from the genera <jats:italic>Etmopterus<\/jats:italic> and <jats:italic>Galeus<\/jats:italic>. The limitations of the technology are discussed, and suggestions for improvement are made to enhance future research proposals and improve the overall design of the system. However, the successful implementation of the EMR in this study and other case studies worldwide demonstrates its potential for upscaling to other fisheries, contributing significantly to more sustainable fishing practices and better management of marine resources.<\/jats:p>","DOI":"10.3354\/meps14801","type":"journal-article","created":{"date-parts":[[2025,1,27]],"date-time":"2025-01-27T10:26:39Z","timestamp":1737973599000},"page":"83-94","update-policy":"https:\/\/doi.org\/10.3354\/policy","source":"Crossref","is-referenced-by-count":1,"title":["Remote monitoring of the bycatch of demersal chondrichthyans using video imagery: a case study from a deep-water crustacean trawler"],"prefix":"10.3354","volume":"756","author":[{"given":"P","family":"Pires da Rocha","sequence":"first","affiliation":[{"name":"CCMAR - Centre of Marine Sciences, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"}]},{"given":"T","family":"Marsili","sequence":"additional","affiliation":[{"name":"OLSPS International, Unipessoal Lda, Rua das Chagas 20, R\/C Esq., 1200-107 Lisboa, Portugal"}]},{"given":"A","family":"Barkai","sequence":"additional","affiliation":[{"name":"OLSPS International, Unipessoal Lda, Rua das Chagas 20, R\/C Esq., 1200-107 Lisboa, Portugal"}]},{"given":"I","family":"Figueiredo","sequence":"additional","affiliation":[{"name":"IPMA - Portuguese Institute for the Sea and Atmosphere, Rua Alfredo Magalh\u00e3es Ramalho 6, 1495-006 Lisboa, Portugal"}]},{"given":"E","family":"Dias","sequence":"additional","affiliation":[{"name":"CIIMAR\/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, Universidade do Porto, Terminal de Cruzeiros do Porto de Leix\u00f5es, Av. General Norton de Matos s\/n, 4450-208 Matosinhos, Portugal"}]},{"given":"T","family":"Modesto","sequence":"additional","affiliation":[{"name":"CCMAR - Centre of Marine Sciences, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"}]},{"given":"P","family":"Relvas","sequence":"additional","affiliation":[{"name":"CCMAR - Centre of Marine Sciences, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"}]},{"given":"A","family":"Teod\u00f3sio","sequence":"additional","affiliation":[{"name":"CCMAR - Centre of Marine Sciences, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"}]},{"given":"S","family":"Graca Aranha","sequence":"additional","affiliation":[{"name":"CCMAR - Centre of Marine Sciences, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"}]}],"member":"1913","published-online":{"date-parts":[[2025,3,13]]},"reference":[{"key":"Ref1","unstructured":"Almeida AJ, Biscoito M (2019) Chaves para a identifica\u00e7\u00e3o dos peixes do Oceano Atl\u00e2ntico oriental, Mar Mediter\u00e2neo e Mar Negro. 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