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The aim of this study was to investigate the effects of glass eel fishing in the Mondego estuary on target and non-target species. Samples were collected between November 2011 and March 2013 during the autumn and winter (dry and regular respectively with regard to hydrological characteristics) in 2 years. No differences in glass eel catches were observed between fishing seasons; however, a higher number of non-target species was observed in 2012\u201313 (regular year). There was higher species diversity in the regular year, as well as the highest number of individuals. Higher catches of the most abundant species were also observed in the regular year, compared with the dry year, suggesting that the magnitude of the effect of these illegal practices is related to hydrological cycles. Despite the low replication (2 years), the present study shows that non-selective practices have considerable effects on the species captured, as well as on the functioning of the estuarine ecosystem.<\/jats:p>","DOI":"10.1071\/mf17364","type":"journal-article","created":{"date-parts":[[2018,7,23]],"date-time":"2018-07-23T01:24:53Z","timestamp":1532309093000},"page":"1692-1703","source":"Crossref","is-referenced-by-count":5,"title":["Effect of illegal glass eel (Anguilla anguilla) fishery on estuarine fish stocks: a case study in the Mondego Estuary, Portugal"],"prefix":"10.1071","volume":"69","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7875-3382","authenticated-orcid":true,"given":"Jo\u00e3o Bernardo","family":"Neves","sequence":"first","affiliation":[{"name":"ACentre for Functional Ecology, Department of Life Sciences, University of Coimbra, Cal\u00e7ada Martim de Freitas, PT-3000-456 Coimbra, Portugal."},{"name":"BMarine and Environmental Sciences Centre, University of the Azores, Rua Prof. Dr Frederico Machado, 4, PT-9900-138 Horta, A\u00e7ores, Portugal."},{"name":"CPresent address: Okeanos \u2013 R&D Centre, University of the Azores, Rua Prof. Dr Frederico Machado, 4, PT-9900-138 Horta, A\u00e7ores, Portugal."},{"name":"DCorresponding author. Email: jfbneves@gmail.pt"}]},{"given":"Filipe","family":"Martinho","sequence":"additional","affiliation":[{"name":"ACentre for Functional Ecology, Department of Life Sciences, University of Coimbra, Cal\u00e7ada Martim de Freitas, PT-3000-456 Coimbra, Portugal."}]},{"given":"Miguel \u00c2ngelo","family":"Pardal","sequence":"additional","affiliation":[{"name":"ACentre for Functional Ecology, Department of Life Sciences, University of Coimbra, Cal\u00e7ada Martim de Freitas, PT-3000-456 Coimbra, Portugal."}]}],"member":"67","published-online":{"date-parts":[[2018,7,23]]},"reference":[{"issue":"2","key":"2025120823541234800_R1","doi-asserted-by":"publisher","first-page":"e4570","DOI":"10.1371\/JOURNAL.PONE.0004570","article-title":"Estimating the worldwide extent of illegal fishing.","volume":"4","author":"Agnew","year":"2009","journal-title":"PLoS One"},{"key":"2025120823541234800_R2"},{"key":"2025120823541234800_R3","first-page":"131","article-title":"The glass eel fishery and the 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