Trends of white grouper landings in the Northeastern Mediterranean: reliability and potential use for monitoring
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27 avril 2020
- handle: 10670/1.kbgxip
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SINAN MAVRUK, « Trends of white grouper landings in the Northeastern Mediterranean: reliability and potential use for monitoring », eJournals, ID : 10670/1.kbgxip
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As a consequence of national fishery statistics showing a sharp decline in the landings of white groupers (WG), Epinephelus aeneus (Geoffroy Saint-Hilaire, 1817) after 2010, the decision to ban any further fishing of the species was implemented by the Turkish management authority in 2016. Stakeholders have since strongly objected to this decision claiming that the trends of landing statistics are unreliable. Here, this assertion is questioned using multiple sources of data. The catch per unit effort (CPUE) from the fishery independent bottom trawl survey (2004-2018) officially reported landing statistics (2002-2017) and the microdata set of landings (2012-2016) gathered by the Turkish Statistical Institute (TUIK). Based on the results of this study, there was a clear parallelism amongst the data sets. Landing records and the CPUE time series revealed unimodal non-linear patterns along the time (p