The aim of this study was to provide practitioners working with trawl selectivity with general and easily understandable guidelines regarding the fish sampling effort necessary during sea trials. In particular, we focused on how many fish would need to be caught and length measured in a trawl haul in order to assess the selectivity parameters of the trawl at a designated uncertainty level. We a...

Total mercury (THg) and methylmercury (MeHg) concentrations were investigated in two different species from the Izmir Bay. The levels of THg and MeHg in fish tissue, ranging from 4.4 to 221.4 μg THg kg and 3.8-194.8 μg MeHg kg (wet wt.), varied according to sampling point and season. The results indicate that none of the fish analysed was ≥ 0.500 μg g for THg and ≥ 0.300 μg g for MeHg and nor d...

The size selectivity of trammel nets was investigated in the northern Aegean Sea using 10 different inner-panel mesh sizes ranging from 16 to 70 mm nominal (bar length). Selectivity estimates were made for eight most abundant target and bycatch fish species, namely black scorpionfish, Scorpaena porcus Linnaeus, 1758; annular seabream, Diplodus annularis (Linnaeus, 1758); red mullet, Mullus barb...

The catch of large quantities sublegal-sized fish and shrimp is a pervasive feature bottom trawl fisheries, particularly in the Mediterranean demersal mixed fisheries where regulations traditionally allow small mesh sizes. To address these concerns, two net selectivity trials were carried out 2019 2020 on fishing grounds worked by fleet Spanish Mediterranean, under normal commercial operating c...