Browsing by Author "Maina, Irida"
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- Marine spatial closures as a supplementary tool to reduce discards in bottom trawl fisheries: examples from southern European watersPublication . Despoti, Smaragda; Milisenda, Giacomo; Ligas, Alessandro; Bentes, Luis; Maynou, Francesc; Vitale, Sergio; Garofalo, Germana; Sbrana, Mario; Erzini, Karim; Tserpes, George; Tsagarakis, Konstantinos; Maina, Irida; Pyrounaki, Maria-Myrto; Papadopoulou, Nadia; Machias, Athanassios; Colloca, Francesco; Fiorentino, Fabio; Stergiou, Konstantinos, I; Giannoulaki, MariannaDiscards is an important issue in fisheries around the world. the spatial management of discards has attracted interest as a potential tool for minimizing the unwanted catch. the aim of the present work was to identify areas with high quantities of bottom trawl discarded catch regarding species subjected to MCRS, in six areas of southern European waters (southern Portuguese waters, Catalan Sea, Ligurian and northern Tyrrhenian Seas, Strait of Sicily, eastern Ionian Sea, and Aegean Sea). Analyses were based on two types of data: (a) the undersized catch of species subjected to MCRS from bottom trawl surveys and (b) the actual discarded catch (including undersized and non-undersized individuals) of species subjected to MCRS from commercial bottom trawling. Geostatistical analysis techniques were applied to the first type of data and Generalized Additive Models using environmental variables were applied to the second one. Subsequently, areas that persistently presented high quantities of discarded catch (i.e., "iDC grounds") or undersized catch (i.e., "iUC grounds") were identified and mapped. the "iDC grounds"/"iUC grounds" were located either over the slope or within the continental shelf and over marine plateaus, largely depending on the main target species of each fishery. Next, the overlap of "iDC grounds"/"iUC grounds" with the existing Fisheries Restricted Areas (FRAs) and the proposed Marine Protected Areas (MPAs) was estimated aiming to explore how spatial closures could contribute to the reduction of bottom trawl discarded catch/undersized catch. Certain spatial closures were more effective in the Central Mediterranean and others to the Eastern Mediterranean. the overlapping of existing FRAs with "iDC grounds"/`iUC grounds" did not exceed 24 % in any study area, whereas proposed MPAs, like the CIESM Marine Peace Parks, reached up to 90 % for the same study area.
- The MINOUWApp: a web-based tool in support of by-catch and discards managementPublication . D’Andrea, Lorenzo; Campos, Aida; Erzini, Karim; Fonseca, Paulo; Franceschini, Simone; Kavadas, Stefanos; Maina, Irida; Maynou, Francesc; Russo, TommasoCurrent fishing practices often do not allow adequate selection of species or sizes of fish, resulting in unwanted catches, subsequently discarded, with the consequent negative effects on both marine communities and fisheries profitability. The cross-analysis of density patches of potential unwanted catches and distribution of fishing effort can support the identification of spatial-temporal hot-spots in which the fishing pressure should be reduced to limit the amount of discards. The MinouwApp represents a technological and methodological framework to bring different, and structurally complex, sources of georeferenced data together into a simple visual interface aiming to interactively explore temporal ranges and areas of interest. The objective is to improve the understanding of fisheries dynamics, including discards, thus contributing to the implementation of discard management plans in a context of participative, ecosystem-based fisheries management strategies.