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Impact of fisheries on sea turtles

The bycatch of sea turtles by industrial fisheries is receiving an increasing attention in recent years due to the high impact it causes on these endangered species. This issue was evaluated in southern Spain waters that harbors an important feeding ground of loggerhead and leatherback turtles, including the endangered Eastern Atlantic loggerhead population. To quantify the impact that different fisheries represents to sea turtles, 272 fishermen answered to detailed illustrated questionnaires in all the main ports of Andalusia and Murcia (Spain) during 2014. This study has updated the knowledge of turtle bycatch in the southwestern Mediterranean revealing a widespread impact of fisheries on sea turtles. Fishermen recognized an annual catch of 2.3 turtles per boat. Considering the census of industrial fishing boats in the study area (1182), more than 2840 sea turtles could be bycaught per year in the study area. Most of captures (96.2%) were produced during the summer. These results suggest a severe impact of most of legal fisheries (surface longline, pursue seine, trawling and small scale fisheries) on loggerhead feeding grounds in the southwestern Mediterranean. Fishermen suggests that drift fishing conducted by foreign or illegal fishermen and almadrabas are also causing a significant bycatch of turtles. Several measures such as reviewing compliance of current fishing and environmental regulations, modifying turtle technics to reduce turtle bycatch (e.g. reduction of the use of squid as bait and disposal of hooks deeper in the water column), facilitating the rescue and handle of wound turtles and their transport to the port for recovery, and recognizing the efforts of anglers to perform a more sustainable fishing, are recommended to mitigate this impact. informacion[at]ebd.csic.es: Marco et al (2020) Sea turtle bycatch by different types of fisheries in southern Spain. Basic and Applied Herpetology https://doi.org/10.11160/bah.187


http://ojs.herpetologica.org/index.php/bah/article/view/187
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BMS Spain: Annual Report 2017

BMS Spain: Annual Report 2017

BMS Spain is a butterfly monitoring program created in 2014 with the aim of creating a tool for studying the butterfly populations and their habitats of in Spain. Through monitoring, among others, population trends, phenological changes and the conservation status of species can be known. The large scale infrastructure of EBD-CSIC (ICTS-RBD) supports this initiative through its data platform. In 2017 the participants of this program, mostly volunteers, have been recording the presence of butterflies in a total of 76 transects during 12 visits to each one, on average. In total, 55,927 butterflies belonging to 176 species were counted in 12,506 sightings. The most abundant species was Melanargia lachesis with 2,697 individuals, while the highest number of individuals was registered in Garganta la Olla (Cáceres), being 4,238. Castelfrío (Teruel) was, as in 2016, most diverse area with 79 species. The average abundance, species richness, visits and average diversity were higher in 2017. informacion[at]ebd.csic.es Cancela et al (2018) Butterfly Monitoring Scheme España. Informe anual de 2017


http://observa.ebd.csic.es/web/seguimientomariposas/sobre-bms