urn:SDN:CSR:LOCAL:SI29201707010 utf8 Campaña/Survey Cruise Summary record Instituto Español de Oceanografía Ifremer, Scientific Information Systems for the sea N/A France N/A pointOfContact 2021-11-29 ISO 19115/SeaDataNet profile 1.0 SeaDataNet geographic co-ordinate reference frames L10 2011-03-03 revision 3 https://www.seadatanet.org/urnurl/SDN:L10 World Geodetic System 84 Campaña: PELMED 2017 Survey: PELMED 2017 Referencia IEO: FI352017005300 IEO ID: FI352017005300 2017-08-03 creation urn:SDN:CSR:LOCAL:17005300 urn:SDN:CSR:LOCAL:17005300 Ifremer, Station de Sete Ifremer, Station de Sete N/A France N/A originator Small pelagic fish are both the keystone species of the ecosystem because of the central position they hold in the food chain and represent highly significant economic stakes for fisheries since they make up the majority of landings in the French Mediterranean (approximately 50% of catches for sardines and anchovies; Demaneche et al. 2009). So, to assess stocks and propose appropriate management methods, it is important to have both good knowledge about these species and independent fisheries data. Ifremer's fisheries science laboratory in Sète has monitored these populations since the 1990s. In 2002, the EU asked Member States to formalize certain operations by contract, in this context, the PELMED cruise was part of the extended contractual programme for biomass assessment (DCF). Therefore, each year France is obliged to assess the biomass of small pelagic species in the Mediterranean, in order to determine the stocks' status and propose management measures. These assessments are carried out in the framework of the general fisheries commission for the Mediterranean (CGPM). Since numerous countries had begun monitoring these species using acoustic methods, the MEDIAS (MEDIterannean Acoustic Surveys) scientific group was created in 2008 with the objective of standardizing the protocols. Finally, national management plans for Gulf of Lion fisheries were set up in 2014 (particularly for pelagic trawlers and purse seines) with scientific objectives touching on the biomass of small pelagics. The PELMED cruise, whose main aim is to directly assess the small pelagics biomass, is conducted therefore in a clearly institutional framework (national, European and Mediterranean). However, the scientific stakes remain just as important. Since 2008, a special situation has been observed in the Gulf of Lion, where the biomasses of sardines and anchovies (and even mackerel) have decreased synchronously. Even more unexpectedly, although the recruitment rates observed over the past few years in the species are particularly high, the populations don't seem to be growing back and their biomass is continuing to drop. This is particularly surprising in a marine ecosystem where recruitment is generally considered to be the determining factor of population dynamics for species with a short life span. The collection of biological parameters on species of small pelagics done during the previous PELMED cruises made it possible to highlight significant demographic changes (loss of large age classes, decrease in size, poorer body condition) which seem to suggest "bottom-up" population control. Therefore, the ecosystem-based nature of the PELMED cruises (from physical parameters to top predators, not to mention phyto- and zooplankton and fodder fish) appears to be crucial in understanding the dynamics of these populations. It was decided this year to stop prospecting the Catalan Sea, in order to extend the spatial coverage to the east of the Gulf in the PACA region (from Marseille to Nice). Since the narrowness of the shelf in this zone does not allow for prospecting along "classic" legs, the objective will be to validate a prospection method which is adapted to the area. Small pelagic fish are both the keystone species of the ecosystem because of the central position they hold in the food chain and represent highly significant economic stakes for fisheries since they make up the majority of landings in the French Mediterranean (approximately 50% of catches for sardines and anchovies; Demaneche et al. 2009). So, to assess stocks and propose appropriate management methods, it is important to have both good knowledge about these species and independent fisheries data. Ifremer's fisheries science laboratory in Sète has monitored these populations since the 1990s. In 2002, the EU asked Member States to formalize certain operations by contract, in this context, the PELMED cruise was part of the extended contractual programme for biomass assessment (DCF). Therefore, each year France is obliged to assess the biomass of small pelagic species in the Mediterranean, in order to determine the stocks' status and propose management measures. These assessments are carried out in the framework of the general fisheries commission for the Mediterranean (CGPM). Since numerous countries had begun monitoring these species using acoustic methods, the MEDIAS (MEDIterannean Acoustic Surveys) scientific group was created in 2008 with the objective of standardizing the protocols. Finally, national management plans for Gulf of Lion fisheries were set up in 2014 (particularly for pelagic trawlers and purse seines) with scientific objectives touching on the biomass of small pelagics. The PELMED cruise, whose main aim is to directly assess the small pelagics biomass, is conducted therefore in a clearly institutional framework (national, European and Mediterranean). However, the scientific stakes remain just as important. Since 2008, a special situation has been observed in the Gulf of Lion, where the biomasses of sardines and anchovies (and even mackerel) have decreased synchronously. Even more unexpectedly, although the recruitment rates observed over the past few years in the species are particularly high, the populations don't seem to be growing back and their biomass is continuing to drop. This is particularly surprising in a marine ecosystem where recruitment is generally considered to be the determining factor of population dynamics for species with a short life span. The collection of biological parameters on species of small pelagics done during the previous PELMED cruises made it possible to highlight significant demographic changes (loss of large age classes, decrease in size, poorer body condition) which seem to suggest "bottom-up" population control. Therefore, the ecosystem-based nature of the PELMED cruises (from physical parameters to top predators, not to mention phyto- and zooplankton and fodder fish) appears to be crucial in understanding the dynamics of these populations. It was decided this year to stop prospecting the Catalan Sea, in order to extend the spatial coverage to the east of the Gulf in the PACA region (from Marseille to Nice). Since the narrowness of the shelf in this zone does not allow for prospecting along "classic" legs, the objective will be to validate a prospection method which is adapted to the area. BOURDEIX Jean-Hervé Ifremer, Station de Sete Ifremer, Station de Sete +33(0)4 99 57 32 00 +33 (0)4 99 57 32 94 France sdn-userdesk@seadatanet.org pointOfContact Oceanographic geographical features theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Sète departure_place SeaDataNet Ports Gazetteer C38 2007-09-20 revision https://www.seadatanet.org/urnurl/SDN:C38 Sète arrival_place SeaDataNet Ports Gazetteer C38 2007-09-20 revision https://www.seadatanet.org/urnurl/SDN:C38 France departure_country International Standards Organisation countries C32 2007-08-22 revision https://www.seadatanet.org/urnurl/SDN:C32 France arrival_country International Standards Organisation countries C32 2007-08-22 revision https://www.seadatanet.org/urnurl/SDN:C32 L'Europe platform ICES Platform Codes C17 2007-05-14 revision https://www.seadatanet.org/urnurl/SDN:C17 research vessel platform_class SeaVoX Platform Categories L06 2007-01-13 revision https://www.seadatanet.org/urnurl/SDN:L06 Mediterranean Sea, Western Basin place SeaVoX salt and fresh water body gazetteer C19 2007-03-01 revision https://www.seadatanet.org/urnurl/SDN:C19 thermosalinographs single-beam echosounders multi-beam echosounders meteorological packages discrete water samplers CTD instrument SeaDataNet device categories L05 2007-03-01 publication https://www.seadatanet.org/urnurl/SDN:L05 Not applicable utf8 oceans 3.000000 6.000000 42.400000 43.500000 2017-07-01T00:00:00Z 2017-08-03T00:00:00Z XML 1 https://csr.seadatanet.org/ WWW:LINK-1.0-http--related Base de datos internacional con información de campañas desde 1873 hasta la actualidad. La presente campaña la podrás encontrar como PELMED 2017. International database with information of surveys from 1873 till today. Use the tag PELMED 2017 to locate the present survey. SeaDataNet - CRS inventory https://cdi.seadatanet.org/search WWW:LINK-1.0-http--related Descubre si hay datos de esta campaña disponibles, utilizando para ello la etiqueta PELMED 2017 en el buscador de datos de SeaDataNet. Discover if there are available data associated to this cruise by using the tag PELMED 2017 in the free search box of the SeaDataNet portal. SeaDataNet - CDI inventory Campaña/Survey Reglamento (UE) n o 1089/2010 de la Comisión de 23 de noviembre de 2010 por el que se aplica la Directiva 2007/2/CE del Parlamento Europeo y del Consejo en lo que se refiere a la interoperabilidad de los conjuntos y los servicios de datos espaciales Commission Regulation (EU) No 1312/2014 of 10 December 2014 amending Regulation (EU) No 1089/2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data services 2010-12-08 publication See the referenced specification true Reglamento (UE) n o 1089/2010 de la Comisión de 23 de noviembre de 2010 por el que se aplica la Directiva 2007/2/CE del Parlamento Europeo y del Consejo en lo que se refiere a la interoperabilidad de los conjuntos y los servicios de datos espaciales Commission Regulation (EU) No 1312/2014 of 10 December 2014 amending Regulation (EU) No 1089/2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data services 2010-12-08 publication See the referenced specification true El Centro de datos aplica controles de calidad estandarizados a todos los datos de los que es responsable. Contacta con el Centro de datos para más información. The Data Center applies standard data quality control procedures on all data. Ask the Data Center for details.