seanoe:96270 PETITGAS Pierre IFREMER 2023-09-25 ISO 19115:2003/19139 1.0 Otolith growth and individual parameters of anchovy and sardine in the Bay of Biscay 2023 2023-09-25 Boens Andy, Grellier Patrick, Duhamel Erwan, Doray Mathieu, Lebigre Christophe, Bled--Defruit Geoffrey, Petitgas Pierre (2023). Otolith growth and individual parameters of anchovy and sardine in the Bay of Biscay. SEANOE. https://doi.org/10.17882/96270 The data sets presented here result from the long-term monitoring of individual growth patterns in anchovy and sardine in the Bay of Biscay, from 2000 to 2018. They derived from the PELGAS survey series (Doray et al., 2018), which monitors annually the Bay of Biscay pelagic ecosystem since 2000. The survey is performed in May during the peak spawning of anchovy and main spawning of sardine. Among the many data collected, anchovy and sardine populations are assessed by combining acoustic records with pelagic trawl hauls catches and ICES survey protocoles are used, as detailed in Doray et al. (2021). Briefly, fish acoustic backscatter are recorded along survey transect lines and pelagic trawl hauls undertaken opportunistically to identify echotraces to species and collect fish samples for acquiring biometric data. At each trawl haul and for each species, a random subsample of individuals is taken to establish the species’ length distributions. For anchovy and sardine, this subsample is further subsampled, spanning the whole length range, to take individual fish measurements. These amount to extracting otoliths and measuring individuals’ age, length, weight, sexual maturity and other parameters. Individual measurements are taken on fourty individuals of anchovy and sardine when the species are present in the catch. For each individual fish, the two otolith sagittae are extracted on board, mounted in leukit for age reading on board when permitting and/or on land in the laboratory. Growth patterns in the otoliths were analysed on land with a binocular stereomicroscope under reflected natural light. For anchovy, otoliths’ growth was measured for all individuals in all the hauls. For sardine, trawl hauls were selected and all individual otoliths were measured in each selected haul. The selection was made using the geographical stratification defined in Petitgas et al. (2018) based on the ecosystem spatial structure. An average of two to three hauls in each of the four strata were selected per year. The otoliths mounted in leukit were imaged and growth-at-age in the otoliths was measured with the software TNPC (Traitement numérique des pièces calcifiées: Mahé et al., 2009). Under the binocular microscope and natural light, the otoliths showed hyaline (aragonite-poor) rings corresponding to winter periods of low growth and between the rings, white opaque (aragonite-rich) portions corresponding to annual growth periods. The annual ring determination, the age assignment and the measurement of annual ring diameters followed ICES protocoles and guidelines for anchovy and sardine (ICES, 2010; 2011). The age was estimated as the number of hyaline rings. If the edge was hyaline, it was counted as a ring as a hyaline edge observed within the first half of the year is assumed to represent the last winter. The diameter of each annual ring was measured from middle of the hyaline ring on one side to the middle of the ring on the opposite side along the major elongated axis of the otolith and passing through its centre. The distance was expressed in mm after calibration of the stereomiscroscope and the pixel images. Such diameter corresponded to growth-at-age. Ages 0 to 4 were considered (diameters R1 to R5). The total diameter of the otolith was also measured. The data sets span 19 years, from 2000 to 2018 and comprise 20,186 and 8,624 individual fish analyzed at 535 and 235 trawl hauls for anchovy and sardine, respectively. These data sets were used by Boëns et al. (2021 and 2023) to analyse changes in growth patterns and growth-selective mortality at age in anchovy and sardine under environmental and fishing pressures. References: Doray, M., Boyra, G. and Van Der Kooij, J. (eds) (2021). ICES Survey Protocols – Manual for acoustic surveys coordinated under ICES Working Group on Acoustic and Egg Surveys for Small Pelagic Fish (WGACEGG). 1st Edition. ICES Techniques in Marine Environmental Sciences, 64. https://doi.org/10.17895/ices.pub.7462  Doray, M., Petitgas, P., Romagnan, J.-B., Huret, M., Duhamel, E., Dupuy, Ch., Spitz, J., Authier, M., Sanchez, F., Berger, L., Doremus, G., Bourriau, P., Grellier, P. and Masse, J. (2018). The PELGAS survey: ship-based integrated monitoring of the Bay of Biscay pelagic ecosystem. Progress In Oceanography, 166, 15-29. https://doi.org/10.1016/j.pocean.2017.09.015 ICES (2010). Report of the Workshop on Age reading of European anchovy (WKARA), 9-13 November 2009, Sicily, Italy. ICES CM 2009/ACOM: 43. 122 pp. https://doi.org/10.17895/ices.pub.19280525 ICES (2011). Report of the Workshop on Age Reading of European Atlantic Sardine (WKARAS), 14-18 February 2011, Lisbon, Portugal. ICES CM 2011/ACOM:42. 91 pp. https://doi.org/10.17895/ices.pub.19280855 Petitgas, P., Huret, M., Dupuy, Ch., Spitz, J., Authier, M., Romagnan, J.-B. and Doray, M. (2018). Ecosystem spatial structure revealed by integrated survey data. Progress In Oceanography, 166, 189-198. https://doi.org/10.1016/j.pocean.2017.09.012 Mahe, K., Bellail, R., Dufour, J.-L., Boiron-Leroy, A., Dimeet, J., Duhamel, E., Elleboode, R., Felix, J., Grellier, P., Huet, J., Labastie, J., Le Roy, D., Lizaud, O., Manten, M.-L., Martin, S., Metral, L., Nedelec, D., Verin, Y. and Badts, V. (2009). Synthèse française des procédures d'estimation d'âge / French summary of age estimation procedures. https://archimer.ifremer.fr/doc/00000/7294/ Boëns, A., Grellier, P., Lebigre, Ch. and Petitgas, P. (2021). Determinants of growth and selective mortality in anchovy and sardine in the Bay of Biscay. Fisheries Research, 239, 105947. https://doi.org/10.1016/j.fishres.2021.105947 Boëns, A., Ernande, B., Petitgas, P. and Lebigre, Ch. (2023). Different mechanisms underpin the decline in growth of anchovies and sardines of the Bay of Biscay. Evolutionary Applications, 16: 1393–1411. https://doi.org/10.1111/eva.13564   BOENS Andy IFREMER GRELLIER Patrick IFREMER DUHAMEL Erwan IFREMER DORAY Mathieu IFREMER LEBIGRE Christophe IFREMER BLED--DEFRUIT Geoffrey IFREMER PETITGAS Pierre IFREMER SEANOE https://www.seanoe.org/data/00851/96270/illustration.gif Otolith growth biometry anchovy Sardine Bay of Biscay PELGAS Fisheries and aquaculture Fish ODATIS aggregation parameters and Essential Variable names 2024-09-16 geonetwork.thesaurus.external.theme.NVS.OD1 Fisheries and aquaculture SeaDataNet Parameter Disciplines 2021-04-07 geonetwork.thesaurus.external.parameter.NVS.P08 /Observational data/in-situ Type de jeux de donnée ODATIS 2024-10-15 geonetwork.thesaurus.local.theme.type_jeux_donnee CC-BY-NC-SA (Creative Commons - Attribution, No commercial usage, Sharing under the same conditions) Different mechanisms underpin the decline in growth of anchovies and sardines of the Bay of Biscay 2023 Wiley BOËNS ANDY ERNANDE BRUNO PETITGAS PIERRE LEBIGRE CHRISTOPHE 10.1111/eva.13564 Determinants of growth and selective mortality in anchovy and sardine in the Bay of Biscay 2021 Elsevier BV BOËNS ANDY GRELLIER PATRICK LEBIGRE CHRISTOPHE PETITGAS PIERRE 10.1016/j.fishres.2021.105947 ICES Survey Protocols – Manual for acoustic surveys coordinated under ICES Working Group on Acoustic and Egg Surveys for Small Pelagic Fish (WGACEGG). 1st Edition. 2021 ICES DORAY MATHIEU BOYRA GUILLERMO VAN DER KOOIJ JEROEN (EDS) 10.17895/ices.pub.7462 The PELGAS survey: ship-based integrated monitoring of the Bay of Biscay pelagic ecosystem 2018 Pergamon-elsevier Science Ltd DORAY MATHIEU PETITGAS PIERRE ROMAGNAN JEAN-BAPTISTE HURET MARTIN DUHAMEL ERWAN DUPUY CHRISTINE SPITZ JEROME AUTHIER MATTHIEU SANCHEZ FLORENCE BERGER LAURENT DOREMUS GHISLAIN BOURRIAU PAUL GRELLIER PATRICK MASSE JACQUES 10.1016/j.pocean.2017.09.015 Ecosystem spatial structure revealed by integrated survey data 2018 Pergamon-elsevier Science Ltd PETITGAS PIERRE HURET MARTIN DUPUY CHRISTINE SPITZ JEROME AUTHIER MATTHIEU ROMAGNAN JEAN-BAPTISTE DORAY MATHIEU 10.1016/j.pocean.2017.09.012 10.17600/40040 10.17600/1040050 10.17600/2040060 10.17600/3040050 10.17600/4040040 10.17600/5040030 10.17600/6040040 10.17600/7040040 10.17600/8040040 10.17600/9040030 10.17600/10040040 10.17600/11040030 10.17600/12040030 10.17600/13040020 10.17600/14001800 10.17600/15001900 10.17600/16002400 10.17600/17002000 10.17600/18000419 oceans -6.0 0.0 43.0 48.0 CSV ASC https://www.seanoe.org/data/00851/96270/data/104510.csv WWW:DOWNLOAD-1.0-link--download Quality controlled data Anchovy - 1 MB https://www.seanoe.org/data/00851/96270/data/104511.csv WWW:DOWNLOAD-1.0-link--download Quality controlled data Sardine - 1 MB https://www.seanoe.org/data/00851/96270/data/104512.txt WWW:DOWNLOAD-1.0-link--download Description of file headers - 2 KB https://doi.org/10.17882/96270 WWW:LINK-1.0-http--metadata-URL DOI of the product https://www.seanoe.org/data/00851/96270/ rel-canonical Seanoe