00000nam 2200000zi 4500 9.903852 CaOODSP 20230501141951 m o d f cr mn||||||||| 211005t20222022qucab ob f000 0 eng d 9780660405308 CaOODSP eng rda CaOODSP eng eng fre n-cn-qu n-cnm-- n-cn-nf Fs97-6/3445E-PDF Senay, Caroline, author. Identifying two redfish species, Sebastes mentella and S. fasciatus, in fishery and survey catches using anal fin ray count in Units 1 and 2 / by Caroline Senay, Tom Bermingham, Geneviève J. Parent, Hugues P. Benoît, Éric Parent, and Audrey Bourret. Mont Joli, QC : Fisheries and Oceans Canada, Maurice Lamontagne Institute, 2022. ©2022 1 online resource (viii, 46 pages) : illustrations (chiefly colour), maps (chiefly colour). text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian technical report of fisheries and aquatic sciences, 1488-5379 ; 3445 Issued also in French under title: Identification de deux espèces de sébastes, Sebastes mentella et S. fasciatus, dans les prises des pêches et des relevés par le nombre de rayons de la nageoire anale dans les unités 1 et 2. Includes bibliographical references (pages 16-17). "Two species of Redfish are present in the Gulf of St. Lawrence (Unit 1) and Laurentian Channel (Unit 2): Sebastes mentella and S. fasciatus. However, both species are morphologically similar and have been identified as "Sebastes spp." in both stock assessments until 2010 and in the fishery. The malate dehydrogenase locus (MDH-A*) has been used to genetically identify Redfish species at the individual level and to determine the probability distribution of soft anal fin ray (AFR) counts which are used to estimate species compositions at the catch level. This report documents the AFR method that is currently used in survey and how it could be applied to the fishery. The objectives are to 1- compare MDH-A* and microsatellite markers for species identification at the individual level, 2- describe species composition at the catch level using AFR counts, 3- estimate Redfish species composition in catches and describe biases using AFR counts, 4- validate the accuracy of data collected by observers-at-sea (ASO) and port-samplers, and 5- assess species distribution relative to spatial and depth gradients"--Abstract, page vii. Includes abstracts in English and French. Sebastes mentella Saint Lawrence, Gulf of. Sebastes mentella Laurentian Channel (N.L. and N.S.) Sebastes fasciatus Saint Lawrence, Gulf of. Sebastes fasciatus Laurentian Channel (N.L. and N.S.) Canada. Department of Fisheries and Oceans, issuing body. Maurice Lamontagne Institute, issuing body. Identification de deux espèces de sébastes, Sebastes mentella et S. fasciatus, dans les prises des pêches et des relevés par le nombre de rayons de la nageoire anale dans les unités 1 et 2 / (CaOODSP)9.908996 Canadian technical report of fisheries and aquatic sciences ; 3445. (CaOODSP)9.504449 PDF 2.63 MB https://publications.gc.ca/collections/collection_2022/mpo-dfo/Fs97-6-3445-eng.pdf