00000nam 2200000za 4500 9.805973 CaOODSP 20250317143327 cr ||||||||||| 150406s2000 oncd ob f000 0 eng d CaOODSP eng eng fre n-cn--- Fs70-1/2000-093E-PDF Beacham, Terry D. (Terry Dale), 1952- Origins of two recruitment pulses of 0-group Atlantic cod (Gadus morhua) in Bonavista Bay, Newfoundland during 1999, determined from genetic variation [electronic resource] / Terry D. Beacham, Robert S. Gregory, and John Brattey. Ottawa : Fisheries and Oceans Canada, 2000. 10 p. : fig., graphs, tables. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 2000/093 Includes bibliographical references (p. 7-8). Recruitment of 0-group Atlantic cod to the nearshore of coastal Newfoundland occurs in two or more pulses. The two largest of these recruitment pulses occur in August and in late September to October. The origin of these two recruitment pulses appearing in Newman Sound (Bonavista Bay), Newfoundland was investigated using genetic variation. Variation at seven microsatellite loci and the synaptophysin locus (Sypl) was examined in a sample of 200 0-group cod from each pulse collected by seine during August 16-18 and October 12-13, 1999. Genetic variation within pulses was compared with that of four offshore and five inshore populations of adult cod. For both pulses, variation was most similar to locally spawning adults from within Bonavista Bay in over 50% of 0-group cod. Of those individuals most similar to adults outside Bonavista Bay, the majority were most closely related to those collected north of the bay. Comparatively few 0-group were most similar to aggregations of adults sampled to the south, and then only in 0-group sampled in October. Offshore populations were estimated to contribute 49% of the August pulse, but only 30% of the October pulse. gccst Fisheries resources gccst Salt water fish gccst Fishing area gccst Fisheries management Gregory, Robert S. Brattey, J. (John) Canada. Department of Fisheries and Oceans. Canada. Canadian Stock Assessment Secretariat. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 2000/093 (CaOODSP)9.507740 PDF 72 KB https://publications.gc.ca/collections/collection_2015/mpo-dfo/Fs70-1-2000-093-eng.pdf