Inter-Annual, Stock-Specific Distribution and Migration of Juvenile Sockeye Salmon (Oncorhynchus nerka) from 1997–2017

Abstract Excerpt:
Juvenile sockeye salmon have marine distributions and migration patterns that vary between stocks and may be influenced differently by changing ocean conditions and food supplies. Fisheries and Oceans Canada conducts juvenile salmon surveys to increase our understanding of Pacific salmon populations, migrations and distributions (Fig. 1). The focus of these surveys has expanded from abundance measures to include environmental conditions and Genetic Stock Identification (GSI, Beacham et al. 2014). Tissue was collected from juvenile sockeye salmon, Oncorhynchus nerka, from 6,179 surface tows from 1997–2017, primarily within coastal waters off British Columbia.