Long-term seasonal and spatial patterns in mortality and survival of Calanus finmarchicus across the Atlantic Zone Monitoring Program region, Northwest Atlantic ...

• Main Authors: Plourde, Stéphane, Pepin, Pierre, Head, Erica
• Format: Conference Object
• Language: unknown
• Published: ASC 2009 - Open session 2024
• Subjects: Fisheries and aquaculture; Pressures, impacts, conservation, and management; Calanus finmarchicus; Newfoundland; Northwest Atlantic
• Online Access: https://dx.doi.org/10.17895/ices.pub.25074557.v1; https://ices-library.figshare.com/articles/conference_contribution/Long-term_seasonal_and_spatial_patterns_in_mortality_and_survival_of_Calanus_finmarchicus_across_the_Atlantic_Zone_Monitoring_Program_region_Northwest_Atlantic/25074557/1

No abstracts are to be cited without prior reference to the author.The Vertical Life Table method was used to estimate stage-specific daily mortality rates and survival from 1999 to 2006 for Calanus finmarchicus sampled in the Canadian Atlantic Zonal Monitoring Program (AZMP), which covers the Newfoundland Shelf (NLS), Gulf of St. Lawrence (GLS) and Scotian Shelf (SS). Stage-specific mortality rates and survival showed significant regional and seasonal differences with the largest signal associated with variations in temperature. Densitydependent mortality, associated with the abundance of C6 females, was the predominant factor affecting mortality in the egg-C1 transition during the period of population growth in spring on the SS and in summer in the GSL and on the NLS. In autumn, mortality in egg-C1 was positively related to temperature and negatively related to phytoplankton biomass, with particularly high mortality rates occurring on the SS. The integration of our results into stage-specific recruitment ...