Environmental forcing of life history strategies: Multi-trophic level response at ocean basin scales ...

• Main Authors: Suryan, Robert M., Frederiksen, Morten, Wanless, Sarah
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: ASC 2007 - Theme session D 2024
• Subjects: Ecosystem observation, processes and dynamics; North Atlantic
• Online Access: https://dx.doi.org/10.17895/ices.pub.25257637.v2; https://ices-library.figshare.com/articles/conference_contribution/Trophic_structure_of_the_Barents_Sea_fish_community_with_the_special_reference_to_the_cod_stock_recovery_ability/25257637/2

No abstracts are to be cited without prior reference to the author.Variation in life history traits of organisms is thought to reflect adaptations to environmental forcing occurring from bottom-up and top-down processes. Such variation occurs not only among, but also within species, indicating demographic plasticity in response to environmental conditions. Between North Atlantic and North Pacific Ocean basins, intraspecific variation in life history traits has been observed among trophic levels from zooplankton to sharks, seabirds, and sea turtles. In all cases examined, species in the Eastern Pacific exhibited later maturation and lower fecundity, but greater annual survival, than conspecifics in the Atlantic. We hypothesize that this dichotomy results from frequency and amplitude shifts in resource availability over varying temporal and spatial scales. Captive studies of fishes have shown that differences in growth and age of reproduction can indeed be a function of environmental control rather than ...