Variation In The Biogeography Of Gulf Of Alaska Micionekton As A Driving Mechanism For Observed Growth Trends In Pacific Salmon ...

• Main Author: Aydin, Kerim Y.
• Format: Conference Object
• Language: unknown
• Published: ASC 2000 - Y - Theme session 2024
• Subjects: Fisheries and aquaculture; Oceanic Northeast Atlantic ICES Ecoregion; Gulf of Alaska; Pacific; Northeast Atlantic; Alaska
• Online Access: https://dx.doi.org/10.17895/ices.pub.25637067; https://ices-library.figshare.com/articles/conference_contribution/Variation_In_The_Biogeography_Of_Gulf_Of_Alaska_Micionekton_As_A_Driving_Mechanism_For_Observed_Growth_Trends_In_Pacific_Salmon/25637067

No abstracts are to be cited without prior reference to the author.The adult body lengths and weights of many Pacific salmon stocks (Oncorhynchus spp.) are negatively correlated with sea surface temperature in the northeastern Pacific Ocean. The mechanisms behind the correlation may be due to (1) a physiological response of salmon to warming surface waters; or (2) shifts in the abundance or composition of prey species. Determining the relative importance of each mechanism is critical to predicting the effect of climate change on salmon populations. In this study, I summarize empirical studies of oceanographic conditions, salmon food habits, and salmon growth in the Gulf of Alaska during the 1950s, 1980s and 1990s. I use bioenergetics models to determine the variation in the factors determining salmon growth. In particular, I show a relationship between oceanographic boundaries, the southern limit of salmon distribution, and the northern limit of a micronektonic squid species (Berryteuthis anonychus), a ...