Localized and nonadditive effects of temperature and population abundabce on the spatial distribution of arrowtooth flounder (Atheresthes stomias) in the eastern Bering Sea ...

• Main Authors: Ciannelli, Lorenzo, Bartolino, Valerio, Chan, Kung-Sik
• Format: Conference Object
• Language: unknown
• Published: ASC 2010 - Theme session G 2024
• Subjects: Technologies and data; Ecosystem observation, processes and dynamics; Bering Sea
• Online Access: https://dx.doi.org/10.17895/ices.pub.25069745; https://ices-library.figshare.com/articles/conference_contribution/Localized_and_nonadditive_effects_of_temperature_and_population_abundabce_on_the_spatial_distribution_of_arrowtooth_flounder_Atheresthes_stomias_in_the_eastern_Bering_Sea/25069745

No abstracts are to be cited without prior reference to the author.We examine the local and interactive effects of both density-independent (bottom temperature) and density-dependent (population size) sources of variability on arrowtooth flounder (ATF) spatial distribution in the eastern Bering Sea. We develop a generalized additive model formulation with spatially variable coefficients to capture the local effects of water temperature and global population abundance and their interaction. Results indicate that ATF avoids water colder than ca. 2°C, limiting its distribution to mostly the outer shelf of the Bering Sea. We also found that ATF habitat expands during periods of high population abundance. These results are in agreement with previous analysis. However, we enrich these previous results by locally characterizing the effects of temperature and population abundance and by quantifying their statistical interactions. We found that the density-dependent habitat expansion is not homogeneous and occurs in ...