Individual-based modeling of feeding ecology and prey selection of larval cod on Georges Bank ...

• Main Authors: Kristiansen, Trond, Werner, Francisco E., Lough, R. Gregory, Buckley, Larry J., Broughton, Elisabeth A.
• Format: Text
• Language: English
• Published: The University of North Carolina at Chapel Hill University Libraries 2009
• Subjects: Gadus morhua
• Online Access: https://dx.doi.org/10.17615/67yn-vv15; https://cdr.lib.unc.edu/concern/articles/fq978361h

Understanding larval fish survival dynamics is essential to determining variability in future adult population structure. Realistic modeling of larval fish feeding ecology depends on incorporating both the biotic and abiotic conditions that affect predator–prey interactions. We used an individual-based model (IBM) to test which variables drive Atlantic larval cod Gadus morhua feeding preferences. The IBM included a bioenergetics component that incorporated metabolic parameters and growth and a mechanistic prey selection component that depended on larval development and behavior, prey size and behavior, depth, light, and physical oceanographic conditions. We applied our model to Georges Bank and incorporated high-resolution field data on environmental conditions and prey abundance to analyze larval cod feeding ecology. Based on simulated selectivity indices, we found that cod prey selection was determined by differential encounter of prey due to the abundance of suitably sized prey, their visibility, and ...