An individual-based model of the krill Euphausia pacifica in the California Current

摘要: Abstract Euphausia pacifica is an abundant and important prey resource for numerous predators of the California Current elsewhere in North Pacific. We developed individual-based model (IBM) E. to study its bioenergetics (growth, stage development, reproduction, mortality) under constant/ideal conditions as well varying ocean food resources. To conditions, we coupled IBM oceanographic-ecosystem over period 2000–2008 (9 years). Model results compare favorably with experimental studies conducted unlimited conditions. Under more realistic variable oceanographic mean growth rates continental shelf were positive only when individuals migrated diurnally depth maximum phytoplankton layer during nighttime feeding. Our used coastal lower than expected (0.01 mm d−1), suggesting that a diverse base (zooplankton, protists, marine snow) may be required facilitate survival modeled environment. This IBM–ROMS modeling framework parameters provides tool understanding biology ecology could further climatic effects on this key species enhance ecosystem approach fisheries wildlife management region.