Does spatial variation in environmental conditions affect recruitment? A study using a 3-D model of Peruvian anchovy

作者: Yi Xu , Kenneth A. Rose , Fei Chai , Francisco P. Chavez , Patricia Ayón

DOI: 10.1016/J.POCEAN.2015.04.002

关键词: FisheryPhytoplanktonAdvectionAnchovyLarvaEcologyPredationBiologyJuvenileZooplanktonSpatial variability

摘要: Abstract We used a 3-dimensional individual-based model (3-D IBM) of Peruvian anchovy to examine how spatial variation in environmental conditions affects larval and juvenile growth survival, recruitment. Temperature, velocity, phytoplankton zooplankton concentrations generated from coupled hydrodynamic Nutrients–Phytoplankton–Zooplankton–Detritus (NPZD) model, mapped three dimensional rectangular grid, were simulate populations. The IBM simulated individuals as they progressed eggs recruitment at 10 cm. Eggs yolk-sac larvae followed hourly through the processes development, mortality, movement (advection), juveniles daily growth, (advection plus behavior). A bioenergetics was grow juveniles. NPZD provided prey fields which influence both food consumption rate well behavior mediated with going grids cells having optimal conditions. compared predicted for monthly cohorts 1990 2004 between full 3-D point (0-D) that spatially-averaged 0-D versions similar interannual patterns 1991–2004, results yielding consistently higher survivorship. Both successfully captured very poor during 1997–1998 El Nino event. Higher simulations due survival stage resulting searching more favorable temperatures lead faster rates. strong effect temperature because saturating anchovies. conclude discussion explicit treatment affected recruitment, other examples fisheries modeling analyses have approach assess variation, areas further development.

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