Larval behavior regulates nearshore retention and offshore migration in an upwelling shadow and along the open coast

摘要: ABSTRACT: Larvae are considered to be highly susceptible offshore transport, thereby limitingrecruitment in productive upwelling regions, except the recirculation features that form leeof headlands. We show 19 of 20 taxa nearshore crustaceans were at least as common on theopen coast they lee a headland recruitment-limited region characterized bystrong upwelling. Nine these occurred high concentrations throughout development, indi-cating larvae completed development coastal boundary layer reduced Ekmantransport. 9 more prevalent early stage larvae, and later stages uncom-mon, indicating migrated offshore. The relative abundance larval largelymatched vertical distributions this study previous cross-shelf survey site,indicating behavior plays substantial role determining whether completedevelopment or migrate development. occurrednearshore resided below shallow Ekman ofseaward-flowing surface waters, whereas most other closer surface.Whether undertook ontogenetic diel migrations also appeared determinewhether retained nearshore. Thus retention may widespread upwellingregions than is widely believed, cause recruitment limitation along coasts needsto determined further advance our understanding connectivity, dynamics structure ofcoastal populations.KEY WORDS: Larval · transport Recruitment Upwelling Populationdynamics Community