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Populations of many nearshore marine species are connected through the dispersal of their larvae. In this paper, larval connectivity patterns in the Southern California Bight are explored using 2 quantities: potential and realized larval connectivity. Potential connectivity is defined as the probability of larval transport from a source to a destination location and is quantified using Lagrangian particle simulations. Realized connectivity is the product of potential connectivity with larval production and can be used to estimate larval settlement patterns. Potential and realized con- nectivity patterns are quantified for kelp bass Paralabrax clathratus, kelp rockfish Sebastes atro- virens, and red abalone Haliotis rufescens, 3 species with a range of larval dispersal characteristics. Connectivity patterns were found to be both heterogeneous, with locations having different source and destination strengths, and asymmetric, with directionality in larval transport. Both potential and realized connectivity were strongly influenced by the length and timing of the spawning season as well as planktonic larval duration. For kelp bass and kelp rockfish, a strong correspondence was found between realized and potential destination locations, suggesting that circulation processes have a dominant role in shaping the spatial distribution of these 2 species. Strong temporal variabil- ity in realized larval connectivity was observed on seasonal and inter-annual time scales (particularly between El Nino and La Nina conditions). These results provide novel information for use in marine fisheries and conservation management.

Realized and potential larval connectivity in the Southern California Bight