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Resumen del producto

Thompson, A.R., B., Broitman, D., Chargualaf, R., Garcia Gomez, C., Hinchliffe, W., Fennie, T., Frawley, G., Kwan, E., Mason, G., Aceves Medina, S.P.A., Jiménez Rosenberg, D., Sax, R., Seary & W., Watson (2023). Biogeography in the California Current Ecosystem from a Larval Fish Perspective. 46th Annual Larval Fish Conference. Lisboa, Portugal, mayo 7 - 11, 2023, 74.

Biogeography in the California Current Ecosystem from a Larval Fish Perspective

Andrew Richard Thompson 1, Bernardo Broitman 2, Dereka Chargualaf 3, Ruben Garcia Gomez 4, Charles Hinchliffe 3, Will Fennie 3, Tim Frawley 3, Garfield Kwan 5, Erica Mason 6, Gerardo Aceves Medina 4, Sylvia Patricia Adelheid Jiménez Rosenberg 4, Dov Sax 7, Rachel Seary 3 y William Watson 3

1 NOAA, Southwest Fisheries Science Center, Fisheries Resources Division, San Diego, USA
2 Facultad de Artes Liberales, Universidad Adolfo Ibáñez, Viña del Mar, Chile
3 NOAA - Southwest Fisheries Science Center, San Diego, USA
4 Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional - Centro Interdisciplinario de Ciencias Marinas, La Paz, Mexico
5 University of California, Davis, USA
6 University of California, San Diego, Scripps Institution of Oceanography (SIO), San Diego, USA
7 Brown University, Providence, Rhode Island, United States of America

Geographic features such as headlines, bathymetric features, and riverine input can create abrupt changes in ocean habitat characteristics. Depending on the life history of a marine species, geographical barriers can influence assemblage structure and patterns of diversity. In the California Current Ecosystem (CCE), which spans the coast of North America between Vancouver Island, Canada and Baja California, Mexico, multiple locations such as Point Conception and Punta Eugenia have previously been identified as geographic breaks for multiple marine species and populations. We explored spatial changes in the structure and diversity (number of species) of benthic versus pelagic fish assemblages at different geographic breaks by analyzing data of larvae systematically sampled across ~3000 km of the CCE during 2006 and 2008. For benthic fishes, distinct assemblages were found off two areas: Vancouver Island and Baja California. For pelagic fishes, distinct assemblages were found off five regions: Vancouver Island, Washington State to Point Conception, off southern California, off northern Baja California, and off southern Baja California. Latitudinal patterns in diversity also differed between benthic and pelagic species. The highest diversity for benthic fish was off Vancouver Island and there was no latitudinal trend throughout the rest of the CCE. For pelagic species, diversity increased equatorward from Vancouver Island to Cape Mendocino in northern California, remained stable between Cape Mendocino and Point Conception and then increased through southern Baja California. Results highlight the heterogeneity of marine life in the CCE and can help guide establishment of biologically-relevant conservation units.

Palabras clave: Fish larvae; California Current, CalCOFI, IMECOCAL

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