Funes-Rodríguez, R., R., Cervantes-Duarte, M.d.C., Jiménez-Quiroz, , Luis Ricardo Amaro-Sánchez, J., Gómez-Gutiérrez, S.d.C., Morales-Gutiérrez, J.R.F., Vallarta-Zárate, R., González-Armas, O., Zaitsev, B.S., Beltrán-León, C.A., Silva-Segundo* & S., Hernández-Trujillo (2024). Comparación de las asociaciones de larvas de peces y su relación con la variabilidad ambiental en la zona de surgencia costera frente a Bahía Magdalena, BCS (octubre 2011 y noviembre 2021). R.I., Rojas-González, J.R.F., Vallarta-Zárate, J.E., Osuna-Soto & E.V., Pérez-Flores (Eds.), Instituto Mexicano de Investigación en Pesca y Acuacultura Sustentables (Ed.), Exploración científica en territorio mexicano a bordo del Buque de Investigación Dr. Jorge Carranza Fraser: 10 años generando conocimiento de nuestros mares y sus recursos pesqueros. Cap. 3, pp.51-76. URL.
René Funes-Rodríguez 1, Rafael Cervantes-Duarte 2, María del Carmen Jiménez-Quiroz 3, Luis Ricardo Amaro-Sánchez 2, Jaime Gómez-Gutiérrez 1, Selene del Carmen Morales-Gutiérrez 3, Juan Roberto Felipe Vallarta-Zárate 3, Rogelio González-Armas 1, Oleg Zaitsev 2, Beatriz Susana Beltrán-León 4, Claudia Alicia Silva-Segundo* 5 y Sergio Hernández-Trujillo 1
Fish larvae were analyzed to identify their level of variation in composition and assemblages in relation to the environment off Bahía Magdalena, Baja California Sur, México, during autumn 2011 and 2021, in coincidence with periods of strong to moderate La Niña events in the Pacific. The assemblage’s response will be inferred by temperature, salinity, dissolved O2 and chlorophyll-a, in addition to temperature anomalies and coastal upwelling. A total of 106 species, included in 76 genera and 53 families, were identified on both cruises. Demersal species were the most diverse (29 taxa autumn 2011 and 32 in 2021), followed by reef–associated species (20 and 14 taxa, respectively) and in a smaller number of species which adults are from mesopelagic, epipelagic, coastal pelagic, and benthopelagic (< 11 taxa) habitats. Tropical and subtropical species were predominant in each cruise (> 50 taxa), while taxa of temperate affinity were scarce (< 8 taxa). The highest abundances in autumn 2011 were for Vinciguerria lucetia (> 31.1%), Bregmaceros bathymaster and Benthosema panamense (with similar relative abundances 17.2 and 16.1%, respectively), while in autumn 2021, B. bathymaster (24.24%) and Prionothus ruscarius (12.5%) were the numerically dominant taxa. Species assemblages in autumn 2011 were characterized by mesopelagic species, related to the increase in temperature, salinity and chlorophyll-a. Conversely, in 2021 by demersal taxa correlated positively with O2 concentrations nd the presence of the California Current off the bay. Among the main effects that modulated the associations of fish larvae off the bay were the narrow shelf, and the influence of the warm (coastal countercurrent) and cold currents (California Current) that favored change in abundance of species and the mixture from different habitat and biogeographic affinities, during La Niña cooling events.
Palabras clave: Fish larvae; assemblages, Baja; California peninsula, California Current
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