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Marine Ecology Progress Series

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MEPS 520:123-141 (2015)  -  DOI:

Cephalopod paralarval assemblages in the Gulf of California during 2004-2007

Roxana De Silva-Dávila1,*, Carmen Franco-Gordo2, Frederick G. Hochberg3, Enrique Godínez-Domínguez2, Raymundo Avendaño-Ibarra1, Jaime Gómez-Gutiérrez1, Carlos J. Robinson4

1Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Departamento de Plancton y Ecología Marina, Av. IPN s/n, Fracc. Playa Palo de Sta. Rita, La Paz, Baja California Sur 23096, Mexico
2Universidad de Guadalajara, Centro de Ecología Costera, Av. Gómez Farías 82, San Patricio Melaque, Jalisco 48980, Mexico
3Department of Invertebrate Zoology, Santa Barbara Museum of Natural History, 2559 Puesta del Sol, Santa Barbara, California 93105, USA
4Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, Distrito Federal 04500, Mexico
*Corresponding author:

ABSTRACT: The responses of cephalopod paralarvae to environmental and hydrodynamic variability were analyzed using data collected during 8 oceanographic cruises (2004-2007) carried out in the entire Gulf of California. Redundancy analysis showed that temperature and salinity at 10 m depth (on the first axis), and zooplankton volumes and chlorophyll a concentration (on the second axis) were the main environmental variables influencing paralarval abundance. Relatively high correlations with the first axis were found in paralarvae of Pterygioteuthis hoylei (-0.5126), in the SD complex (Sthenoteuthis oualaniensis and Dosidicus gigas, 0.4526), and in Gonatus pyros (-0.3350). We observed 3 recurrent cephalopod paralarval assemblages related to the seasonal flux of water masses. The Gulf and Shallow assemblages were distributed mostly in Gulf of California water (salinity ≥35.0) located in the most productive environment. The Tropical assemblage was distributed in tropical surface water, associated with high temperatures and a less productive environment. During the spring, species richness and diversity in the assemblages were high in response to northward advection of tropical surface water into the gulf. The lowest richness values were recorded during summer, associated with the southward flow of Gulf of California water, and the highest temperatures of the year. The assemblages included mostly pelagic, tropical-subtropical taxa and few temperate and cosmopolitan taxa. Paralarval abundance in the gulf was numerically dominated by a few species, but each assemblage had a significantly different community structure and seasonal latitudinal boundaries, suggesting assemblages can be used as biological indicators of the distribution of water masses in the gulf.

KEY WORDS: Cephalopod · Paralarval assemblages · ENSO · Gulf of California

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Cite this article as: De Silva-Dávila R, Franco-Gordo C, Hochberg FG, Godínez-Domínguez E, Avendaño-Ibarra R, Gómez-Gutiérrez J, Robinson CJ (2015) Cephalopod paralarval assemblages in the Gulf of California during 2004-2007. Mar Ecol Prog Ser 520:123-141.

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