Composición taxonómica y relaciones zoogeográficas de los peces demersales de la costa occidental de Baja California Sur, México

Abstract

Taxonomic composition and zoogeographic relations of demersal in the western coast of Baja California Sur, Mexico. The composition of demersal fish along the western coast of the State of Baja California Sur, México, including the limit of the northern distribution of the ichthyofauna of the eastern tropical Pacific, is presented. The survey was carried out on four oceanographic cruises between autumn 2004 and March 2006. Of 220 species in 132 genera and 73 families, 26.3% are species of wide distribution from San Diego County, USA to Panama and 21.7% are species restricted to the eastern tropical Pacific. Six species are new findings for the area or range expansions. The families with the most species are Paralichthyidae and Scorpaenidae, each with 16 species. The most frequent genus was Sebastes, with nine species. We present a table with common Spanish names, size range and status of each species inside the community.

Patterns of distribution, temporal fluctuations and some population parameters of four species of flatfish

“…Hornyhead turbot migrated into deeper waters during the El Niño event of 1987-1988(Allen, 2008. Rodríguez-Romero et al (2008) consider this species as very common in the west coast of Baja California, with sizes ranging between 81 and 256 mm SL. In San Quintin Bay, Rosales-Casián (1996) reported sizes between 60 and 140 mm.…”

“…Few studies have been reported on Baja California Pleuronectidae, providing general information on the zoogeography Eschmeyer, 1998;Rodríguez-Romero et al, 2008) and distribution (Kramer, 1991;Rosales-Casián, 1996;Rábago-Quiroz et al, 2008).…”

Composición taxonómica y aspectos zoogeográficos de peces de profundidad (90-540m) del Golfo de California, México.

“…Los estatus taxonómicos en peces con un enfoque de composición, ubicación, caracterización y zoogeografía son fundamentales para desarrollar cualquier tema de biodiversidad y manejo pesquero (Aguilar-Palomino et al 1996;Rodríguez-Romero et al 2008). Este estudio aporta información al conocimiento de la fauna íctica demersal de zonas profundas (90 a 540m) de la región oriental del Golfo de California.…”

“…El análi-sis de afinidad zoogeográfica fue determinada de acuerdo con el esquema básico de Briggs (1974de Briggs ( , 1995, con modificaciones de Boschi (2000), Galván et al (2000), Hastings (2000), Robertson & Allen (2002), Robertson et al (2004) Nelson et al (2004), Love et al (2005), Rodríguez Romero et al 2008. Se presenta el nivel trófico, afinidad biogeográfica y las tallas máximas conocidas para las especies.…”

Distribution of the deep-sea genus Bathypterois (Pisces: Ipnopidae) in the Eastern Central Pacific

“…The Mexican Pacific comprises three mayor regions: The West coast of the Baja California peninsula (BC), a transitional zone in faunal composition and environmental conditions (Rodríguez-Romero, Palacios-Salgado, López-Martínez, Hernández-Vázquez, & Ponce-Díaz, 2008), influenced by the California Current, the subsurface California Countercurrent and the North Equatorial current (OMZ: 300 -1 800 m depth) (Levin, 2003;Fiedler & Talley, 2006). The Gulf of California (GC) is a semi-closed sea, with strong processes of horizontal transport and vertical mixing of water in its Northern part (Palacios-Hernández, Beier, Lavín, & Ripa, 2002), while in its central and southernmost portions, the OMZ is located between 250 and 1 400 m depth, and between 70 and 1 300 m depth, respectively, with a hypoxic-anoxic zone (150-700 m depth), being an impenetrable barrier for some species (Zamorano et al, 2006;Mendez, 2007;Hendrickx & Serrano, 2010).…”