Morphometric variation of wild trout populations from northwestern Mexico (Pisces: Salmonidae)

Gorgonio Ruiz-Campos*, Faustino Camarena-Rosales, Alejandro Varela-Romero, Sergio Sánchez-Gonzáles, Jorge De La Rosa-Vélez

*Autor correspondiente de este trabajo

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

32 Citas (Scopus)


Morphometric variation of 17 wild trout populations of the genus Oncorhynchus from northwestern Mexico was analyzed. We used 25 standardized morphometric characters following a box truss protocol. In the discriminant function analysis (DFA) of the examined specimens (n = 214), grouped by drainage, the canonical root 1 explained 88.1 % of the total variation. Sixteen linear characters allow distinguishing O. mykiss nelsoni (Sierra San Pedro Mártir [SSPM]) from O. chrysogaster and O. mykiss sspp. (Sierra Madre Occidental [SMO]). Two distinctive groups of populations were recognized on the basis of the squared Mahalanobis' distances, one for the SSPM (O. m. nelsoni) and the other for the SMO. The latter group is divided into four subgroups: (1) O. chrysogaster (Río Fuerte and Río Culiacán) and O. mykiss ssp. (Río Piaxtla); (2) O. mykiss sspp. (Río San Lorenzo, Río Baluarte, and Río Acaponeta); (3) O. mykiss sspp. (Río Yaqui and Río Mayo); and (4) O. chrysogaster (Río Sinaloa). In the DFA among populations within each taxon, the canonical variable 1 accounted for 41.8% of the total variation for O. m. nelsoni, 59.4% for O. chrysogaster, and 43.8% for O. m. sspp.

Idioma originalInglés
Páginas (desde-hasta)91-110
Número de páginas20
PublicaciónReviews in Fish Biology and Fisheries
EstadoPublicada - 2003


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