TY - JOUR
T1 - Morphometric variation of wild trout populations from northwestern Mexico (Pisces: Salmonidae)
AU - Ruiz-Campos, Gorgonio
AU - Camarena-Rosales, Faustino
AU - Varela-Romero, Alejandro
AU - Sánchez-Gonzáles, Sergio
AU - De La Rosa-Vélez, Jorge
N1 - Funding Information:
Numerous people participated in the sampling and are greatly acknowledged. Our special thanks go to the field guides B. Félix, I. García and F. García (Mesa de Tres Ríos, Sonora), S. Camuñez, A. Paredes and J. Navarro (Basaseachic, Chihuahua), L. Saavedra and J. Escárcega (Guadalupe y Calvo, Chihuahua), L.A. Ríos (El Salto, Durango), I. Rodríguez and A. Aguilar (San Miguel de Cruces, Durango). D.A. Hendrickson and B. Jensen provided information on trout collecting sites in the SMO. M. Grijalva gave logistical support for temporal storage of frozen specimens in his lab. N. Villarreal, J. Echánove, C. Brum, U. Pacheco, A. Jullian, F. León and J. Zamudio helped with the field work in the SSPM. M.E. Valles and C.A. Reyes for helping in the processing of specimens for morphometric analysis. Finally, we thank E. (Phil) Pister, R.L. Mayden, J.L. Nielsen, Brigitte Gavio and two anonymous reviewers for their helpful comments on the manuscript. This study was funded by the Consejo Nacional de Ciencia y Tecnología (grant: CONACYT 33528-V ). The collecting permit for trout specimens was provided by Secretaría de Agricultura, Ganadería, Desarrollo Rural, Pesca y Alimentación (number of permit 060201-613-03).
PY - 2003
Y1 - 2003
N2 - 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.
AB - 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.
KW - Morphometrics
KW - Northwestern Mexico
KW - Oncorhynchus
KW - Variation
KW - Wild trout
UR - http://www.scopus.com/inward/record.url?scp=0346965534&partnerID=8YFLogxK
U2 - 10.1023/A:1026367113735
DO - 10.1023/A:1026367113735
M3 - Artículo
SN - 0960-3166
VL - 13
SP - 91
EP - 110
JO - Reviews in Fish Biology and Fisheries
JF - Reviews in Fish Biology and Fisheries
IS - 1
ER -