%0 Journal Article
%T The genus Basilichthys (Teleostei: Atherinopsidae) revisited along its Chilean distribution range (21∼ to 40∼ S) using variation in morphologyand mtDNA El g谷nero Basilichthys (Teleostei: Atherinopsidae) analizado a lo largo de su distribuci車n en Chile (21∼ a 40∼ S), utilizando rasgos morfol車gicos y variabilidad del ADN mitocondrial
%A DAVID V谷LIZ
%A LAURA CATAL芍N
%A RODRIGO PARDO
%A PATRICIO ACUˋA
%J Revista chilena de historia natural
%D 2012
%I Springer
%X There is still doubt as to the number of species of the freshwater Chilean ichthyofauna, 64 % of which have conservation problems. One of the groups is that of the silversides of the genus Basilichthys. Three morphological species of this genus have been described in Chile with disjoint distributions: Basilichthys semotilus, B. microlepidotus and B. australis; the latter two overlap in distribution only in the Aconcagua River and are not easily distinguishable by morphological and meristic characters. In order to evaluate the efficacy of identification of these species by molecular techniques, we analyzed the sequence of 9 % of the mitochondrial DNA (Control Region and COI) of individuals from the Loa River (21∼41' S) to the Valdivia River (39∼50' S), adding meristic features for B. microlepidotus and B. australis in order to study population variation to clarify the taxonomy of the native species of the genus. The phylogenetic analysis showed that the individuals of Basilichthys semotilus form an haplogroup separated from the other species of the genus; however, B. australis and B. microlepidotus form a monophyletic group that shares the most common haplotypes. An analysis of meristic information showed no statistically significant differences in the number of lateral line scales or number of rays in the fins between B. microlepidotus and B. australis. These results do not support the current classification for the latter two species; there appears to be one group in the extreme north of the country (Basilichthys semotilus) and a second group in central Chile which should be called B. microlepidotus. This information will be useful to review the conservation status of the Chilean fauna. Si bien a迆n existen dudas sobre el n迆mero de especies descritas en el pa赤s, se reconoce que el 64 % de la ictiofauna dulceacu赤cola chilena se encuentra en alguna categor赤a de peligro de conservaci車n. Uno de los grupos categorizados como vulnerable y en peligro de extinci車n es el de los pejerreyes del g谷nero Basilichthys. A lo largo Chile, este g谷nero posee tres especies morfol車gicas con distribuci車n disjunta: Basilichthys semotilus, B. microlepidotus y B. australis. Las dos 迆ltimas sobreponen su distribuci車n en el r赤o Aconcagua y no son f芍cilmente diferenciables morfol車gicamente. Para evaluar la eficacia en la identificaci車n de estas especies al utilizar marcadores moleculares, se analiz車 el 9 % del ADN mitocondrial (Regi車n Control y COI) de organismos obtenidos desde el r赤o Loa (21∼41' S) al r赤o Valdivia (39∼50' S) y adicionando un an芍lisis mer赤stico en organismos pert
%K COI
%K cuencas hidrogr芍ficas
%K mtDNA
%K pejerreyes
%K Regi車n Control
%K COI
%K Control Region
%K drainages
%K mtDNA
%K Silverside fish
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000100004