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| García-Machado, E.; Chevalier, P.; Solignac, M.. |
| The hamlets are a group of vividly colored fish species of the Serranidae family differentiated only by the color pattern of the body. Although there are divergent views about hamlet taxonomy, experimental and field observations have shown a strong assortative mating, justifying a species status for the different color morphs. Here we analyze the level of evolutionary divergence among six species in respect of mitochondrial DNA, with a view to contrasting the pattern observed with color partitions and previous results obtained with isozymes. The estimated molecular distance among species was low and of the same magnitude as nucleotide diversity within species. Consequently, the net distance and hence the time of divergence between taxa was virtually zero... |
| Tipo: Journal Contribution |
Palavras-chave: MtDNA; Marine fish; Genetic diversity. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/4569 |
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| Hernández Martínez, D.; Álvarez-Alemán, A.; Bonde, R. K.; Powell, J.A.; García-Machado, E.. |
| El objetivo del presente trabajo fue obtener información preliminar acerca de la composición de haplotipos del ADN mitocóndrico (ADNmt) del manatí (Trichechus manatus) que habita en el archipiélago cubano. Se analizó un total de 13 individuos, 12 de Cuba y uno procedente de la Florida, EU. Las secuencias de un fragmento de 410 pb de la región de control del ADNmt (D-loop) permitieron identificar dos haplotipos. El haplotipo A1, único encontrado en la Florida (incluida la muestra aquí analizada), pero también presente en México, Puerto Rico y República Dominicana. Este haplotipo fue mayoritario (11 de los 12 individuos muestreados en Cuba). El segundo haplotipo fue el A3, referido anteriormente como endémico de Belice, se encontró en un individuo... |
| Tipo: Journal Contribution |
Palavras-chave: Genetic diversity; MtDNA. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5252 |
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| García-Machado, E.; Hernández, D.; García-Debrás, A.; Chevalier-Monteagudo, P.; Metcalfe, C.; Bernatchez, L.; Casane, D.. |
| Underground environments are increasingly recognized as reservoirs of faunal diversity. Extreme environmental conditions and limited dispersal ability of underground organisms have been acknowledged as important factors promoting divergence between species and conspecific populations. However, in many instances, there is no correlation between genetic divergence and morphological differentiation. Lucifuga Poey is a stygobiotic fish genus that lives in Cuban and Bahamian caves. In Cuba, it offers a unique opportunity to study the influence of habitat fragmentation on the genetic divergence of stygobiotic species and populations. The genus includes four species and one morphological variant that have contrasting geographical distributions. In this study, we... |
| Tipo: Journal Contribution |
Palavras-chave: Fish; Phylogeny. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4138 |
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