SciELO - Scientific Electronic Library Online

 
vol.44 número1Inclusión de aceite de soya y su relación con la calidad del crecimiento y aceptabilidad de los filetes del bagre plateado (Rhamdia quelen)Reemplazo parcial de la harina de pescado con harina de carne y hueso, y harina de subproductos de atún en dietas para juveniles de pargo lunarejo Lutjanus guttatus índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

  • En proceso de indezaciónCitado por Google
  • No hay articulos similaresSimilares en SciELO
  • En proceso de indezaciónSimilares en Google

Compartir


Latin american journal of aquatic research

versión On-line ISSN 0718-560X

Resumen

DUARTE, Michelle; VENTURA, Carlos  y  SILVA, Edson. Genetic variation in color morphs of the endangered species, Paracentrotus gaimardi (Echinoidea: Echinidae). Lat. Am. J. Aquat. Res. [online]. 2016, vol.44, n.1, pp.46-55. ISSN 0718-560X.  http://dx.doi.org/10.3856/vol44-issue1-fulltext-5.

ABSTRACT. Paracentrotus gaimardi is a sea urchin reaching a maximum of 42 mm of diameter. It presents five morphotypes in sympatry characterized by their distinctive spine colors (e.g., green, black, gray, brown and rose). P. gaimardi is considered as a vulnerable species and it is included on the list of endangered species of the Brazilian coastline. In this work, allozyme electrophoresis was used to study the genetic variation among the five color morphotypes, from two different geographic locations along the coast of Rio de Janeiro State: Itaipu and Prainha, both in sympatry and allopatry. The underlying null hypothesis is that the different spine colors that define the morphotypes, represent only intraspecific variation of P. gaimardi. Eight polymorphic loci (Cat, a-Est-1, a-Est-2, Mdh, Pep, Pgi, Pgm and Xod) were assayed. Departures from Hardy-Weinberg equilibrium were tested at each locus in each morphotype from each locality. P. gaimardi species showed high levels of genetic variation (0.171-0.343) in accordance with the patterns observed for marine invertebrates. Diagnostic loci were not found among any of the five morphotypes and neither for the different geographic locations. A U-Mann Whitney test showed values significantly lower in sympatry than in allopatry for both Nei’s Geneti c Identities and 2 x 2 9 F-statistics. Furthermore, performance of AMOVA analysis considering hierarchical levels of individuals indicates that the differences in genetic variation are sorted among collection sites rather than color morphotypes.

Palabras clave : echinoderms; morphotypes; allozymes; genetic variation; biochemical systematic; endangered species.

        · resumen en Español     · texto en Inglés     · Inglés ( pdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons