Diversidad de peces del río Buena Vista (Manabí-Ecuador)
Fecha
2018
Autores
Título de la revista
ISSN de la revista
Título del volumen
Editor
Facultad de Ciencias Naturales. Universidad de Guayaquil
Resumen
El presente estudio tuvo como objetivo, determinar la diversidad íctica en el río Buena Vista, ubicado en la región costa del Ecuador al suroeste de la provincia de Manabí. Se registraron un total de 8 especies, distribuidas en 3 órdenes, 6 familias y 7 géneros. El orden más diverso fue Perciformes con 5 especies, la especie más abundante fue Andinoacara rivulatus, con 485 individuos, es decir, 41,7% de total de peces colectados. La especie menos abundante fue Gobiomorus maculatus con 58 individuos correspondiente al 4,99% de peces recolectados.
La abundancia de peces fue mayor entre los puntos 5 y 14, debido a una mayor cobertura vegetal, presencia de vegetación acuática y variedad de hábitats. Los índices de Margalef, Simpson y Shannon-Wiener determinaron que la diversidad en el río Buena Vista es baja, posiblemente por efecto de la estación seca, así como de acciones antropogénicas que deterioran la calidad del agua del río, lo cual es notorio a medida que el cauce del río se acerca a la costa. Se determinó que la salinidad fue un limitante en la distribución de especies estenohalinas como Andinoacara rivulatus, Lebiasina bimaculata, Lebiasina aureoguttata, y Pseudopoecilia fria.
The objective of this study was determine the diversity of fishes, in Buena Vista river located in the southwest of Manabí province, coast region of Ecuador. 8 species distributed in 3 orders 6 families and 7 genuses were recorded. The most diverse order was Perciformes with 5 species. The most abundant species was Andinoacara rivulatus with 485 individuals equivalent to 41.7% of total. The least abundant species was Gobiomorus maculatus with 58 individuals equivalent to 4.99% of all the studied fishes. The abundance of fishes were higher between points 5 and 14, due to increased plant coverage, presence of aquatic vegetation and variety of habitats. The rates of Margalef, Simpson and Shannon-Wiener determined the diversity in Buena Vista River is low. Probably because the effect of the dry season, and the anthropogenic actions make the water quality of the river decay. That is notorious when the channel of the river approaches to the coast. This study determined salinity was a limiting in the distribution of stenohaline species like Aandinoacara rivulatus, Lebiasina bimaculata, Lebiasina aureoguttata, y Pseudopoecilia. fria.
The objective of this study was determine the diversity of fishes, in Buena Vista river located in the southwest of Manabí province, coast region of Ecuador. 8 species distributed in 3 orders 6 families and 7 genuses were recorded. The most diverse order was Perciformes with 5 species. The most abundant species was Andinoacara rivulatus with 485 individuals equivalent to 41.7% of total. The least abundant species was Gobiomorus maculatus with 58 individuals equivalent to 4.99% of all the studied fishes. The abundance of fishes were higher between points 5 and 14, due to increased plant coverage, presence of aquatic vegetation and variety of habitats. The rates of Margalef, Simpson and Shannon-Wiener determined the diversity in Buena Vista River is low. Probably because the effect of the dry season, and the anthropogenic actions make the water quality of the river decay. That is notorious when the channel of the river approaches to the coast. This study determined salinity was a limiting in the distribution of stenohaline species like Aandinoacara rivulatus, Lebiasina bimaculata, Lebiasina aureoguttata, y Pseudopoecilia. fria.
Descripción
pdf
Palabras clave
ABUNDANCIA, ACCIONES ANTROPOGÉNICAS, DIVERSIDAD