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Patterns in the species diversity and composition of the fish community of the Lacanja River, Chiapas, Mexico

Tipo de material: Artículo impreso(a) Artículo impreso(a) Idioma: Inglés Tema(s) en español: Tema(s) en inglés: Clasificación:
  • AR/597.097275 R6
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  • Disponible en línea
 En: Journal of Freshwater Ecology volumen 14, número 4 (December 1999), páginas 456-468Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso Resumen:
Inglés

The Lacanja River, a tropical rain forest river in southern Mexico, remains relatively undegraded and serves as a good reference for comparison with other rivers in the region that are experiencing human impacts. We sampled 12 sites from the headwaters to the mouth of the river (120 km) in both the wet and dry seasons to quantify longitudinal and seasonal patterns in fish community diversity and composition. We collected 44 species (41 native) from the river, with Cichlidae the most speciose family. The most widespread and abundant species were Brycon guatemalensis, Astyanaxsp. (both Characidae), and Cichlasoma intermedium (Cichlidae). Based on fish species composition, the river could be divided into an upper, middle, and lower zone; waterfalls impeded fish movements within and between these zones. The upper zone had the lowest species diversity, and the lower zone had the highest. All of the upper zone fishes also occurred in the lower zone, and community composition changed from upstream to downstream solely through species addition and without species replacement. Overall, species diversity was slightly higher in the dry season.

Número de sistema: 24456
Lista(s) en las que aparece este ítem: Producción Rocío Rodiles Hernández
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Artículos Biblioteca Electrónica Recursos en línea (RE) ECOSUR Recurso digital ECO400244562484
Artículos Biblioteca San Cristóbal Artículos (AR) ECOSUR AR 597.097275 R6 001 Disponible SER001291
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The Lacanja River, a tropical rain forest river in southern Mexico, remains relatively undegraded and serves as a good reference for comparison with other rivers in the region that are experiencing human impacts. We sampled 12 sites from the headwaters to the mouth of the river (120 km) in both the wet and dry seasons to quantify longitudinal and seasonal patterns in fish community diversity and composition. We collected 44 species (41 native) from the river, with Cichlidae the most speciose family. The most widespread and abundant species were Brycon guatemalensis, Astyanaxsp. (both Characidae), and Cichlasoma intermedium (Cichlidae). Based on fish species composition, the river could be divided into an upper, middle, and lower zone; waterfalls impeded fish movements within and between these zones. The upper zone had the lowest species diversity, and the lower zone had the highest. All of the upper zone fishes also occurred in the lower zone, and community composition changed from upstream to downstream solely through species addition and without species replacement. Overall, species diversity was slightly higher in the dry season. Inglés

Disponible en línea

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