Freshwater fish and aquatic ecosystem conservation of the lower rio Dagua, Buenaventura, Valle del Cauca, Colombia
DOI:
https://doi.org/10.47366/sabia.v4n1a9Keywords:
Rainforest, Aquatic ecosystems, Fish, ConservationAbstract
The Dagua river basin, a scenario with multiple environmental impacts, is of great importance as a key area for the conservation of the biodiversity of freshwater fish from the Colombian Pacific, which is why this research aimed to develop a descriptive study of the river ecosystem of the Dagua River. and its ichthyofauna, in order to recognize the ecological attributes that provide sustainable management tools for these resources. The investigation was carried out in the high and middle Dagua community council lands (CCAMDA), which is located in the middle and lower part of the Dagua River, near Buenaventura, Valle Colombia and presents several transitional ecosystems between rainforest and very humid at altitudes between 50 and 300 masl. The samplings were carried out during the months of February and March of 2010 in 15 streams and three stations on the main channel of the river through the method of rapid ecological evaluation, protocols were followed to analyze the data by stream (qualitative indexes and graphs) , for the study of fish distribution (Rodríguez-Olarte et al. model, 2006) and finally the environmental assessment of the sampling stations (preliminary model of Interpretation of Fluvial Conservation-ICF). There were 39 species of fish belonging to six orders and 19 families, whose data were discriminated by order, family and sampling station. The order with the highest number of species was Characiformes with 11 species, followed by Siluriformes and Perciformes with 10 species each., which represented 79.4%. It is concluded that the ecological simplification of the studied aquatic environments obeys, among others to the loss of habitats by activities associated with deforestation, with the consequent increase of sediments and erosion; In addition, contamination by wastewater and fuels, the modification of channels and habitats by mining, the construction of civil works and the demand of water for domestic, recreational and agricultural use, and it is recommended to extend this research to delve into the conservation plan of habitats and fish species of the region.
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