Fish Ecology of the Alto Madre de Dios River Basin (Peru): Notes on Electrofishing Surveys, Elevation, Palm Swamp and Headwater Fishes
Autor: | Hernán Ortega, Julio Araujo-Flores, Andrea Pino-del-Carpio, Adrián Ramos-Merchante, Rafael Miranda, Ibon Tobes |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
0106 biological sciences
Watershed lcsh:Hydraulic engineering Mauritia flexuosa Trichomycterus Geography Planning and Development Drainage basin Aquatic Science 010603 evolutionary biology 01 natural sciences Biochemistry Swamp lcsh:Water supply for domestic and industrial purposes Canonical correspondence analysis lcsh:TC1-978 anatomy_morphology Astroblepus Water Science and Technology geography lcsh:TD201-500 geography.geographical_feature_category Tropical Andes Ecology 010604 marine biology & hydrobiology Community structure Manu Biosphere Reserve Fishing techniques Habitat Electrofishing |
Zdroj: | Water Volume 13 Issue 8 Water, Vol 13, Iss 1038, p 1038 (2021) Dadun. Depósito Académico Digital de la Universidad de Navarra instname Arias Montano. Repositorio Institucional de la Universidad de Huelva |
ISSN: | 2073-4441 |
DOI: | 10.3390/w13081038 |
Popis: | Our study analyzes the distribution of fish communities related to the environmental variables of the Alto Madre de Dios River, an Andean-Amazon watershed of southern Peru, between 300 and 2811 m a.s.l. within the Manu Biosphere Reserve. We provide new ecological and diversity data on fishes for these poorly studied rivers and new data for palm swamp habitats. With electric fishing techniques, we collected a total of 1934 fish specimens belonging to 78 species, 42 genera and 15 families. To assess main patterns of diversity we combined SIMPER and ANOSIM with canonical correspondence analysis to obtain an overview of the community structure of fish and their distribution related to aquatic habitats. Our results show an important shift on fish diversity at 700 m a.s.l. separating headwater and middle-lowland communities. Electrofishing was a hindrance due to the depth, flow and low conductivity of the rivers, but also allowed us to capture fish not observed with other techniques. We also compared the use of elevation with slope as an alternative variable for statistical analysis. Our results show that slope offers a solid and equivalent explanation for fish distribution variability, avoids redundance, and instead of giving geographical data offers ecologically solid information. |
Databáze: | OpenAIRE |
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