2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2018 | 11:00 AM - 11:15 AM | DAMS, FISH, AND FISHERIES IN THE AMAZON BASIN | 430 B
DAMS, FISH, AND FISHERIES IN THE AMAZON BASIN
Construction of large hydroelectric dams in the Amazon Basin affects the processes leading to fish production. Yet, little is understood about how dams affect fisheries in the Amazon. Dams affect fish populations by blocking their longitudinal migrations and disrupting their lateral floodplain migrations to feeding and reproductive areas. But these effects vary by taxa, as the life cycles of Amazonian fishes involve home ranges from tens to thousands of km, and migrations that can be longitudinal (i.e., along river channels), lateral (i.e., between river channels and floodplains), or both. The effects of any given dam on fisheries thus depend on the configuration of life cycles involved and the extent to which the dam disrupts fishes' lateral and longitudinal migrations. Whereas dams can extirpate fish populations that migrate longitudinally through the place where the dam was built, their effects on lateral migrant taxa depend on the extent to which they disrupt flow seasonality. Large disruptions of river flow seasonality can adversely affect fisheries of several of the dominant fishery taxa over long downstream distances. These potential impacts highlight the need to empirically assess dam impacts on Amazonian fisheries.
- Fish
- Floodplain
- Life History
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Presenters/Authors
Leandro Castello
(), Virginia Tech, leandro@vt.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -