1. HYDROELECTRIC DAMS FROM MADEIRA RIVER SEASONALLY IMPACTS THE FISHERIES PRODUCTION IN THE GUAPORÉ BASIN (RONDÔNIA, BRAZIL)
- Author
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Helen Cristina Parazzi de Freitas, Raniere Garcez Costa Sousa, and Carolina Rodrigues da Costa Doria
- Subjects
Fish farming ,Drainage basin ,SH1-691 ,GC1-1581 ,Aquatic Science ,Fish stock ,Oceanography ,Tributary ,amazon basin ,medicine ,Aquaculture. Fisheries. Angling ,GE1-350 ,Water cycle ,geography ,geography.geographical_feature_category ,Amazon rainforest ,inland fishing ,Seasonality ,medicine.disease ,dams ,hydrological cycle ,Water level ,Fishery ,Environmental sciences ,Environmental science ,Animal Science and Zoology - Abstract
In the Amazon region, fisheries play an important role in the socioeconomic and cultural context and are directly affected by changes in the hydrological cycle, which can interfere with the numbers and frequencyof fish species landed. This study analyzed the variation of fishery production against the seasonality of the water level of the Guaporé River (a tributary of the Madeira River) using information contained in the records of fishery landings in the area under study. In addition, two periods pre (2000 to 2008) and post (2009 to 2019) installation of the Jirau and Santo Antônio dams in the Madeira River were considered. Fish production in the period prior to damming indicated linearity (r2 = 0.41) which was inversely proportional to the water levels of the Guaporé River, with low fish production in the flood and high production during the low water phases. However, for the period after damming, these variables showed low correlation (r2 = 0.14). Among the fish species exploited, 35.13% presented significant differences (p
- Published
- 2021