Declining fisheries and increasing prices: The economic cost of tropical rivers impoundment

Lima, Maria Alice Leite; Carvalho, Adriana Rosa; Nunes, Marcus Alexandre; Angelini, Ronaldo

doi:10.1016/j.fishres.2019.105399

Cited by 30 publications

(23 citation statements)

References 61 publications

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“…Furthermore, the change in the aquatic environment caused by the Madeira River dams -linked to decreased production of P. pirinampu and B. platynemum -is already reflected in the sale prices of these fish species. The values observed during the study were already around 50% higher in 2014 (Lima et al, 2020), as ascertained in markets within the study area. This is explained by the impacts of the barrages on the ecological process of large catfish migrations, which are highly dependent on the Amazon's hydrographic ecosystem.…”

Section: Discussionsupporting

confidence: 52%

“…Moreover, production levels tend to decrease even further, due to the drastic reduction of catfish stocks, among other species, in the short term. This has already been confirmed in a study by Lima et al (2020), with the authors identifying a multi-species catfish biomass reduction starting in 2011. Given the importance of these catfish as fishery resources throughout the Amazon basin, any reduction in their fishing populations will cause social and ecological impacts far beyond the boundaries of the Madeira River basin (Barthem et al, 2017).…”

Section: Discussionmentioning

confidence: 52%

“…This is explained by the impacts of the barrages on the ecological process of large catfish migrations, which are highly dependent on the Amazon's hydrographic ecosystem. Both dams abruptly changed landing quantities and the supply of fish to the market, immediately leading to an increase in price per kilo of the species under study (Lima et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…It has large barbels (Lauzanne and Loubens, 1985) and an adipose fin that starts after the dorsal and runs almost to the caudal fin (Queiroz et al, 2013). This species is important in the Madeira basin, where it represented 2.1% of total landings between 1990 and 2014 and is considered one of the key species (Lima, 2017;Lima et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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FISHING PRODUCTION OF Pinirampus pirinampu AND Brachyplatystoma platynemum CATFISH HAS BEEN AFFECTED BY LARGE DAMS OF THE MADEIRA RIVER (BRAZILIAN AMAZON)

et al. 2020

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The present study analyzed landing events of commercial fishing of two species of large catfish in 11 fish landing sites along the Madeira River, and temporally and spatially characterized the exploitation of these species before and after the closure of the Jirau and Santo Antônio hydroelectric dams. Our results show that the Madeira River dams have negatively affected the fishing production of Pinirampus pirinampu and Brachyplatystoma platynemum catfish, drastically reducing these species' harvest as well as the incomes of regional fishers. If the irreversible loss of these species of Amazonian catfish is to be avoided, public policies and measures for the management and sustainable handling of this fishery resource must be implemented urgently.

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Section: Discussionsupporting

confidence: 52%

Section: Discussionmentioning

confidence: 52%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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FISHING PRODUCTION OF Pinirampus pirinampu AND Brachyplatystoma platynemum CATFISH HAS BEEN AFFECTED BY LARGE DAMS OF THE MADEIRA RIVER (BRAZILIAN AMAZON)

et al. 2020

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“…An analysis using environmental vulnerability indices has identified the Madeira as the Amazonian river system that is most threatened by dam construction (Latrubesse et al, 2017). Recent studies on the impacts of the Jirau and Santo Antônio dams report decreases in downstream fishery yields (Santos et al, 2018;Lima et al, 2020) and suspended sediment concentrations (Latrubesse et al, 2017)-although the attribution of suspended sediment changes to the dams has been questioned because concentrations have also decreased upstream of both reservoirs (Ayes et al, 2019). A remote sensing analysis has revealed that the area inundated by the Jirau and Santo Antônio dams is 60% larger than initially predicted in pre-dam environmental impact assessments (Cochrane et al, 2017), which may be in part related to changes in project design.…”

Section: Introductionmentioning

confidence: 99%

Hydropeaking Operations of Two Run-of-River Mega-Dams Alter Downstream Hydrology of the Largest Amazon Tributary

Almeida

Hamilton

Rosi

et al. 2020

Front. Environ. Sci.

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Vulnerability of the biota in riverine and seasonally flooded habitats to damming of Amazonian rivers

Latrubesse

d’Horta

Ribas

et al. 2020

Aquatic Conservation

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The extent and intensity of impacts of multiple new dams in the Amazon basin on specific biological groups are potentially large, but still uncertain and need to be better understood. It is known that river disruption and regulation by dams may affect sediment supplies, river channel migration, floodplain dynamics, and, as a major adverse consequence, are likely to decrease or even suppress ecological connectivity among populations of aquatic organisms and organisms dependent upon seasonally flooded environments. This article complements our previous results by assessing the relationships between dams, our Dam Environmental Vulnerability Index (DEVI), and the biotic environments threatened by the effects of dams. Because of the cartographic representation of DEVI, it is a useful tool to compare the potential hydrophysical impacts of proposed dams in the Amazon basin with the spatial distribution of biological diversity. As the impact of Amazonian dams on the biota of both rivers and periodically flooded riparian environments is severe, DEVIs from different Amazonian tributary basins are contrasted with patterns of diversity and distribution of fish, flooded forest trees and bird species. There is a consistent relationship between higher DEVI values and the patterns of higher species richness and endemism in all three biological groups. An assessment of vulnerability at the scale of tributary basins, the assessment of biodiversity patterns related to DEVI, and the analysis of teleconnections at basin scale, demonstrate that recent construction of dams is affecting the biota of the Amazon basin. The evidence presented here predicts that, if currently planned dams are built without considering the balance between energy production and environmental conservation, their cumulative effects will increase drastically and represent a major threat to Amazonian biodiversity.

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Declining fisheries and increasing prices: The economic cost of tropical rivers impoundment

Cited by 30 publications

References 61 publications

FISHING PRODUCTION OF <i>Pinirampus pirinampu</i> AND <i>Brachyplatystoma platynemum</i> CATFISH HAS BEEN AFFECTED BY LARGE DAMS OF THE MADEIRA RIVER (BRAZILIAN AMAZON)

FISHING PRODUCTION OF <i>Pinirampus pirinampu</i> AND <i>Brachyplatystoma platynemum</i> CATFISH HAS BEEN AFFECTED BY LARGE DAMS OF THE MADEIRA RIVER (BRAZILIAN AMAZON)

Hydropeaking Operations of Two Run-of-River Mega-Dams Alter Downstream Hydrology of the Largest Amazon Tributary

Vulnerability of the biota in riverine and seasonally flooded habitats to damming of Amazonian rivers

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