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

This work tests the null hypothesis that the coefficients of the total landings, landed values, mean catches and price per kg of migratory and resident species are constant over time following the installation of two large run-of-the-river hydroelectric dams in a large tropical river. To identify sh...

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Principais autores:	Lima, Maria Alice Leite, Carvalho, Adriana Rosa, Nunes, Marcus Alexandre, Angelini, Ronaldo, Doria, Carolina Rodrigues da Costa
Formato:	article
Idioma:	English
Publicado em:	Elsevier
Assuntos:	Amazon Fisheries Structural breaks Impoundment effects Price dynamics
Endereço do item:	https://repositorio.ufrn.br/handle/123456789/30565
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spelling	ri-123456789-305652023-02-06T18:40:01Z Declining fisheries and increasing prices: the economic cost of tropical rivers impoundment Lima, Maria Alice Leite Carvalho, Adriana Rosa Nunes, Marcus Alexandre Angelini, Ronaldo Doria, Carolina Rodrigues da Costa Amazon Fisheries Structural breaks Impoundment effects Price dynamics This work tests the null hypothesis that the coefficients of the total landings, landed values, mean catches and price per kg of migratory and resident species are constant over time following the installation of two large run-of-the-river hydroelectric dams in a large tropical river. To identify shifts in catches and economic returns due to river impoundment, we inspected daily landing data (25-year time series) and wholesale prices (19-year time series) for the Madeira River, the largest tributary of the Amazon River. Our results show that the period of decreasing catches and increasing prices observed for fisheries in the Madeira River matched the timings of the construction of the two dams. According to the results, both dams quickly changed catches and fish supply to market, which were immediately echoed in the price per kg of exploited fish species. Following the dam construction, prices rose for both fish that became scarce and fish that became abundant. Though catches declined 58% in 25 years, the price increased 49% over the same period, representing a high economic cost for the local population. Further, there was a clear decline in the catches of some species (e.g., the dourada and the curimatã), but increased catches of others (e.g., the sardine and the tucunaré). Moreover, some fluctuation patterns across years showed natural oscillations, or changes, in local habitats and even fishing efforts 2020-11-11T23:07:37Z 2020-11-11T23:07:37Z 2020 article LIMA, Maria Alice Leite; CARVALHO, Adriana Rosa; NUNES, Marcus Alexandre; ANGELINI, Ronaldo; DORIA, Carolina Rodrigues da Costa. Declining fisheries and increasing prices: the economic cost of tropical rivers impoundment. Fisheries Research, [S.L.], v. 221, p. 105399, jan. 2020. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0165783619302541. Acesso em: 04 nov. 2020. https://doi.org/10.1016/j.fishres.2019.105399 0165-7836 https://repositorio.ufrn.br/handle/123456789/30565 10.1016/j.fishres.2019.105399 en Elsevier
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Amazon Fisheries Structural breaks Impoundment effects Price dynamics
spellingShingle	Amazon Fisheries Structural breaks Impoundment effects Price dynamics Lima, Maria Alice Leite Carvalho, Adriana Rosa Nunes, Marcus Alexandre Angelini, Ronaldo Doria, Carolina Rodrigues da Costa Declining fisheries and increasing prices: the economic cost of tropical rivers impoundment
description	This work tests the null hypothesis that the coefficients of the total landings, landed values, mean catches and price per kg of migratory and resident species are constant over time following the installation of two large run-of-the-river hydroelectric dams in a large tropical river. To identify shifts in catches and economic returns due to river impoundment, we inspected daily landing data (25-year time series) and wholesale prices (19-year time series) for the Madeira River, the largest tributary of the Amazon River. Our results show that the period of decreasing catches and increasing prices observed for fisheries in the Madeira River matched the timings of the construction of the two dams. According to the results, both dams quickly changed catches and fish supply to market, which were immediately echoed in the price per kg of exploited fish species. Following the dam construction, prices rose for both fish that became scarce and fish that became abundant. Though catches declined 58% in 25 years, the price increased 49% over the same period, representing a high economic cost for the local population. Further, there was a clear decline in the catches of some species (e.g., the dourada and the curimatã), but increased catches of others (e.g., the sardine and the tucunaré). Moreover, some fluctuation patterns across years showed natural oscillations, or changes, in local habitats and even fishing efforts
format	article
author	Lima, Maria Alice Leite Carvalho, Adriana Rosa Nunes, Marcus Alexandre Angelini, Ronaldo Doria, Carolina Rodrigues da Costa
author_facet	Lima, Maria Alice Leite Carvalho, Adriana Rosa Nunes, Marcus Alexandre Angelini, Ronaldo Doria, Carolina Rodrigues da Costa
author_sort	Lima, Maria Alice Leite
title	Declining fisheries and increasing prices: the economic cost of tropical rivers impoundment
title_short	Declining fisheries and increasing prices: the economic cost of tropical rivers impoundment
title_full	Declining fisheries and increasing prices: the economic cost of tropical rivers impoundment
title_fullStr	Declining fisheries and increasing prices: the economic cost of tropical rivers impoundment
title_full_unstemmed	Declining fisheries and increasing prices: the economic cost of tropical rivers impoundment
title_sort	declining fisheries and increasing prices: the economic cost of tropical rivers impoundment
publisher	Elsevier
publishDate	2020
url	https://repositorio.ufrn.br/handle/123456789/30565
work_keys_str_mv	AT limamariaaliceleite decliningfisheriesandincreasingpricestheeconomiccostoftropicalriversimpoundment AT carvalhoadrianarosa decliningfisheriesandincreasingpricestheeconomiccostoftropicalriversimpoundment AT nunesmarcusalexandre decliningfisheriesandincreasingpricestheeconomiccostoftropicalriversimpoundment AT angelinironaldo decliningfisheriesandincreasingpricestheeconomiccostoftropicalriversimpoundment AT doriacarolinarodriguesdacosta decliningfisheriesandincreasingpricestheeconomiccostoftropicalriversimpoundment
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Declining fisheries and increasing prices: the economic cost of tropical rivers impoundment

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