Vulnerability to overfishing of fish stocks in the Amazon Basin

Pereira, Diego V.; Mereles, Marcos de Almeida; Matos, Octavio Ferreira de; Lopes, Giulia Cristina dos Santos; Conceição, Katrine G; Freitas, Carlos Edwar de Carvalho

doi:10.1016/j.fishres.2023.106740

Cited by 5 publications

(1 citation statement)

References 74 publications

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“…), piramutaba (Brachyplatystoma vaillantii), and dourada (Brachyplatystoma rousseauxii) are showing signs of overfishing (Campos et al, 2015;Castello & Stewart, 2010;Catarino et al, 2019;Prestes et al, 2022). In addition to spatial and temporal constraints of stock assessment studies of these traditional fishery, all have focused on individual species, so the effects of intense fishing pressure on mixed-species are unknown (Goulding et al, 2019;Pereira et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Stable mean trophic level and decreasing fish size in Central Amazonian fishery landings

Matos,

Pereira,

Lopes

et al. 2023

Fisheries Management Eco

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Evaluating trends in fisheries, especially data‐limited small‐scale fisheries, is challenging. We used fish landings to evaluate changes in composition of fish landings in rivers of the Central Amazon, from a discontinuous historical 28‐year series of landings from different data collection systems in main ports of the city of Manaus, the largest consumer market in the region. Annual mean trophic level (MTL), fishing‐in‐balance index (FiB), and mean landed size (MSL) were estimated. MTL did not decline, FiB was positive in most years, and MSL declined. Relative catches of certain fish species were replaced by others at a similar trophic level, but mean body size declined over time. We conclude that fishing in the Central Amazon is not sustainable and would benefit from better management strategies.

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Section: Introductionmentioning

confidence: 99%

Stable mean trophic level and decreasing fish size in Central Amazonian fishery landings

Matos,

Pereira,

Lopes

et al. 2023

Fisheries Management Eco

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Seasonal effects on the potential spatial distribution of Amazonian migratory catfishes

Alvarez,

Freitas,

Begot

et al. 2024

Rev Fish Biol Fisheries

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Sentinel-1 data reveals unprecedented reduction of open water extent due to 2023-2024 drought in the central Amazon basin

Maciel,

Lousada,

Fassoni-Andrade

et al. 2024

Environ. Res. Lett.

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In 2023, an intense drought impacted the Amazon basin triggered by climate change and a strong El Niño event, with the Negro River reaching its lowest water level in 120 years. However, the spatiotemporal open water extent (OWE) during this drought remains unclear. This study comprehensively evaluates OWE variability in the central Amazon using Sentinel-1 synthetic aperture radar (SAR) data since 2017. Monthly OWE masks were generated through an empirical threshold classification with accuracy >95%. Overall, the central Amazon experienced a reduction of ∼8% in OWE in the 2023 dry season months (November and December) when compared to monthly-average. However, reductions of up to 80% in OWE were observed in several specific lakes. Our analysis underscores the unprecedented severity of the 2023/2024 drought on rivers and floodplains. Utilizing SAR remote sensing technologies, this study emphasizes the urgent need for proactive conservation measures to safeguard the Amazon’s ecological integrity amid escalating environmental challenges. Monthly water masks from January/2017 to September/2024 are available here: https://doi.org/10.5281/zenodo.12751783.

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Vulnerability to overfishing of fish stocks in the Amazon Basin

Cited by 5 publications

References 74 publications

Stable mean trophic level and decreasing fish size in Central Amazonian fishery landings

Stable mean trophic level and decreasing fish size in Central Amazonian fishery landings

Seasonal effects on the potential spatial distribution of Amazonian migratory catfishes

Sentinel-1 data reveals unprecedented reduction of open water extent due to 2023-2024 drought in the central Amazon basin

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