<b>Jatuarana fishing dynamics <i>Brycon amazonicus</i> (Spix & Agassiz, 1829) of the upper and middle Madeira River Basin

Abstract

ABSTRACT. The jatuarana (Brycon amazonicus), is an important species for the Madeira River commercial fisheries. The paper aims to characterize the jatuarana fishing dynamics in the middle Madeira River and test whether there are differences dowstreams and upstreams the Teotônio waterfall. Commercial fisheries landings were monitored daily at 15 ports or riverine communities along that stretch, using semistructured interviews with fishermen. With data from the fishing monitoring program of UHEs Santo Antônio and Jirau we analysed: the yield, catch per unit effort (CPUE), length structure, locations and fishing gear used, between 2009 to 2011.The fishing yield of this species was temporaly analyzed with data from the Fishermen Colony of Porto Velho city (Rondônia state, Brazil), between 1990 to 2012. The yield and the CPUE showed significant differences by area and locations and the capture of the species was carried out primarily in the channel river and banks river through gillnets. In addition, the samples collected in the upstream area have higher distribution and modal lengths than from those collected downstream. These results suggest that the areas require distinct management measures.

Damming Amazon Rivers: Environmental impacts of hydroelectric dams on Brazil’s Madeira River according to local fishers’ perception

“…Rainey and Rainey (2016) recorded a similar situation in Porto Velho, where local fishers reported a major increase in the availability of fish in 2014. Some studies have recorded peaks in fishery productivity in years with atypical floods, such as 2014 (as well as 1993 and 1997) on the Madeira River (Doria and Lima 2015;Lima et al 2017;Ayla et al 2018). These peaks in fishery productivity recorded during exceptional floods may have been associated primarily with the higher river levels recorded in the preceding years (Lima et al 2017).…”

Socioeconomia E Pesca Ribeirinha

“…A matrinxã se destaca comercialmente, estando entre as principais espécies mais capturadas (NASCIMENTO et al 2020). Apesar de estudos realizados sobre o desembarque mostrarem que variam as quantidades capturadas por espécie, a matrinxã sempre compõe uma boa parte dessas capturas, como é exemplificado por Gonzales et al (2019) e Ayala et al (2018). Além da grande relevância para a pesca comercial e de subsistência, se destaca também na aquicultura regional (NASCIMENTO et al…”