Fish landings in Barcelos, in the Middle Negro River Region, Amazonas

Abstract

The purpose of this study was to gather information about fish landings in Barcelos, in the Middle Rio Negro region. Data were collected from fishing boats at weekends and from stalls where fish were processed and sold during the week. The results showed that in the period from February 2012 to January 2013, 56.0 tons of fish were landed and that average landings were 3.6 ± 2.2 tons/month and 1.1 ± 0.7 tons/month for fishing boats and for small boats with outboard motors, respectively. Pacu (subfamily Myleinae), aracu (family Anastomidae) and tucunaré (Cichla spp.) were the main species caught and accounted for approximately 50% of the landings. The Demeni River, Lake Anauali and Zamula streamlet were the most exploited fishing areas. Fishing boats exploited the lakes in the dry and flood seasons and the rivers in all seasons of the hydrological cycle, with a slight predominance in the falling-water season. Streamlets were also exploited by fishing boats in all the seasons apart from the flood season. Lakes were the preferred environment for small boats with outboard motors in the dry season. While rivers were exploited by these boats throughout the year, streamlets were exploited mainly in the rising-and fallingwater seasons. There was a decrease in fishing effort in the flood season and an increase in the dry season. Average CPUE was 21.9 and 23.9 kg/fisherman/day for fishing boats and for small boats with outboard motors, respectively.

Effects of Fishing on the Population of Speckled PavonCichla temensisin the Middle Negro River (Amazonas State, Brazil): A Decrease in the Size of the Trophy Fish?

“…The fishing fleet of the municipality of Barcelos consists of fishing boats and motorized canoes, both with wooden structures; the boats measure on average 10.8 m long and 2.8 m wide, while the canoes have an average length of 6.9 m and an average width of 1.7 m. These are used by approximately 280 fishers, who fish for species for food use and the fish-keeping market (Inomata and Freitas 2015a). The average annual production was 56.0 metric tons, consisting mainly of pacu (several species of Myleinae), aracu (several species of Anostomidae), peacock bass Cichla spp., filhote Brachyplatystoma sp., and piranha (various species of Serrasalmidae; Inomata and Freitas 2015b).…”

Socioeconomic aspects and profile of fishing according to fishers of commercial edible fish in the municipality of Barcelos, middle Negro River, Amazonas, Brazil

“…The study was conducted in the urban and rural areas of the municipality of Barcelos (Figure 1), which is considered the largest municipality in the state of Amazonas (122.461,086 Km 2 ) (IBGE, 2021). Its municipal seat is located on the right bank of the Negro River about 396 km in a straight line and 496 km via fluvial from Manaus,the capital of the state of Amazonas (Inomata and Freitas, 2015b). In this area, the Mariuá archipelago is found, which is constitutes a set of islands in what is known as the largest freshwater river archipelago in the world (Goulding et al, 1988;Inomata and Freitas, 2015a).…”

Freshwater sport fishing: characterization of operations in the middle Negro River, Amazonas, Brazil

“…This last species is distinguished from the others by reaching greater lengths (Jepsen et al, 1999;Hoeinghaus et al, 2003;Holley et al, 2008;Campos et al, 2015), growing at a faster pace than their congeners (Jepsen et al, 1999;Holley et al, 2008). In general, species of the genus reach medium to large sizes (Santos et al, 2006;Soares et al, 2007;Campos et al, 2015;Lubich et al, 2021) and are of great economic importance for commercial and sport fishing that occurs in the Rio Negro region (Inomata and Freitas, 2015;Lubich et al, 2021). Winemiller et al (1997) highlighted that peacock bass is the most widespread and abundant predatory fish in clear and black water systems of the Amazon and Orinoco basins.…”

“…Fishing is one of the artisanal activities that represents the largest source of employment and income generation in the Amazon region, and the types of fishing vary with the diverse spatial and seasonal scenarios that the region provides (McGrath et al, 2004). In the Amazon basin, six fishing modalities coexist, and four occur simultaneously in the Negro River basin, namely subsistence, commercial, ornamental, and sports (Freitas and Rivas, 2006;Sobreiro and Freitas, 2008;Inomata and Freitas, 2015). Among these modalities, sport fishing is the only one carried out for the purpose of tourism, leisure and/or sport, and is practiced predominantly in the form of catch and release (Brasil, 2009;Amazonas, 2011Amazonas, , 2018, which consists of capturing, photographing, measuring, and returning the fish to the environment.…”