Walter T, Petrere M
Coordenação Geral de Petróleo e Gás, CGPEG/IBAMA, Rio de Janeiro, RJ, Brazil.
Braz J Biol. 2007 Feb;67(1):9-21. doi: 10.1590/s1519-69842007000100003.
In many cases in large urban centers, which have appropriate waterbodies, small-scale fisheries are the only source of cheap protein for the poor. In Lago Paranoá, located in Brasília, the capital city of Brazil, fishing was studied by conducting interviews with 53 fishers filling in logbooks from March, 1999 to March, 2000 in three fishing communities. The fishers come from the poorest towns around Brasília, known as satellite-towns. They have been living there on average for 21.7 years (s = 9.6 years), their families have 4.9 members (s = 3.6) on average and 44.2% do not have a basic education. However, such characteristics are similar to the socioeconomic indices of the metropolis where they live. In spite of being illegal between 1966 and 2000, fishing generated an average monthly income of U 239.00 dollars (s = U 171.77 dollars). The Nile Tilapia Oreocrhromis niloticus is the main captured species (85% of a total number of landings in weight of 62.5 t.). Fishing is carried out in rowing boats, individually or in pairs. The fishing equipment used are gillnets and castnets. Gillnets were used actively, whereby the surface of the water is beaten with a stick to drive Tilapias towards nets as they have the ability to swim backwards. This fishing strategy was used in 64.7% of the fisheries, followed by castnets (31.1%) and by gillnets which were used less (4.2%). The fish is sold directly in the streets and fairs of the satellite-towns to middlemen or to bar owners. Three communities have different strategies in terms of fishing equipments, fishing spots and commercialization. Consequently, there are statistically significant differences in relation to the monthly income for each one of these communities.
在许多拥有合适水体的大型城市中心,小规模渔业是穷人获取廉价蛋白质的唯一来源。在巴西首都巴西利亚的帕拉诺阿湖,通过对三个捕鱼社区中填写1999年3月至2000年3月日志的53名渔民进行访谈,对捕鱼情况展开了研究。这些渔民来自巴西利亚周边最贫困的城镇,即卫星城。他们平均在那里生活了21.7年(标准差为9.6年),家庭平均有4.9名成员(标准差为3.6),44.2%的人没有接受过基础教育。然而,这些特征与他们所居住的大都市的社会经济指标相似。尽管在1966年至2000年期间捕鱼是非法的,但捕鱼带来的月平均收入为239.00美元(标准差为171.77美元)。尼罗罗非鱼是主要捕获物种(占总上岸重量62.5吨的85%)。捕鱼是乘坐划艇单独或成对进行的。使用的捕鱼设备是刺网和撒网。刺网使用较为频繁,人们会用棍子拍打水面,将能向后游的罗非鱼驱赶到网中。这种捕鱼策略在64.7%的捕鱼活动中被使用,其次是撒网(31.1%),使用较少的是刺网(4.2%)。鱼直接在卫星城的街道和集市上卖给中间商或酒吧老板。三个社区在捕鱼设备、捕鱼地点和商业化方面有不同策略。因此,这些社区各自的月收入在统计学上存在显著差异。