Fishers’ knowledge indicates temporal changes in composition and abundance of fishing resources in Amazon protected areas

Animal Conservation - Tập 23 Số 1 - Trang 36-47 - 2020
Gustavo Hallwass1, Alexandre Schiavetti2,3, Renato Azevedo Matias Silvano4,1
1Fisheries and Food Institute (FIFO), UNISANTA, Santos, Brazil
2Investigador Asociado do CESIMAR CENPAT Chubut Argentina
3Laboratório de Etnoconservação e Áreas Protegidas (LECAP) Department of Agricultural and Environmental Science, State University of Santa Cruz (UESC) Ilhéus Brazil
4Departament of Ecology Federal University of Rio Grande do Sul (UFRGS) Porto Alegre Brazil

Tóm tắt

AbstractThe local ecological knowledge (LEK) of fishermen has been applied to reconstruct temporal patterns of resource abundance and to assess resource exploitation, especially in tropical ecosystems. Protected areas (PAs) are the main conservation measure in the Amazon, but their efficacy to improve fisheries is poorly known. The main goal of this study was to apply fishermen’ LEK to evaluate temporal changes in composition and abundance of exploited fish species among three different categories of PAs in the Tapajós River, Brazilian Amazon. We interviewed 203 fishers about their highest fish catches, and the main fish caught at two time periods: the beginning of their fishing careers and currently. Fishers’ LEK indicated decreases in citations of larger‐bodied fishes and in reported catches over time, evidencing a gradient of conservation according to PA's time of establishment and management rules. We noticed higher changes (reduced catches and smaller fish exploited) in the Environmental PA, established 10 years ago and lacking management plan and buffer zone. In National Forest, which was created 40 years ago with more restrictive management rules, fish composition and catches included larger commercial fish. The Extractive Reserve, which was created 15 years ago and lacks specific fishing rules, may be in an intermediate stage, as large fish and highest catches decreased over time, but medium and large fish are still exploited. Fishers’ LEK can be an invaluable but neglected source of data on temporal patterns of fishing pressure and conservation needs, especially in tropical megadiverse, poorly known and threatened rivers.

Từ khóa


Tài liệu tham khảo

10.1016/j.biocon.2008.01.006

10.1111/j.1523-1739.2008.01145.x

10.1111/j.1467-2679.2007.00252.x

10.1590/1809-4392200331066

Bayley P.B., 1989, Can. Spec. Publ. Fish. Aquat. Sci., 106, 385

10.1890/03-5072

10.1016/j.gloenvcha.2012.01.006

10.1038/srep34745

10.1007/s00267-008-9220-5

10.1111/conl.12008

10.1002/aqc.2491

Clarke K.R., 2006, Primer v6: user manual/tutorial

10.1007/s10695-008-9212-7

10.1126/science.1214594

10.1111/acv.12178

Hallwass G.(2015).Etnoecologia e pesca: influência de unidades de conservação e aplicação do conhecimento ecológico local de pescadores no manejo e conservação dos recursos pesqueiros no Baixo Rio Tapajós Amazônia brasileira. PhD thesis Federal University of Rio Grande do Sul Porto Alegre.

10.1080/09640568.2015.1081587

10.1890/12-0429.1

10.1016/j.jenvman.2013.05.037

10.1007/s10021-007-9100-5

10.1890/1051-0761(2000)010[1270:UTEKIS]2.0.CO;2

Huntington H., 2017, How small communities respond to environmental change: patterns from tropical to polar ecosystems, Ecol. Soc., 22, 9, 10.5751/ES-09171-220309

10.1111/j.1365-2400.2008.00599.x

10.1126/science.1059199

10.1016/S0169-5347(98)01384-6

10.1111/j.1467-2979.2000.00019.x

10.1017/S0030605316000247

10.1002/aqc.2910

10.1111/cobi.12843

10.1080/09640568.2010.508687

10.1111/j.1755-263X.2012.00253.x

10.1111/j.1469-1795.2010.00377.x

10.1139/f02-078

10.1016/S0169-5347(00)89171-5

10.1007/s11160-004-8362-7

10.1016/j.ecoser.2014.03.002

10.1007/s11160-007-9058-6

Prestes‐Carneiro G., 2015, Subsistence fishery at Hatahara (750‐1230 CE), a pre‐Columbian central Amazonian village, J. Archaeol. Sci. Rep., 8, 454

Runde A.(2018).Fishers’ knowledge identifies potential socio‐ecological impacts downstream of proposed dams in the Tapajós River Brazilian Amazon. Master thesis Federal University of Rio Grande do Sul Porto Alegre.

10.1111/j.1467-2979.2005.00185.x

10.1890/06-1369.1

10.1016/j.biocon.2011.02.023

10.1007/s10641-006-9043-2

10.1111/j.1600-0633.2008.00333.x

10.1007/s10021-013-9722-8

10.1002/aqc.2687

10.1016/0006-3207(85)90023-0

10.1111/j.1523-1739.2009.01395.x

10.5962/bhl.title.115390

10.1046/j.1365-2400.1999.00137.x

10.1126/science.aac7082

Thông tin
Thông tin xuất bản

Animal Conservation

Tập 23 Số 1

36-47

Thông tin tác giả