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Influence of protected areas on fish assemblages and fisheries in a large tropical river

  • Friedrich Wolfgang Keppeler (a1), Gustavo Hallwass (a2) and Renato Azevedo Matias Silvano (a2)

Protected areas are one of the main tools for biological conservation worldwide. Although they have contributed to an increase in fish abundance and alleviated the impacts of fishing on marine ecosystems, the impacts of fishing and of protected areas in freshwater ecosystems are less well known. We compared fishing productivity and fish assemblage descriptors of two distinct protected areas designated for sustainable use of natural resources and an unprotected area in the Tapajós River, in the Brazilian Amazon. Two hypotheses were tested: (1) fishers from protected areas have higher catch per unit effort than those from unprotected areas; and (2) fish assemblages in protected areas have higher biomass, abundance, presence of target species, species richness, fish size and mean trophic level than those in unprotected areas. A total of 2,013 fish landings were recorded and two surveys were undertaken to sample fishes. Eleven environmental parameters were quantified to distinguish between effects of environmental heterogeneity and protected areas. The catch per unit effort of fishers was higher within protected areas than in unprotected areas, suggesting that protected areas reduce the levels of fishing pressure and increase fishing productivity. However, the fish assemblage descriptors were correlated more with environmental variables than with protected areas, indicating a relatively weak effect of protected areas on fish communities in lakes. The results highlight the importance of considering the influence of environmental heterogeneity in fish conservation programmes, and the positive effect of protected areas on fishing productivity in freshwater environments.

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* Also at: Department of Ecology, Federal University of Rio Grande do Sul, PO Box 15007–91501-970, Porto Alegre, Brazil
† Also at: State University of Santa Cruz, Ilhéus, Brazil
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J.D. Allan , R. Abell , Z. Hogan , C. Revenga , B.W. Taylor , R.L. Welcomme & K. Winemiller (2005) Overfishing of inland waters. BioScience, 55, 10411051.

O.T. Almeida , K. Lorenzen & D.G. McGrath (2009) Fishing agreements in the lower Amazon: for gain and restraint. Fisheries Management and Ecology, 16, 6167.

K.H. Andersen & M. Pedersen (2010) Damped trophic cascades driven by fishing in model marine ecosystems. Proceedings of the Royal Society B, 277, 795802.

D.A. Arrington , K.O. Winemiller & C.A. Layman (2005) Community assembly at the patch scale in a species rich tropical river. Oecologia, 144, 157167.

A. Begossi , R.A.M. Silvano , B.D. Amaral & O.T. Oyakawa (1999) Use of fish and game by inhabitants of an extractive reserve (Upper Juruá, Acre, Brazil). Environment, Development and Sustainability, 1, 7393.

E. Benedito-Cecilio & C.A.R.M. Araujo-Lima (2002) Variation in the carbon isotope composition of Semaprochilodus insignis, a detritivorous fish associated with oligotrophic and eutrophic Amazonian rivers. Journal of Fish Biology, 60, 16031607.

M.P. Blanco-Parra & I. Bejarano-Rodríguez (2006) Alimentación y reproducción de las principales espécies ícticas del río Mesay durante el período de “aguas altas”. Revista de Biología Tropical, 54, 853859.

L. Castello , C.C. Arantes , D.G. McGrath , D.J. Stewart & F.S. De Sousa (2015) Understanding fishing-induced extinctions in the Amazon. Aquatic Conservation, 25, 587598.

L. Castello , D.G. McGrath & P.S.A. Beck (2011) Resource sustainability in small-scale fisheries in the Lower Amazon floodplains. Fisheries Research, 110, 356364.

L. Castello , D.G. McGrath , L.L. Hess , M.T. Coe , P.A. Lefebvre , P. Petry (2013) The vulnerability of Amazon freshwater ecosystems. Conservation Letters, 6, 217229.

L. Castello , J.P. Viana , G. Watkins , M. Pinedo-Vasquez & V.A. Luzadis (2009) Lessons from integrating fishers of arapaima in small-scale fisheries management at the Mamirauá Reserve, Amazon. Environmental Management, 43, 197209.

J. Claudet (2011) Marine Protected Areas: A Multidisciplinary Approach. Cambridge University Press, Cambridge, UK.

C.C. Fernandes (1997) Lateral migration of fishes in Amazon floodplains. Ecology of Freshwater Fish, 6, 3644.

J. Ferreira , L.E.O.C. Aragão , J. Barlow , P. Barreto , E. Berenguer , M. Bustamante (2014) Brazil's environmental leadership at risk: mining and dams threaten protected areas. Science, 346, 706707.

K. Galacatos , R. Barriga-Salazar & D.J. Stewart (2004) Seasonal and habitat influences on fish communities within the lower Yasuni River basin of the Ecuadorian Amazon. Environmental Biology of Fishes, 71, 3351.

A. Garcia , S. Tello , G. Vargas & F. Duponchelle (2009) Patterns of commercial fish landings in the Loreto region (Peruvian Amazon) between 1984 and 2006. Fish Physiology and Biochemistry, 35, 5367.

S. Gelcich , N. Godoy , L. Prado , J.C. Castilla (2008) Add-on conservation benefits of marine territorial user rights fishery policies in Central Chile. Ecological Applications, 18, 273281.

F.R. Gell & C.M. Roberts (2003) Benefits beyond boundaries: the fishery effects of marine reserves. Trends in Ecology and Evolution, 18, 448455.

G. Hallwass , P.F. Lopes , A.A. Juras & R.A.M. Silvano (2011) Fishing effort and catch composition of urban market and rural villages in Brazilian Amazon. Environmental Management, 47, 188200.

G. Hallwass , P.F. Lopes , A.A. Juras , & R.A.M. Silvano (2013a) Behavioral and environmental influences on fishing rewards and the outcomes of alternative management scenarios for large tropical rivers. Journal of Environmental Management, 128, 274282.

G. Hallwass , P.F. Lopes , A.A. Juras & R.A.M. Silvano (2013b) Fishers’ knowledge identifies environmental changes and fish abundance trends in impounded tropical rivers. Ecological Applications, 23, 392407.

B.S. Halpern (2003) The impact of marine reserves: do reserves work and does reserve size matter? Ecological Applications, 13, 117137.

D.J. Hoeinghaus , A.A. Agostinho , L.C. Gomes , F.M. Pelicice , E.K. Okada , J.D. Latini (2009) Effects of river impoundment on ecosystem services of large tropical rivers: embodied energy and market value of artisanal fisheries. Conservation Biology, 23, 12221231.

V.J. Isaac , Da C.O. Silva & M.L. Ruffino (2008) The artisanal fishery fleet of the lower Amazon. Fisheries Management and Ecology, 15, 179187.

C.A. Layman , K.O. Winemiller , D.A. Arrington & D.B. Jepsen (2005) Body size and trophic position in a diverse tropical food web. Ecology, 86, 25302535.

P.F.M. Lopes , R.A.M. Silvano & A. Begossi (2011) Extractive and sustainable development reserves in Brazil: resilient alternatives to fisheries? Journal of Environmental Planning and Management, 54, 421443.

P.F.L. Maccord , R.A.M. Silvano , M.S. Ramires , M. Clauzet & A. Begossi (2007) Dynamics of artisanal fisheries in two Brazilian Amazonian reserves: implications to co-management. Hydrobiologia, 583, 365376.

C.E. Melo , F.A. Machado & V. Pinto-Silva (2004) Feeding habits of fish from a stream in the savanna of Central Brazil, Araguaia Basin. Neotropical Ichthyology, 2, 3744.

B. de Mérona & J. Rankin-de-Mérona (2004) Food resource partitioning in a fish community of the central Amazon floodplain. Neotropical Ichthyology, 2, 7584.

B. Mérona , G.M. Santos & R.G. Almeida (2001) Short term effects of Tucuruí Dam (Amazonia, Brazil) on the trophic organization of fish communities. Environmental Biology of Fishes, 60, 375392.

L.E. Miranda (2011) Depth as an organizer of fish assemblages in floodplain lakes. Aquatic Sciences, 73, 211221.

J.L. Nel , D.J. Roux , G. Maree , C.J. Kleynhans , J. Moolman , B. Reyers (2007) Rivers in peril inside and outside protected areas: a systematic approach to conservation assessment of river ecosystems. Diversity and Distributions, 13, 341352.

S.R. Palumbi (2004) Marine reserves and ocean neighborhoods: the spatial scale of marine populations and their management. Annual Review of Environment and Resources, 29, 3168.

D. Pauly , V. Christensen , J. Dalsgaard , R. Froese & F. Torres Jr (1998) Fishing down marine food webs. Science, 279, 860863.

D. Pauly , M.L. Palomares , R. Froese , P. Sa-a , M. Vakily , D. Preikshot & S. Wallace (2001) Fishing down Canadian aquatic food webs. Canadian Journal of Fisheries and Aquatic Sciences, 58, 5162.

P. Petry , P.B. Bayley & D.F. Markle (2003) Relationships between fish assemblages. macrophytes and environmental gradients in the Amazon River floodplain. Journal of Fish Biology, 63, 547579.

M.-J. Rochet (1998) Short-term effects of fishing on life history traits of fishes. ICES Journal of Marine Science, 55, 371391.

M.A. Rodriguez & W.M. Lewis Jr (1997) Structure of fish assemblages along environmental gradients in floodplain lakes of the Orinoco River. Ecological Monographs, 67, 109128.

U. Saint-Paul , J. Zuanon , M.A.V. Correa , M. García , N.N. Fabré , U. Berger & W.J. Junk (2000) Fish communities in central Amazonian white- and blackwater floodplains. Environmental Biology of Fishes, 57, 235250.

J.C. Sá-Oliveira , R. Angelini & V.J. Isaac-Nahum (2014) Diet and niche breadth and overlap in fish communities within the area affected by an Amazonian reservoir (Amapá, Brazil). Anais da Academia Brasileira de Ciências, 86, 383405.

C.C. Silva , E.J.G. Ferreira & C.P. Deus (2008a) Dieta de cinco espécies de Hemiodontidae (Teleostei, Characiformes) na área de influência do reservatório de Balbina, rio Uatumã, Amazonas, Brasil. Iheringia, 98, 464468.

C.C. Silva , E.J.G. Ferreira & C.P. Deus (2008b) Diet of Bryconops alburnoides and B. caudomaculatus (Osteichthyes: Characiformes) in the region affected by Balbina Hydroelectric Dam (Amazon drainage, Brazil). Neotropical Ichthyology, 6, 237242.

R.A.M. Silvano , G. Hallwass , P.F. Lopes , A.R. Ribeiro , R.P. Lima , H. Hasenack (2014) Co-management and spatial features contribute to secure fish abundance and fishing yields in tropical floodplain lakes. Ecosystems, 17, 271285.

R.A.M. Silvano , M. Ramires & J. Zuanon (2009) Effects of fisheries management on fish communities in the floodplain lakes of a Brazilian Amazonian Reserve. Ecology of Freshwater Fish, 18, 156166.

C.D. Suski & S.J. Cooke (2007) Conservation of aquatic resources through the use of freshwater protected areas: opportunities and challenges. Biodiversity Conservation, 16, 20152029.

F.L. Tejerina-Garro , R. Fortin & M.A. Rodríguez (1998) Fish community structure in relation to environmental variation in floodplain lakes of the Araguaia River, Amazon Basin. Environmental Biology of Fishes, 51, 399410.

H.C.G. Vasconcellos & J.C.S. Oliveira (2011) Alimentação de Potamotrygon motoro (CHONDRICHTHYES, POTAMOTRYGONIDAE) na planície de inundação da APA do Rio Curiaú, Macapá-Amapá-Brasil. Biota Amazônia, 1, 6673.

R.L. Welcomme (1999) A review of a model for qualitative evaluation of exploitation levels in multi-species fisheries. Fisheries Management and Ecology, 6, 119.

R.L. Welcomme (2001) Inland Fisheries: Ecology and Management. Fishing News Books, Oxford, UK.

K.O. Winemiller (2005) Life history strategies, population regulation, and implications for fisheries management. Canadian Journal of Fisheries and Aquatic Sciences, 62, 872885.

K.O. Winemiller & D.B. Jepsen (1998) Effects of seasonality and fish movement on tropical river food webs. Journal of Fish Biology, 53, 267296.

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