Food consumption as an indicator of the conservation of natural resources in riverine communities of the Brazilian Amazon

Isaac, Victória J.; Almeida, Morgana Carvalho de; Giarrizzo, Tommaso; Deus, Cláudia Pereira de; Vale, R.M.R.D. Coelho Do; Klein, Gilmar Nicolau; Begossi, Alpina

doi:10.1590/0001-3765201520140250

Cited by 89 publications

(68 citation statements)

References 26 publications

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“…A sazonalidade observada na produção total e na composição da captura refletem as variações no nível hidrológico que afetam o comportamento migratório, a disponibilidade e a densidade das populações de peixes e demonstram a adaptação do homem amazônico as variações do meio (ISAAC et al, 2015). Esta influência era esperada visto que representa o padrão amazônico para pesca de pequena escala.…”

Section: Discussionunclassified

“…Isso porque na pesca de subsistência o pescador utliza-se de diferentes estratégias, buscando ter sempre o alimento, capturando maior número de espécies. Altos valores de consumo do pescado, como no caso do Cuniã, podem também estar associados à existência de áreas protegidas na localidade, que garantem segurança alimentar às populações e ao isolamento desta comunidade dos grandes centros (ISAAC et al, 2015).…”

Section: Discussionunclassified

“…Especialmente a pesca, que em ambientes amazônicos é diretamente influenciada pelo ciclo hidrológico regional (JUNK 1989;BATISTA;ISAAC, VIANA, 2004). A dinâmica da atividade pesqueira desenvolvida na Amazônia apresenta diferenças não somente em função das características ambientais, mas também em função das características dos atores, das espécies exploradas, dos apetrechos e das embarcações utilizados, do destino final da produção, bem como da demanda e da proximidade do mercado consumidor (ISAAC; RUFFINO: MELO, 2000;SANTOS;SANTOS, 2005;FREITAS, 2007;ALMEIDA, 2011, ISAAC et al, 2015. Estas características também afetam o padrão alimentar e o consumo do pescado das comunidades ribeirinhas e urbanas.…”

Section: Introductionunclassified

“…As escolhas alimentares podem variar de acordo com: acesso a diferentes itens alimentares, a sazonalidade do recurso, bem como as condições socioeconômicas e/ou culturais (SILVIA; BEGOSSI, 2009;ISAAC et al, 2015). Na Amazônia, o consumo do pescado é mais intenso em áreas isoladas dos grandes centros porque estão sujeitas a altos custos de transporte para o uso 1 Reconhecidas como comunidades tradicionais no Decreto Presidencial n o 6.040 (BRASIL, 2007), as comunidades ribeirinhas têm a pesca artesanal como principal atividade econômica, além disso, podem desenvolver outras atividades extrativistas e de subsistência na unidade de produção familiar (NEVES, 2005). de bens e serviços das áreas urbanas (ISAAC et al, 2015). Nas comunidades mais próximas dos centros urbanos o consumo do pescado diminui em proporção com os demais tipos de proteína animal, devido a facilidade de acesso a outros produtos nos mercados locais, provocando também menor dependência dos recursos naturais (MURRIETA et al, 2008;COSTA et al, 2013).…”

Section: Introductionunclassified

“…Entender como essas diferenças afetam a dinâmica da pesca e o consumo do pescado nas comunidades, pode oferecer informações sobre abundância e diversidade dos recursos naturais disponíveis no ambiente, bem como gerar indicadores de conservação (ISAAC et al, 2015) e subsidiar propostas de manejo que visem a sustentabilidade da atividade pesqueira na região.…”

Section: Introductionunclassified

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A pesca em comunidades ribeirinhas na região do médio rio Madeira, Rondônia

Doria

Machado

Souza

2016

NCN

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ResumoA importância da pesca na unidade familiar de produção (UFP) e a delimitação dos fatores que a influenciam constituem o hiato na caracterização da atividade em regiões da Amazônia sob iminência de impactos de grandes projetos. Este estudo avaliou a dinâmica e a importância da pesca em UFP de comunidades ribeirinhas à jusante da cachoeira do Teotônio (rio Madeira) e a influência na composição e abundância das espécies capturadas, de fatores ambientais, distância dos mercados e destinação da captura. ) e padrões entre as comunidades que refetem ambos os fatores ambientais, distância do pescado consumidor e destino da captura. AbstractThe fisheries importance in the family unit of production and the identification of factors that influence it, make up the gap in the characterization of the activity in the Amazon region under the impendence of large projects impacts. This study evaluated and compared the dynamics and the importance of fishing in the family unit in riverside communities downstream of Santo Antonio Dam (Madeira River) and, the influence of environmental, isolation and fishing destination in the composition and abundance of the catch. Between August/2009 and July/2010 (pre-dam period), 23 families recorded daily information about the activity to analyze the total catch, monthly and specific fish consumed and marketed and fishing effort. The results show the importance of family fishing (average production: 2.403±2.261kg.family.year ) and that differences between communities are related to both destination, isolation and environmental factors.

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Section: Discussionunclassified

Section: Introductionunclassified

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A pesca em comunidades ribeirinhas na região do médio rio Madeira, Rondônia

Doria

Machado

Souza

2016

NCN

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Ecological influences of human population size and distance to urban centres on fish communities in tropical lakes

Keppeler

Souza

Hallwass

et al. 2018

Aquatic Conservation

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1. Human population growth is a major cause of species extinction worldwide, and tropical fresh waters are among the most imperilled ecosystems. The identification of major drivers of human impacts on fish can benefit conservation programmes and management plans.2. The influences of the proximity to urban centres and human population size on six ecological indicators of fish communities (abundance, biomass, richness, diversity, average size, and size dominance pattern) were investigated in 48 floodplain lakes of five main rivers of the Brazilian Amazon (Tocantins, Tapajós, Negro, Solimões, and the Lower Amazon). These ecological indicators were also compared among the rivers studied and checked for any influence of the environmental variables of lakes (size, shape of natural shoreline, distance to the main river channel, depth, transparency, conductivity, and dissolved oxygen).3. Lake distance to urban centre was positively related to average fish size and dominance of large fish, indicating direct human effects caused by fisheries or indirect effects by habitat alteration (e.g. deforestation). Unexpected positive relationships between human population size and the richness and diversity of fishes were found, and may be caused by ecological compensatory effects, the abundance of rare non-fished species, or the proximity of an urban centre to ecotone areas.The other ecological indicators were unrelated to anthropogenic variables. Environmental factors affected fish communities, but did not change the conclusions regarding the effect of the anthropogenic variables. River basin was strongly related to species richness, diversity, biomass, and abundance of fish. Distance to the river channel was positively related to fish biomass. 4. The disappearance of large fish threatens the food security of riverine communities, and may harm essential ecosystem services. Conservation measures, including local management initiatives, protected areas, fisheries monitoring, and the

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Hydrological controls of fisheries production in a major Amazonian tributary

Lima

Kaplan

2017

Ecohydrology

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Amazonian rivers are characterized by a strongly seasonal flood pulse, which is being altered by ongoing and planned hydropower development across the basin. Changes in hydrology have a cascade of physical, ecological, and social effects, and some ecohydrological changes in the Amazon are expected to be irreversible. To better understand these linkages, we investigated shared trends and causal factors driving fish catch in a major Amazonian tributary before dam construction to derive relationships between catch and natural hydrologic dynamics that can be used to assess likely post‐dam fisheries impacts. We applied a time series‐based dimension reduction technique (dynamic factor analysis) to investigate dynamics in fish catch across 10 commercially important species using daily fish landings and hydrological data. We found a 4‐trend dynamic factor model to best fit the observed data, with fitted trends exhibiting variation representative of seasonal and longer‐term hydrologic variation. We next considered 11 candidate explanatory time series and found the best dynamic factor model used 4 explanatory variables: maximum water level, flooding duration, previous year's flow, and rate of change in flow; however, each species showed a unique response to this set of hydrological variables. Species‐specific responses suggested that future dam operating rules need to closely mimic the natural hydrologic regime in order to maintain the biological dynamics of this and similarly diverse systems. In particular, high flows associated with increased catch the following year are important to maintain, but may be difficult to achieve in the context of reservoir regulation and energy production goals.

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Food consumption as an indicator of the conservation of natural resources in riverine communities of the Brazilian Amazon

Cited by 89 publications

References 26 publications

A pesca em comunidades ribeirinhas na região do médio rio Madeira, Rondônia

A pesca em comunidades ribeirinhas na região do médio rio Madeira, Rondônia

Ecological influences of human population size and distance to urban centres on fish communities in tropical lakes

Hydrological controls of fisheries production in a major Amazonian tributary

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