Ictiofauna de igarapes de pequenas bacias de drenagem em área agrícola do Nordeste Paraense, Amazonia Oriental

Corrêa, Jean Michel; Gerhard, Pedro; Figueiredo, R. de O.

doi:10.4136/ambi-agua.739

Cited by 10 publications

(11 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to Espírito-Santo et al (2009), fish assemblages and the physical characteristics of small streams vary in the dry and rainy seasons. As the water level reaches or overtops the banks, new food resources become available to fishes (Corrêa et al 2012). Trophic relationships in fish communities are affected by the availability of resources (Ximenes et al 2011;Ferreira et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…These streams are also subject to frequent, rapid flood pulses (Carvalho et al 2013). Heavy rains in drainage basins are one factor leading to environmental changes in streams (Corrêa et al 2012). According to Espírito-Santo et al (2009), fish assemblages and the physical characteristics of small streams vary in the dry and rainy seasons.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Feeding ecology of Serrapinnus notomelas (Characiformes: Cheirodontinae) in small forest streams in the Machado River basin, Rondônia, Brazil

Costa

Rocha

2017

Acta Amaz.

View full text Add to dashboard Cite

Studies on the trophic structure of fish give information on species autoecology and their role in the ecosystem. The aims of this study were to characterize the diet of Serrapinnus notomelas in small streams of the River Machado basin and to assess the effect of rainfall seasonality. Fish were collected bimonthly from July 2013 to May 2014 with seine nets and hand nets. The length of each specimen was measured to identify category classes. There were also measured the fullness index and volume of each ingested item, and these data were combined to obtain an alimentary index. We used ANOVA and Kruskal-Wallis to test for differences between length classes and fullness index, Chi-squared tests to detect seasonal differences in origin of food items and non-metric multidimensional scaling analysis to examine temporal variation in diet. We found that most of the specimens were longer than 20 mm, showing a polymodal distribution. In both seasons stomachs of most fish were full. Serrapinnus notomelas feeds on items of plant and animal origin. A higher consumption of aquatic macrophytes and algae was observed, suggesting omnivorous feeding behavior with a tendency to herbivory. Items of plant and autochthonous origin were consumed more than other items in both seasons, and consumption of animal and autochthonous items varied between seasons. These results reinforce the idea that S. notomelas show trophic plasticity between seasons. KEYWORDS: Characidae, Trophic ecology, Igarapés, Ornamental fish, Amazon. Ecologia alimentar de Serrapinnus notomelas (Characiformes: Cheirodontinae) em igarapés da bacia do Rio Machado, Rondônia, Brasil RESUMOEstudos sobre a estrutura trófica de peixes dão informações sobre autoecologia espécies e seu papel no ecossistema. Os objetivos deste estudo foram caracterizar a dieta Serrapinnus notomelas em igarapés da bacia do rio Machado e avaliar o efeito da sazonalidade das chuvas. Os peixes foram coletados bimestralmente de julho 2013 a maio de 2014, com redes de arrasto e redes de mão. O comprimento de cada espécime foi medido para identificar a categoria das classes. Também foram medidos o grau de repleção e o volume de cada item ingerido, e estes dados foram combinadas para se obter um índice alimentar. Foram utilizados uma ANOVA e Kruskal-Wallis para diferenças entre classes de comprimento e graus de repleção, teste de qui-quadrado para detectar diferenças sazonais na origem dos alimentos e análise de escalonamento multidimensional não-métrico para examinar variação temporal na dieta. Nós encontramos que a maioria dos indivíduos eram maiores que 20 mm, apresentando distribuição polimodal. Para ambas as estações a maioria dos estômagos apresentaram-se cheios. Serrapinnus notomelas ingeriu itens vegetais e animais. Observamos maior consumo de macrófitas aquáticas e algas, sugerindo comportamento alimentar onívoro com tendência a herbivoria. Itens de origem vegetal e autóctone foram mais consumidos que os demais itens em ambas as estações, e o consumo de itens animais e itens autóctone...

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Feeding ecology of Serrapinnus notomelas (Characiformes: Cheirodontinae) in small forest streams in the Machado River basin, Rondônia, Brazil

Costa

Rocha

2017

Acta Amaz.

View full text Add to dashboard Cite

show abstract

“…In addition, these streams and their riparian areas are important parts of the carbon cycle in the Amazon Basin, as small streams can evade substantial quantities of CO 2 , especially when compared to fluxes measured for major Amazonian rivers, and thereby serve as an important carbon loss process by rainforests even beyond farming activities [23,24]. Moreover, riparian forests have been shown to benefit aquatic habitat, including for stream fish diversity [25] and for overall water quality for residents, who use water from springs and small streams for household and domestic uses or who may use rudimentary cesspits in the absence of sanitary sewers as this vegetation can capture these materials before they enter stream water [15].…”

Section: Watershed Biogeochemistry Affected By Small Farmingmentioning

confidence: 99%

Agricultural Impacts on Hydrobiogeochemical Cycling in the Amazon: Is There Any Solution?

Figueiredo

Cak

Markewitz

2020

Water

View full text Add to dashboard Cite

Expansion of agriculture in the Brazilian Amazon has been driven not just by demands from traditional, rural producers, but also large agriculture and cattle producers, both of whom have put considerable pressure on remaining forests and their watersheds. Monitoring of these watersheds has been a focus of intensive study for the past 20 years and although this work has greatly increased our understanding, considerable gaps still remain in our ability to provide adequate recommendations for land management and associated public policies. In this study we present a summary of findings from these previous results. For small properties, the use of fire to prepare land for cultivation remains controversial, while in large properties, forest conversion to pasture and/or crop production has had a meaningful and adverse effect on water quality. Riparian forest conservation can make a significant difference in reducing impacts of land-use change. Secondary vegetation can also play an important role in mitigating these impacts. New types of sustainable agricultural production systems, together with incentives such as payments for ecosystem service can also contribute. Continued monitoring of these changes, together with robust sustainable development plans, can help to preserve forest while still addressing the social and economic needs of Amazonian riverine inhabitants.

show abstract

“…Fish community studies in the eastern Amazonia have shown that agricultural catchments dominated by small farmer can also support reasonable stream fish diversity. After nine monthly collections, a study identified forty-three fish species in three streams of such agricultural catchments (Corrêa et al, 2012). Later, a more exhaustive collection effort in seven streams of the same agriculture region registered seventy-three species distributed in six orders, twenty six families and sixty three genera ( Figure 5) (Brejão, 2011).…”

Section: Slash-and-burnmentioning

confidence: 99%

Watershed services payments to smallholders in the Brazilian Amazon: challenges and perspectives

Figueiredo¹,

Börner²,

Davidson³

2013

Rev. ambiente água

Self Cite

View full text Add to dashboard Cite

Several hydrobiogeochemical research activities have been conducted in the Eastern Amazon, contributing to the understanding of how changes in forests and agro-ecosystems affect the provision of services to ecosystems. The findings have demonstrated that good agricultural practices and the presence of natural secondary vegetation favored by the management of small family farms are important factors for hydrobiogeochemical cycling, aquatic ecosystem conservation, soil conservation, and mitigation of trace gases emissions from biomass burning in Amazonian small catchments. Two challenges for watershed service management arise in this context. First, low population densities and the relatively flat landscape mean that a critical mass of downstream beneficiaries of such services - a prerequisite for public intervention is more difficult to identify than in more densely populated mountainous areas. Second, although watershed service providers (farmers) are also to a considerable extent service beneficiaries, conflicts over land and cultural heterogeneities among settlers inhibit local collective action to safeguard the quality of stream water. Including small landholders in carbon payment schemes that compensate for the maintenance of riverbank vegetation would appear to be a cost-effective means to secure watershed services as additional benefits of forest-based mitigation of climate change

show abstract

Ictiofauna de igarapes de pequenas bacias de drenagem em área agrícola do Nordeste Paraense, Amazonia Oriental

Cited by 10 publications

References 9 publications

Feeding ecology of Serrapinnus notomelas (Characiformes: Cheirodontinae) in small forest streams in the Machado River basin, Rondônia, Brazil

Feeding ecology of Serrapinnus notomelas (Characiformes: Cheirodontinae) in small forest streams in the Machado River basin, Rondônia, Brazil

Agricultural Impacts on Hydrobiogeochemical Cycling in the Amazon: Is There Any Solution?

Watershed services payments to smallholders in the Brazilian Amazon: challenges and perspectives

Contact Info

Product

Resources

About