Seasonality of energy sources of <i>Colossoma macropomum</i> in a floodplain lake in the Amazon – lake Camaleão, Amazonas, Brazil

Oliveira, A. C. B.; Martinelli, Luiz Antônio; Moreira, Marcelo Zacharias; Soares, Maria de Lourdes; Cyrino, José Eurico Possebon

doi:10.1111/j.1365-2400.2006.00481.x

Cited by 37 publications

(34 citation statements)

References 25 publications

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“…Colossoma exhibited an almost complete dietary shift from frugivory in the Xood season to detritivory as the Xood waters receded. Oliveira et al (2006) detected similar seasonal changes in Colossoma using stable isotope data; they noted that fruits and seeds were completely absent from the diet of Colossoma during the dry season. Thus, Colossoma, and presumably other Wsh, consume fruits only when they have access to seasonally Xooded habitats.…”

Section: Habitat Aynity Of Fruit-eating Wshesmentioning

confidence: 69%

High-quality seed dispersal by fruit-eating fishes in Amazonian floodplain habitats

Rojas²,

2009

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Seed dispersal is a critical stage in the life history of plants. It determines the initial pattern of juvenile distribution, and can influence community dynamics and the evolutionary trajectories of individual species. Vertebrate frugivores are the primary vector of seed dispersal in tropical forests; however, most studies of seed dispersal focus on birds, bats and monkeys. Nevertheless, South America harbors at least 200 species of frugivorous fishes, which move into temporarily flooded habitats during lengthy flood seasons and consume fruits that fall into the water; and yet, we know remarkably little about the quality of seed dispersal they effect. We investigated the seed dispersal activities of two species of large-bodied, commercially important fishes (Colossoma macropomum and Piaractus brachypomus, Characidae) over 3 years in Pacaya-Samiria National Reserve (Peru). We assessed the diet of these fishes during the flood season, conducted germination trials with seeds collected from digestive tracts, and quantified fruit availability. In the laboratory, we fed fruits to captive Colossoma, quantified the proportion of seeds defecated by adult and juvenile fish, and used these seeds in additional germination experiments. Our results indicate that Colossoma and Piaractus disperse large quantities of seeds from up to 35% of the trees and lianas that fruit during the flood season. Additionally, these seeds can germinate after floodwaters recede. Overexploitation has reduced the abundance of our focal fish species, as well as changed the age structure of populations. Moreover, older fish are more effective seed dispersers than smaller, juvenile fish. Overfishing, therefore, likely selects for the poorest seed dispersers, thus disrupting an ancient interaction between seeds and their dispersal agents.

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Section: Habitat Aynity Of Fruit-eating Wshesmentioning

confidence: 69%

High-quality seed dispersal by fruit-eating fishes in Amazonian floodplain habitats

Rojas²,

2009

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“…Plant material included in the models were forest fruits and leaves of 20 woody plant species (both tissues collected from the same individuals) (Appendix 2), leaves of four C 3 aquatic macrophyte species (N ¼ 8), leaves of a C 4 grass (N ¼ 2), and seston (N ¼ 1). These sources represent the main primary production sources in Amazonian floodplains (Benedito-Cecilio et al 2000, Oliveira et al 2006b). …”

Section: Statistical Analysesmentioning

confidence: 99%

Isotopic variation among Amazonian floodplain woody plants and implications for food-web research

Correa

Winemiller

2016

Biota Neotrop.

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Isotopic variation within food sources adds uncertainty to models intended to reconstruct trophic pathways. Understanding this variation is pivotal for planning sampling protocols for food-web research. This study investigates natural variation in C and N stable isotopes among plant species in two western Amazon flooded forests with contrasting watershed biogeochemistry (white-water vá rzea-forest and black-water igapó -forest 13 C values of leaves and fruits were not statistically different between the two sites despite regional differences in biogeochemistry and floristic composition. In contrast, mean d 15 N of leaves and fruits were significantly lower at the vá rzea than at the igapó site. The high floristic diversity of both forests was reflected in large within-site interspecific variation in both d 13 C and d 15 N. Paired comparisons revealed that d 13 C of wood and fruits and d 15 N of fruits were generally greater than values obtained for leaves from the same plant. The predicted contribution of different carbon sources to the consumer biomass changed between models as a function of source variability. We discuss implications of source variation for designing sampling protocols, interpreting isotopic signatures, and establishing trophic links between plants and consumers. Our findings highlight the importance of in situ sampling to establish reliable primary production baselines for local food webs. Keywords: Stable isotopes, Igapó, Várzea, Fruits, Food web, Mixing model. CORREA, S.B., WINEMILLER, K., CÁ RDENAS, D. Variación isotópica entre plantas leñosas de planicies de inundación del Amazonas e implicaciones para la investigación de red tróficas. Biota Neotropica. 16(2): e20150078. http://dx.doi.org/10.1590/1676-0611-BN-2015-0078Resumo: La variació n isotó pica dentro de fuentes alimenticias añ ade incertidumbre a los modelos destinados a reconstruir redes tró ficas. La comprensió n de esta variació n es fundamental para la planificació n de protocolos de muestreo para la investigació n de redes alimentarias. Este estudio investiga la variació n natural en isó topos estables de C y N entre especies de plantas en dos bosques inundables de la Amazonía noroccidental con biogeoquímica de cuenca contrastantes (vá rzea-bosques de aguas blanca e igapó -bosques de aguas negras). Nuestros objetivos fueron comparar las señ ales isotó picas de d 13 C y d 15 N de hojas y frutos entre bosques; evaluar la magnitud de la variació n en la composició n isotó pica de hojas (vá rzea: 28 spp., Igapó : 10 spp.) y frutas (vá rzea:. 22 spp, igapó : 22 spp.) a nivel local; determinar la variació n en la composició n isotó pica de madera, hojas y frutas dentro de una planta; y evaluar si la variació n inter-específica en los valores de d 13 C y d 15 N ejerce influencia sobre los resultados de modelos que predicen la contribució n de fuentes de alimentos terrestres a un consumidor acuá tico. Los valores promedio de d 13 C en hojas y frutos no fueron estadísticamente diferentes entre los dos tipos de bosque a pesar ...

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“…Como é de conhecimento que frutos de palmeiras fazem parte do hábito alimentar natural do tambaqui, é natural que a espécie aproveite muito bem o alto valor energético desses alimentos (Oliveira et al, 2006). Modificações nas fontes de energia dietética do tambaqui levam a mudanças na fisiologia e no metabolismo digestivo da espécie (Correa et al, 2007).…”

Section: Resultsunclassified

“…Por ser rústico e se alimentar na natureza de frutos de palmeiras, o tambaqui é uma espécie que, nutricionalmente, aproveita de modo satisfatório o coproduto citado (Oliveira et al, 2006). Entre as características de rusticidade da espécie está o fato de ela suportar ambientes eutrofizados e se desenvolver bem neles, como é próprio de açudes e barragens no semiárido (Campeche et al, 2009;Lima et al, 2009).…”

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Farelo de licuri em dietas para alevinos de tambaqui (Colossoma Macropomum, Cuvier, 1818)

Campeche

Melo

Balzana

et al. 2014

Arq. Bras. Med. Vet. Zootec.

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A busca de alimentos alternativos para a fabricação de ração para peixes tem se tornado constante. No entanto, é essencial que, além de ter ótimo aproveitamento pela espécie, este alimento esteja disponível ao longo do ano. Deste modo, o objetivo do presente trabalho foi avaliar o efeito da substituição do farelo de milho pelo farelo de licuri sobre o desempenho de alevinos de tambaqui. Três tratamentos de níveis de substituição de milho pelo farelo de licuri (33,33%; 66,66% e 100%) foram avaliados e comprados com a dieta controle. Os alevinos, com peso inicial médio de 3,18±0,5g, foram distribuídos em caixas de água de 250L, contendo cada uma, inicialmente, 16 animais. Os alevinos foram alimentados três vezes ao dia, a uma taxa de 5% da biomassa total, durante o período de 50 dias. A cada 10 dias eram realizadas biometrias. Ao final do experimento, foram avaliados parâmetros de desempenho zootécnico e foi feita avaliação bromatológica da carcaça. Não houve diferença significativa entre os tratamentos, para os parâmetros: peso final, ganho de peso, conversão alimentar, eficiência alimentar, sobrevivência e crescimento, somente para o consumo de ração, que foi significativamente menor quando houve 100% de substituição. Neste tratamento também houve maior porcentagem de proteína bruta e menor teor de extrato etéreo na carcaça.

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Seasonality of energy sources of Colossoma macropomum in a floodplain lake in the Amazon – lake Camaleão, Amazonas, Brazil

Cited by 37 publications

References 25 publications

High-quality seed dispersal by fruit-eating fishes in Amazonian floodplain habitats

High-quality seed dispersal by fruit-eating fishes in Amazonian floodplain habitats

Isotopic variation among Amazonian floodplain woody plants and implications for food-web research

Farelo de licuri em dietas para alevinos de tambaqui (Colossoma Macropomum, Cuvier, 1818)

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