Use of food resources by small fish species in Neotropical rivers: responses to spatial and temporal variations

Silva, Jislaine Cristina da; Gubiani, Éder André; Delariva, Rosilene Luciana

doi:10.1590/s1984-46702014000500004

Cited by 14 publications

(13 citation statements)

References 55 publications

(31 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many studies report omnivory and high degrees of opportunistic diets for the genera studied here (Bonato et al ., ; Delariva et al ., ; Silva et al ., ). González‐Bergonzoni et al .…”

Section: Discussionsupporting

confidence: 89%

“…Many studies report omnivory and high degrees of opportunistic diets for the genera studied here (Bonato et al, 2017;Delariva et al, 2013;Silva et al, 2014). González-Bergonzoni et al (2012) associate the dominance of omnivores with a high abundance of primary producers and with higher temperatures towards the tropics.…”

Section: Discussionmentioning

confidence: 93%

“…Tropical-subtropical environments follow patterns of seasonal variation and consequently can induce variations in fish diet (Lowe-McConnel, 1999;Prejs & Prejs 1987). The main factors influencing the seasonal variations in these environments are related mainly to the rainfall that affects the transportation of materials and changes in the substratum structure (Lowe-McConnel, 1999;Silva et al, 2014;Winemiller & Pianka, 1990). The influence of rainfall is documented in the floodplains of rivers, where there is a clear difference between dry and rainy periods caused by flood pulses (Carniatto et al, 2012;Quirino et al, 2015Quirino et al, , 2017.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Is resource partitioning the key? The role of intra‐interspecific variation in coexistence among five small endemic fish species (Characidae) in subtropical rivers

Neves

Silva

Baumgartner

et al. 2018

Journal of Fish Biology

View full text Add to dashboard Cite

This study focused on intra and interspecific variations in the diet of small species in the Pelotas River, upper Uruguay River ecoregion. We tested the hypothesis that five small characids coexist via resource partitioning. Samplings were performed quarterly between August 2013 and May 2014 at 14 sites in the Pelotas River basin, using gillnets of different mesh sizes, seines, cast nets and electrofishing. In this study, the contents of 1,253 stomachs were analysed from Astyanax dissensus, A. paris, A. saguazu, A. xiru and Bryconamericus patriciae. The main food resources consumed were aquatic insects, leaves, seeds and detritus. There were significant seasonal intra and interspecific variations in the use of food resources by the five species. Permutational analysis of multivariate dispersions results indicated significant differences in individual intraspecific variability between the sampled periods, with the highest values found in November and February because of an increase in allochthonous resources (leaves and seeds). Besides this, significant differences in the proportions of consumption of allochthonous and autochthonous were observed. The trophic niche breadth was significantly different among the species, such that in August, the species had narrower niche breadths. In the other periods, the highest niche breadth values were due to an increase in the consumption of allochthonous items. Diet overlap was low (< 0.4) between 62% of the species pairs. The small characid species showed pronounced changes in resource use and intra and interspecific variations indicating resource partitioning. These factors appear to be essential in species interactions and for coexistence.

show abstract

“…Many studies report omnivory and high degrees of opportunistic diets for the genera studied here (Bonato et al ., ; Delariva et al ., ; Silva et al ., ). González‐Bergonzoni et al .…”

Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Is resource partitioning the key? The role of intra‐interspecific variation in coexistence among five small endemic fish species (Characidae) in subtropical rivers

Neves

Silva

Baumgartner

et al. 2018

Journal of Fish Biology

View full text Add to dashboard Cite

show abstract

“…In addition, fish of the family Characidae exhibit many diverse trophic modes (Hyatt, 1979). The genera Astyanax and Bryconamericus (“lambaris”; genera incertae sedis in Characidae) (Lima et al, 2003) form one of the fish clades most abundant in which dietary plasticity has been particularly well documented by previous studies (Bonato, Burress, Fialho, & Armbruster, 2018; Delariva, Hahn, & Kashiwaqui, 2013; Kokubun, Bonato, Burress, & Fialho, 2018; Oricolli & Bennemann, 2006; Pini et al, 2019; Portella, Lobón‐Cerviá, Manna, Bergallo, & Mazzoni, 2017; Silva, Gubiani, Neves, & Delariva, 2017) and has also been associated with the exploitation of alternative and seasonally varying resources in tropical systems (Neves et al, 2018; Silva, Gubiani, & Delariva, 2014).…”

Section: Introductionmentioning

confidence: 99%

Morphological traits correlated with resource partitioning among small characin fish species coexisting in a Neotropical river

Delariva

Neves

2020

Ecology of Freshwater Fish

Self Cite

View full text Add to dashboard Cite

Body shape variation should play a central role in determining the feeding ability of a fish species. We tested whether variations in feeding resource use of sympatric and closely related fish species could be explained by differences in ecologically relevant metrics, such as body morphology, trophic apparatus or combinations thereof. Fish were sampled at 14 sampling sites from Pelotas River and tributaries, Upper Uruguay, Brazil. The stomach contents of five species of Characidae (Astyanax and Bryconamericus) were analysed by the volumetric method. A geometric morphometric approach was used together with internal morphological traits to predict their patterns of prey use. Significant differences in body depth, snout and caudal peduncle lengths were found. Concomitant pronounced variations were verified to occur among species in structures related to digestion and absorption. Increased numbers of cusps, more pyloric caeca and higher intestinal coefficient values were observed in species that consumed greater proportions of plants. The opposite trends occurred in species that consumed greater proportions of insects. Mixed linear models indicated that the characin species differed significantly in the use of algae, aquatic insects, terrestrial insects, plant remains/seeds and detritus. Dietary differences reflected in low trophic niche overlap. Partial least squares regression results indicated strong correlations between morphological divergences and the corresponding variations in species diet. These outcomes combined confirm that the morphological traits that best enables the exploration of certain resource were an important factor in the resource‐related divergence and were the underlying reasons for these species' respective feeding modes.

show abstract

“…The use of trophic resources by fish is greatly affected by temporal and spatial variation in food resources (Abelha et al 2001;Silva et al 2014;Peterson et al 2017). Major examples are seasonal reproductive flights of winged ants and mayflies, or the fruitification of plants in marginal vegetation, which module the consumption of prey by numerous fish species (Netto-Ferreira et al 2007;Correa and Winemiller 2014;Barbosa et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Do local environmental factors structure the trophic niche of the splash tetra, Copella arnoldi? A test in an Amazonian stream system

et al. 2020

View full text Add to dashboard Cite

Environmental variation affects the availability of spatial and trophic resources in Amazonian streams and may be important factors structuring the diet of fishes. We analyzed the diet composition and trophic niche breadth of the lebiasinid splash tetra, Copella arnoldi, aiming to evaluate how environmental variation in Amazonian streams affects the species' trophic niche. Fish were captured and environmental factors were recorded in 20 streams in the Caxiuanã National Forest, in the eastern Amazon, in November 2010. We made a semi-quantitative analysis of stomach contents of 200 individuals. Copella arnoldi exhibited an omnivorous diet composed mainly by detritus and allochthonous invertebrates. Environmental variation (stream width, stream depth, canopy cover and flow) did not affect the diet composition or trophic niche breadth of the species, possibly due to the regional integrity of the forest within the boundaries of the protected area. Riparian cover probably minimizes the effect of the small-scale variations in food resources, thus leading to a locally homogeneous diet composition in the splash tetra C. arnoldi. Fatores ambientais influenciam o nicho trófico do tetra Copella arnoldi?Um teste em um sistema lótico amazônico RESUMO Variações ambientais afetam a disponibilidade de recursos espaciais e tróficos em igarapés amazônicos e podem ser fatores importantes estruturando a dieta de peixes. Analisamos a composição da dieta e a amplitude de nicho trófico do lebiasinídeo Copella arnoldi, tendo como objetivo avaliar como a variação ambiental em igarapés amazônicos afeta o nicho trófico da espécie. Indivíduos foram capturados e fatores ambientais foram medidos em 20 igarapés da Floresta Nacional de Caxiuanã, na Amazônia Oriental, em Novembro de 2010. Fizemos uma análise semi-quantitativa do conteúdo estomacal de 200 indivíduos. Copella arnoldi apresentou uma dieta onívora composta predominantemente por detritos e invertebrados alóctones. A variação ambiental (largura e profundidade do igarapé, cobertura de dossel e correnteza) não afetaram a composição da dieta ou a amplitude de nicho trófico da espécie, possivelmente devido à integridade regional da floresta na área protegida. A cobertura ripária provavelmente minimiza os efeitos da variação ambiental nos recursos tróficos, levando, assim, a uma dieta localmente homogênea de C. arnoldi. PALAVRAS-CHAVE: amplitude de nicho, ecologia trófica, Lebiasinidae, variação ambiental, Amazônia brasileira CITE AS: Soares, B.E.; Benone, N.L.; Rosa, D.C.O.; Montag, L.F.A. 2020. Do local environmental factors structure the trophic niche of the splash tetra, Copella arnoldi? A test in an Amazonian stream system. Acta Amazonica 50: 54-60.

show abstract

Use of food resources by small fish species in Neotropical rivers: responses to spatial and temporal variations

Cited by 14 publications

References 55 publications

Is resource partitioning the key? The role of intra‐interspecific variation in coexistence among five small endemic fish species (Characidae) in subtropical rivers

Is resource partitioning the key? The role of intra‐interspecific variation in coexistence among five small endemic fish species (Characidae) in subtropical rivers

Morphological traits correlated with resource partitioning among small characin fish species coexisting in a Neotropical river

Do local environmental factors structure the trophic niche of the splash tetra, Copella arnoldi? A test in an Amazonian stream system

Contact Info

Product

Resources

About