Influence of feeding plasticity on the fitness of small Neotropical characids

Fiori, Leandro Fabrício; Alves, Gustavo Henrique Zaia; Hahn, Norma Segatti; Benedito, Evanilde

doi:10.1590/1678-4766e2016006

Cited by 11 publications

(12 citation statements)

References 29 publications

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“…The species grouped in the main cluster (cluster 1) were generalists, as is common for small fishes (Pelicice & Agostinho 2006, Fiori et al 2016, or piscivorous such as Hoplias malabaricus (Rodrigues et al 2017). Prochilodus brevis, a specialist detritivore (mud eaters - Silva et al 2010), occurred only in the lower and middle reaches of the basin.…”

Section: Discussionmentioning

confidence: 99%

Ichthyofauna of the Mamanguape river basin, Northeastern, Brazil

et al. 2018

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The Mamanguape River Basin is located in a peripheral semi-arid area of South America, with its headwaters and middle reaches running through the Caatinga (from wetter to drier) and its lower reaches through the Atlantic Forest. The objective of this study was to inventory the fish fauna of the Mamanguape river basin through a comprehensive sampling and to discuss its ichthyofaunal dominance pattern. Sampling was conducted between 2015 and 2016 at 38 points throughout. The main river course was sampled at 18 fixed points during two expeditions (dry and wet seasons) using traw nets, cast nets, and dip nets, with a standardized effort. The tributaries were sampled during the dry season at 20 points using an adaptaptation of the AquaRAP methodology. A total of 32 freshwater fish species belonging to 26 genera, 16 families and six orders were recorded, predominantly from the order Characiformes and the family Characidae. Astyanax fasciatus had widest distribution and greatest abundance in the basin. Siluriformes were the second most prevalent order, with five species recorded. Cichla cf. monoculus, Poecilia reticulata and Oreochromis niloticus were non-native records for the basin. Apareiodon davisi, an Endangered species, was recorded.

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Section: Discussionmentioning

confidence: 99%

Ichthyofauna of the Mamanguape river basin, Northeastern, Brazil

et al. 2018

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“…Due to their importance in the energy flow and nutrient cycling, small-sized fishes represent an indispensable link in the trophic chain of aquatic environments (Lowe-McConnell, 1999;Corrêa et al, 2009;Fiori et al, 2016). Among these species, there is Hemigrammus marginatus Ellis 1911, a small characid widely distributed in the Neotropical region, occurring in the basins of Guaporé, Orinoco, Amazonas, Paraná, Paraguai, and São Francisco rivers, as well as in some rivers of the Brazilian Northeast (e.g.…”

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Diet of Hemigrammus marginatus (Characiformes: Characidae) in the Upper Contas River, Diamantina Plateau (Bahia, Brazil)

Barreto

Silva

Souza

et al. 2018

Iheringia, Sér. Zool.

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Studies on the composition of fish diet and on how species exploit food resources are especially relevant in tropical freshwater systems, where dietary plasticity is a commonly used strategy. In this study, we analysed the food spectrum and the environmental, seasonal and ontogenetic variations in the diet of a characid species [Hemigrammus marginatus Ellis, 1911 (Characidae)] in the region of the Upper Contas River, in the Diamantina Plateau, Brazil. We verified an omnivorous/invertivorous and opportunistic food habit, with predominance of insects and microcrustaceans, followed by filamentous algae. Seasonality did not alter the food resources used by the species. However, differences were detected in the dominant categories when comparing the two sampled rivers, as well as in the food consumption throughout the development of the species. These data increase the knowledge about the biology of H. marginatus and allow understanding the influence of the characteristics of the rivers and their surroundings in the trophic ecology of the species, as our findings have shown that, although insects have been expressive in both studied localities, microcrustaceans exhibit a greater relative importance in the more lentic environment, which is probably related to the variation in the availability of these resources in the environment.

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“…The presence of recorded plant items for K. heteresthes and M. lepidura on the Teles Pires River is commonly observed for omnivorous Characiformes in other environments (Santos et al, 2009;Schneider et al, 2011;Costa and Rocha, 2017). These items seem to be a good nutritional alternative, because despite the low protein source, according to Fiori et al (2016) these physiological adaptations allow the maximum attainment of energy from the food source. Alternatively, according to Bowen et al (1995), the reduction of the energy rate can be compensated by the increase in consumption of these items.…”

Section: Discussionmentioning

confidence: 90%

Feeding aspects of Knodus heteresthes (Eigenmann, 1908) and Moenkhausia lepidura (Kner, 1858) (Characiformes, Characidae) in the Teles Pires and Juruena Rivers, southern Amazon

et al. 2021

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The composition of the diet of two species of characids (Knodus heteresthes and Moenkhausia lepidura) was evaluated in the Teles Pires and Juruena Rivers, sampled in September and October 2016. We analyzed 226 stomachs of K. heteresthes and 425 of M. lepidura. The analysis of the stomach contents was based on volumetric and frequency of occurrence methods, applying the food importance index. For the similarity of the diets between the species we calculated the niche overlap with Pianka’s index. Both species in the Juruena River have a dietary preference for arthropods (IAi > 0.95). In the Teles Pires River the diet is concentrated in three sources for both species: arthropods (IAi > 0.52), vegetables (IAi > 0.33) and fish (IAi > 0.12). The diet was dissimilar when compared to environments (ANOSIM, R ≥ 0.57, p < 0.001) with high trophic niche overlap (α > 0.97), regardless of the sampled environment. In the Teles Pires River, both species were classified as omnivorous with an insectivorous tendency and in the Juruena River the insectivorous behaviour occurs.

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Influence of feeding plasticity on the fitness of small Neotropical characids

Cited by 11 publications

References 29 publications

Ichthyofauna of the Mamanguape river basin, Northeastern, Brazil

Ichthyofauna of the Mamanguape river basin, Northeastern, Brazil

Diet of Hemigrammus marginatus (Characiformes: Characidae) in the Upper Contas River, Diamantina Plateau (Bahia, Brazil)

Feeding aspects of Knodus heteresthes (Eigenmann, 1908) and Moenkhausia lepidura (Kner, 1858) (Characiformes, Characidae) in the Teles Pires and Juruena Rivers, southern Amazon

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