Seasonal and ontogenetic variations in the diet of Cichla kelberi Kullander and Ferreira, 2006 introduced in an artificial lake in southeastern Brazil

Gomiero, Leandro Muller; Villares, GA; Naous, Felipe

doi:10.1590/s1519-69842010000500017

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…As observed in this study, the occurrence of ingestion of its congeners has already been reported as an indication of cannibalism (Dourado et al, 2015;Krinski, 2010;Rocha et al, 2011), the same pattern of cannibalism was found by Gomiero et al (2010) for another predatory fish species, Cichla kelberi, introduced in an artificial lake in southeastern Brazil. In the Pantanal of Mato Grosso, Brazil, Lipparelli (1999) demonstrated that, during the rainy season, there is an increase in the turbidity of the water, causing a decrease in visibility by the predator and the capture of individuals of the same species may occur.…”

Section: Discussionsupporting

confidence: 84%

Trophic ecology of Acestrorhynchus falcirostris Cuvier, 1819 in island lakes on the lower stretch of the Solimões River, Amazon Basin

et al. 2024

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The aim objective of this study was to determine the trophic ecology of juvenile and adult Acestrorhynchus falcirostris during the rising and flood (high-water) period in six island lakes adjacent to the Solimões River. As such, we investigated: i) the trophic position, through the fractional trophic niche; ii) the niche breadth; iii) niche overlap and iv) the food strategy of the species. The specimens were collected during the years 2014 to 2017, using gillnets with mesh sizes ranging from 30 to 120mm between opposite knots. Through the analysis of stomach contents, the preference in the consumption of items of animal origin was observed. Juveniles consumed insects in greater proportions (IAi% = 50%), while adults consumed fish (IAi%=99,98%). Despite the large supply of food items available in the high-water period, juveniles were the only ones to consume items of allochthonous origin, such as insects. Juveniles presented a different dietary strategy and dietary composition to adults. Juveniles were omnivores with a generalist strategy, while adults were piscivores with a specialist strategy. Thus, the food composition, niche breadth, trophic position and feeding strategy of Acestrorhynchus falcirostris change due to the stage of development.

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Section: Discussionsupporting

confidence: 84%

Trophic ecology of Acestrorhynchus falcirostris Cuvier, 1819 in island lakes on the lower stretch of the Solimões River, Amazon Basin

et al. 2024

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“…Therefore, this characteristic of A. crassipinnis may be one that may have favored its establishment in the upper Paraná River floodplain. The same pattern was observed for Cichla kelberi Kullander, Ferreira, 2006(Gomiero et al, 2010 and Serrasalmus marginatus (Alves et al, 2021), two other piscivorous fish species introduced in the study area.…”

Section: Discussionsupporting

confidence: 77%

Feeding strategy of the introduced Astronotus crassipinnis (Cichlidae) in upper Paraná river floodplain

Lopes

Ganassin

Oliveira

et al. 2022

Iheringia, Sér. Zool.

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The cichlid Astronotus crassipinnis (Heckel, 1840) known as “oscar” or “apaiari” is native to the Amazon basin and presents an omnivorous feeding habit, with a tendency to carnivory. The species was introduced in the upper Paraná River floodplain, where the trophic strategies adopted by the species are not well-known. The objective of this study was to characterize the diet of A. crassipinnis in different size classes to identify ontogenetic differences in diet composition and to determine its feeding behavior in the invaded floodplain. In addition, we experimentally compared the feeding behavior of A. crassipinnis with Hoplias sp. 2, a native piscivorous. We evaluated the predation rate of the two species with different prey (fish and shrimp). Astronotus crassipinnis consumed items from several trophic levels in the juvenile stage, characterizing an omnivore feeding. In the adult stage, A. crassipinnis displayed a specialist strategy in which fish and mollusks dominated the diet. Under controlled conditions, A. crassipinnis consumed more shrimp than Hoplias sp. 2. The preference for shrimp during the experiment contrasted to its feeding in natural environments, showing the potential trophic plasticity of A. crassipinnis. The piscivorous habit in the invaded environment can be considered a trophic strategy of A. crassipinnis, which feeds on an abundant resource in the upper Paraná River floodplain. In conclusion, the ontogenetic diet shifts and the trophic opportunism of the carnivore adults can be the strategies used by the species to invade and settle the floodplain. The piscivorous strategy of A. crassipinnis may impact fish biodiversity, altering ecosystem functioning.

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“…Speciation in these regions often depends on factors such as niche opportunities, migratory constraints, and intricate species interactions (Garcia et al, 2020;Melo et al, 2021). Niche partitioning, as a consequence of diversification, can alleviate interspecific and intraspecific competition across trophic (Brandão-Gonçalves and Sebastien, 2013;Lubich et al, 2022), spatial or temporal niches (Gomiero et al, 2010), and is often mirrored in morphological characteristics of species (Garcia et al, 2020). dynamics of these species, ultimately contributing to the formulation of essential conservation measures necessary to address ongoing environmental changes.…”

Section: Introductionmentioning

confidence: 99%

Characterizing functional morphology and trophic niches in a neotropical Characiforms (Actinopterygii: Teleostei) assemblage in middle Munim River basin, Maranhão, Brazil

Oliveira,

South,

Guimarães

et al. 2024

Braz. J. Biol.

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Understanding how functionally similar species segregate resources to minimize competition is vital for predicting evolutionary factors and patterns of coexistence. We conducted a study in Mata de Itamacaoca, in the middle Munim River basin, Maranhão, northeastern Brazil, to characterize the functional morphology and trophic niches of five coexisting Characiform species in this area - including a recently described species, and to investigate whether their functional morphology is a key determinant of their trophic niches. Our analysis of functional morphology and diet, employing linear measurements to predict dietary specializations, showed that these species are predominantly generalist insectivores with a significant morphological overlap. This study underscores the influence of species' natural history on their ecological characteristics, contributing to more effective conservation strategies.

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Seasonal and ontogenetic variations in the diet of Cichla kelberi Kullander and Ferreira, 2006 introduced in an artificial lake in southeastern Brazil

Cited by 6 publications

References 10 publications

Trophic ecology of Acestrorhynchus falcirostris Cuvier, 1819 in island lakes on the lower stretch of the Solimões River, Amazon Basin

Trophic ecology of Acestrorhynchus falcirostris Cuvier, 1819 in island lakes on the lower stretch of the Solimões River, Amazon Basin

Feeding strategy of the introduced Astronotus crassipinnis (Cichlidae) in upper Paraná river floodplain

Characterizing functional morphology and trophic niches in a neotropical Characiforms (Actinopterygii: Teleostei) assemblage in middle Munim River basin, Maranhão, Brazil

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