Ecomorphological relationships among four Characiformes fish species in a tropical reservoir in South-eastern Brazil

Silva-Camacho, Débora de S.; Santos, J. C. dos; Gomes, Rafaela de S.; Araújo, Francisco Gerson

doi:10.1590/s1984-46702014000100004

Cited by 10 publications

(6 citation statements)

References 44 publications

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“…This resource sharing represent a situation commonly found in tropical streams (Aranha et al, 1998;Casatti, 2002). A previous study at Lajes Reservoir also revealed high trophic niche overlap of Astyanax species and suggested ecomorphological differences as a way to probably decrease competition (Silva-Camacho et al, 2014).…”

Section: Discussionsupporting

confidence: 61%

See 1 more Smart Citation

Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs

Lopes

Nessimian

Da-Silva

et al. 2016

Iheringia, Sér. Zool.

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ABSTRACT. Food fl exibility and omnivory are important features pronounced in Neotropical freshwater fi sh species, particularly for Astyanax species. Traditionally most fi sh diet resources are known to be originated in the aquatic environment, however recent studies have pointed to the importance of allochthonous sources. Besides, the colonization of macrophytes, common at several tropical reservoirs, may enhance insectivory in fi sh diet expanding or concentrating the area of available resources for feeding. Here we employed stomach contents analysis of two sympatric Astyanax species to access the importance of habitat diff erentiations as spatial complexity in two tropical reservoirs with diff erent environmental features. The NMDS analysis indicated separation in the diet of these species between reservoirs (Stress= 8.28%). Additionally, analysis of variance revealed a signifi cative diff erence in the volume of food itens ingested between the reservoirs (Anova one-way F(1, 132)=4.4446; p= 0.037). This points out the importance of environmental conditions on the composition of the diet of fi shes. This study highlighted the insectivorous feeding habit of Astyanax species and revealed diff erent feeding strategies between sympatric fi shes despite high niche overlap in both environments. Habitat heterogeneity increasing food resources availability plays an important role in the diet strategy of these Astyanax species and on their constant maintenance in the two diff erent reservoirs.KEYWORDS. Feeding resources, land-water ecotone, trophic ecology, Astyanax aff . bimaculatus, Astyanax parahybae. RESUMO. Heterogeneidade de habitat no hábito alimentar de duas espécies simpátricas e congenéricas de peixes caracídeos em dois reservatórios tropicais.A fl exibilidade alimentar e onivoria são características das espécies de peixes de água doce neotropicais, especialmente em espécies de Astyanax. Tradicionalmente a maioria dos recursos na dieta de peixes é reconhecidamente originária do ambiente aquático, porém estudos recentes têm apontado para a importância das fontes alóctones. Além disso, a colonização de macrófi tas, comuns em vários reservatórios tropicais, pode melhorar os aspectos de insetivoria na dieta dos peixes expandindo ou concentrando a área disponível para a alimentação. Aqui analisamos o conteúdo estomacal de duas espécies de Astyanax simpátricas para avaliar a importância das diferenças de habitats, como a complexidade espacial, em dois reservatórios tropicais com diferentes características ambientais. A análise NMDS indicou separação na dieta destas espécies entre reservatórios (stress = 8.28%). Além disso, a análise de variância revelou uma diferença signifi cativa no volume de itens alimentares consumidos entre os reservatórios (Anova one-way F (1. 132) = 4,4446; p = 0.037), salientando a importância das condições ambientais na composição da dieta de peixes. O estudo destacou o hábito alimentar insetívoro das espécies de Astyanax e revelou diferentes estratégias de alimentação entre esses peixes ...

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Section: Discussionsupporting

confidence: 61%

“…These findings may indicate that A. aff. bimaculatus are better adapted to lentic environments (Silva-Camacho et al, 2014). Also, this can show some strategy to avoid diret competition between these species at Lajes Reservoir.…”

Section: Discussionmentioning

confidence: 92%

Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs

Lopes

Nessimian

Da-Silva

et al. 2016

Iheringia, Sér. Zool.

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show abstract

“…The ecomorphological attributes-based analyses also discriminates groups, but this discrimination does not exhibit a clear relationship with diet, and thus suggests that fish assemblages are more influenced by spatial structure than by trophic structure (Silva-Camacho et al 2014). Previously published studies in this area exploring the relationship between fish morphology and diet have also proven inconclusive (Felley 1984, Douglas & Matthews 1992, Teixeira & Bennemann 2007.…”

Section: Discussionmentioning

confidence: 91%

“…Previously published studies in this area exploring the relationship between fish morphology and diet have also proven inconclusive (Felley 1984, Douglas & Matthews 1992, Teixeira & Bennemann 2007. While some studies found close associations (Sampaio et al 2013, Prado et al 2016, others found no relationship (Felley 1984, Motta et al 1995, Silva-Camacho et al 2014. Conceptually, it could be assumed that when a relationship between morphology and diet is observed, the fish assemblage is ecomorphologically structured (Douglas & Matthews 1992, Breda et al 2005, Oliveira et al 2010.…”

Section: Discussionmentioning

confidence: 99%

Diet and ecomorphology of predator fish species of the Amazonian floodplain lakes

et al. 2019

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Amazonian floodplain lakes host a high diversity of predatory fish which coexist and exploit the high diversity of available prey. Morphology could be the characteristic most closely associated with their preferred feeding sources (prey). However, it is unclear whether this association is direct or indirect. If it is indirect, swimming performance or preferential position in the water column could be the most evident characteristic. To examine the degree to which fish morphology of predator fish species is correlated to their dietary inputs, we compared the existence of morphological and feeding dissimilarity among eight predator species with the association between predator morphologies and preferred prey. We collected, measured, and sampled the stomach contents of fish from two lowland floodplain lakes associated with the Solimões River, Brazil, in May, August, and November of 2014. Of 187 collected fish across eight species, five species showed fish to be the most important item in their diets and three preferentially ate shrimp. Principal components analyses of ecomorphological attributes divided the species according to their ability to find the prey, swimming performance of the predator, and prey size. While there was significant distinction between the varying morphologies of predators, we were unable to distinguish between the specific diet of these species and did not find a correlation between morphology and feeding. These results are likely due to the fact that there is great abundance and diversity of available prey in the Amazonian floodplain lakes, so opportunistic feeding may be the primary foraging strategy of predator fish species living in these environments.

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“…Nevertheless, most fish, for example, rainbow trout ( Oncorhynchus mykiss ), Astyanax parahybae and Oligosarcus hepsetus , have wide mouths to inhale insects (Gerking ; Silva‐Camacho et al . ). Another important adaptation is the digestive tract systems of carnivorous and omnivorous fish; the gastrointestinal tracts (GIT) of many fish have chitinase to aid in insect consumption.…”

Section: Insects As Natural Fish Preymentioning

confidence: 97%

Insect meals in fish nutrition

Nogales‐Mérida¹,

Gobbi²,

Józefiak

et al. 2018

Reviews in Aquaculture

215

178

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Different studies have shown that insect meals can partially or completely replace the fish and soya bean meals that are commonly used in aquaculture. However, information is lacking on the amino acid and fatty acid contents and digestibility of different insect meals. Moreover, we evaluated different proportions of insect diets and determined how these affected the nutritional values of insect meals. Our purpose was to clarify these aspects and consider the availability of protein, amino acids, lipids and fatty acids in insect meals in fish nutrition. Generally, insect meals have higher indispensable amino acid contents than other meal types, with contents closely related to those in fish meal. Insect meal can be an important source of essential amino acids such as methionine, with contents ranging between 0.47 and 4.03 g 100 g À1 sample. These values are higher than those reported for other animal and plant meals. In addition, insects are also good sources of lipids and fatty acids, and the amounts and types of fatty acids vary according to the species, stage of development and type of feed. Moreover, the additional nutritional value of insect meal includes compounds such as chitin, which is primarily considered a fibre but also contains nitrogen and amino acids. Insect peptides with activity against pathogenic microflora provide secondary biological effects, which may significantly improve animal health.

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Ecomorphological relationships among four Characiformes fish species in a tropical reservoir in South-eastern Brazil

Cited by 10 publications

References 44 publications

Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs

Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs

Diet and ecomorphology of predator fish species of the Amazonian floodplain lakes

Insect meals in fish nutrition

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