Ecologia Trófica De Peixes De Riacho: Uma Releitura 20 Anos Depois

Abstract

The great extent and diversity of ecological conditions of stream ecosystems in Brazil are widely recognized. In the last two decades, studies on stream fishes have contributed to the knowledge about their trophic ecology. However, the large amount of available information is yet fragmented. This chapter presents the state of the art of studies about feeding and trophic ecology of stream fishes in Brazil, an essential topic to understand ecosystem functioning. The review presented here was based on searches on different databases (Scopus, Web of Science, ASFA and Scielo). Results included studies that used different methods and approaches to evaluate the diet of fish species and assemblages, their relationship with morphology and ontogenetic variation, resource partitioning, seasonal and spatial variations, and anthropic impacts on trophic interactions. Finally, knowledge gaps and perspectives for future studies on fish trophic ecology are pointed out, including responses to anthropic influences, theoretical aspects, and the use of underexplored approaches to the subject, which may aid to our understanding of tropical streams

Diet composition of a native fish species in a neotropical lentic environment

“…Feeding habits can be related to the morphology of the mouth, limiting food items that can be consumed (Esteves et al, 2021). Hoplosternum littorale has a sub-inferior mouth and a body covered by bone plates that are ventrally flattened (Hahn, Almeida, & Luz, 1997).…”

“…Considering the wide distribution of H. littorale, its feeding habits, its opportunistic character, and since the feeding behavior of fish can change according to its environment, studies that evaluate diets are relevant for understanding the relationships between species and habitats (Esteves, Aranha, & Albrecht, 2021). Furthermore, knowledge on the biological aspects of native species is fundamental for understanding the trophic dynamics in their natural aquatic environments (Santos, Oliveira, & Moralles, 2009).…”

“…Furthermore, knowledge on the biological aspects of native species is fundamental for understanding the trophic dynamics in their natural aquatic environments (Santos, Oliveira, & Moralles, 2009). Thus, these studies, in addition to providing information on diets, allow us to understand the behavior of fish in the face of environmental variations in food availability (Esteves et al, 2021;Gerking, 1994) offering necessary information for preserving natural environments (Adam, Burkepile, & Ruttenberg, 2015;Barros, Almeida, Figueiredo, Nunes, & Neta, 2021). We, therefore, sought to characterize the diet composition, feeding habits, and trophic niche breadth of H. littorale in Neotropical lentic environments.…”

A Influência De Filtros Ambientais Locais Na Ictiofauna De Riachos Intermitentes

“…Além disso, a estrutura da ictiofauna varia ao longo do curso de água por conta da diversidade de habitat que favorece a disponibilidade de recursos e abrigo, permitindo a coexistência das espécies (Winemiller;Agostinho;Caramaschi, 2018;Esteves;Aranha;Albrecht, 2021;Mouillot et al, 2013;Violle et al, 2014). Deste modo, a heterogeneidade ambiental influencia na distribuição, abundância, riqueza e composição de espécies (Townsend;Hildrew 1994;Araújo;Pinto;Teixeira, 2008).…”

Rio dos Bois: contribuições para a ictiofauna nas cabeceiras da bacia do rio Araguaia, Noroeste do Goiás, Brasil

“…In recent years, scientists and environmental managers have recognized ichthyic communities as an integrating index of a complex set of physical and biological conditions of water bodies, that is, fish are indicators of the biotic integrity of lakes, reservoirs, streams, rivers, streams, etc. Research shows that fish exert great control over populations of other organisms, including vegetation, aquatic macroinvertebrates, plankton, and even nutrient cycling and sediment resuspension (Esteves et al 2021).…”