Diet and feeding daily rhythm of Pimelodella lateristriga (Osteichthyes, Siluriformes) in a coastal stream from Serra do Mar - RJ

Mazzoni, Rosana; Moraes, Maíra; Rezende, Carla Ferreira; Iglesias-Rios, Ricardo

doi:10.1590/s1519-69842010000500031

Cited by 6 publications

(4 citation statements)

References 31 publications

(29 reference statements)

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“…In the study area, apart from the seasonal changes in water temperature and photoperiod, the occurrence of summer spates are probably the most typical environmental factor affecting resources as food availability (Súarez, 2008;Mazzoni and Rezende, 2009;Mazzoni et al, 2010a;Mazzoni et al, 2010b). The presence of plant matter was the only seasonal difference in the diet of both Characidium species and probably resulted from changes in plant availability owing to environmental changes associated with seasonality.…”

Section: Discussionmentioning

confidence: 98%

Niche enlargement as a consequence of co-existence: a case study

Mazzoni

Rezende

et al. 2012

Braz. J. Biol.

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Spatio-temporal changes in the diet, niche breadth and niche overlap of two species of Characidium from three different sites along a Neotropical coastal stream were studied during a dry and rainy season. Seasonal changes were restricted to the occurrence of plant items in the stomach contents. The relative importance of food items in the diet of both species varied across sites, but Diptera, Ephemeroptera, Simuliidae, Trichoptera and Coleoptera larvae were always the main prey items. Contrary to the expected pattern, values of the niche breadth were higher at the site where Characidium species co-existed and niche overlapped at this site indicated 52% (p = 0.52) of feeding overlap.Keywords: neotropical characidae, coastal stream, close related species. Ampliação do nicho como consequência da co-existência: um estudo de caso ResumoVariações espaço-temporal na dieta, na amplitude e na sobreposição de nicho foram estudadas para duas espécies de Characidium de três localidades distintas de um riacho costeiro da região Neotropical, considerando-se as estações seca e chuvosa. As alterações sazonais na dieta foram restritas à presença/ausência de itens vegetais nos conteúdos estomacais. A importância relativa dos itens alimentares, de ambas as espécies, variou entre as localidades de estudo; porém, as larvas de Diptera, Ephemeroptera, Simuliidae, Trichoptera e Coleoptera foram sempre as presas mais consumidas. Em oposição ao padrão esperado, os valores de amplitude de nicho foram maiores na localidade em que as duas espécies de Characidium ocorreram em sintopia e a sobreposição de nicho, nessa localidade, indicou 52% (p = 0,52) de sobreposição alimentar.Palavras-chave: characidae neotropical, riachos costeiros, espécies relacionadas.

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Section: Discussionmentioning

confidence: 98%

Niche enlargement as a consequence of co-existence: a case study

Mazzoni

Rezende

et al. 2012

Braz. J. Biol.

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“…The studies on fish feeding make it possible to apply to either isolated species or to pairs of species, as well as to more complex population and communities (Velludo 2007). The description of the food items consumed by all fish species in a community is the starting point for the recognition of a natural trophic structure (Mazzoni et al 2010). It is necessary to know the trophic spectrum and the food activity of the species in their environment to achieve success in conservation efforts (Lima and Behr 2010).…”

Section: Introductionmentioning

confidence: 99%

Feeding patterns, trophic structure and damming rivers effect: studies applied in freshwater environments in the Brazilian semi-arid region

Oliveira

Nascimento

et al. 2018

JABB

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The knowledge of the fish trophic structure has been outstanding for providing relevant information on the functioning of the ecosystem in which they are inserted, mainly in dammed environments of semiarid regions that suffer constant changes in the level of water, resulting in alterations, especially in the feeding of the fish due to the variation of the food resources throughout the year, causing changes in the diet of the local ichthyofauna. Within this context, the objective was to describe the trophic categories of fish species in freshwater environments of the Rio Grande do Norte state. Seven trophic guilds were recorded: Detritivore/iliophagous, Insectivorous, Carcinophagous, Piscivorous, Herbivorous and Omnivorous. Through the results, it is observed that the fish species inserted in different environments of the state present the same food pattern, demonstrating flexibility on the diet, prevailing a generalist alimentary habit.

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“…Species composing the fish assemblages of these systems have variable feeding tactics and no significant trophic specializations (Esteves & Aranha, 1999), which allows them wide feeding flexibility (Abelha et al, 2001). Moreover, some evidence indicates that individual species with a wide distribution along the river might shift their diets according to the spatial availability of food resources (Mazzoni & Rezende, 2003;Rezende & Mazzoni, 2006;Abilhoa et al, 2009;Mazzoni et al, 2010). Thus, these contents allow us to investigate longitudinal patterns of trophic structure, having as background the assumptions of the RCC.…”

Section: Introductionmentioning

confidence: 99%

Longitudinal use of feeding resources and distribution of fish trophic guilds in a coastal Atlantic stream, southern Brazil

2013

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This study described the use of food resources and the distribution of fish trophic guilds along the longitudinal gradient of a coastal Atlantic stream, southern Brazil. Allochthonous resources (terrestrial insects) predominated in the headwaters, whereas autochthonous food items (algae, fish) and detritus predominated in the mouth section. Detritivorous, aquaticinvertivorous, and terrestrial-and aquatic-insectivorous species occurred throughout the gradient, while omnivorous and piscivorous in the headwaters and middle stretches, respectively, and herbivorous in the middle and mouth. Detritivores and aquatic-insectivores were significantly more specialized than the other guilds, however, there was no evidence of a longitudinal increase in trophic specialization. Density and biomass of aquatic-invertivores and aquatic-insectivores decreased, whereas that of detritivores increased longitudinally. The distribution of trophic guilds was significantly associated with the stream section, where aquatic and terrestrial insectivorous were more frequent in rocky and flowed stretches from the headwater and detritivores in deeper environments with finer particles of substrate from the mouth. This suggests that fish assemblages in coastal streams with a steep longitudinal gradient may follow patterns in the use of food resources according with the food availability along the river, as predicted by the River Continuum Concept.Este estudo descreve o uso dos recursos alimentares e a distribuição das guildas tróficas de peixes ao longo do gradiente longitudinal de um riacho da encosta Atlântica, Sul do Brasil. Recursos alóctones (insetos terrestres) foram consumidos com maior frequência na cabeceira, entretanto, recursos de origem autóctone (algas, peixes) e detritos foram mais frequentemente registrados na foz. Espécies detritívoras, invertívoras aquáticas, insetívoras terrestres e aquáticas ocorreram ao longo de todo gradiente, enquanto que as onívoras e piscívoras na cabeceira e meio, respectivamente, e herbívoras no meio e foz. Detritívoras e insetívoras aquáticas foram significativamente mais especializadas em relação às demais guildas; entretanto, não houve nenhuma evidência de aumento longitudinal da especialização trófica. A densidade e a biomassa de invertívoras e insetívoras aquáticas diminuíram, enquanto que das detritívoras aumentaram no sentido cabeceira-foz. A distribuição das guildas tróficas foi significativamente associada com a secção do riacho, onde insetívoras aquáticas e terrestres foram mais frequentes em trechos rochosos e de elevado fluxo da cabeceira, enquanto que detritívoras em ambientes mais profundos com partículas finas de substrato da foz. Tais resultados sugerem que assembleias de peixes de riachos tropicais de encosta, os quais apresentam acentuado gradiente longitudinal, podem seguir padrões de uso dos recursos alimentares de acordo com a disponibilidade alimentar ao longo do rio, como previstos no Conceito de Continuidade de Rios.

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Diet and feeding daily rhythm of Pimelodella lateristriga (Osteichthyes, Siluriformes) in a coastal stream from Serra do Mar - RJ

Abstract: The present study was carried out in Mato Grosso fluvial system, a costal drainage from Serra do Mar. We analysed the diet and the feeding daily rhythm of Pimelodella lateristriga from samples carried out during 24 hours over a 4 hour fishing interval,

Cited by 6 publications

References 31 publications

Niche enlargement as a consequence of co-existence: a case study

Niche enlargement as a consequence of co-existence: a case study

Feeding patterns, trophic structure and damming rivers effect: studies applied in freshwater environments in the Brazilian semi-arid region

Longitudinal use of feeding resources and distribution of fish trophic guilds in a coastal Atlantic stream, southern Brazil

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