Alimentação e ciclo alimentar diário de Hoplosternum littorale (Hancock) (Siluriformes, Callichthyidae) nas lagoas Guaraná e Patos da planície do alto rio Paraná, Brasil

Hahn, Norma Segatti; Almeida, Vera Luci de; Luz, Karla Danielle Gaspar da

doi:10.1590/s0101-81751997000100005

Cited by 25 publications

(21 citation statements)

References 6 publications

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“…Stomach content was analysed under stereo microscope and quantified using the Volumetric (V O ) and Frequency of Occurrence (F O ) methods (Hyslop, 1980). Diet items were identified according to the literature (Salles et al, 2004;Triplehorn and Johnson, 2005;Passos et al, 2007;Mugnai et al, 2010) Kawakami and Vazzoler (1980) and adapted by Hahn et al (1997), according to the equation: IA i = (F i *V i )/Σ F i *V i )*100, where i = 1, 2, … n food items; F i = frequency of occurrence of a given food item; V i = volume of a given food item. Food items were grouped according to type (animal and vegetal) and origin (autochthonous and allochthonous).…”

Section: Sampling and Data Analysismentioning

confidence: 99%

Plasticity in the diet of Astyanax taeniatus in a coastal stream from south-east Brazil

Rezende

Mazzoni

2012

Braz. J. Biol.

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In this work we aimed to characterise the diet of Astyanax taeniatus (Jenyns 1842) (Characiformes, Characidae) along the Mato Grosso stream and we hypothesised that the diet of this species would vary according to spatial, seasonal and ontogenetic differences. Specimens were collected every second month at three sites with different physical attributes. The feeding habits of 651 specimens were analysed using the Alimentary Index (IA i ). Analysis of the diet showed an effect of spatial, temporal and ontogenetic factors. Vegetal allochthonous items were more important in the diet of Astyanax taeniatus in upstream sites while animal autochthonous items were more important downstream. Ontogenetic differences in the diet were significant only in upstream sites, where adults consumed a greater amount of vegetal matter than juveniles. These results reinforce the idea that Astyanax species are opportunistic and show trophic plasticity.Keywords: feeding, opportunism, stream fish. Plasticidade trófica em Astyanax taeniatus de um riacho costeiro do Sudeste do Brasil ResumoNeste trabalho, objetivou-se caracterizar a dieta de Astyanax taeniatus (Jenyns 1842) (Characiformes, Characidae) ao longo do Rio Mato Grosso, com a hipótese de que a espécie apresente variações espaciais, sazonais e ontogenéticas. Os exemplares foram coletados bimestralmente em três localidades, que diferiram pelas variáveis físicas. As preferências alimentares foram analisadas a partir de 651 exemplares, utilizando-se o Índice Alimentar (IA i ). Foram avaliadas diferenças espaciais, sazonais e ontogenéticas a partir dos dados de dieta. Os itens de origem vegetal e alóctone foram mais importantes na dieta da espécie para as localidades com maior altitude, enquanto os itens animais e autóctones, na localidade baixa. Na dieta de jovens e adultos, houve diferença significativa na contribuição de itens de origem vegetal e animal somente na localidade mais alta, onde os adultos consumiram maior quantidade de matéria vegetal. Os resultados reforçam a ideia de que as espécies de Astyanax possuem hábito alimentar onívoro e oportunista, evidenciando sua alta plasticidade alimentar ao longo do riacho.Palavras-chave: alimentação, oportunismo, peixe de riacho.

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Section: Sampling and Data Analysismentioning

confidence: 99%

Plasticity in the diet of Astyanax taeniatus in a coastal stream from south-east Brazil

Rezende

Mazzoni

2012

Braz. J. Biol.

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“…According to Hahn et al (1997), the H. littorale is a species with a large eating variety; the larvae and the young animals feed mainly on rotifers, microcrustaceans (mainly copepods) and other small invertebrates, while the adults explore more the groups of microcrustaceans, chironomidae and nematodes, in addition to organic detritus and sand grains (Nico et al 1996). According to Agostinho et al (2004) this species is considered migratory of short distances or sedentary, with parental care.…”

Section: Introductionmentioning

confidence: 99%

Parasitic communities of Hoplosternum littorale (Hancock, 1828) as indicators of environmental impact

Dias

Alves

Silva

et al. 2017

An. Acad. Bras. Ciênc.

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The parasites are indicative of several biological aspects of their hosts, including their diet, migration, recruitment and phylogeny, but they can also be direct indicators of the environmental quality. Hoplosternum littorale is a fish that has a high commercial value in some South American countries. The fishes were collected from January to July 2012, in two locations of the Peixe River in the municipality of Anhembi, State of São Paulo, Brazil, which had different environmental and limnological characteristics (river mouth and Lagoa Cabeça de Boi). An amount of 30 fish specimens were captured in each location for the analysis of their parasitic fauna. Nine species of metazoan parasites were collected. Both Brillouin`s diversity index and Margalef`s richness index were greater in the Lagoa Cabeça de Boi. The ratio of heteroxenous and monoxenous parasite species richness (S H /S M ) was higher in the Lagoa Cabeça de Boi. The results of the physicochemical analysis of the water showed that the mouth of the Peixe River can be considered an area that suffers more from anthropogenic actions than the Lagoa da Cabeça de Boi. Proteocephalus sp., Gyrodactylus sp., Scleroductus sp. and Capillaria (Neocapillaria) pterophylli are being registered for the first time in this host.

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“…This species is well adapted to the environment presenting biological adaptations such as obligated air breather, parental care and floating foam nest building and guarding by males (Reis, 2003;Mol, 1996;Reis, 1998). Considering that diet studies performed at the wetlands of the upper Paraná River basin, its native area, indicate high predation of microcrustaceans, chironomids and nematodes (Hahn et al, 1997), it is possible that its higher impact is on zooplankton and zoobenthos communities, disrupting the food web and consequently the ecosystem functioning. On the other hand, it can also be an alternative resource to the lake's piscivorous species since it was identified as a food item of P. nattereri (Santos, 2008) and of C. kelberi (PELD/UFMG Report, non-published data) in Lake Carioca.…”

Section: Discussionmentioning

confidence: 99%

Loss of biodiversity in a conservation unit of the Brazilian Atlantic Forest: the effect of introducing non-native fish species

et al. 2016

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The introduction of species has become an important problem for biodiversity and natural ecosystem conservation. The lake system of the middle Rio Doce (MG, Brazil) comprises c. 200 lakes at various conservation states, of which 50 are located within the Rio Doce State Park (PERD). Previous studies had verified several of these lakes suffered non-native fishes introductions and the presence of these species needs for the implementation of actions aiming at not only their control but also the preservation of the native species. This study discusses the effects of non-native fish species in the largest conservation unit of Atlantic Forest in Minas Gerais, southeast of Brazil, using data from 1983 to 2010 distributed as follow: data prior to 2006 were obtained from previous studies, and data from September 2006 to July 2010 were obtained in Lake Carioca at four sampling stations using gillnets, seine nets and sieve. A total of 17 fish species was collected (2006)(2007)(2008)(2009)(2010) of which five were introduced species. Among the small to medium size native species (30 to 2000 mm standard length) seven had disappeared, two are new records and one was recaptured. The non-native species Cichla kelberi (peacock bass) and Pygocentrus nattereri (red piranha) are within the most abundant captured species. Integrated with other actions, such as those preventing new introductions, a selective fishing schedule is proposed as an alternative approach to improve the conservation management actions and the local and regional biodiversity maintenance.Keywords: fish fauna, biological invasion, Rio Doce basin, conservation management, local extinction. Palavras-chave: ictiofauna, invasão biológica, bacia do Rio Doce, manejo conservacionista, extinção local. Perda de biodiversidade em uma unidade de conservação da Mata Atlântica brasileira: efeitos da introdução de espécies não nativas de peixes

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Alimentação e ciclo alimentar diário de Hoplosternum littorale (Hancock) (Siluriformes, Callichthyidae) nas lagoas Guaraná e Patos da planície do alto rio Paraná, Brasil

Cited by 25 publications

References 6 publications

Plasticity in the diet of Astyanax taeniatus in a coastal stream from south-east Brazil

Plasticity in the diet of Astyanax taeniatus in a coastal stream from south-east Brazil

Parasitic communities of Hoplosternum littorale (Hancock, 1828) as indicators of environmental impact

Loss of biodiversity in a conservation unit of the Brazilian Atlantic Forest: the effect of introducing non-native fish species

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