Reproduction of Oligosarcus hepsetus (Cuvier, 1829) (Characiforms) in the Serra do Mar State Park, São Paulo, Brazil

Gomiero, Leandro Muller; Garuana, Luziana; Braga, Francisco Manoel de Souza

doi:10.1590/s1519-69842008000100027

Cited by 17 publications

(18 citation statements)

References 13 publications

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“…Em contraste, uma fecundidade muito reduzida é comumente encontrada em espécies de pequeno porte que apresentam características que podem aumentar as chances de sobrevivência dos ovos e larvas, tais como inseminação, fecundação interna e cuidado parental (GELAIN et al, 1999;Azevedo et al, 2000;OLIVEIRA et al, 2002;SILVANO et al, 2003;LAMPERT et al, 2004LAMPERT et al, , 2007OLIVEIRA et al, 2010). Astyanax henseli apresentou uma fecundidade intermediária, concordando com dados de espécies não migradoras, sem cuidado parental que possuem fecundação externa e desova total (VAZZOLER & MENEZES, 1992;GOMIERO et al, 2008). Embora a reprodução de espécies de Astyanax possa ser, normalmente, relacionada a uma desova pelágica de milhares de ovos (MAZZONI et al, 2004(MAZZONI et al, , 2005, os estudos evidenciam que, dentro do gênero, há uma grande variação na fecundidade interespecífica (NOMURA, 1975;BARBIERI, 1992;MAZZONI et al, 2005).…”

Section: Resultsunclassified

“…A fecundidade depende, em grande parte, do volume da cavidade celomática disponível para alojar ovócitos maduros, estando diretamente relacionada ao tamanho corporal das espécies e dos indivíduos (VAZZOLER, 1996;LOWE-MCCONNELL, 1999;GOMIERO et al, 2008). O cálculo da fecundidade relativa permite comparar a fecundidade entre espécies de diferentes tamanhos e, dessa forma, estimar o investimento energético proporcional de cada espécie ou população na produção de ovócitos (ADEBISI, 1987;AZEVEDO et al, 2000AZEVEDO et al, , 2010GONÇALVES et al, 2005).…”

Section: Resultsunclassified

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Biologia reprodutiva de Astyanax henseli (Teleostei, Characidae) do curso superior do Rio dos Sinos, RS, Brasil

Dala‐Corte

Azevedo

2010

Iheringia, Sér. Zool.

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ABSTRACT. Reproductive biology of Astyanax henseli (Teleostei, Characidae) in the upper Rio dos Sinos, RS, Brazil. This study describes the reproductive biology of a population of Astyanax henseli Melo & Buckup, 2006 from the upper Rio dos Sinos, Caraá, Rio Grande do Sul, Brazil. A total of 336 specimens was analyzed, comprising 169 males, 154 females and 13 individuals of undetermined sex. The reproductive season lasted approximately five months, from August to December, gonadossomatic index (GSI) peaked of in October, corresponding to the end of winter and the spring in the southern hemisphere. No correlation was found between the GSI and abiotic factors (temperature, rainfall and photoperiod). However, these factors may trigger gonad maturation. Also, no correlation was observed between biotic variables, such as stomach repletion index (RI) and hepatosomatic index (HSI), and GSI. Despite that, high RI values during the reproductive period may indicate that A. henseli maintains its feeding activity throughout the reproductive months, while low HSI values during the peak of GSI suggest a higher energy expenditure of the liver during this period. The sex ratio in the population was 1:1 for the total number of individuals sampled, among different classes of length, and among the different months of the year. The size at first gonadal maturation was 69 mm for males and 60 mm for females. The absolute fecundity mean was 3,038 oocytes and the relative fecundity mean was 0.13 oocytes mg -1 . The oocyte development indicated that A. henseli is a total spawner. KEYWORDS.Reproductive period, small size characid, gonadosomatic index, fecundity, first gonadal maturation. RESUMO. No presente estudo é descrita a biologia reprodutiva de uma população de Astyanax henseli PALAVRAS-CHAVE.Período reprodutivo, caracídeo de pequeno porte, índice gonadossomático, fecundidade, primeira maturação gonadal.

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Section: Resultsunclassified

Biologia reprodutiva de Astyanax henseli (Teleostei, Characidae) do curso superior do Rio dos Sinos, RS, Brasil

Dala‐Corte

Azevedo

2010

Iheringia, Sér. Zool.

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“…The specimens were identified according to Britski et al (2007), Graça & Pavanelli (2007) and Benine et al (2009), labeled, weighed and measured. Only adult individuals were analyzed (Gomiero et al, 2008;Montag et al, 2011), considering that the ontogenetic growth can promote significant changes in morphology (Novakowski et al, 2004;Vitule et al, 2008) or feeding habit (Drewe et al, 2004). Voucher specimens of Apistogramma commbrae (Regan, 1906) Morphometric data estimation.…”

Section: Methodsmentioning

confidence: 99%

Ecomorphology and use of food resources: inter- and intraspecific relationships of fish fauna associated with macrophyte stands

2016

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Based on the form-function interaction and its consequence to niche exploitation by fish species, the study aimed to identify ecomorphological patterns and to investigate the possibility of explaining the trophic niche breadth using the pattern of intraspecific ecomorphological diversity. We tested the following hypotheses: i) the morphology explains variations in diet among fish species; ii) the intraspecific ecomorphological diversity is related to the breadth of the trophic niche explored by the species, so that species that feed on a wider range of resources have greater variation in body shape compared to those specialized in resource consumption. Fish were collected in stands of the aquatic macrophytes Eichhornia azurea and Eichhornia crassipes in lentic environments of the Upper Paraná River floodplain, Brazil. Two major trends were observed in the morphological space: fish with body shapes adapted to explore the substrate and others with a design that facilitates the capture of food items in more structured habitats. The relationship of diet with body shape was confirmed by significant relationships between matrices of trophic and morphological distances, providing evidence that morphology is related to interspecific variations in the use of trophic resources. However, the ranges of morphological and intraspecific trophic variations were not significantly related, rejecting the second hypothesis about the relationship between intraspecific ecomorphological diversity and trophic niche breadth. The morphological characteristics often have multiple ecological roles, which could result in trade-off among these functions. Thus, fish with highly specialized morphology may show specialist feeding or even generalist habit, because in this case some resources may be difficult to exploit, even by a specialist. Species with low and high morphological diversity demonstrated narrow trophic niche and the availability of resources may have been essential for consumption. Therefore, species morphology is related to the use of food resources and ecomorphology can be considered an important tool for the prediction of the exploited niche space by species in assemblages. However it is not possible to predict if species with greater intraspecific morphological diversification indeed have wider niche, since the abundance or scarcity of the available food resources may interfere with trophic niche breadth.Baseado na interação entre forma e função e suas consequências para exploração do nicho pelas espécies, o objetivo deste estudo foi identificar padrões de variação ecomorfológica e investigar se a amplitude de nicho trófico pode ser explicada pelo padrão de diversificação ecomorfológica intraespecífica. Assim, testaram-se as hipóteses: i) a morfologia explica as variações na dieta entre as espécies de peixes ii) a diversificação morfológica intraespecífica está relacionada com a amplitude do nicho trófico explorado pelas espécies, de modo que, espécies que se alimentam de maior variedade de recursos apresentam maior variação ...

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“…A taxa instantânea de mortalidade natural (M) foi estimada utilizando-se os parâmetros: taxa de crescimento (K), comprimento assintótico (L∞) e temperatura média da água em graus centígrados no período, segundo a Equação 2 empírica proposta por Pauly (1980), sendo: log 10 M = -0,0066 -0,279 × log 10 L∞ + log 10 k + 0,4634 × log 10 T° (2) Apesar de Oligosarcus hepsetus apresentar desova do tipo parcelada, houve um pico reprodutivo (Gomiero et al 2008), o que tornou possível a identificação de diferentes coortes nas distribuições…”

Section: Methodsunclassified

“…Oligosarcus hepsetus é um Characiforme carnívoro de pequeno a médio porte (Géry 1977) com ampla distribuição nos ambientes de água doce do sudeste do Brasil (Santos et al , 2006. Na literatura, encontram-se disponíveis informações sobre a dieta e o desenvolvimento ovariano e testicular dessa espécie no reservatório de Lajes -RJ (Santos et al , 2006.…”

Section: Introductionunclassified

Crescimento e mortalidade de Oligosarcus hepsetus (Cuvier, 1829) (Characiformes, Characidae) no Parque Estadual da Serra do Mar, Núcleo Santa Virgínia, São Paulo, Brasil

et al. 2011

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Growth and mortality parameters were estimated for Oligosarcus hepsetus caught in the Serra do Mar State Park, Núcleo Santa Virginia. Monthly length frequencies distributions were analyzed with the ELEFAN method within the FISAT program, using the seasonal version of the Von Bertalanffy's growth curve. The instantaneous rate of natural mortality was calculated using the empirical formula proposed by Pauly. The estimated parameters were K = 0.72, L∞ = 23.3 cm, C = 0.3, Wp = 0.7 and M = 1.25. These parameters corroborate the characteristics of a predator species with long reproductive period, spawning parceled out without parental care, and that lives in a typical river of Atlantic forest. Estes parâmetros corroboram as características de uma espécie predadora com longo período reprodutivo, desova parcelada sem cuidado com a prole e que vive em um rio típico de Mata Atlântica. Palavras-chave: peixe-cachorro, espécie dulciaquícola neotropical, parâmetros populacionais, frequência de comprimento, Mata Atlântica.

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Reproduction of Oligosarcus hepsetus (Cuvier, 1829) (Characiforms) in the Serra do Mar State Park, São Paulo, Brazil

Cited by 17 publications

References 13 publications

Biologia reprodutiva de Astyanax henseli (Teleostei, Characidae) do curso superior do Rio dos Sinos, RS, Brasil

Biologia reprodutiva de Astyanax henseli (Teleostei, Characidae) do curso superior do Rio dos Sinos, RS, Brasil

Ecomorphology and use of food resources: inter- and intraspecific relationships of fish fauna associated with macrophyte stands

Crescimento e mortalidade de Oligosarcus hepsetus (Cuvier, 1829) (Characiformes, Characidae) no Parque Estadual da Serra do Mar, Núcleo Santa Virgínia, São Paulo, Brasil

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