Estrutura populacional, aspectos da reprodução e alimentação dos Cyprinodontiformes (Osteichthyes) de um riacho do sudeste do Brasil

Aranha, José Marcelo Rocha; Caramaschi, Érica Pellegrini

doi:10.1590/s0101-81751999000300005

Cited by 37 publications

(30 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The reason for this differentiated distribution found for these two studied species is difficult to explain and more detailed tests including bioassays are needed in order to have a better insight into the influence of water quality on species distribution. Hitherto, an indication of negative interaction between Phalloceros and Poecilia was reported by Aranha and Caramaschi (1999) who suggested that sympatry of Phalloceros caudimaculatus and Poecilia vivipara resulted in prejudice for the first species, since both species have similar diets. It is probable that abundant food availability at Z2 due to organic loads from municipality effluents enable the occurrence of P. reticulata in high numbers.…”

Section: Resultsmentioning

confidence: 96%

“…Measurements were performed to total length (TL) to the nearest mm and to total weight (TW) to the nearest 0.1 g. Separation between juveniles and adults for both species were according to Aranha and Caramaschi (1999) who stated that specimens lower than 20 mm TL that did not show indication of gonopodium development or reproductive activity were assigned as juveniles. All females were examined for sexual maturation, and classified as pregnant if they had an extended coelomatic cavity due to presence of eggs or embryos, and not pregnant if they did not present these characteristics.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Distribution of guppies Poecilia reticulata (Peters, 1860) and Phalloceros caudimaculatus (Hensel, 1868) along a polluted stretch of the Paraíba do Sul River, Brazil

et al. 2009

View full text Add to dashboard Cite

Cyprinodontiformes fishes (guppies) are widely distributed in Neotropical regions and use deteriorated microhabitats in rivers where few species can occur. This study was carried out in a stretch of the Paraíba do Sul River in bracketing a large urban-industrial complex. The aim was to assess eventual effects that the industrial complex could have on distribution of two closely related fish species of guppies, Phalloceros caudimaculatus and Poecilia reticulata. The area was divided into three zones: Z1, 40 km upriver of the major urban-industrial complex of Volta Redonda; Z2, just down river of the complex; and Z3, 30 km down river of the complex. Six sites (two in each zone) were sampled monthly between November 1998 and October 1999, using a standardized fishing effort with cast net throws, trays lifts and seine hauls, covering different microhabitats, that is, riffles, pools and the proximity of the river's margins. Poecilia reticulata was widely distributed, peaking at Z2, the most polluted area, while P. caudimaculatus showed the highest abundance at Z3, being almost absent in Z1. Both species occurred in high numbers throughout the year but they were scarce between April and June. Females outnumbered males for both species in most size classes and at all sites. Juveniles were more abundant than adults, with non-pregnant females outnumbering pregnant ones. Condition factor was always higher in males than females but only males P. reticulata showed significant difference among the three zones, with the highest values at Z2. The higher number of females confirms the expectation that these species can use very polluted areas and that availability of food provided by organic loads allowed their distribution all over the area. Although these two species have shown indication of spatial separation in the study area, their similar seasonal patterns of occurrence suggest that they respond in a similar way to changes in environmental conditions. Keywords: pollution, distribution, Cyprinodontiformes, population structure, Paraíba do Sul River. Redonda; Z2, imediatamente abaixo do complexo industrial; e Z3, 30 km abaixo do complexo. Seis locais (dois em cada zona) foram amostrados mensalmente entre novembro de 1998 e outubro de 1999, usando um esforço de pesca estandardizado com tarrafas, peneiras e arrastos, cobrindo diferentes microhábitats, isto é, corredeiras, remansos e a proximidade da margem dos rios. Poecilia reticulata foi largamente distribuído, apresentando pico na Z2, área mais poluída, enquanto P. caudimaculatus apresentou a maior abundância na Z3, sendo quase ausente na Z1. Ambas as espécies ocorreram em elevados números ao longo do ano, mas foram escassas entre abril e junho. Fêmeas foram mais numerosas do que machos para ambas as espécies na maioria das classes de tamanho e em todos os locais. Jovens foram mais abundantes que adultos, com fêmeas não grávidas predominando sobre fêmeas grávidas. Fator de condição foi sempre maior nos machos do que nas fêmeas, mas somente machos de P. reticulata a...

show abstract

Section: Resultsmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Distribution of guppies Poecilia reticulata (Peters, 1860) and Phalloceros caudimaculatus (Hensel, 1868) along a polluted stretch of the Paraíba do Sul River, Brazil

et al. 2009

View full text Add to dashboard Cite

show abstract

“…No Paraíba do Sul, são um dos grupos mais abundantes e amplamente distribuídos. ARANHA & CARAMASCHI (1999) verificaram que este grupo de peixes apresenta período reprodutivo prolongado e atribuem esta estratégia a uma resposta biológica a ambientes instáveis, onde a reposição contínua de jovens constituiria um mecanismo de restabelecimento da estrutura da população.…”

Section: Discussionunclassified

Diversidade das assembléias de peixes nas quatro unidades geográficas do rio Paraíba do Sul

Teixeira

Pinto

Terra

et al. 2005

Iheringia, Sér. Zool.

View full text Add to dashboard Cite

ABSTRACT. Diversity of fish assemblages in the four geographic units of the Paraíba do Sul river. Diversity patterns of fish assemblages along the four geographic units (upper, middle-upper, middle-lower and lower reaches) of the Paraíba do Sul river were studied aiming to assess spatial (geographic units) and seasonal (wet/dry periods) variations. Twenty-five sites were sampled between December 2002 and March 2003 (summer/wet) and, August to November 2003 (winter/dry). Fish were caught by a standardized effort, using gill nets, cast nets and mesh trays. A total of 81 species were recorded comprised in 9 orders, 29 families and 55 genera. Characiformes showed the highest number of species (28) followed by Siluriformes (23). Perciformes, mainly Tilapia rendalli and Geophagus brasiliensis, and Cyprinodontiformes, mainly Poecilia vivipara and Poecilia reticulata, were the most numerically abundant groups, while Siluriformes, mainly Hypostomus luetkeni, and Perciformes, mainly Geophagus brasiliensis showed the highest biomass. Poecilia vivipara was recorded only in dry period. Spatially, Hoplosternum littorale predominated in the middle-upper reaches, Pimelodus fur, Hypostomus luetkeni, Glanidium albescens in the middle-lower, and Loricariichtys spixii and Prochilodus lineatus, in the lower reach. Number of species and Margalef's richness showed an increase from the upper to the lower river reaches, mainly during the wet period. Species widely distributed along all over the river extent (G. brasiliensis, Oligosarcus hepsetus e P. reticulata) are opportunistic and can use the available resources despite poor environmental conditions, reflecting the state alteration of the river. Differentiation on the physiography throughout the longitudinal extent of the basin does not match shifts in fish assemblages, suggesting that factors associated to habitat alterations could be structuring fish community at local scale. KEYWORDS.Fish assemblages, spatial patterns, fish distribution, ichthyofauna, neotropical rivers. espécies e a riqueza de Margalef apresentaram um aumento do trecho superior para o inferior, principalmente durante o período de cheia. Espécies que apresentaram ampla distribuição ao longo do rio (G. brasiliensis, Oligosarcus hepsetus e P. reticulata) são consideradas oportunistas por se aproveitarem dos recursos disponíveis em ambientes pobres, refletindo o estado de alterações do rio. Diferenciações na fisiografia ao longo da extensão longitudinal da bacia não coincidiram com mudanças nas assembléias de peixes, sugerindo que fatores associados a alterações de hábitats poderiam estar estruturando a comunidade de peixes a nível local. PALAVRAS-CHAVE.Assembléias de peixes, padrões espaciais, distribuição de peixes, ictiofauna, rios neotropicais.O rio Paraíba do Sul é um dos mais utilizados sistemas lóticos do Brasil, por situar-se entre os maiores centros urbano-industriais do país, e tem sofrido alterações de origem antrópica ao longo dos últimos quatro séculos. A intensa urbanização e industrialização são os mai...

show abstract

“…Contudo, estudos anteriores (CHAO et al 1985, FONTOURA et al 1994, KOBLITZ & ANDREATA 1996, ARANHA & CAMASCHI 1999 usaram a designação J. lineata para indivíduos que ocorrem fora do Rio Cebollati. Todavia, segundo GUEDOTTI & WEITZMAN (1996), tais indivíduos devem ser considerados como J. multidentata.…”

Section: Yns (Pisces) (Pisces) (Pisces) (Pisces) (Pisces)unclassified

Influência da salinidade no crescimento de juvenis de Jenynsia multidentata Jenyns (Pisces)

Garcia

Vieira

2005

Rev. Bras. Zool.

View full text Add to dashboard Cite

Estrutura populacional, aspectos da reprodução e alimentação dos Cyprinodontiformes (Osteichthyes) de um riacho do sudeste do Brasil

Cited by 37 publications

References 20 publications

Distribution of guppies Poecilia reticulata (Peters, 1860) and Phalloceros caudimaculatus (Hensel, 1868) along a polluted stretch of the Paraíba do Sul River, Brazil

Distribution of guppies Poecilia reticulata (Peters, 1860) and Phalloceros caudimaculatus (Hensel, 1868) along a polluted stretch of the Paraíba do Sul River, Brazil

Diversidade das assembléias de peixes nas quatro unidades geográficas do rio Paraíba do Sul

Influência da salinidade no crescimento de juvenis de Jenynsia multidentata Jenyns (Pisces)

Contact Info

Product

Resources

About