Fish assemblages of tropical floodplain lagoons: exploring the role of connectivity in a dry year

Petry, Ana Cristina; Agostinho, Ângelo Antônio; Gomes, Luiz Carlos

doi:10.1590/s1679-62252003000200005

Cited by 82 publications

(86 citation statements)

References 11 publications

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“…This same pattern was verified by Petry et al (2003) for adult fishes in the upper Paraná River floodplain in a study exploring the role of connectivity in connected and disconnected lagoons. Marginal lagoons in river floodplains are widely recognized for their importance in the maintenance and squamosissimus in the reservoirs of CESP (Energy Company of São Paulo) in the early 1970s .…”

Section: Discussionsupporting

confidence: 68%

“…Petry et al (2003) recorded lower species richness, density and biomass in connected lagoons compared to disconnected lagoons for adult fishes in the upper Paraná River floodplain. Site S1 is located in the channel that connects the river to the lake, and because the channel is not very large, it suffers from the effects of the margins being covered with aquatic vegetation, which would favor the development of fish.…”

Section: Discussionmentioning

confidence: 87%

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Fish larvae assemblages in two floodplain lakes with different degrees of connection to the Paraná River, Brazil

et al. 2009

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The objective of this study was to assess the abundance, attributes of assemblages, and spatial and temporal distributions of fish larvae and their relationships with some abiotic variables in two floodplain lakes with different degrees of connection to the Paraná River in Ilha Grande National Park, PR, Brazil. Four sampling sites were chosen, two in each floodplain lake. Night samples were taken with plankton nets during three spawning seasons (monthly, from October to March) from 2001 to 2005. The highest diversity and abundance were recorded at Saraiva Lake, with 25 taxa being identified. In Xambrê Lake, only sedentary species were captured, and the most abundant species were Plagioscion squamosissimus and Hypophthalmus edentatus. The greatest abundance of larvae was found in the second spawning season. In the Saraiva Lake, the most abundant species were Moenkhausia aff. intermedia, Hyphessobrycon sp., and Bryconamericus stramineus, but larvae of known migratory species were also documented. In this lake, the greatest abundance of larvae was found in the third spawning. Larvae abundance was influenced by water temperature and conductivity. The high diversity and abundance recorded in Saraiva Lake may be a result of its connectivity with the Paraná River, and the low diversity and abundance observed at Xambrê Lake are likely due to its isolation from the river. This work shows the importance of these lagoons for fish development, for both sedentary and migratory species. Both lagoons may be considered to have extreme ecological importance and they are also extremely susceptible to impacts, so any careless disturbance may cause irreversible damage.Este trabalho teve por objetivo avaliar a abundância, os atributos da assembleia e a distribuição espacial e temporal de larvas de peixes, bem como a relação dessas variáveis com alguns fatores abióticos, em duas lagoas com diferentes graus de conexão com o rio Paraná, Parque Nacional de Ilha Grande, PR, Brasil. As amostragens foram realizadas em quatro locais, dois em cada lagoa. As coletas foram realizadas mensalmente à noite durante três períodos de desova (outubro a março) de 2001 a 2005, com o auxílio de redes de plâncton. A maior diversidade e abundância foram verificadas na lagoa Saraiva, sendo identificados 25 táxons. Na lagoa Xambrê somente foram capturadas espécies sedentárias e as mais abundantes foram Plagioscion squamosissimus e Hypophthalmus edentatus. Nessa lagoa as maiores ocorrências foram verificadas no período II. Na lagoa Saraiva as maiores capturas foram de Moenkhausia aff. intermedia, Hyphessobrycon sp. e Bryconamericus stramineus, entretanto, larvas de espécies migradoras também foram registradas. Nessa lagoa, as maiores ocorrências foram no período III. A abundância de larvas foi influenciada pela temperatura da água e pela condutividade elétrica. A elevada diversidade e abundância registradas na lagoa Saraiva podem ser atribuídas a sua conectividade com o rio Paraná, enquanto que a baixa diversidade e abundância observadas na lagoa Xambrê pode...

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Section: Discussionsupporting

confidence: 68%

Section: Discussionmentioning

confidence: 87%

Fish larvae assemblages in two floodplain lakes with different degrees of connection to the Paraná River, Brazil

et al. 2009

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“…Em sistemas de planície de inundação, as lagoas marginais são reconhecidas como hábitat preferencial de peixes de pequeno porte, principalmente devido à grande heterogeneidade estrutural, disponibilidade de recursos e conexão sazonal com o restante do sistema durante as cheias (PETRY et al, 2003). Estas generalidades foram também confirmadas no presente estudo.…”

Section: Discussionunclassified

Influência do ciclo hidrológico na dieta e estrutura trófica da ictiofauna do Rio Cuiabá, Pantanal Mato-Grossense

Corrêa

Petry

Hahn

2009

Iheringia, Sér. Zool.

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ABSTRACT. Influence of the hydrological cycle on the diet and trophic structure of the ichthyofauna from the Cuiabá River, Pantanal of Mato Grosso, Brazil. This paper evaluate the influence of the hydrological cycle on the diet and trophic structure of the ichthyofauna from the Pantanal. Samplings were carried out monthly between March 2000 and February 2001, in the Cuiabá River and the Chacororé Lagoon. Analysis of the stomach contents of 58 species determined eight trophic categories. Species of the piscivore, detritivore and lepidophage trophic categories presented little variation in the intake food items and, therefore, they did not contribute to the variation in the composition of the diet in both environments, independently of the hydrological cycle. The effects of the flood pulse were more pronounced in the numerical abundance and biomass of detritivore and omnivore trophic categories and were depended on the environment for piscivore, invertivore, and insectivore. Apparently, specificity of the food items along with the probable high availability of food resources in the studied environments contributed to the low variation due to the hydrological seasonality in the trophic organization of the ichthyofauna. By the increment of the hydrological connectivity, the flood pulse of the Cuiabá River allows the exchange of organisms throughout the system, thus determining the variability in the structure of the trophic categories. KEYWORDS.Feeding, trophic structure, flood pulse, Neotropical fishes. RESUMO.Este estudo teve como objetivo avaliar a influência do ciclo hidrológico sobre a dieta e estrutura trófica da ictiofauna no Pantanal. Foram realizadas amostragens mensais entre março de 2000 e fevereiro de 2001, no rio Cuiabá e na lagoa Chacororé. A análise dos conteúdos estomacais de 58 espécies permitiu o reconhecimento de oito categorias tróficas. Peixes das categorias piscívora, detritívora e lepidófaga foram os que apresentaram menor variação na composição da dieta em ambos os ambientes, independente do período hidrológico. Os efeitos do pulso de inundação foram pronunciados na abundância numérica e na biomassa das categorias detritívora e omnívora, enquanto variações nestes parâmetros apresentaram-se relacionadas ao tipo de ambiente para as categorias piscívora, invertívora e insetívora. Os resultados sugeriram que tanto a especialização por alguns itens alimentares quanto a provável elevada disponibilidade de recursos alimentares nos ambientes investigados contribuíram para o fraco efeito do ciclo hidrológico na organização trófica da ictiofauna. Através do aumento da conectividade hidrológica, o pulso de inundação do rio Cuiabá possibilita o deslocamento dos organismos pelo sistema, que deve determinar a variabilidade na estrutura das categorias tróficas. PALAVRAS-CHAVE.Alimentação, estrutura trófica, pulso de inundação, peixes neotropicais.Estudos sobre alimentação da ictiofauna permitem reconhecer categorias tróficas distintas e inferir sobre a estrutura e o grau de importância dos diferentes níveis...

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“…The high availability of nutrients in the system during flooding stimulates the rapid growth of microorganisms, invertebrates and aquatic macrophytes, providing food and shelter for species that exploit this environment (Jordan, et al, 1997;Lowe-McConnell, 1999;Penha et al, 1999;Saint-Paul et al, 2000;Agostinho et al, 2001;Li & Gelwick, 2005). The magnitude and duration of the flood may act in a different way on species that use temporary habitats to complete their life cycle, thus affecting the species composition of aquatic communities that use the river-plain system Petry et al, 2003;Thomaz et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Spatial pattern of a fish assemblage in a seasonal tropical wetland: effects of habitat, herbaceous plant biomass, water depth, and distance from species sources

Fernandes¹,

Machado

Penha

2010

Neotrop. ichthyol.

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The influence of habitat, biomass of herbaceous vegetation, depth and distance from permanent water bodies on the structure of fish assemblages of a seasonal floodplain was evaluated using data collected along 22 transects in an area of 25 km 2 in the floodplain of Cuiabá River, Pantanal, Brazil. Each transect was sampled for fish using throw traps and gillnets during the flood period of 2006. Multivariate multiple regression analysis and multivariate analysis of covariance indicated that depth was the only variable that affected the structure of the fish assemblage, both for quantitative data (abundance) and qualitative data (presence-absence). Species such as Neofundulus parvipinnis and Laetacara dorsigera were more abundant in shallower sites (below 25 cm), while Serrasalmus maculatus and Metynnis mola were found mostly in the deepest areas (over 55 cm). However, species such as Hoplias malabaricus and Hoplerythrinus unitaeniatus occurred at all sampled depths. Although the distribution of most species was restricted to a few sites, there was a positive relationship between species richness and depth of the water body. Surprisingly, the replacement of native vegetation by exotic pasture did not affect the fish assemblage in the area, at the probability level considered.A influência do habitat, biomassa de vegetação herbácea, da profundidade e da distância de corpos d'água permanentes sobre a estrutura da assembleia de peixes da planície sazonalmente inundada foi avaliada com dados coletados em 22 transectos em uma área de 25 km² na planície de inundação do rio Cuiabá, Pantanal. Cada transecto foi amostrado para peixes usando "throw trap" e rede de espera no período de cheia de 2006. Análises de regressão múltipla multivariada e análises de covariância multivariada indicaram que a profundidade foi a única das variáveis consideradas no estudo que afetou a estrutura da assembleia de peixes, tanto para os dados quantitativos (abundância) quanto para os dados qualitativos (presença-ausência). Espécies como Neofundulus parvipinnis e Laetacara dorsigera foram mais abundantes em locais mais rasos (abaixo de 25 cm), enquanto as espécies Serrasalmus maculatus e Metynnis mola foram encontradas principalmente nos locais mais profundos (acima de 55 cm). Entretanto espécies como Hoplias malabaricus e Hoplerythrinus unitaeniatus ocorreram em todas as profundidades amostradas. Apesar de grande parte das espécies apresentarem distribuição restrita a poucos locais, houve uma relação positiva entre a riqueza de espécies e a profundidade do corpo d'água. Surpreendentemente, no nível de probabilidade considerado, a substituição da vegetação nativa por pastagens exóticas não afetou a assembleia de peixes na área estudada.

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Fish assemblages of tropical floodplain lagoons: exploring the role of connectivity in a dry year

Cited by 82 publications

References 11 publications

Fish larvae assemblages in two floodplain lakes with different degrees of connection to the Paraná River, Brazil

Fish larvae assemblages in two floodplain lakes with different degrees of connection to the Paraná River, Brazil

Influência do ciclo hidrológico na dieta e estrutura trófica da ictiofauna do Rio Cuiabá, Pantanal Mato-Grossense

Spatial pattern of a fish assemblage in a seasonal tropical wetland: effects of habitat, herbaceous plant biomass, water depth, and distance from species sources

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