Assemblage of fish species associated with aquatic macrophytes in Porto Murtinho Pantanal, Mato Grosso do Sul, Brazil

Súarez, Yzél Rondon; Ferreira, Fabiane Silva; Tondato, Karina Keyla

doi:10.1590/s1676-06032013000200017

Cited by 15 publications

(6 citation statements)

References 18 publications

(24 reference statements)

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“…In fact, macrophytes play a vital role in primary production as an important food resource for aquatic and terrestrial organisms. These plants provide both living (grazing food webs) and dead organic (detritivorous food webs) matter, and affect other aquatic assemblages such as species diversity of attached organisms (Thomaz and Cunha, 2010), invertebrates (Mormul et al, 2010), macroinvertebrates (Batista-Silva et al, 2012), and fish diversity (Súarez et al, 2013). The aquatic macrophytes affect nutrient cycle through active and passive transfers of chemical elements from sediment to water (Camargo et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Estimating nitrogen and phosphorus saturation point for Eichhornia crassipes (Mart.) Solms and Salvinia molesta Mitchell in mesocosms used to treating aquaculture effluent

Henares

Camargo

2014

Acta Limnol. Bras.

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Aim:To evaluate the growth of Eichhornia crassipes (Mart.) Solms and Salvinia molesta Mitchell in tanks used for treating aquaculture effluent and compare the results with literature data in order to estimate the nutrients saturation point. Methods: An experiment with six rectangular fiberglass tanks were separated in two treatments, inflow and outflow (higher and lower nutrient concentration), and the two macrophytes above cited was carried out during 50 days. A floating quadrat with 0.25 m 2 of E. crassipes and S. molesta at inflow and outflow of the tanks was collected weekly for fresh mass measurement. At the beginning and end of the experiment samples of macrophytes were oven-dried at 60 °C until constant weight to determine the dry mass. Dry mass of plants was estimated by a simple linear regression analysis between fresh mass and dry mass (DM). Results: The N and P concentrations were significantly higher (P<0.05) in the inflow (mean of 0.66 mg L -1 and 233.6 mg L -1 , respectively) than in the outflow of the tanks (mean of 0.38 mg L -1 and 174.7 mg L -1 , respectively). However, no significantly different plant growth was observed for either higher or lower concentration. For both higher and lower nutrient concentrations, the biomass gain for E. crassipes was, respectively, 428.5 and 402.7 g DM.m 2 . For S. molesta, biomass gain was 135.2 and 143.1 g DM.m 2 , in the higher and lower concentrations, respectively. Others studies reported high growth of E. crassipes and S. molesta in concentrations of nitrogen (0.14 -0.18 mg L -1 ) and phosphorus (14.2 -77.0 mg L -1 ) lower than this study. Conclusion: The comparison of E. crassipes and S. molesta growth in this study with others allow us to assume that the saturation point of E. crassipes should be 0.26 mg L -1 of nitrogen and 77 mg L -1 of phosphorus and for S. molesta below 0.19 mg L -1 of nitrogen and 15.1 mg L -1 of phosphorus.Keywords: aquatic macrophytes, nutrients, growth, freshwater prawn, effluents.Resumo: Objetivo: Avaliar o crescimento de Eichhornia crassipes (Mart.) Solms e Salvinia molesta Mitchell em tanques utilizados para o tratamento de efluente de aquicultura e comparar os resultados com dados da literatura a fim de estimar o ponto de saturação de nutrientes. Métodos: Um experimento com seis tanques retangulares divididos em dois tratamentos, entrada e saída (maior e menor concentração de nutrientes, respectivamente), e as duas macrófitas aquáticas citadas acima foi realizado durante 50 dias. Um quadrante de 0,25 m 2 com amostras de E. crassipes e S. molesta da entrada e da saída dos tanques foi coletado semanalmente para estimar a massa fresca das macrófitas. No início e no final do experimento amostras das macrófitas foram secas em estufa a 60 °C até peso constante para determinar a massa seca. A massa seca das macrófitas foi estimada por regressão linear simples entre a massa fresca e a massa seca (MS). Resultados: As concentrações de N e P foram significativamente (P<0.05) 2014, vol. 26, no. 4, p. 420 -428 421 Estimating nit...

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Section: Introductionmentioning

confidence: 99%

Estimating nitrogen and phosphorus saturation point for Eichhornia crassipes (Mart.) Solms and Salvinia molesta Mitchell in mesocosms used to treating aquaculture effluent

Henares

Camargo

2014

Acta Limnol. Bras.

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“…In the Neotropical region, A. trifasciata is widely distributed in Argentina, Bolivia, Brazil, and Paraguay (Roncati et al, 2008;Staeck & Schindler, 2008;Súarez et al, 2013) generally found in floodplain lagoons (Lourenço et al, 2012). Nine individuals used in the present study were obtained in a commercial establishment and maintained in a 100 liters aquarium.…”

Section: Materials S and Me Thodsmentioning

confidence: 99%

Behavioral repertoire of biparental care inApistogramma trifasciata(Pisces: Cichlidae)

Mendes

Ferreira

2021

J Appl Ichthyol

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Cichlid fish exhibit a complex behavioral repertoire, mainly regarding social and reproductive behaviors. Nevertheless, although dwarf cichlids exhibit a remarkable diversity of behaviors, only a few studies have been conducted with these fish.Apistogramma trifasciata is a common dwarf cichlid in the Neotropics and widely used as ornamental fish. Both males and females are territorial and engage in biparental care. Here we observed the behavior of A. trifasciata males and females to construct an ethogram. We registered the parental care of a couple since the spawn until the moment when the offspring became independent. Striking behaviors were observed, such as male-male contests involving circling displays and mouth wrestling, and parental care, which involved mouth brooding and parental color change. Finally, we suggest that our results may be used to establish this species as a model for parental care and territoriality studies.

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“…Among the fish species existing in this floodplain, Eigenmannia desantanai belongs to the order Gymnotiformes and lives associated with macrophytes. It was previously identified as E. trilineata Lopez & Castello, 1996, and recently described by Peixoto et al (2015) occurring in the Pantanal basins of the Cuiabá and Paraguay Rivers (Pacheco & Da-Silva, 2009;Súarez et al, 2013). In this region, E. desantanai is considered an important economic resource, as it is used as live bait by professional fishermen (Resende et al, 2006), and from an ecological point of view, it is an important source of food for large fish, thus contributing to the maintenance of floodplain fishes (Gimenes et al, 2013).…”

Section: Introductionmentioning

confidence: 95%

Feeding ecology of Eigenmannia desantanai (Gymnotiformes: Sternopygidae) in southern Pantanal, Brazil

Gouveia¹,

Rondon

Súarez

2022

Acta Limnol. Bras.

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Aim This study investigated changes in the dietary composition and trophic niche breadth of Eigenmannia desantanai in the context of hydrological periods, rivers, and ontogeny. Methods Collections were performed monthly on the Paraguay and Amonguijá Rivers between February 2009 and January 2011. Results A total of 338 specimens of E. desantanai were collected, 224 of which came from the Amonguijá River and 114 from the Paraguay River. In all, 21 food items were identified. Fully remains of digested animals (RDA), Chironomidae, Cladocera, and Ostracoda showed greater importance in the diet of E. desantanai. Dietary composition was influenced by hydrological periods, followed by differences between sampled rivers, and ontogeny. In contrast, only hydrological periods explained variation in the E. desantanai trophic niche breadth. Conclusions The diet of E. desantanai is mainly composed of Chironomidae, Cladocera, and Ostracoda; however, individuals consumed other food items owing to changes in hydrological periods, followed by characteristics of the Amonguijá and Paraguay Rivers and ontogenetic variation. In this respect, the results of this study are germane to the food ecology of E. desantanai, providing guidelines for the management and conservation of the species.

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Assemblage of fish species associated with aquatic macrophytes in Porto Murtinho Pantanal, Mato Grosso do Sul, Brazil

Cited by 15 publications

References 18 publications

Estimating nitrogen and phosphorus saturation point for Eichhornia crassipes (Mart.) Solms and Salvinia molesta Mitchell in mesocosms used to treating aquaculture effluent

Estimating nitrogen and phosphorus saturation point for Eichhornia crassipes (Mart.) Solms and Salvinia molesta Mitchell in mesocosms used to treating aquaculture effluent

Behavioral repertoire of biparental care inApistogramma trifasciata(Pisces: Cichlidae)

Feeding ecology of Eigenmannia desantanai (Gymnotiformes: Sternopygidae) in southern Pantanal, Brazil

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