Biologia alimentar da ictiofauna na área de influência do reservatório da usina Mogi Guaçu e lagoas marginais da Estação Ecológica - Fazenda Campininha (SP)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Ictiofauna de lagoas marginais sazonalmente isoladas, rio Turvo, bacia do rio Grande, Alto Paraná, SP

Pós-graduação em Aquicultura - FCAV

Ecotoxicidade, segurança clínica e eficácia de fármacos em jovens de pacu (Piaractus mesopotamicus)

Pós-graduação em Aquicultura - FCAV

Bioindicadores neotropicais de ecotoxicidade e risco ambiental de fármacos de interesse para aquicultura

The aims of this research were to evaluate the acute toxicity (LC/EC50) and the environmental risk of toltrazuril (TOL) and florfenicol (FFC) for plant Lemna minor, snail Pomacea canalicuta, fish Piaractus mesopotamicus and Hyphessobrycon eques and the microcrustacean Daphnia magna. The organisms were acclimated in room bioassay with controlled temperature according to standard to each one. They were exposed at nominal concentrations in static system. For environmental risk (RQ) was used the estimated environmental concentration (EEC) that is the dosage indicate to treatment and the lethal or effective concentration (LC/CE50) from each drug in acute exposure. FFC showed LC50;7d of 97.03 mg L-1 for L. minor; >100.0 mg L-1 for P. mesopotamicus and H. eques and EC50;48h > 100.0 mg L-1 for P. canaliculata and D. magna, and it was classified low risk (RQ = 0.01) for all bioindicators. TOL howed LC50;7d >100.0 mg L-1 for L. minor, 3.72 mg L-1 for P. mesopotamicus; 6.22 mg L-1 for H. eques and CE50;48h of 7.59 mg L-1 for P. canaliculata and 18.57 mg L-1 for D. magna, and it was classified low risk (RQ = 0.01) for L. minor and high risk for P. mesopotamicus (RQ = 2.68), H. eques (RQ = 6.22), P. canaliculata (RQ = 1.31) and D. magna (RQ = 0.53). Lemna minor was the bioindicator indicating of FFC toxicity and H. eques, bioindicator of the TOL. FFC is safety however and the use of TOL necessaries cautions to treat the wastewater before discard on the environment.

Aquatic macrophytes as feeding site for small fishes in the Rosana Reservoir, Paranapanema River, southeastern Brazil

In the present investigation we studied the feeding habits of the fishes associated with aquatic macrophytes in the Rosana Reservoir, southeastern Brazil. Twenty fish species were collected during four field trips, regularly distributed across the dry and wet seasons. Focal snorkeling observations of the fishes were made over a total of six hours. Nine species were present in abundances of more than 1% and, therefore, had their feeding habits analyzed. Hemigrammus marginatus, Roeboides paranensis, Hyphessobrycon eques, Astyanax altiparanae, Serrasalmus spilopleura, and Bryconamericus stramineus were predominantly invertivores, with predominance of aquatic insects (Diptera, Ephemeroptera, and Trichoptera immatures) among their food items. The predominantly algivores were Apareiodon affinis, Serrapinnus notomelas, and Satanoperca pappaterra, with high frequency of filamentous blue-green algae, diatoms, clorophyts, and periderm. The different microhabitat exploitation plus diet composition suggests partitioning of resources and absence of food competition among the most representative fish species in the studied community, indicating the importance of the naturalistic approach to fish ecology studies.

Eficácia e ecotoxicidade do diquat em mistura com fontes de cobre para controle de Ceratophyllum demersum e alga unicelular e filamentosa

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Eficácia biológica e feitos tóxicos de fontes de cobre e diquat para organismos aquáticos

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Life-history strategies associated to reproduction of three Hyphessobrycon species (Characidae) in lentic environments of upper Paraná River basin

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A new species of Hyphessobrycon (Characiformes : Characidae) from rio Portuguesa, rio Orinoco basin, Venezuela

A new species of Hyphessobrycon is described from tributaries of the rio Portuguesa, rio Orinoco Basin, Venezuela. The new species is diagnosed from congeners by the presence of two large hooks on each side of the anal fin in adult males ( processes of last unbranched and first branched anal-fin rays), distal third of caudal-fin black except for its distal tips ( which are hyaline), anal-fin rays v, 19-21, and dorsal-fin rays ii, 8. Comments on its generic status and putative relationships are provided.

Hyphessobrycon rutiliflavidus n. sp., a new characid fish from the upper rio Paraguai, State of Mato Grosso, Brazil (Characiformes : Characidae)

Hyphessobrycon rutiliflavidus, new species, is described from the upper rio Paraguai in Cuiaba, State of Mato Grosso, Brazil. The new species differs from all other congeners by the following combination of characters: black humeral spot, slightly diffuse at its tips, and caudal-peduncle blotch present; midlateral body stripe conspicuous in its posteriormost portion, extending to the tips of the middle caudal rays; anal fin with iii, 15 to iv, 19 rays (mode iv, 17); upper jaw length, 42.3 to 49.5% of the head length; maxilla with 2-5 teeth (mode 3); all the fins of males reddish-orange and of females yellowish.

Taxonomia das populações de Hyphessobrycon boulengeri (Eigenmann, 1907) e Hyphessobrycon reticulatus Ellis, 1911 (Characiformes: Characidae)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Hyphessobrycon uaiso: new characid fish from the rio Grande, upper rio Paraná basin, Minas Gerais State (Ostariophysi: Characidae), with a brief comment about some types of Hyphessobrycon

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Redescription of Hyphessobrycon flammeus Myers, 1924 (Ostariophysi: Characidae), a threatened species from Brazil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

A new species of Hyphessobrycon Durbin (Characiformes: Characidae) from the middle rio Sao Francisco and upper and middle rio Tocantins basins, Brazil, with comments on its biogeographic history

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)