Parasite fauna monitoring of matrinxã Brycon amazonicus (Spix and Agassiz, 1829) raised in aN intensive husbandry system in a stream channel in the state of Amazonas, Brazil.

Comparative study on hematological parameters of farmed matrinxã, Brycon amazonicus Spix and Agassiz, 1829 (Characidae: Bryconinae) with others Bryconinae species

The aim of this study was not only to determine the red blood cells parameters, thrombocyte and leukocyte counts in farmed Brycon amazonicus (matrinxã), to compare these parameters among Bryconinae species from literature, and also to investigate the presence of special granulocytic cells in these fish. The results of the blood cells parameters here established for farmed B. amazonicus, a speci...

Influence of food restriction on the reproduction and larval performance of matrinxã, Brycon amazonicus (Spix and Agassiz, 1829).

This work evaluated the effect of food restriction and refeeding of matrinxã females, Brycon amazonicus, on their reproductive performance and on the growth and survival of the progeny. Broodstocks were distributed in 8 earthen tanks (15 fish/tank) and fish from 4 tanks were fed daily (G1) while fish from the other 4 tanks were fed for 3 days and not fed for 2 days (G2) during 6 months prior to...

Metazoan parasites of Brazilian menhaden Brevoortia aurea (Spix & Agassiz, 1829) (Osteichthyes: Clupeidae) from the coastal zone of the State of Rio de Janeiro, Brazil.

Ultrastructure of the germ cells in the testis of matrinxã, Brycon cephalus (Teleostei, Characidae).

This study describes at ultrastructural level the germ cells in the testis of matrinxã (Brycon cephalus) raised in captivity. The specimens 'matrinxã' were maintained in four breeding tanks of 200 m(2), at the Aquaculture Research Center at Vale do Ribeira-CEPAR, from Fishery Institute, in Pariquera-Açu City, São Paulo, Brazil. The samples were collected from March 1994 to February 1996. The te...

Pedagogical mediation using the virtual learning environment and the new generation: A search for improved performance in medical education

Introduction: Medical schools face increasing challenges toaccommodate new health care needs. However, little has changedregarding the students’ education. In addition, educators face thechallenge of improving their teaching approach, making it suitableand effective for the new generation. The purpose of this work wasto describe and contextualize the application of active pedagogicalmethodologi...