Results 61 to 70 of about 122 (86)

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

Tissue and Cell, 1999
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.
E, Romagosa, M Y, Narahara, M I, Borella, S F, Parreira, N, Fenerich-Verani   +4 more
openaire   +2 more sources

Hematological responses of the Neotropical teleost matrinxã (Brycon cephalus) to environmental nitrite

Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology, 2004
Environmental increase in nitrite impairs the function of several aquatic species, including fishes. Nitrite reacts with hemoglobin yielding the non-functional methemoglobin (metHb), and many physiological disturbances can arise. The physiological mechanisms to cope with nitrite are still unclear in fish.
Ive M, Avilez, Alexandre E, Altran, Lúcia H, Aguiar, Gilberto, Moraes   +3 more
openaire   +2 more sources

Metabolical effects of Folidol 600 on the neotropical freshwater fish matrinxã, Brycon cephalus

Environmental Research, 2004
The neotropical freshwater fish matrinxã, Brycon cephalus (Günther, 1869), was exposed to 1/3 of 96 h-LC50 of Folidol 600 (methyl parathion) for 96 h and allowed to recover for 24, 48, 96, and 192 h. Acetylcholinesterase (AChE), alanine aminotransferase (ALAT), aspartate aminotransferase (AAT), lactate dehydrogenase (LDH), malate dehydrogenase (MDH ...
Lucia Helena, de Aguiar, Gilberto, Moraes, Ive Marchioni, Avilez, Alexandre Eneas, Altran, Cristina Ferro, Corrêa   +4 more
openaire   +2 more sources

Transport stress in matrinxã, Brycon cephalus (Teleostei: Characidae), at different densities

Aquaculture International, 2002
Matrinxa, Brycon cephalus, is a nativeteleost fish from the Amazon Basin, and is of economic importance forcultivation for food and sport in Brazil. Mortality losses due to handling andtransport of this stenohaline freshwater species are common. The effects oftransportation at different densities on the biochemical stress responses ofmatrinxa (mean ...
Carneiro, PCF, Urbinati, Elisabeth Criscuolo   +1 more
openaire   +2 more sources

Metabolic responses of matrinxã (Brycon cephalus) to dietary protein level

Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2005
Effects of increasing dietary protein were studied in matrinxa, (Brycon cephalus), an omnivorous teleost from the Amazon Basin in Brazil. Four isocaloric diets were formulated to contain 20%, 27%, 34% and 41% of crude protein (CP). Plasma glucose levels were significantly increased while triacylglycerols were significantly reduced at 41% of CP.
Vânia Pimentel, Vieira, Luis Antonio Kioshi, Inoue, Gilberto, Moraes   +2 more
openaire   +2 more sources

Loading and transport stress of juvenile matrinxã (Brycon cephalus, Characidae) at various densities

Aquaculture, 2004
Abstract Physiological responses of matrinxa juveniles were determined after the procedures of capture, loading and 4-h transportation at densities of 83, 125 and 166 g l −1 . The experiment was carried out during the regular procedures of the local hatcheries, repeating the real conditions of transportation.
Elisabeth Criscuolo Urbinati, Janessa Sampaio de Abreu, Antônio Cleber da Silva Camargo, Miguel Angel Landinez Parra   +3 more
openaire   +1 more source

Metabolical changes induced by chronic phenol exposure in matrinxã Brycon cephalus (teleostei: characidae) juveniles

Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology, 2006
Phenol and its derivatives are xenobiotics present in many industrial wastewaters and in non-specific pesticides. It is a lipophilic compound and, therefore, accumulates along the trophic chain. Phenol is often found in marine and fresh water environments.
Tiago Silvestre Fernandes, Hori, Ive Marchionni, Avilez, Luis Kioshi, Inoue, Gilberto, Moraes   +3 more
openaire   +2 more sources

Effects of dietary aflatoxin on biochemical parameters and histopathology of liver in Matrinxã (Brycon cephalus) and Pacu (Piaractus mesopotamicus) fish

World Mycotoxin Journal, 2021
The objective of this study was to evaluate biochemical parameters and histopathology of liver in Matrinxã (Brycon cephalus) and Pacu (Piaractus mesopotamicus) fish chronically exposed to dietary aflatoxins. Fish feed was artificially contaminated with aflatoxins and the treatments were: Control – feed without toxin; Treatment A – feed + 10 μg ...
E. C. Michelin, C. M. Bedoya-Serna, L. C. S. Carrion, N. Levy-Pereira, F. S. Cury, D. Passarelli, C. G. Lima, G. S. Yasui, R. L. M. Sousa, A. M. Fernandes   +9 more
openaire   +1 more source

Light and electron microscopy oogenesis in matrinxã, Brycon cephalus.

Journal of submicroscopic cytology and pathology, 2003
Oocyte development has been divided into 5 distinct stages in the reared matrinxã, Brycon cephalus, based on morphological criteria by light and transmission electron microscopy: I) chromatin-nucleolus; II) perinucleolar; III) cortical alveoli; IV) vitellogenesis; V) final maturation.
E, Romagosa, M I, Borella, M Y, Narahara, N, Fenerich-Verani   +3 more
openaire   +1 more source

Effect of stocking density on water quality, survival, and growth of larvae of the matrinxã, Brycon cephalus (Characidae), in ponds

Aquaculture, 2000
Experiments were carried out in nine 64 m2 ponds at CEPTA/IBAMA over a period of 21 days in order to evaluate the effect of stocking density (StD) on survival and growth of larvae of matrinxa, Brycon cephalus. The larvae were randomly divided into treatments of 30, 60 and 120 larvae m2 (three replicates per treatment) and fed three times a day. Samples
L.C Gomes, B Baldisserotto, J.A Senhorini   +2 more
openaire   +1 more source