Results 101 to 110 of about 304 (125)
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Toxic effects of DDT and methyl mercury on the hepatocytes from Hoplias malabaricus
Toxicology in Vitro, 2008Here, we examined the impact of dichlorodiphenyltrichloroethane (DDT) and monomethyl mercury (MeHg) on the redox milieu and survival of hepatocytes from Hoplias malabaricus (traíra). After isolation and attachment of cells, we established one control and four treatments: DDT (50nM of DDT), MeHg I (0.25microM of MeHg), MeHg II (2.5microM of MeHg) and ...
F, Filipak Neto +5 more
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Genotoxic evaluation of different doses of inorganic lead (PbII) in Hoplias malabaricus
Environmental Monitoring and Assessment, 2008Different genetic biomarkers have been used to evaluate the pollution effects of mutagenic agents such as metals and also a great variety of chemicals delivered on the environment by human activities. This way, the aim of the present report was to evaluate the effects of inorganic lead in fishes through the frequency of piscine micronuclei and nuclear ...
W A, Ramsdorf +4 more
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Feeding of Hoplias malabaricus in the wetlands of Dulce river (Córdoba, Argentina)
Hydrobiologia, 1995Hoplias malabaricus behaves as a zoophagous and euryphagic species with a strong tendency to eat fish during its entire life. Fish begin to constitute its main food at approximately 200 mm standard length. Insects are important for fish smaller than 50 mm. Crustaceans are of lesser importance for both size groups.
María de los Angeles Bistoni +2 more
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Journal of Fish Biology, 2011
Cytogenetic markers were used to compare the karyotypes of an isolated population of Hoplias malabaricus with others previously described. The results revealed peculiar characteristics that indicate a new independent evolutionary unit within the H. malabaricus complex.
Valente Gt, Cesar Martins
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Cytogenetic markers were used to compare the karyotypes of an isolated population of Hoplias malabaricus with others previously described. The results revealed peculiar characteristics that indicate a new independent evolutionary unit within the H. malabaricus complex.
Valente Gt, Cesar Martins
exaly +4 more sources
Contracaecum sp. infection in Hoplias malabaricus (moncholo) from rivers and marshes of Colombia
Veterinary Parasitology, 2006Nematode infection indices were recorded in Hoplias malabaricus captured in six different rivers and a marsh belonging to the North Coast Basin of Colombia, and from the Amazon River, during February 2003-December 2004. Preliminary morphological analysis of nematodes indicated the presence of Contracaecum sp.
Jesús, Olivero-Verbel +5 more
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Respiration Physiology, 1999
To determine the location and distribution of chemoreceptors involved in the cardiovascular and respiratory responses to hypoxia of traira (Hoplias malabaricus), we measured heart rate, arterial blood pressure, ventilation frequency and amplitude of opercular movements during exposure to hypoxia and application of NaCN to either water bathing the gills
L I, Sundin +4 more
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To determine the location and distribution of chemoreceptors involved in the cardiovascular and respiratory responses to hypoxia of traira (Hoplias malabaricus), we measured heart rate, arterial blood pressure, ventilation frequency and amplitude of opercular movements during exposure to hypoxia and application of NaCN to either water bathing the gills
L I, Sundin +4 more
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The X1X2Y sex chromosome system in the fish Hoplias malabaricus. II. Meiotic analyses
Chromosome Research, 1998The neotropical fish Hoplias malabaricus shows diversified cytotypes and may represent a group of distinct species. One of these cytotypes is characterized by 2n = 40 and 2n = 39 chromosomes in females and males, respectively, with a multiple sex chromosome system of the X1X1X2X2/X1X2Y type.
L A, Bertollo, C A, Mestriner
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Henneguya malabarica sp. nov. (Myxozoa, Myxobolidae) in the Amazonian fish Hoplias malabaricus
Parasitology Research, 1996Henneguya malabarica sp. nov. is described from the Amazonian teleost fish Hoplias malabaricus Boch, 1794, collected from the estuarine region of the Amazon river near Belém, Brazil. Plasmodia were represented by several vegetative nuclei, generative cells, and sporogony stages contained in cyst-like plasmodia.
C, Azevedo, E, Matos
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Morphological and Molecular Alterations in the Gonads of
ABSTRACT Mining is one of the most important activities in the economic development of several countries; however, it generates significant impacts on water resources, releasing metals in these environments. The exposure of fish to metals alters the redox capacity of the organism, increasing the production of ...
Breno Thuller +4 more
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