Results 21 to 30 of about 251 (129)

Nitrogen excretion and oxygen consumption under severe hypoxia in siluriform fishes from the Amazon. [PDF]

open access: yesJ Fish Biol
Abstract Siluriform fishes collected from the Rio Negro and Rio Solimões proved to be highly resistant to aquatic hypoxia. In all four species analysed in this study, aquatic oxygen consumption significantly decreased from normoxic levels at water PO2 values near 1 kPa. Air‐breathing activity was observed only in Sturisoma sp. (Rio Negro).
Pelster B, Wood CM, Val AL.
europepmc   +2 more sources

Comparative histology in the liver and spleen of three species of freshwater teleost [PDF]

open access: yesNeotropical Ichthyology, 2017
We describe and compare the histology of liver and spleen ofGeophagus brasiliensis (Perciformes), Hypostomus francisci (Siluriformes) and Hoplias aff. malabaricus (Characiformes), tropical freshwater fishes. InG. brasiliensisandH. aff.
Camila F. Sales   +6 more
doaj   +3 more sources

Reproductive dynamics and population structure of Hoplias aff. malabaricus (Bloch, 1794) (Characiformes, Erythrinidae) in the dam lake of the Taperoá River Basin, Paraíba [PDF]

open access: greenBiotemas, 2009
This work aims to verify the reproductive dynamics and growth of the Hoplias aff. malabaricus species in the Taperoá II dam lake (07º11’44”S, 07º13’44”S), located in the basin of the River Taperoá in the Cariri region of Paraiba.
Maria Cristina Crispim   +3 more
doaj   +1 more source

CONDITION of Hoplias aff. malabaricus (BLOCH, 1794) IN TWO COASTAL STREAMS of ITANHAEM RIVER BASIN, BRAZIL

open access: green, 2009
The main purpose of this research was to measure the condition of the fish species Hoplias aff. malabaricus collected in Aguapeu River (black waters) and Branco River (white waters), which belong to Itanhaem River basin, a coastal watershed in São Paulo ...
Evandro Bonocchi de Sant'Anna   +1 more
core   +4 more sources

The fish fauna in tropical rivers: The case of the Sorocaba river basin, SP, Brazil

open access: yesRevista de Biología Tropical, 2003
A survey was carried out on the fish species in the Sorocaba River basin, the main tributary of the left margin of the Tietê River, located in the State of São Paulo, Brazil. The species were collected with gill nets.
Welber Senteio Smith   +2 more
doaj   +1 more source

Using the swimbladder as a respiratory organ and/or a buoyancy structure—Benefits and consequences

open access: yesJournal of Experimental Zoology Part A: Ecological and Integrative Physiology, Volume 335, Issue 9-10, Page 831-842, November 1, 2021., 2021
Graphical abstract Abstract A swimbladder is a special organ present in several orders of Actinopterygians. As a gas‐filled cavity it contributes to a reduction in overall density, but on descend from the water surface its contribution as a buoyancy device is very limited because the swimbladder is compressed by increasing hydrostatic pressure.
Bernd Pelster
wiley   +1 more source

Metazoários Endoparasitas de Hoplias aff. malabaricus Bloch, 1794 (Characiformes: Erythrinidae) do Rio Araguaia, Tocantins, Brasil

open access: diamond
The trahira is a food fish that can harbor parasites that cause zoonoses. In order to inventory the helminths parasitizing Hoplias aff. malabaricus Bloch, 1794 (Actinopterygii: Erythrinidae) from the Araguaia River, Araguanã city, Tocantins, Brazil, 50 ...
Thássia Silva Reis   +6 more
openalex   +3 more sources

Population structure, abundance and distribution of three species of the Hoplias aff. malabaricus complex in the Upper Paraná river floodplain, PR/MS.

open access: green, 2010
Hoplias aff. malabaricus presents one of the largest diversities karyotypic inter and intrapopulational, and three species of that complex in the Upper Paraná river floodplain have been identified: two natives (Hoplias sp.2 and Hoplias sp.3) and one ...
Marília Hauser Dos Santos
core   +3 more sources

Estudo taxonômico e ecológico de Monogenea (Platyhelminthes) parasitos de brânquias de Hoplias aff. malabaricus (Boch, 1794) (Pisces, Erythrinidae) na planície de inundação do alto rio Paraná, Brasil [PDF]

open access: green, 2012
Orientador: Prof. Dr. Ricardo Massato TakemotoDissertação (mestrado em Biologia Comparada) - Universidade Estadual de Maringá, 2012Entre os vertebrados mais parasitados estão os peixes, isto se dá provavelmente pelas peculiaridades existentes no meio ...
Rodrigo Junio da Graça
openalex   +2 more sources

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