Results 31 to 40 of about 1,794 (127)

Population genetic structuring in pacu (Piaractus mesopotamicus) across the Paraná-Paraguay basin: evidence from microsatellites [PDF]

open access: yes, 2009
The Paraná-Paraguay basin encompasses central western Brazil, northeastern Paraguay, eastern Bolivia and northern Argentina. The Pantanal is a flooded plain with marked dry and rainy seasons that, due to its soil characteristics and low declivity, has a ...
CALCAGNOTTO, Daniela, DESALLE, Rob
core   +1 more source

Length-weight and length-length relationship for three marine fish species of commercial importance from southwestern Atlantic Ocean coast [PDF]

open access: yes, 2020
Length-weight (LWR) and length-length (LLR) relationships were described for three marinefish  species  Odontesthes  argentinensis  (Valenciennes,  1835),  Urophycis  brasiliensis  (Kaup,  1858)  andBrevoortia aurea (Spix & Agassiz, 1829) from the ...
Biolé, Fernanda Gabriela   +2 more
core   +1 more source

Alterations in the Gill Filaments and Secondary Lamellae of Cirrhinus mrigala Exposed to “Nuvan,” an Organophosphorus Insecticide

open access: yesJournal of Histology, Volume 2014, Issue 1, 2014., 2014
The alterations in the epithelium of the gill filaments and the secondary lamellae of the gills of Cirrhinus mrigala, on exposure to “Nuvan,” have been explored in the present investigation using light and scanning electron microscopy. The fishes were exposed to two sublethal concentrations, 5 mg/L and 15 mg/L, of “Nuvan.” The changes are more rapid ...
Nidhi Srivastava   +5 more
wiley   +1 more source

Alimentação de Hoplias aff malabaricus (Bloch, 1794) e Oligosarcus robustus Menezes, 1969 em uma lagoa sob in?uência estuarina, Pelotas, RS

open access: yesBiotemas, 2009
Alimentação de Hoplias aff. malabaricus (Bloch, 1794) e Oligosarcus robustus Menezes, 1969 em uma lagoa sob in?uência estuarina, Pelotas, RS. O objetivo do presente trabalho foi o de estudar a dieta de Hoplias aff.
Fabiano Corrêa   +1 more
doaj   +1 more source

Otolith and vertebral morphology of marine atherinid species (Atheriniformes, Atherinopsidae) coexisting in the southwestern Atlantic Ocean

open access: yesCiencias Marinas, 2010
Studies on marine ecosystems rely on the identification of fish prey species of piscivores (fish, aquatic mammals, and aquatic birds) based on their bones and otoliths. The stomach contents of piscivores show predation on marine atherinids of commercial
A D Tombari   +3 more
doaj   +1 more source

Feeding habits of the flounder Paralichthys orbignyanus (Valenciennes, 1842) in a shallow coastal lagoon of the southern Atlantic Ocean: Rocha, Uruguay

open access: yesCiencias Marinas, 2004
 A total of 293 stomachs of adult flounders, Paralichthys orbignyanus, were analyzed from the catch of artisanal fisheries that operate in Rocha Lagoon, Uruguay.
Walter Norbis, Oscar Galli
doaj   +1 more source

Feeding of Hoplias aff. malabaricus (Bloch, 1794) and Oligosarcus robustus Menezes, 1969 in a lagoon under estuarine influence, Pelotas, RS [PDF]

open access: yesBiotemas, 2009
The objective of the present paper was to study the diets of Hoplias aff. malabaricus and Oligosarcus robust in “Pequena Lagoon” and evaluate the importance of estuarine organisms in the feeding of freshwater fish.
Fabiano Corrêa   +1 more
doaj  

Análisis poblacional morfométrico y genético, áreas de solapamiento y distribución de los pejerreyes de la Provincia Parano-Platense (Atheriniformes, Atherinopsidae) [PDF]

open access: yes, 2020
Para la Argentina, han sido citadas cinco especies continentales del género Odontesthes: O. bonariensis, O. hatcheri, O. humensis, O. perugiae y O. retropinnis.
Cuello, Mariela Vanesa
core   +1 more source

Concentração letal (CL50) de amônia não ionizada para larvas de peixe-rei em exposição aguda [PDF]

open access: yes, 2006
Ammonia results from decomposition of effluents organic matter, e.g. feed wastes and fish faeces. Its un-ionized form can be toxic because diffuses easily through fish respiratory membranes, damaging gill epithelium and impairing gas exchanges.
Cardoso, Daniela Fençon   +3 more
core   +2 more sources

Organização trófica da assembleia de peixes de uma lagoa costeira subtropical, Santa Catarina, Brasil [PDF]

open access: yes, 2013
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-graduação em Ecologia, Florianópolis, 2013O presente estudo teve como objetivo investigar a organização trófica da assembleia de peixes da ...
Sticca, Sarah Carvalho
core  

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