The objective of this work was to evaluate mechanisms of microcystin toxicity on crustacean species. Adult male crabs of Chasmagnathus granulatus (13.97"0.35 g) acclimated to low salinity (2‰) were injected with saline ...

Microcystins are toxins produced by cyanobacteria, being toxic to aquatic fauna. It was evaluated alternative mechanisms of microcystins toxicity, including oxidative stress and histopathology in the hepatopancreas of the ...

Daphnids (Daphnia magna) were exposed to AgNO3 at 0.303 6 0.017 mg silver/L (46.9% as Ag1), in the absence of food, in moderately hard synthetic water under static conditions for up to 48 h. Results from accumulation ...

Juvenile pink-shrimp Farfantepenaeus paulensis were exposed (75 days) to NH3 (0.016–0.287 mg L−1) under static condition with water renewal every 24 h. Experiments were performed at 20 °C, at a water salinity of 15 ppt, ...

The possibility of detecting aquatic pollution problems to take corrective decisions is intimately related to the organization levels of the living matter. Measurements at the biochemical or physiological levels detect ...

Antioxidant enzymes, total antioxidant capacity (TOSC) and concentration of reactive oxygen species (ROS) were measured in anterior (A), middle (M) and posterior (P) body regions of Laeonereis acuta after copper (Cu; 62.5 ...

The effect of water salinity and ions on metallothionein-like proteins (MTLP) concentration was evaluated in the blue crab Callinectes sapidus. MTLP concentration was measured in tissues (hepatopancreas and gills) of crabs ...

Two silver-contaminated diets were prepared by exposing juvenile rainbow trout for 8 d to waterborne silver thiosulfate as Ag at either 0.1 mg/L (low-Ag diet) or 80 mg/L (high-Ag diet). The level of total Ag accumulated ...

They are registered for the first time in the South Brazilian coast, the crabs Milhrax hispidlls (Herbst, 1790) and Milhrax lorillgae Rathbun, 1920, which previous Southern limit of di stribution were at Siio Paulo State ...

The Hepatus pudibundus (Herbst, 1785) juvenile development was studied in laboratory, under the morphological and systematical stand points. The eight early juvenile stages were obtained from larvae hatched from eggs of ...

The study of Chasmagllalhus granulara Dana 1851 was done with the setae morphology point ofview. The main objective ofthis description was to find differents kinds af morphologicals types of setae. During this ...

The genus Hexapanopeus Rathbun, 1898 contains eight species, of which three are found in the Brazilian coast. The larval development of two of these species has already been studied in the laboratory. This article describes ...

The dissolved organic matter, especially carbohydrates, released by phytoplanktonic organisms may be ecologically important, through its influence on carbon cycling and microbial diversity. Here axenic cultures of three ...

Studies were carried out to investigate the effect of temperature, salinity, ammonia, nitrite and nitrate on food consumption of pink shrimp Farfantepenaeus paulensis. Juveniles (0.2 – 0.4g) were acclimated for 15 days in ...

Flounder, Paralichthys orbignyanus (Valenciennes), were captured in polluted and non-polluted sites within the Patos Lagoon Estuary, southern Brazil, over four seasons. Blood films showed a high prevalence of infection ...

The concentration-dependent kinetics and main mechanisms of whole-body Na+ uptake were assessed in neonate and adult water flea Daphnia magna Strauss acclimated to moderately hard water (0.6mmoll–1 NaCl, 1.0•mmol•l–1 CaCO3 ...

Este ensaio teórico tem como objetivo ressaltar a importância a ser dada pelo enfermeiro à questão ambiental e, especificamente, à poluição ambiental, no planejamento e implementação de ações de saúde, no que se refere à ...

The Lagoa do Peixe ("Peixe's Lagoon") is located between Atlantic Ocean and Lagoa dos Patos and is 30 Km long and 0,5-2,0 Km wide (31 °13 ' S, 50055'W -3 10 26'S, 51009' ). For one year, the composition and distribution ...

This papel' describes the first nine juvenile stages of CyrtogropslIs angll/atus Dana, 1851 obtained in laboratory conditions trom three ovigerous females collected at "Molhes da Barra", Rio Grande, Brazil (32°S and 52°W). ...

The South American sea lion, Otaria flavescens, is widely distributed along the Pacific and Atlantic coasts of South America. However, along the Brazilian coast, there are only two nonbreeding sites for the species (Refúgio ...