Este trabalho teve como objetivo avaliar a variação da biomassa de Potamogeton pectinatus L. (Potamogetonaceae), na Lagoa Verde, em função de parâmetros abióticos. Foram realizadas medidas diárias da profundidade, temperatura, ...

The goal of this work was to test if the macro and micro morphological analysis of the leaf surface could provide vegetative diagnostic characters for some of the most common Lauraceae species in Southern Brazilian Seasonal ...

The Plata pompano Trachinotus marginatus inhabits the surf zone of sandy beaches in Southern Brazil. Increasing copper concentrations have been reported in this ecosystem likely associated with the growing industrial and ...

O sistema de degradação utilizando ferro metálico e peróxido de hidrogênio (reação de Fenton) foi empregado para a degradação do herbicida diurom. Visando obter as melhores condições de degradação, foram otimizados parâmetros ...

Censuses of the Neotropic Cormorant (Phalacrocorax brasilianus) were carried out at a power tower near the mouth of Lagoa dos Patos estuary, southern Brazil, from November 2001 to October 2002. At this major roosting site, ...

Serum immunoglobulin G (IgG; indirect enzyme-linked immunosorbent assay), as well as sexual and adrenal steroid hormones’ concentrations (radioimmunoassay) were determined in 63 (male and female) Southern elephant seals ...

Mature Brazilian flounders Paralichthys orbignyanus were captured in coastal southern Brazil and their reproduction in captivity was studied. Brazilian flounder will spawn naturally in captivity when the water temperature ...

The protective effects of sulfide and water hardness against acute and chronic silver toxicity in Daphnia magna were assessed in the presence of food. Results showed that both sulfide and water hardness protected against ...

This work was undertaken between March 1997 and February 1998 and aimed at verifying the frequency of utilisation of resting sites by the neotropical river otter (Lutra longicaudis). The banks of a creek located at the ...

In the coastal region of the Rio Grande do Sul State, in southern Brazil, three areas were monitored to study the feeding habits of the neotropical river otter (Lontra longicaudis) using spraint analysis. The National Park ...

This study investigated the passive avoidance conditioning in zebrafish (Danio rerio). An instrument was developed for measuring escape responses triggered by a conditioned stimulus. This system allowed quantification of ...

Silymarin (SM), the active complex of milk thistle, is a lipophilic fruit extract and is composed of several isomer flavonolignans. Flavonoids are antioxidants found molecules capable of intercepting reactive oxygen species ...

A novel approach for statistical analysis of comet assay data (i.e.: tail moment) is proposed, employing public-domain statistical software, the R system. The analytical strategy takes into account that the distribution ...

Antioxidant responses and oxidative stress were evaluated in the hepatopancreas of the estuarine crab Chasmagnathus granulates (Decapoda, Brachyura) after oral microcystin administration. Responses were evaluated through ...

Microcystins are hepatotoxins suspected to generate oxidative stress. This mechanism was evaluated in gills of the estuarine crab Chasmagnathus granulatus (Decapoda, Brachyura). Adult male crabswere fed ground beef with ...

To determine the feeding habits of the Amazonian manatee Trichechus inunguis in some Central Amazonian Rivers and lakes, we compared plant epidermis found in the stomach contents and/or faeces of animals with a reference ...

Seasonal variations in body weight, food consumption and blood glucose, total lipids, urea, total proteins, albumin and globulins of captive Amazonian manatees, Trichechus inunguis, were determined. Body weight changed ...

Contamination of blubber tissues by organochlorine pesticides (OC) and PCBs was assessed in female and male pups and juveniles, as well as in adult females and subdominant adult males of the Southern elephant seal, Mirounga ...

The aim of the present study was to determine the kinetic parameters and cholinesterase (ChE) activity in two teleost fish, the White mouth croaker Micropogonias furnieri (Scianidae) and the Madamango sea catfish Cathorops ...

A genetic study of the neotropical river otter Lontra longicaudis (Olfers, 1818), which has an unknown conservation status, was carried out at the Taim Ecological Station and the margins of the Vargas stream, Rio Grande ...