We present data on age composition and sexual size dimorphism (SSD) of albatrosses, petrels and shearwaters in southern Brazil for 301 birds of 14 species captured live at sea. The pelagic community of seabirds off Brazil ...

The community of Charophytes in the Imboassica coastal lagoon in Brazil (22◦ 24_ S and 42◦ 42_ W) sometimes occupies almost the entire benthic region, and presents a large variation in C:N:P ratio. The effect of drawdown ...

This investigation of the aquatic macrophyte Eleocharis mutata (L.) Roem. Et Schult. was carried out in Imboassica lagoon, a coastal lagoon in Macaé (22_500S; 44_420W), in the northern part of Rio de Janeiro, Brazil. The ...

Responses of biochemical biomarkers were evaluated in gills of immature adult mangrove oyster Crassostrea rhizophorae collected in three estuarine regions along the Brazilian coast. In each region, ten oysters were collected ...

Seven pairs of southern elephant seals (Mirounga leonina) pups and their dams were sampled during the late weaning season among a breeding population of seals on Elephant Island in Antarctica. The blubber of the pups and ...

Dissolved organic matter (DOM) is defined as the organic matter that passes through a 0.45 μm-mesh filter. Recent studies have shown the DOM importance in mitigating trace metals and organic pollutants toxicity. In general, ...

Imboassica lagoon is an urban coastal lagoon located in the municipality of Macaé (RJ), which has been exposed to a process of artificial eutrophication through the inflow of untreated sewage, as well as artificial openings ...

Endocrine disruptors (EDs) are increasingly common chemicals in the environment. Bisphenol A (BPA), used to manufacture polycarbonate plastics, is an ED recognized for its estrogenic, anti-estrogenic, and anti-androgenic ...

Eighteen enzyme systems were examined in Ilex paraguariensis St. Hil. using starch gel electrophoresis. Seven out of 12 active isozyme systems revealed one or more polymorphic loci (PGI, GOT, MR, G-6PDH, MDH, NDH, and 6- ...

The effects of H2O2 were evaluated in the estuarine worm Laeonereis acuta (Polychaeta, Nereididae) collected at the Patos Lagoon estuary (Southern Brazil) and maintained in the laboratory under controlled salinity (10 psu ...

This paper presents the results of a study on the clonal growth of Typha domingensis Pers. in the Imboassica lagoon, in the intervals between four drawdowns. Sampling was performed over a period of two years, from permanent ...

Cytogenetic studies were carried out in the fish, Hoplias malabaricus, from the Parque Florestal do Rio Doce (Brazil). This population is characterized by 2n 42 chromosomes for both males and females and an XX/XY sex ...

Parahemiurus merus é um hemiurideo amplamente distribuído e que normalmente infecta peixes pelágicos de regiões temperadas. Há alguns registros deste parasito em quetognatos. Seu ciclo de vida não é conhecido. Neste estudo ...

Chironomus calligraphus Goeldi, 1905 é considerada uma espécie típica de ambientes naturais e de águas tratadas residuais domésticas, sendo caracterizada como apropriada para utilização em ensaios ecotoxicológicos, na ...

A Lagoa Imboassica, Macaé, RJ, Brasil (22º50';44º42'W), vem sofrendo vários impactos antrópicos, destacando-se o lançamento de esgotos domésticos in natura e a abertura artificial da barra de areia que a separa do oceano. ...

Hoplias malabaricus, a widely distributed neotropical freshwater fish, shows a conspicuous karyotypic diversification. An overview of this diversity is presented here comprising several Brazilian populations, and some ...

The aim of this work was to monitor and study the hematocrit and weight of juvenile penguins, with and without oil cover, found alive along the southern coast of Brazil, after capture, as well as before eventual death or ...

The available chromosomal data on Hoplias malabaricus make possible the identification of three major karyotypic forms in this fish group, all of them bearing 2n=42 chromosomes, and named as Cytotypes A, B and E in previous ...

O metano (CH4) na atmosfera absorve radiação infravermelha (IV) e contribui para o aquecimento global. Considerando que este gás absorve 23 vezes mais radiação IV que o CO2, e que sua concentração aumentou 151% desde 1750, ...

Insetos aquáticos destacam-se em abundância de indivíduos em ambientes dulcícolas de Rio Grande, registrando Coleoptera como uma das ordens frequentemente encontradas, a qual é representada por espécies aquáticas e ...