In a factorial design study involving the determination of F- by ion-selective electrodes, a significant interference was demonstrated for Fe, with an even more pronounced interference for Al. The fluoride leaching procedure ...

Lettuce (Lactuca sativa) seeds play a significant role in toxicity tests of isolated chemicals, pesticides, and environmental samples. Commonly, the main variables under study are the rate of seed germination and root ...

The demand for simple and rapid bioassays in ecotoxicological evaluations is of paramount importance in order to speed upenvironmental monitoring programs. In this study we performed bioassays with lettuce seeds and two ...

The southern area of the Patos Lagoon estuary has been subjected to intense industrial and port-related activities which have not only caused meaningful changes in the landscape but also degraded aquatic resources by ...

For marine cnvironmcnlS whcrc aggrcgalcs arc composed of ~ 50 % organic matLer. various panunctcrs relevant to aggregation arc quanlified and compared with those in other aggregation regirnes. Sorne possible environrnental ...

Understanding temporal patterns of marine mammal occurrence is useful for establishing conservation strategies. We used a 38 yr-long dataset spanning 1976 to 2013 to describe temporal patterns and trends in marine mammal ...

An enclosure experiment in the Patos Lagoon estuary, southern Brazil (32°S, 52°W) investigated the response of phytoplankton to the enhancement of mesozooplankton and fish abundance. Addition of nutrients (NO3 − and ...

Information about bacterial community structure and functioning in fish farming ponds remains scarce, mainly due to methodological difficulties in counting and identifying uncultured bacteria. The main objective of ...

This study evaluated the spatial and temporal variability of the fungi and yeasts in the waters of the estuarine region of the Patos Lagoon and the adjacent oceanic Cassino Beach. Water samples was sampled monthly (March ...

White spot syndrome virus (WSSV) is considered the most threatening infectious agent in shrimp aquaculture. Since its fi rst occurrence in 1992, this pathogen has caused economic losses approach one billion ...

O objetivo deste estudo foi avaliar o efeito de altas densidades de estocagem na sobrevivência, crescimento e na taxa de conversão alimentar de camarões Litopenaeus vannamei, na fase final de engorda em sistema de ...

The effect of biofilm was assayed for Farfantepenaeus brasiliensis postlarvae fed with commercial pellets. Indoor tanks in a zero water exchange system were used, considering: shrimp fed with biofilm and commercial feed ...

The Patos Lagoon estuary is a microtidal system that is strongly regulated by atmospheric forces, including remote large-scale phenomena such as the El Niño Southern Oscillation (ENSO), which affects precipitation ...

Produced water (PW), extracted as a petroleum byproduct, presents high contents of impurities and, therefore, must be treated before being released into the environment. This clean-up process increases oil production costs. ...

The harvesting of microalgae is currently one of the bottlenecks hindering the commercial production of microalgae-based biofuels and products. The objective of this study was to determine the best flocculant and its ...

This study compared open-air and semi-enclosed production system of the marine microalgae Nannochloropsis oculata in a sub-tropical region (32 S; 52 W) under uncontrolled environmental conditions. The semi-enclosed system ...

Séries temporais de medições ambientais são essenciais para detectar, medir e compreender mudanças no sistema terrestre e suas comunidades biológicas. Séries observacionais acumularam-se ao longo das últimas 2 a 5 décadas ...