Neste estudo procurou-se determinar quais fatores controlam a abundância de bactérias livres (BL) e aderidas a partículas (BA) em nove lagos presentes no Campus Carreiros da FURG, na região sul da planície costeira do Rio ...

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 ...

Um dos maiores problemas enfrentados na aquicultura é a deterioração da qualidade da água das criações e dos ambientes receptores. Para minimizar esse problema em criações de peixes e camarões com limitada renovação de ...

Com o incremento da aquicultura, os impactos negativos sobre o meio ambiente tendem a se intensificar. O maior problema ambiental da aquicultura está relacionado aos efluentes com grande potencial de poluição das águas ...

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 ...

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 ...

A field study of the microbial food web was conducted in a shallow region of the Patos Lagoon estuary (32°07′S; 52°06′W) between March 1989 and March 1990. On average, bacterial biomass (mainly attached bacteria) constituted ...

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 ...

This study aimed to evaluate the effects of adding guar gum, a non-starch polysaccharide, to the diet of Mugil liza juveniles. The juveniles (mean weight = 0.38 ± 0.01 g) were fed one of three diets with increasing ...

We measured the vertical and seasonal distribution of picoplankton (0.2–2 μm) and nanoplankton (2–20 μm) in the photic layer of Cuban southern oceanic and coastal waters. The concentration of the different fractions was ...

We measured the vertical and seasonal distribution of picoplankton (0.2–2 µm) and nanoplankton (2–20 µm) in the photic layer of Cuban southern oceanic and coastal waters. The concentration of the different fractions was ...

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 ...

Entre novembro e dezembro de 2002 foi realizado um experimento na Estação Marinha de Aqüicultura - EMA/FURG, Rio Grande - RS/Brasil, durante a larvicultura do camarão-rosa Farfantepenaeus paulensis. Substratos artificiais ...

Uma das principais preocupações em sistemas de cultivo é o acúmulo de produtos nitrogenados, especialmente amônia (NH4). A troca de água de tanques, bem como a adição de fitoplâncton, são algumas das técnicas empregadas ...

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 ...

The effect of biofilm as an alternative food source and/or a complement for improving culture was assayed for early and advanced juveniles of Cherax quadricarinatus. For both kinds of juveniles, higher values of survival ...

The nutritional quality of biofilm, a microbial community associated to an organic matrix, was evaluated in artificial substrate (polyethylene screen) in net cages during 30 days in the Patos Lagoon estuary, Southern Brazil. ...

Culture collections of microalgae represent a biological resource for scientific research and biotechnological applications. When compared to the current methods of maintenance and sub-culturing, cryopreservation minimizes ...

The surf-zone diatom Asterionellopsis glacialis (Castracane) Round attains extremely high abundances (up to 109 cells l–1) and chl a concentrations (up to 1.5 mg chl a l–1), forming darkbrown patches in Cassino Beach, ...

This work compared the use of dextrose and molasses as carbon sources for biofloc development, water quality maintenance, microorganism composition and growth performance of Litopenaeus vannamei juveniles in biofloc ...