26 documents found, page 1 of 3

The microalga Dunaliella and its applications: a review

and industry. The high adaptability of Dunaliella to high salinity, as well as its fast growth and production of several metabolites have triggered interest. The attention of industry relates to its ability to synthesize several high-value compounds, such as β-carotene, lipids, glycerol, vitamins, and proteins. In addition, due to its tolerance to high salinity, contamination is reduced, and it can grow in open...

Binomial transformation applied to presence-absence community data

Community data is often transformed or standardized to meet the requirements and assumptions of multivariate analysis. While these methods are usually appropriate for abundance data, they are seldom applied to presence absence data. Here, a method of transforming a binary matrix using the binomial probability is described. Number of trials (n), number of successes (x) and probability of success (p) are necessar...

A importância de atividades investigativas sobre a monitorização dos parâmetros...

Num contexto de alterações climáticas é importante consciencializar a comunidade para o impacto destas nos oceanos. O objetivo deste estudo foi compreender o efeito da participação de alunos do 1º e 2º Ciclos do Ensino Básico em atividades multidisciplinares sobre a importância da monitorização dos parâmetros físico-químicos da água do mar, no desenvolvimento de competências. As atividades tiveram diferentes fo...

Ecological features of a rocky intertidal community exposed to sewage effluent

Sewage is among the largest components of coastal pollution, showing a variable scale and size when causing an impact. In this study, temporal and spatial sewage-related gradients were identified using univariate and multivariate methods. Phosphates and nitrogen-based nutrients, except nitrate, were associated to sewage. Abundance and species richness decrease with distance from the sewage outfall while evennes...

Impact of aqueous extract of arbutus unedo fruits on limpets (Patella spp.) pât...

Limpets are molluscs widely used in food diet and much appreciated in many regions. The consumption of fishery products rich in polyunsaturated fatty acids has been increasing through filleted products and restructured products. Since food oxidation is the major cause of nutritional quality deterioration in fish products, the interest in the replacement of synthetic antioxidants with natural sources, namely in ...

Does lack of knowledge lead to misperceptions? Disentangling the factors modula...

Identifying sources of variability in public perceptions and attitudes toward sharks can assist managers and conservationists with developing effective strategies to raise awareness and support for the conservation of threatened shark species. This study examined the effect of several demographic, economic and socioenvironmental factors on the quality of knowledge about and perceptions toward sharks in two cont...

Maintenance of two-spotted goby, Gobiusculus flavescens (Fabricius, 1779) (Perc...

The survival and growth of semipelagic two-spotted goby (Gobiusculus flavescens) were investigated in the laboratory to appreciate the ability of this species to be kept in captivity as a resource for ornamental fishkeeping. The survival of individuals was tested under three temperatures (23°C, 25°C and 27°C) during 12 days. The growth of individuals was tested using two diets: Diet 1-“SERA ®vipan” + “SERA® dis...

Using biomarkers to address the impacts of pollution on limpets ( Patella depre...

Contaminant discharges, derived from human activities, are major concerns as they exert a continuous ecological pressure on aquatic systems, causing in fact cascading community effects. Although with associated ecological and fitness costs, physiological and biochemical defense mechanisms may restore the organism’s internal balance. Several studies have pointed biomarkers as tools to assess contamination levels...

Modulation of different kelp life stages by herbivory: compensatory growth vers...

Partitioning the efects of herbivory on diferent life stages of primary producers is key to understanding the population-wide consequences of herbivory. We assessed the performance of microscopic (MiS <1 mm) juveniles, macroscopic (MaS) juveniles and adult kelp (Laminaria ochroleuca) under contrasting herbivory regimes through a herbivore exclusion feld experiment. The abundance of MiS and the survival of MaS d...

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