Marisa Barata

Marisa Barata
Portuguese Sea and Atmosphere Institute | IPMA · Divisão de Aquacultura e Valorização

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60
Publications
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677
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Publications

Publications (60)
Article
Full-text available
The gut is the first organ to contact food, and it is often the target of nutrition studies performed on aquaculture fish. Histological analysis reveals morphological changes in fish intestines caused by ingredients in formulated feeds. However, this type of analysis is mainly based on a semi-quantitative approach, often restricted to specialized r...
Article
The ectoparasite Amyloodinium ocellatum is a dinoflagellate that causes severe morbidity and mortality in both brackish and marine warmwater aquaculture fishes worldwide. A. ocellatum has a triphasic life cycle based on a free-living flagellate (the dinospore), a parasitic stage (the trophont) and a resting and reproductive cyst (the tomont). Curre...
Article
Full-text available
The increasing frequency and duration of marine heatwaves (MHWs) due to climate change pose severe threats to aquaculture, causing drastic physiological and growth impairments in farmed fish, undermining their resilience against additional environmental pressures. To ensure sustainable production that meets the global seafood demand and animal welf...
Article
Full-text available
Simple Summary Fish welfare is an opportunity to improve the standards and quality of aquaculture products and is crucial to ensure the sustainability of the industry. Tryptophan is thought to mitigate fish response to stress. In this study, different dietary tryptophan contents were tested in meagre juveniles. The results suggest, particularly in...
Article
Full-text available
Cannibalism and intraguild predation of fish eggs are frequently observed for small and medium pelagic fish and can be an important cause of natural mortality. The European sardine Sardina pilchardus is the major predator of pelagic fish eggs in Atlantic Iberian waters. Estimates of egg mortality due to predation rely on a number of parameters that...
Article
Full-text available
Efforts have been made to find alternatives to fish meal (FM), as the sustainability of aquaculture depends on it. Insect meal (IM) is a potential candidate to partially replace FM, being more sustainable and economically viable. In this experimental trial, three diets were tested with different yellow mealworm incorporation: a control diet with no...
Article
Full-text available
Gilthead seabream (Sparus aurata) production is a highly valued aquaculture industry in Europe. The presence of skeletal deformities in farmed gilthead seabream represents a major bottleneck for the industry leading to economic losses, negative impacts on the consumers’ perception of aquaculture, and animal welfare issues for the fish. Although pas...
Article
After a meal, a sequence of physiological changes occurs in animals in response to digestion, absorption and assimilation of the ingested nutrients. These processes are very important for the aquaculture sector since they will define the efficiency by which food is converted into growth, thus contributing to reduce the production costs and also und...
Poster
Full-text available
Cannibalism and Intraguild predation of fish eggs are frequently observed for small pelagic fish and can be an important cause of mortality. Previous works have identified the european sardine (Sardina pilchardus) and the Atlantic chub mackerel (Scomber colias) as the major egg predators off Atlantic Iberian waters. A recent work estimated that 71%...
Article
Full-text available
Methionine and taurine are amino acids (AA) that are usually deficient when fish meal is replaced by plant proteins. In this study, three diets were tested in juvenile meagre (initial weight: 13.4 g) for 8 weeks. The D1 diet had 0.2% methionine and 1% taurine supplementation; the D2 and D3 diets had 0.6% methionine and 1% and 2% taurine supplementa...
Article
Full-text available
Efforts have been made to find natural, highly nutritious alternatives to replace fish meal (FM) and fish oil (FO), which can simultaneously promote fish health and improve the nutritional quality of filets for human consumption. This study evaluated the impact of biofortified diets containing microalgae (as replacement for FM and FO), macroalgae (...
Article
Fish fortification with iodine-rich macroalgae (Laminaria digitata) and Selenium-rich yeast is expected to promote nutritional added value of this crucial food item, contributing to a healthy and balanced diet for consumers. However, it is not known if steaming can affect these nutrient levels in fortified fish. The present study evaluates the effe...
Poster
Full-text available
Fish cultured in intensive farming conditions commonly develop severe skeletal deformities that affect both welfare and market value. Among the solutions proposed to improve the skeletal status of aquaculture fish, supplementation of their diet with natural compounds or extracts that stimulate skeletogenesis is increasingly seen as an economically...
Article
This study aimed to evaluate the modulatory effect of dietary taurine supplementation on protein turnover of meagre juveniles fed semi-purified plant-based diets. For that purpose, fish (3.2 ± 0.2 g) were fed with five isoproteic (61.2%), isolipidic (16.6%) and isoenergetic (21.9 kJ g⁻¹) experimental diets supplemented with 0.5% (Tau0.5), 1% (Tau1)...
Article
Full-text available
Histidine plays an important role in haemoglobin synthesis, antioxidant defence system and stress resistance, and it is thought to be a limiting amino acid in most meagre diets. In this study, two different diets, a control and a diet supplemented with 3% histidine, were tested in 60‐day‐old meagre (initial weight—6.2 g) for 82 days. Survival varie...
Article
Developing tailor-made fortified farmed fish is a promising solution to overcome nutritional deficiencies and increase consumer confidence in these products. This study evaluated the supplementation of three fortified diets with I-rich seaweed and selenised-yeast on essential and toxic elements levels in gilthead seabream (Sparus aurata) and common...
Article
Full-text available
Background Many fish taxa produce sound in voluntary and in disturbance contexts but information on the full acoustic repertoire is lacking for most species. Yet, this knowledge is critical to enable monitoring fish populations in nature through acoustic monitoring. Methods In this study we characterized the sounds emitted during disturbance and v...
Poster
Fish diseases are one of the main bottlenecks in aquaculture, especially in intensive fish farming systems, representing severe annual costs to producers. One of the best ways to control this problem is using a preventive approach, with scheduled samplings to the areas of fish production. This allows an early detection of pathogenic agents, leading...
Article
Full-text available
The aquaculture growth can be followed by the occurrence of more and new pathogenic agents, since the production leads to higher fish densities in confined areas more appropriate to the appearance and propagation of pathologies. Copper sulfate has been widely used in preventing and controlling fish parasites. The objective of this study is to inves...
Article
The consolidation of meagre (Argyrosomus regius) in aquaculture requires an understanding and optimization of larval rearing and nutritional conditions. The aim of this study was to analyse the effects of an early introduction of inert diets during larval rearing, on growth performance, digestive enzymes activity and development of skeletal anomali...
Article
Full-text available
Amyloodiniosis is a disease that represents a major bottleneck for semi-intensive aquaculture, especially in Southern Europe. The inefficacy of many of the treatments for this disease on marine fish produced in semi-intensive aquaculture has led to a new welfare approach to amyloodiniosis. There is already some knowledge of several welfare issues t...
Conference Paper
Fish diseases are one of the main problems in aquaculture, especially in intensive fish farming where they represent severe annual costs to producers. One way to control this problem is with a proactive approach to disease outbreaks. With a preventive approach, we use schedule samplings to all the areas of fish production in the facilities. This al...
Article
The current study aims to shed light on the neurotoxicity of MeHg in fish (white seabream − Diplodus sargus) by the combined assessment of: (i) MeHg toxicokinetics in the brain, (ii) brain morphometry (volume and number of neurons plus glial cells in specific brain regions) and (iii) fish swimming behavior (endpoints associated with the motor perfo...
Article
Full-text available
The effect of two anesthetics, 2-phenoxyethanol (2-PE) and clove oil (COil) were studied in meagre, Argyrosomus regius. This study aimed to determine the adequate dose of anesthesia for different aquaculture procedures, to assess a sedative or stressor effect of low anesthetic concentrations, and to assess the effect of low anesthetic doses at high...
Conference Paper
Full-text available
The enormous biological diversity observed among marine fish species might induce different physiological responses when species are submitted to the same conditions. The aim of this presentation was to describe the physiological responses observed both for meagre and gilthead seabream maintained in different rearing conditions, to deepen our knowl...
Article
Full-text available
The purpose of this study was to describe and compare the reproductive success and egg and larvae quality between wild and first-generation (F1) breeders of Argyrosomus regius. Wild broodstock were adapted to captivity, and good-quality spawns were obtained in 2009-2010, after GnRH treatment. In 2012, the F1 meagre (3 years old) spawned naturally a...
Article
Full-text available
There are several aspects of inorganic mercury (iHg) toxicokinetics in fish that remain undeveloped despite its environmental ubiquity, bioaccumulation capacity and toxicity. Thus, this study presents the uptake, distribution and accumulation of iHg following water contamination by adopting a novel set of body compartments (gills, eye wall, lens, b...
Article
Full-text available
Juvenile meagre Argyrosomus regius (Asso, 1809) maintained in experimental conditions developed lateral and/or bilateral circular-shaped sarcoma within the opercular cavity. The sarcoma was dense, reddish and its growth from the branchial arch exerted pressure on the operculum forcing it to open. Histologically, the neoplasm exhibited marked prolif...
Article
Fish are routinely exposed to harmful algal blooms that produce noxious compounds and impact the marine food web. This study investigates the role of phase I and II detoxification enzymes on metabolism of the novel paralytic shellfish toxins (PSTs), the hydroxybenzoate analogues recently discovered in Gymnodinium catenatum strains, in the liver of...
Article
Meagre juveniles (Argyrosomus regius) maintained in experimental conditions for 3 weeks developed a lateral and/or bilateral circular shape sarcoma at the opercular cavity. The sarcoma was dense, reddish and its growth from the branchial arch towards outside forced the opening of the operculum. Histologically the neoplasm exhibited intense prolifer...
Article
Fish are recurrently exposed to paralytic shellfish toxins (PSTs) produced by Gymnodinium catenatum. Nevertheless, the knowledge regarding metabolism of PSTs and their toxic effects in fish is scarce. Consequently, the current study aims to investigate the role of phase I and II detoxification enzymes on PST metabolism in the liver of white seabrea...
Article
Full-text available
Marine toxins generated by harmful algal blooms can be transferred through the marine food web and ultimately cause massive deaths of piscivorous predators. However, very few studies have explored the processes of accumulation and biotransformation of paralytic shellfish toxins (PSTs) within fishes. White seabream (Diplodus sargus) were orally chal...
Article
Full-text available
The present study was undertaken in order to analyse whether macrobenthic communities can or not be used in monitoring programmes of the environmental quality of fish ponds. Functional community analysis and biotic metrics were analysed aiming at the assessment of their effectiveness in discriminating potential impacts of fish production in these s...
Data
Full-text available
The present work analysed the potential impacts of the enrichment of semi-intensive production earthen ponds with the ragworm Hediste diversicolor in the benthic dynamics and natural productivity. The macrobenthos and sediment characteristics were analysed in two enriched ponds and two control ponds in May, June and September 2005. The number of sp...
Article
The present work analysed the potential impacts of the enrichment of semi-intensive production earthen ponds with the ragworm Hediste diversicolor in the benthic dynamics and natural productivity. The macrobenthos and sediment characteristics were analysed in two enriched ponds and two control ponds in May, June and September 2005. The number of sp...
Article
The relationship between organic enrichment and macrobenthic colonization patterns was investigated during an 8-month period in Diplodus sargus (white seabream) production ponds. A stratified sampling design was applied and each pond was divided into three zones: water entrance (WE); central (C); and automatic feeder zones (AF). Generally, the numb...
Poster
Full-text available
Resumo - Ainda que desejável, a produção de linguado (Solea senegalensis e S. vulgaris) tem sofrido de alguns contratempos, nomeadamente a inexistência de ração específica para esta espécie. Os linguados são produzidos desde há bastante tempo na Ria Formosa em regime extensivo, a produtividade bentónica natural de tanques de terra poderá ser prep...

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