Institution
University of the Algarve
Education•Faro, Portugal•
About: University of the Algarve is a education organization based out in Faro, Portugal. It is known for research contribution in the topics: Population & Tourism. The organization has 3649 authors who have published 10303 publications receiving 233536 citations.
Topics: Population, Tourism, Context (language use), Gene, Fishing
Papers published on a yearly basis
Papers
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TL;DR: Investigating the Cd effects in the gill and digestive gland of the sentinel species R. decussatus found that Cd induces major changes in proteins involved in cytoskeletal structure maintenance, cell maintenance and metabolism and metabolism suggesting potential energetic change.
97 citations
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TL;DR: DNA fragmentation was revealed and the presence of oxidized bases that could be produced by oxidative events during short-term storage and cryopreservation in sex-reversed rainbow trout (Oncorhynchus mykiss) spermatozoa was explored, showing that oxidative processes affect guanosines rather than cytosines.
97 citations
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TL;DR: While most freshwater fish appear to rely on internal stores of calcium, i.e. bone and/or scales to increase calcium availability, the marine sea bream accommodates calcium-transporting mechanisms to obtain calcium from the environment and preserve internal stores, suggesting that a fundamental difference may exist in the E2-dependent calcium regulation between freshwater and marine teleosts.
Abstract: In all teleost fishes vitellogenesis is triggered and maintained by oestradiol-17 (E 2 ) and is accompanied by an increase of blood plasma calcium and phosphate. The action of this hormone on calcium metabolism was investigated by treating fast-growing immature juvenile sea bream (Sparus aurata) with coconut butter implants alone (control) or implants containing 10 µg/g E 2 . Treatment with E 2 induced the production of circulating vitellogenin, a 2·5-fold increase in plasma ionic Ca 2+ and a 10-fold increase in plasma total calcium, largely bound to protein. In contrast to freshwater species, which obtain most of their calcium from the environment directly through the gills, the intestinal component of calcium uptake of the salt water-living sea bream represented up to 60‐70% of the total uptake. The whole body calcium uptake, expressed as the sum of calcium obtained via intestinal and extra-intestinal (likely branchial) routes increased significantly in response to E 2 . Combined influx and unchanged efflux rates resulted in a significant 31% increase in net calcium uptake. There was no evidence for an effect of E 2 on the calcium and phosphate content of the scales or the tartrate-resistant acid phosphatase activity (an index for bone/scale osteoclast activity). While most freshwater fish appear to rely on internal stores of calcium, i.e. bone and/or scales to increase calcium availability, the marine sea bream accommodates calcium-transporting mechanisms to obtain calcium from the environment and preserve internal stores. These observations suggest that a fundamental difference may exist in the E2-dependent calcium regulation between freshwater and marine teleosts.
97 citations
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TL;DR: In this paper, the authors employed transcriptomic and proteomic analyses to study effects of dietary vegetable oil (VO) in two family groups of Atlantic salmon selected for flesh lipid content, 'Lean' or 'Fat'.
Abstract: Expansion of aquaculture requires alternative feeds and breeding strategies to reduce dependency on fish oil (FO) and better utilization of dietary vegetable oil (VO). Despite the central role of intestine in maintaining body homeostasis and health, its molecular response to replacement of dietary FO by VO has been little investigated. This study employed transcriptomic and proteomic analyses to study effects of dietary VO in two family groups of Atlantic salmon selected for flesh lipid content, 'Lean' or 'Fat'. Metabolism, particularly of lipid and energy, was the functional category most affected by diet. Important effects were also measured in ribosomal proteins and signalling. The long-chain polyunsaturated fatty acid (LC-PUFA) biosynthesis pathway, assessed by fatty acid composition and gene expression, was influenced by genotype. Intestinal tissue contents of docosahexaenoic acid were equivalent in Lean salmon fed either a FO or VO diet and expression of LC-PUFA biosynthesis genes was up-regulated in VO-fed fish in Fat salmon. Dietary VO increased lipogenesis in Lean fish, assessed by expression of FAS, while no effect was observed on β-oxidation although transcripts of the mitochondrial respiratory chain were down-regulated, suggesting less active energetic metabolism in fish fed VO. In contrast, dietary VO up-regulated genes and proteins involved in detoxification, antioxidant defence and apoptosis, which could be associated with higher levels of polycyclic aromatic hydrocarbons in this diet. Regarding genotype, the following pathways were identified as being differentially affected: proteasomal proteolysis, response to oxidative and cellular stress (xenobiotic and oxidant metabolism and heat shock proteins), apoptosis and structural proteins particularly associated with tissue contractile properties. Genotype effects were accentuated by dietary VO. Intestinal metabolism was affected by diet and genotype. Lean fish may have higher responsiveness to low dietary n-3 LC-PUFA, up-regulating the biosynthetic pathway when fed dietary VO. As global aquaculture searches for alternative oils for feeds, this study alerts to the potential of VO introducing contaminants and demonstrates the detoxifying role of intestine. Finally, data indicate genotype-specific responses in the intestinal transcriptome and proteome to dietary VO, including possibly structural properties of the intestinal layer and defence against cellular stress, with Lean fish being more susceptible to diet-induced oxidative stress.
96 citations
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TL;DR: Silver nanoparticles (Ag NPs) have emerged as one of the most commonly used NPs in a wide range of industrial and commercial applications, but it's not clear if for Ag NPs the observed effects are attributed to free Ag+ ions associated with the nanoparticle effect.
96 citations
Authors
Showing all 3723 results
Name | H-index | Papers | Citations |
---|---|---|---|
Shuzhi Sam Ge | 97 | 883 | 40865 |
Martin Ingvar | 79 | 315 | 21363 |
Fernando Albericio | 76 | 965 | 26146 |
Paul Goldberg | 68 | 385 | 17238 |
Anders Björkman | 64 | 282 | 13174 |
José J. G. Moura | 63 | 465 | 15490 |
Karl Magnus Petersson | 63 | 185 | 14441 |
Paulo P. Freitas | 59 | 667 | 13777 |
Maria João Bebianno | 58 | 215 | 10445 |
Ester A. Serrão | 55 | 292 | 9751 |
Rui Filipe Oliveira | 54 | 239 | 10225 |
Deborah M. Power | 53 | 300 | 10130 |
Rui Santos | 52 | 357 | 9020 |
Adelino V.M. Canario | 52 | 289 | 9912 |
Martyn Pillinger | 51 | 257 | 8556 |