Weight-length relationships for fish species discarded in the commercial fishery of the Algarve (southern Portugal). Effects of organic xenobiotics on proliferation and gene response of the clam parasite Perkinsus atlanticus. Population genetics of the subtidal seagrass Zostera marina in Ria Formosa, Portugal 7th Evolutionary Biology Meeting, June 25-27, 2003, Marseille, France.
Population structure of dwarf eelgrass Zostera noltii along the Iberian Peninsula: data from microsatellite analyses. The role of the Guadiana estuary in the early development of Sardina pilchardus (Walbam, 1792): A hypothesis. Long-term changes in the fish community of the Ria Formosa Lagoon (Algarve, S-Portugal): a comparison based on two surveys made 20 years apart.
Hormonal control of the reproductive cycle of the Lusitanian toad, Halobatrachus didactylus Universidade do Algarve. Regulation of gene expression related to carotenoid biosynthesis in the microalga Dunaliella salina. Isolation and characterization of a lycopene cyclase gene involved in the carotenoid biosynthetic pathway in the microalga Dunaliella salina. supervisors João Varela and Bertram Brenig).
Effects of the seasonal dynamics of green algae on the nutrient flux in the sediments of the Ria Formosa lagoon.
Description of the research activities
Studies on the biology of the parasite Perkinsus atlanticus and development of new drug therapies. It may also play a role in the proteolysis of misfolded proteins in the chloroplast. The relative importance of the two forms in the different biological activities identified for TH has yet to be determined.
Analysis of the effect of rearing density on sex differentiation indicates a possible effect only in the first 60 days of life. In addition, studies will be initiated to confirm the role of these genes in sex differentiation and reproductive physiology. This study will be supported by hormonal measurements in the developing larvae and immunohistochemistry of the developing organs with specific antibodies.
Analysis of the evolution of genetic diversity during recolonization of disturbed meadows of Cymodocea nodosa. Phylogeny of the genus Posidonia: How Posidonia oceanica came to be endemic to the Mediterranean. The same intertidal areas of the twenty-three sites considered in this study will be visited in summer and winter.
This project will provide an updated database of the benthic marine communities of the Portuguese coast. The need to integrate available data led to the development of integrated networks at sea. A sample of previously surveyed ponds will be observed to understand year-to-year variations.
The European cuttlefish (S. officinalis) has been cultivated throughout its life cycle at the University of the Algarve for the last 4 years. In the case of three new species of Myxosporea found in collaboration with Prof. This study originally aimed to follow the maturation pattern of sardine in the Algarve.
Externally funded Projects
Summary and objectives: Salaria pavo is a demersal living fish in the coastal zone of the Mediterranean and adjacent Atlantic coast. Summary and objectives: The overall objective of this project is to design and develop technologies for the commercial breeding of sole species Solea solea and Solea senegalensis. Summary and Objectives: Microalgae are microscopic photosynthetic organisms that form the bottom of the food chain.
The ontogeny of the organogenesis of the immune system, non-specific cellular immunity and humoral immunity will be characterized in sole. The effects of selected immunostimulants and probiotics on immune system development, immune response, and fish growth and survival will be evaluated. Title: "Basic mechanisms of the effect of microalgae on the early life stages of fish - MICROALGAE".
Title: "Characterization of the endemic infection of the mussel Ruditapes decussatus with the parasite Perkinsus atlanticus (protista, apicomplexa) on the Portuguese coast". Title: "Determining the ideal dietary amino acid profile for larvae and post-larval marine fish - IDEAAL". This comparison of fish AA profiles and diets will provide a rough indication of AA nutritional imbalances at different stages.
Summary and objectives: 1.- To explain the underlying ecological causes of the introduction, establishment and development of seaweed invasions on European coasts. Assess the impact of commercial harvesting on the genetic structure of populations and its demographic impact; Title: “Evaluation of the impact of beach nourishment dredging on marine communities off the Central Algarve”.
Summary and Objectives: Evaluation of the ecological succession of vegetation of barrier islands in the Natural Park of Ria Formosa. Objectives/Summary: Evaluation of the genetic structure and reproductive capacity of the seagrasses in the Natural Park of Ria Formosa. Summary and objectives: The aim of the present study is to establish the phylogenetic relationships between species of Atlantic and Mediterranean flatfish.
Summary and objectives: Characterization of fish community structure (species composition, occurrence and length distributions, biomass, diversity, evenness, nursery function) and their relationship with environmental factors. Determination of the optimal values and tolerance limits for some environmental factors for the most important fish species.
International and Interinstitutional Cooperations
Title: "Effects of river flow changes on the fish communities of the Douro, Tejo and Guadiana estuaries and adjacent coastal areas. Determination of the carrying capacity of the environment for the main fish species, based on knowledge of the main limiting resources and the correlation with some environmental factors. Summary and objectives: Fish are relying on information received by all their senses to detect, recognize and select food.
The arousal phase is mainly mediated by olfaction, while in the search phase the relative importance of different sensory modalities varies depending on the feeding strategy and ecological niche of the species. This could be the basis for the future technological development of new inert food diets that improve the cultivation of this commercially important species. Title: "Ontogeny of the endocrine system in Solea senegalensis and its application in improved larval growth".
Summary and Objectives: Research new species for aquaculture, such as solea (Solea senegalensis) contributes significantly to the development of marine fish culture in Spain and Portugal. However, a major obstacle to the expansion of the industry is the growth of larval fish. The industry relies on the production of large numbers of high-quality fry, which in turn relies on the first feeding, development and successful growth of fish larvae.
The embryonic development of marine fish is rapid and the larvae hatch at a relatively early stage of development, resulting in increased vulnerability to external factors. Since hormones play an important role in regulating nutrition, growth and metamorphosis, it is important to investigate the structural and functional development of the endocrine system during early ontogeny of marine fish. This project aims to 1) investigate the development of the endocrine system in Solea senegalensis 2) determine how fish larvae respond to stressful situations and 3) study the possible beneficial effects of exogenously added hormones on growth, metamorphosis and pigmentation.
Summary and objectives: The main objective of the project is to optimize the cultivation of sole larvae (Solea senegalensis), a species with high potential for marine fish farming. Pigmentation abnormalities in single larvae and post-larvae will be studied using histochemical and immunohistochemical techniques. It will be investigated whether zootechnical parameters (density, temperature, salinity, photoperiod, light intensity, type of substrate) or nutritional factors are related to pigmentation abnormalities.
CCMAR Seminar programme
Seminars given by CCMAR members in other institutions
Dissemination of scientific culture
Os investigadores voltam à escola", proferido em uma dezena de escolas do Algarve, onde intervieram Teresa Borges, Margarida Castro, Margarida Cristo, Karim Erzini, Jorge Gonçalves e Luís Chícharo. Os investigadores voltam às aulas", entregue em uma dezena de escolas do Algarve por Rui Rocha e outros membros do grupo de aquacultura.
Visiting scientists
Organization of Conferences, Workshops, Courses
