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CIÊNCIA E INOVAÇÃO EM MOLUSCICULTURA SCIENCE AND INNOVATION IN MOLLUSC AQUACULTURE

Explore the social-economic importance and constraints in mollusc aquaculture, including production, improvement of hatchery-produced seed, broodstock conditioning, reproductive cycle, genetic variation, and natural hybridization. Learn about ongoing projects in this field.

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CIÊNCIA E INOVAÇÃO EM MOLUSCICULTURA SCIENCE AND INNOVATION IN MOLLUSC AQUACULTURE

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  1. CIÊNCIA E INOVAÇÃO EM MOLUSCICULTURASCIENCE AND INNOVATION IN MOLLUSC AQUACULTURE Alexandra Leitão Estação Experimental de Moluscicultura de Tavira-EEMT

  2. MOLLUSC AQUACULTURE IN PORTUGAL: • Social-economic importance: • over 10.000 persons directly or indirectly involved • However, several constraints remain in the development of this activity Production in weight (DGPA 2008) Production in values

  3. Improvement of hatchery-produced seed Clam Oyster

  4. SCIENCE AND INNOVATION IN MOLLUSC AQUACULTURE Ruditapes decussatus Improvement of broodstock conditioning and gamete quality • Northern population more appropriate source of genitors for hatchery aquaculture; • Larval viability seems independent of broodstock performance; • The Winter conditioning was more effective than autumn conditioning; • Clams conditioned at 20-22ºC exhibited better performance in terms of response to spawning induction.

  5. SCIENCE AND INNOVATION IN MOLLUSC AQUACULTURE Ruditapes decussatus Dynamics of the reproductive cycle of different geographic populations Metamorphosis synchronisation and improvement of settlement Application/Optimization of a low cost larvae and seed production system

  6. Fast Growers Slow Growers SCIENCE AND INNOVATION IN MOLLUSC AQUACULTURE Study of the cytogenetic phenomenon of aneuploidy and its negative relationship with growth rate for future genitors selection

  7. SCIENCE AND INNOVATION IN MOLLUSC AQUACULTURE Ruditapes decussatus Genetic variation in North Atlantic and Mediterranean Sea populations Genetic basis for reproductive performance of different populations Identification of genes involved in oocyte maturation and in investment of clam reproduction Identification of markers (mRNA or proteins) of clam oocytes quality

  8. Several tonnes of adults and thousand of juveniles of C. gigas were introduced Source: Grizel & Héral (1991) J. Cons. Int. Explor. Mer SCIENCE AND INNOVATION IN MOLLUSC AQUACULTURE Crassostrea gigas (Japanese oyster) Crassostrea angulata (Portuguese oyster) The production of this species had a high socio-economical importance in Portugal until the late 60’s In the 60’s and 70’s mass mortalities of the Portuguese oyster occurred all over Europe • Some C. angulata populations manage to survive !

  9. SCIENCE AND INNOVATION IN MOLLUSC AQUACULTURE Study the natural hybridization between the Portuguese oyster C. angulata and the Japanese oyster C. gigas Mitochondrial DNA Mitochondrial DNA

  10. SCIENCE AND INNOVATION IN MOLLUSC AQUACULTURE Dynamics of the reproductive cycle of the Portuguese oysterC. angulata Genetic characterization of C. angulata populations Optimization of the larval and seed culture of C. angulata Comparative aquaculture performance of the Portuguese C. angulata and the Japanese oyster C. gigas

  11. Projects: • REPROSEED, improvement of hatchery-produced seed (funding: FP7), 2010-2014; • SEAFARE, sustainable and environmentally friendly aquaculture for the Atlantic region of Europe (funding: INTERREG), 2010-2013; • ECOAQUA, sustainable aquaculture (funding: INTERREG), 2009-2010; • PACEB, karyological evolution of bivalves (funding: FCT), 2008-2011; • GENECLAM, population genetics of carpet shell clam (funding: FCT), 2010-2013; • MARINAQUA, aquaculture, genetics and pathology of bivalves (funding: PROMAR), 2010-2012;

  12. Obrigada Thank you

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