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Title: Genetics and management of mussel Mytilus species in Scotland
Author: Dias, Patricia Joana
ISNI:       0000 0004 2710 7609
Awarding Body: University of Aberdeen
Current Institution: University of Aberdeen
Date of Award: 2010
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The sympatric occurrence of M. edulis, Mytilus trossulus, Mytilus galloprovincialis and their hybrids in cultivation has recently been reported and significant production losses attributed to the presence of M. trossulus. A molecular real-time PCR assay capable of identifying M. edulis, M. trossulus and M. galloprovincialis species-specific alleles was developed and applied to a large-scale survey of these species. We found M. trossulus distribution to be restricted to the south Highland and Argyll areas. Spawning asynchrony of M. trossulus and M. edulis was explored, aimed at favouring M. edulis production at mixed-species sites. However, the close similarity between these species and the impossibility of controlling important environmental and biological factors suggest strategies based on such differences would be too unpredictable for effective use by the industry. M. trossulus and its hybrids have also been noticed to be significantly more frequent on ropes in the upper 3-4 m of the water column, suggesting that changes in cultivation practices to avoid settlement in these depths are likely to reduce M. trossulus proliferation. At severely affected farms, the fallowing of sites and transfer of M. edulis unispecific seed is seen as the best long-term strategy towards the re-establishment of M. edulis stock. At all impacted farms area-specific solutions to managing the problem are being considered. Any management solutions will also be accompanied by an industry wide strategy and awareness, which will include the development of an industry supported code of good practice.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available