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Title: Distribution and dispersal of the non-native caprellid amphipod, Caprella mutica Schurin 1935
Author: Ashton, Gail Victoria
ISNI:       0000 0001 3430 5441
Awarding Body: University of Aberdeen
Current Institution: University of the Highlands and Islands
Date of Award: 2007
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The introduction of non-native species is the second most important anthropogenic threat to global biodiversity, with the first being habitat destruction. Caprella mutica is a native of the Sea of Japan area, but has subsequently been identified as introduced in several globally distributed locations. This thesis first establishes the current global distribution of C. mutica and uses molecular evidence to suggest global introduction pathways. A study of post-establishment (secondary) vectors and the environmental tolerance of C. mutica provide information regarding the modes of dispersal and potential future range of this and other non-native species. Information regarding the biology and ecology of C. mutica was collected through a study of its seasonal population dynamics. C. mutica has several traits attributed as being characteristics of successful non-native species, such as an abundant and widespread distribution in the native range, broad physiological tolerances, broad food preferences, short lifespan and generation times and high fecundity and growth rate. Enhanced food supply, availability of space, and intensity, timing and sequence of disturbance events contributed to the relative success of C. mutica at several sites. Species native to cold temperate regions, with similar life-history characteristics to C. mutica and exposed to human dispersal mechanisms have the potential to be introduced to the UK.  Once established, there are several effective dispersal mechanisms that can rapidly spread species along the coastlines. Given the widespread distribution of C. mutica in the UK, eradication is not an option.
Supervisor: Cottier-Cook, Elizabeth ; Burrows, Michael Sponsor: UHI Studentship
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available