Synecology in soft sediment bivalves: the influence of parasites, physiological processes, and environmental stressors on health and disease

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dc.contributor.advisor Culloty, Sarah C. en
dc.contributor.advisor O'Riordan, Ruth M. en Morgan, Emer 2013-05-20T16:17:42Z 2013-05-20T16:17:42Z 2013 2013
dc.identifier.citation Morgan, E. 2013. Synecology in soft sediment bivalves: the influence of parasites, physiological processes, and environmental stressors on health and disease . PhD Thesis, University College Cork. en
dc.identifier.endpage 274
dc.description.abstract Ecosystem goods and services provided by estuarine and near coastal regions are being increasingly recognised for their immense value, as is the biodiversity in these areas and these near coastal communities have been identified as sentinels of climate change also. Population structure and reproductive biology of two bivalve molluscs, Cerastoderma edule and, Mytilus edulis were assessed at two study sites over a 16-month study period. Following an anomalously harsh winter, advancement of spawning time was observed in both species. Throughout Ireland and Europe the cockle has experienced mass surfacings in geographically distinct regions, and a concurrent study of cockles was undertaken to explore this phenomenon. Surfaced and buried cockles were collected on a monthly basis and their health compared. Age was highlighted as a source of variation between dying and healthy animals with a parasite threshold being reached possibly around age three. Local factors dominated when looking at the cause of surfacing at each site. The health of mussels was explored too on a temporal and seasonal basis in an attempt to assess what constitutes a healthy organism. In essence external drivers can tip the balance between “acceptable” levels of infection where the mussel can still function physiologically and “unacceptable” where prevalence and intensity of infection can result in physiological impairment at the individual and population level. Synecological studies of intertidal ecosystems are lacking, so all bivalves encountered during the sampling were assessed in terms of population structure, reproduction, and health. It became clear, that some parasites might specialize on one host species while others are not so specific in host choice. Furthermore the population genetics of the cockle, its parasite Meiogymnophallus minutus, and its hyperparasite Unikaryon legeri were examined too. A small nucleotide polymorphism was detected upon comparison of Ireland and Morocco. en
dc.description.sponsorship European Commission ( Project: SUSFISH part funded by the European Regional Development Fund (ERDF) through the Ireland Wales Programme (INTERREG 4A). en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher University College Cork en
dc.rights © 2013, Emer Morgan. en
dc.rights.uri en
dc.subject Synecology en
dc.subject Cerastoderma edule en
dc.subject Bivalves en
dc.subject Trematodes en
dc.subject Neoplasia en
dc.subject.lcsh Bivalves--Ecology en
dc.subject.lcsh Trematoda en
dc.subject.lcsh Coastal ecology en
dc.subject.lcsh Cerastoderma edule--Ecology en
dc.title Synecology in soft sediment bivalves: the influence of parasites, physiological processes, and environmental stressors on health and disease en
dc.type Doctoral thesis en
dc.type.qualificationlevel Doctoral en
dc.type.qualificationname PhD (Science) en
dc.internal.availability Full text available en No embargo required en
dc.description.version Accepted Version
dc.contributor.funder European Commission en
dc.description.status Not peer reviewed en Biological, Earth & Environmental Sciences en
dc.check.type No Embargo Required
dc.check.reason No embargo required en
dc.check.opt-out Not applicable en
dc.thesis.opt-out false *
dc.check.embargoformat Not applicable en
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