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Contains fulltext : 14084.pdf (Publisher’s version ) (Closed access)

Contains fulltext : 14092.pdf (Publisher’s version ) (Closed access)

As set out in the Terms of Reference of this study the aim at the outset was to put together a clear picture of how the development of the aquaculture industry in Ireland has socially and economically shaped the coastal communities in Counties Donegal, Galway, Kerry and Cork and where this development is likely to lead these communities in the future. Specifically the aquaculture industry was examined in the context of other influencing factors of economic and social wealth in each of the study regions to establish its role within the community. The hinterland of Kilkieran Bay, in southwest Co. Galway, was chosen as a suitable area in which to conduct a detailed case study of the impact of the industry in peripheral coastal areas. The 3 principal phases of the project comprised; 1. A comprehensive literature review and data collation exercise 2. An extensive consultation process involving representatives of the aquaculture industry, relevant government and semi-state departments, community development bodies, tourism operators, and aquaculture operators in each of the regions. 3. A detailed series of questionnaire surveys in the case study area., Funder: Marine Institute

Sea lice are copepod ectoparasites of fish, belonging to the family Caligidae. Their importance to marine salmonid culture stems from the extensive damage they may inflict on hosts through feeding and contact abrasion. The principal species associated with cultured salmonids is Lepeophtheirus salmonis (Kroyer, 1838), a large salmonid-specific species reported as a problem for aquaculture in a number of countries. The objectives of the present study were: (a) to examine the production and distribution of larval stages of Lepeophtheirus salmonis within a cage containing Salmo salar in order to identify specific spawning cues and larval frequencies and intensities; (b) to identify precisely the behavioural patterns of sea lice larvae over a variety of tidal and diurnal cycles; (c) to monitor environmental parameters and (d) having identified the specifics of spawning and larval behaviour, to identify potential management strategies for the elimination of a high percentage of sea lice larvae produced on fish farms. Larval plankton samples along with mobile lice samples were taken during two growing cycles on a fish farm on the west coast of Ireland. Highest densities of larvae were recovered during neap tides following synchronous spawning episodes within the female population. Gravid females were recorded during the winter months; however, spawning intensity remained low until late Spring. Sea lice larvae migrated vertically within the water column with highest densities recorded during slack water normally associated with high tide. The results of this study increases our knowledge of the complex behaviour and life cycle of the louse. The occurrence and the location of high densities of larvae within salmon cages have been identified. This information provides a sound basis from which management strategies can be developed in order to reduce lice intensities on the farm., Funder: Marine Institute