Marine Institute Open Access Repository

Recent Submissions

  • ItemOpen Access
    An Assessment of the Level of Genetic Introgression in Irish Wild Salmon Populations from Farmed Escaped Salmon (GeneFlow)
    (Marine Institute, 2026-07-14) University College Cork; Inland Fisheries Ireland; Teagasc
    This report presents the first nationwide assessment of genetic introgression from farmed salmon into wild Irish Atlantic salmon populations. Based on samples of over 8,000 contemporary fish (2023–2025) and historical samples (2003–2008), a SNP-based genetic approach was used to quantify farm ancestry in individual river populations. Results show evidence of introgression in approximately one third of populations sampled, with levels of geneflow considered as being generally low to moderate. Affected populations were found nationwide, including in areas distant from major aquaculture activity, although higher levels were more common near marine net-pen farms and in rivers where freshwater smolt rearing facilities are located. The findings provide a baseline for monitoring and highlight the importance of ongoing surveillance and management of salmon aquaculture installations to protect genetic integrity of wild stocks.
  • ItemOpen Access
    Ecological consequences of internal seiches in a semi-enclosed, anoxic coastal basin
    (Inter-Research, 2018-09-17) Kelly, Sean; de Eyto, Elvira; Poole, Russell; White, Martin
    Climate-related increase of near-surface water temperatures in aquatic environments both decreases oxygen solubility and intensifies vertical stratification of the water column, prompting concern over the depletion of dissolved oxygen (DO) in deep interior waters. Understanding bio-physical interactions in affected ecosystems is therefore paramount, as physical processes often determine the spatial extent of deoxygenated zones. One pertinent example, often linked to mass-mortality events of marine organisms, is wind-driven upwelling of low-DO deep waters into shallower, nearshore oxygenated areas. In this note, mortalities recorded during routine fishery surveys in Lough Furnace, a semi-enclosed estuarine basin with deep anoxia, are shown to result from significant wind events. Advection of deoxygenated deep water into nearshore areas occupied by fishing nets occurred following strong winds. Relaxation of the initial wind stress generated a baroclinic standing wave (internal seiche) and a succession of upwelling and downwelling events which caused drastic fluctuations in nearshore DO concentrations that persisted for several hours. The internal seiche dynamics were confirmed following analysis of water density oscillations at a mid-basin and boundary location. These results highlight the importance of bio-physical interactions in aquatic ecosystems with DO-depleted deep waters, as hydrodynamic processes can mediate the exposure of biota to deoxygenated water conditions.
  • ItemOpen Access
    The Irish Maritime Transport Economist Volume 9
    (Marine Institute, 2012) Irish Maritime Development Office
  • ItemOpen Access
    The Irish Maritime Transport Economist Volume 12
    (Marine Institute, 2015) Irish Maritime Development Office
  • ItemOpen Access
    The Irish Maritime Transport Economist Volume 13
    (Marine Institute, 2016) Irish Maritime Development Office

Communities in Marine OAR

Select a community to browse its collections.