Browsing Atlantic Technological University (Galway-Mayo) by Author "O'Connor, Ian"
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Accounting for the effects of lipids in stable isotope (δ13C and δ15N values) analysis of skin and blubber of balaenopterid whales.
Ryan, Conor; McHugh, Brendan; Trueman, Clive N.; Harrod, Chris; Berrow, Simon; O'Connor, Ian (John Wiley & Sons, 2012)RATIONALE: Stable isotope values (d13C and d15N) of darted skin and blubber biopsies can shed light on habitat use and diet of cetaceans, which are otherwise difficult to study. Non-dietary factors affect isotopic variability, ... -
Assessing the Potential of Drones to Take Water Samples and Physicochemical Data from Open Lakes
Lally, Heather; O'Connor, Ian; Broderick, Liam; Broderick, Mark; Jensen, Olaf; Graham, Conor (Environmental Protection Agency, 2020-09)Water sampling remains a pivotal method for monitoring and understanding the condition of aquatic environments properly and effectively. Large-scale ecological water sampling and monitoring programmes require considerable ... -
Assessment and monitoring of ocean noise in Irish waters
Beck, Suzanne; O'Connor, Ian; Berrow, Simon; O'Brien, Joanne (Environmental Protection Agency, 2013)This desk study was aimed to help Ireland meet the requirements of the Marine Strategy Framework Directive (MSFD) (2008/56/EC) under Descriptor 11: The introduction of energy, including underwater noise, is at levels that ... -
Breeding habitat of poorly studied humpback whales (Megaptera novaeangliae) in Boa Vista, Cape Verde
Ryan, Conor; Craid, Darren; Lopez-Suárez, Pedro; Vazquez Perez, Jose; O'Connor, Ian; Berrow, Simon (2013)The waters surrounding Cape Verde comprise one of two known breeding grounds for humpback whales in the North Atlantic. The population remains very small and has apparently failed to recover since the cessation of whaling ... -
Density estimates of harbour porpoises phocoena phocoena at eight coastal sites in Ireland
Berrow, Simon; Hickey, Ronan; O'Connor, Ian; McGrath, David (2014)Single platform line-transect surveys with distance sampling were carried out at eight sites between July and September 2008 to derive density and abundance estimates of harbour porpoises. Over 37 days at sea, a total of ... -
Discrete or not so discrete: Long distance movements by coastal bottlenose dolphins in UK and Irish waters
Robinson, Kevin P.; O'Brien, Joanne; Berrow, Simon; Cheney, Barbara; Costa, Marina; Elsfield, Sonja M.; Haberlin, Damien; Mandleberg, Laura; O'donovan, Mairead; Oudejans, Machiel G.; O'Connor, Ian; Stevick, Peter T.; Thompson, Paul M.; Whooley, Padraig (2012)The potential for long distance movements in common bottlenose dolphins (Tursiops truncatus) from six UK and Irish study sites was examined using photographs of natural markings. Here we provide the first evidence for ... -
High concentrations of persistent organic pollutants in adult killer whales (Orcinus orca) and a foetus stranded in Ireland
Schlingermann, Moira; Berrow, Simon; Craig, Darren; McHugh, Brendan; Marrinan, Michael; O'Brien, Joanne; O'Connor, Ian; Ryan, Conor; Mudzatsi, Engelbert; White, Philip (Elsevier Ltd., 2019-10-29)Bio-accumulation of persistent organic pollutants including polychlorinatedbiphenyls (PCBs), brominated flame retardants and organochlorine pesticides continue to be of major concern for marine apex predators such as killer ... -
Investigation into the potential use of dietary supplementation to reduce the impact of Amoebic Gill Disease
Talbot, Anita; McCormack, Michelle; Dwivedi, Ankit; O'Connor, Ian; Valdenegro, Victoria; MacCarthy, Eugene (Elsevier Ltd, 2022-02-03)Amoebic Gill Disease (AGD) is a disease affecting cultured Atlantic salmon (Salmo salar) which is caused by Paramoeba perurans. The immunomodulatory impact of functional foods has previously been demonstrated in salmon. ... -
Investigation of the Initial Host Response of Naïve Atlantic Salmon (Salmo salar) Inoculated with Paramoeba perurans
McCormack, Michelle; Dillon, Eugene; O'Connor, Ian; MacCarthy, Eugene (MDPI, 2021-04-02)Amoebic Gill Disease (AGD), caused by the ectoparasite Paramoeba perurans is characterised by hyperplasia of the gill epithelium and lamellar fusion. In this study, the initial host response of naïve Atlantic salmon (Salmo ... -
Investigation of the transcriptomic response in Atlantic salmon (Salmo salar) gill exposed to Paramoeba perurans during early onset of disease
Talbot, Anita; Gargan, Laura; Moran, Grainne; Prudent, Louis; O'Connor, Ian; Mirimin, Luca; Carlsson, Jens; MacCarthy, Eugene (Springer Nature, 2021-10-19)Amoebic Gill Disease (AGD), caused by the protozoan extracellular parasite Paramoeba perurans (P. perurans) is a disease affecting Atlantic salmon (Salmo salar). This study investigated the gill transcriptomic profile of ... -
Legacy and emerging contaminants in common guillemot Uria aalge eggs in Ireland and Wales
Power, Andrew; White, Philip; McHugh, Brendan; McGovern, Evin; Murphy, Sinéad; Berrow, Simon; Schlingermann, Moira; Gately, Cillian; Tannian, Marissa; Newton, Stephen; Crowley, Denis; O'Hea, Linda; Boyle, Brian; O'Connor, Ian (Elsevier Ltd, 2021-06-12)Guillemot eggs from multiple Irish colonies and one Welsh colony were analysed for legacy pollutants such as polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and other organochlorine compounds (OCs), ... -
Microplastics in brown trout (Salmo trutta Linnaeus, 1758) from an Irish riverine system
O'Connor, James D.; Murphy, Sinéad; Lally, Heather T.; O'Connor, Ian; Nash, Róisín; O'Sullivan, John; Bruen, Michael; Heerey, Linda; Koelmans, Albert A.; Cullagh, Alan; Cullagh, Declan; Mahon, Anne Marie (Elsevier B.V., 2020-09-01)Rivers play an important role in the overall transport of microplastic pollution (1 μm to 5 mm), with fluvial dynamics expected to influence biotic interactions, particularly for fish. So far, there have been few assessments ... -
Modelling the transfer and accumulation of microplastics in a riverine freshwater food web
O'Connor, James D.; Lally, Heather T.; Koelmans, Albert A.; Mahon, Anne Marie; O'Connor, Ian; Nash, Róisín; O'Sullivan, John J.; Bruen, Michael; Heerey, Linda; Murphy, Sinéad (Elsevier Ltd, 2022-02-26)Microplastics are a pervasive pollutant of aquatic ecosystems and are reported to interact with a wide range of aquatic biota. The complexities of natural food webs means that the transfer and accumulation of microplastics ... -
A note on long-distance matches of bottlenose dolphins (tursiops truncatus) around the Irish coast using photo-identification
O'Brien, Joanne; Berrow, Simon; Ryan, Conor; McGrath, David; O'Connor, Ian; Giovanna, Pesante; Burrows, Gary; Massett, Nick; Klotzer, Vanessa; Whooley, Padraig (International Whaling Commission, 2009-01)Images of 120 individual bottlenose dolphins from around the Irish coast were obtained from three photo-identification catalogues. Twenty three individuals were subsequently re-sighted, which is a re-sighting rate of 19%. ... -
Persistent pollutants in fresh and abandoned eggs of Common Tern (Sterna hirundo) and Arctic Tern (Sterna paradisaea) in Ireland
Power, Andrew; White, Philip; McHugh, Brendan; Berrow, Simon; Schlingermann, Moira; McKeown, Aaron; Cabot, David; Tannian, Marissa; Newton, Stephen; McGovern, Evin; Murphy, Sinéad; Crowley, Denis; O'Hea, Linda; Boyle, Brian; O'Connor, Ian (Elsevier Ltd, 2-05-03)Higher levels of persistent pollutants (Σ16PCB, Σ6PBDE, ΣHCH, ΣDDT, ΣCHL) were detected in fresh eggs of Common Terns Sterna hirundo from Rockabill Island near Dublin (Ireland's industrialised capital city) compared to ... -
Phytoplankton precision trials in the enumeration and identification of marine microalgae through the scheme “Biological Effects Quality Assurance in Monitoring Programmes (BEQUALM)”.
Salas, Rafael Gallardo (Galway-Mayo Institute of Technology, 2010)Scientists are coming under increased pressure in recent years to show that results they obtain arising from their scientific work are quality assured and stand up to scrutiny by independent expert auditors. This has meant ... -
Polycyclic aromatic hydrocarbons (PAHs) in seabird eggs in Ireland
Power, Andrew; White, Philip; McHugh, Brendan; Berrow, Simon; McKeown, Aaron; Crowley, Denis; Newton, Stephen; McGovern, Evin; Murphy, Sinéad; O'Connor, Ian (Elsevier Ltd, 2021-06-19)Seabird eggs are considered a favourable matrix for monitoring marine pollutants and are widely used as higher trophic level indicators. Concentrations of Polycyclic aromatic hydrocarbons (Σ15PAH) were determined in the ... -
Potential pathways, trophic transfer and bioindicators of microplastics in freshwater systems
O'Connor, James; Lally, Heather; Mahon, Anne Marie; O'Connor, Ian; Nash, Róisín; Jones, Noelle; Kelly, Mark; O'Sullivan, John; Bruen, Michael; Heerey, Linda; Koelmans, Albert; Murphy, Sinéad (2018-03)Microplastic (MP) polymers, 0.1 µm - 5 mm in size, are ubiquitous within aquatic environments. Due to their small size there is a risk that they may infiltrate and transfer within aquatic food webs. Though a limited number ... -
Prey preferences of sympatric fin (Balaenoptera physalus) and humpback (Megaptera novaeangliae) whales revealed by stable isotope mixing models
Ryan, Conor; Berrow, Simon; McHugh, Brendan; O'Donell, Ciaran; Trueman, Clive N.; O'Connor, Ian (2013)Over-exploitation of top predators and fish stocks has altered ecosystems towards less productive systems with fewer trophic levels. In the Celtic Sea (CS), discards and bycatch levels have prompted concern about some ... -
The use of deep water berths and the effect of noise on bottlenose dolphins in the Shannon Estuary cSAC
O'Brien, Joanne; Beck, Suzanne; Berrow, Simon; André, Michel; van der Schaar, Mike; O'Connor, Ian; McKeown, Eugene P. (2016)The Shannon Estuary on the west coast of Ireland is one of Europe’s premier deepwater berths catering for ships up to 200,000 deadweight tonnage. It is also Ireland’s only designated candidate special area of conservation ...