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Artetxe-Arrate I, Brophy D, Dettman DL, Lastra-Luque P, Varela JL, Oray I, Arrizabalaga H, Fraile I. Otolith-temperature estimates in Atlantic bluefin tuna (Thunnus thynnus) from the Mediterranean Sea: Insights from clumped isotope measurements. Mar Environ Res 2024; 193:106283. [PMID: 38128348 DOI: 10.1016/j.marenvres.2023.106283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 11/16/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023]
Abstract
The subpopulation and/or contingent structure of Atlantic bluefin tuna (Thunnus thynnus) within the Mediterranean Sea is undefined, leading to uncertainty regarding the best strategy for an effective assessment and management of this highly exploited stock. This study aimed to reconstruct temperatures experienced by Atlantic bluefin tuna during the early life period (<3.5 months) using clumped isotope temperature proxy, an innovative geothermometer for carbonates, that does not require previous knowledge of other environmental parameters such as water oxygen composition. We examined otolith chemistry in fish captured from 3 different areas of the Mediterranean Sea and adjacent waters. We found that mean seasonal temperature estimates from clumped isotopes did not differ significantly from satellite derived and otolith oxygen stable isotopic ratios derived temperatures, except for the central Mediterranean Sea, were clumped isotopes derived temperatures were significantly higher than satellite derived temperatures. However, the sensitivity of the clumped isotope thermometer was found to be lower than that based on oxygen fractionation equation, with high variance observed in the clumped isotopes derived temperature estimates. We also observed that clumped isotope derived temperatures were undistinguishable among bluefin tuna captured in the Gibraltar Strait, the central, and eastern Mediterranean Sea. In this paper, we discuss the major sources of uncertainty in temperature reconstructions using bluefin tuna otoliths.
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Affiliation(s)
- I Artetxe-Arrate
- AZTI, Marine Research, AZTI Basque Research and Alliance, Txatxarramendi ugartea z/g, 48395, Sukarrieta, Bizkaia, Spain.
| | - D Brophy
- Marine and Freshwater Research Centre, Atlantic Technological University - Galway City, Wellpark Road, Galway, H91 DY9Y, Ireland
| | - D L Dettman
- Environmental Isotope Laboratory, Department of Geosciences, University of Arizona, Tucson, AZ, 85721, USA
| | - P Lastra-Luque
- AZTI, Marine Research, AZTI Basque Research and Alliance, Txatxarramendi ugartea z/g, 48395, Sukarrieta, Bizkaia, Spain
| | - J L Varela
- Departamento de Biología, Universidad de Cádiz, Campus de Excelencia Internacional del Mar (CEI·MAR), Av. República Saharaui s/n, 11510, Puerto Real, Cádiz, Spain
| | - I Oray
- Istanbul University, Faculty of Aquatic Sciences, Vezneciler, Istanbul, Turkey
| | - H Arrizabalaga
- AZTI, Marine Research, AZTI Basque Research and Alliance, Txatxarramendi ugartea z/g, 48395, Sukarrieta, Bizkaia, Spain
| | - I Fraile
- AZTI, Marine Research, AZTI Basque Research and Alliance, Txatxarramendi ugartea z/g, 48395, Sukarrieta, Bizkaia, Spain
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Díaz-Arce N, Gagnaire PA, Richardson DE, Walter JF, Arnaud-Haond S, Fromentin JM, Brophy D, Lutcavage M, Addis P, Alemany F, Allman R, Deguara S, Fraile I, Goñi N, Hanke AR, Karakulak FS, Pacicco A, Quattro JM, Rooker JR, Arrizabalaga H, Rodríguez-Ezpeleta N. Unidirectional trans-Atlantic gene flow and a mixed spawning area shape the genetic connectivity of Atlantic bluefin tuna. Mol Ecol 2024; 33:e17188. [PMID: 37921120 DOI: 10.1111/mec.17188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 10/02/2023] [Accepted: 10/19/2023] [Indexed: 11/04/2023]
Abstract
The commercially important Atlantic bluefin tuna (Thunnus thynnus), a large migratory fish, has experienced notable recovery aided by accurate resource assessment and effective fisheries management efforts. Traditionally, this species has been perceived as consisting of eastern and western populations, spawning respectively in the Mediterranean Sea and the Gulf of Mexico, with mixing occurring throughout the Atlantic. However, recent studies have challenged this assumption by revealing weak genetic differentiation and identifying a previously unknown spawning ground in the Slope Sea used by Atlantic bluefin tuna of uncertain origin. To further understand the current and past population structure and connectivity of Atlantic bluefin tuna, we have assembled a unique dataset including thousands of genome-wide single-nucleotide polymorphisms (SNPs) from 500 larvae, young of the year and spawning adult samples covering the three spawning grounds and including individuals of other Thunnus species. Our analyses support two weakly differentiated but demographically connected ancestral populations that interbreed in the Slope Sea. Moreover, we also identified signatures of introgression from albacore (Thunnus alalunga) into the Atlantic bluefin tuna genome, exhibiting varied frequencies across spawning areas, indicating strong gene flow from the Mediterranean Sea towards the Slope Sea. We hypothesize that the observed genetic differentiation may be attributed to increased gene flow caused by a recent intensification of westward migration by the eastern population, which could have implications for the genetic diversity and conservation of western populations. Future conservation efforts should consider these findings to address potential genetic homogenization in the species.
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Affiliation(s)
- Natalia Díaz-Arce
- AZTI, Marine Research, Basque Research and Technology Alliance (BRTA), Sukarrieta, Spain
| | | | - David E Richardson
- Northeast Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration (NOAA), Narragansett, Rhode Island, USA
| | - John F Walter
- Southeast Fisheries Sciences Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration (NOAA), Miami, Florida, USA
| | | | | | - Deirdre Brophy
- Marine and Freshwater Research Center, Atlantic Technological University (ATU), Galway City, Ireland
| | - Molly Lutcavage
- Large Pelagics Research Center, School for the Environment, University of Massachusetts Boston, Gloucester, Massachusetts, USA
| | - Piero Addis
- Department of Environmental and Life Science, University of Cagliari, Cagliari, Italy
| | - Francisco Alemany
- International Commission for the Conservation of Atlantic Tunas, GBYP, Madrid, Spain
| | - Robert Allman
- National Marine Fisheries Service, Southeast Fisheries Science Center, Panama City Laboratory, Panama City, Florida, USA
| | | | - Igaratza Fraile
- AZTI, Marine Research, Basque Research and Technology Alliance (BRTA), Pasaia, Spain
| | - Nicolas Goñi
- AZTI, Marine Research, Basque Research and Technology Alliance (BRTA), Pasaia, Spain
| | - Alex R Hanke
- St Andrews Biological Station, Fisheries and Oceans Canada, St. Andrews, New Brunswick, Canada
| | | | - Ashley Pacicco
- Cooperative Institute for Marine and Atmospheric Studies Rosenstiel School of Marine, Atmospheric and Earth Science, University of Miami, Miami, Florida, USA
| | - Joseph M Quattro
- Department of Biological Sciences, University of South Carolina, Columbia, South Carolina, USA
| | - Jay R Rooker
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, Texas, USA
| | - Haritz Arrizabalaga
- AZTI, Marine Research, Basque Research and Technology Alliance (BRTA), Pasaia, Spain
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Reis-Santos P, Gillanders BM, Sturrock AM, Izzo C, Oxman DS, Lueders-Dumont JA, Hüssy K, Tanner SE, Rogers T, Doubleday ZA, Andrews AH, Trueman C, Brophy D, Thiem JD, Baumgartner LJ, Willmes M, Chung MT, Charapata P, Johnson RC, Trumble S, Heimbrand Y, Limburg KE, Walther BD. Reading the biomineralized book of life: expanding otolith biogeochemical research and applications for fisheries and ecosystem-based management. Rev Fish Biol Fisheries 2023; 33:411-449. [PMID: 0 DOI: 10.1007/s11160-022-09720-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 07/15/2022] [Indexed: 05/26/2023]
Abstract
AbstractChemical analysis of calcified structures continues to flourish, as analytical and technological advances enable researchers to tap into trace elements and isotopes taken up in otoliths and other archival tissues at ever greater resolution. Increasingly, these tracers are applied to refine age estimation and interpretation, and to chronicle responses to environmental stressors, linking these to ecological, physiological, and life-history processes. Here, we review emerging approaches and innovative research directions in otolith chemistry, as well as in the chemistry of other archival tissues, outlining their value for fisheries and ecosystem-based management, turning the spotlight on areas where such biomarkers can support decision making. We summarise recent milestones and the challenges that lie ahead to using otoliths and archival tissues as biomarkers, grouped into seven, rapidly expanding and application-oriented research areas that apply chemical analysis in a variety of contexts, namely: (1) supporting fish age estimation; (2) evaluating environmental stress, ecophysiology and individual performance; (3) confirming seafood provenance; (4) resolving connectivity and movement pathways; (5) characterising food webs and trophic interactions; (6) reconstructing reproductive life histories; and (7) tracing stock enhancement efforts. Emerging research directions that apply hard part chemistry to combat seafood fraud, quantify past food webs, as well as to reconcile growth, movement, thermal, metabolic, stress and reproductive life-histories provide opportunities to examine how harvesting and global change impact fish health and fisheries productivity. Ultimately, improved appreciation of the many practical benefits of archival tissue chemistry to fisheries and ecosystem-based management will support their increased implementation into routine monitoring.
Graphical abstract
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Lyashevska O, Brophy D, Wing S, Johns DG, Haberlin D, Doyle TK. Evidence of a range expansion in sunfish from 47 years of coastal sightings. Mar Biol 2022; 169:20. [PMID: 35221377 PMCID: PMC8827117 DOI: 10.1007/s00227-021-04005-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 12/06/2021] [Indexed: 06/14/2023]
Abstract
UNLABELLED Almost nothing is known about the historical abundance of the ocean sunfish. Yet as an ecologically and functionally important taxa, understanding changes in abundance may be a useful indicator of how our seas are responding to anthropogenic changes including overfishing and climate change. Within this context, sightings from a coastal bird observatory (51.26 ∘ N, 9.30 ∘ W) over a 47 year period (from April to October 1971-2017) provided the first long-term index of sunfish abundance. Using a general linear mixed effect model with a hurdle to deal with imperfect detectability and to model trends, a higher probability of detecting sunfish was found in the 1990s and 2000s. Continuous Plankton Recorder (CPR) phytoplankton color indices and the annual mean position of the 13 ∘ C sea surface isotherm were significantly correlated with the probability of detecting sunfish. An increase in siphonophore abundance (as measured by the CPR) was also documented. However, this increase occurred 10-15 years after the sunfish increase and was not significantly correlated with sunfish abundance. Our results suggest that the observed increase in sunfish sightings is evidence of a range expansion because it was significantly correlated with the mean position of the 13 ∘ C isotherm which moved northwards by over 200 km. Furthermore, the observed increase in sunfish occured 10 years before sunfish sightings are documented in Icelandic and Norwegian waters, and was concurrent with well-known range expansions for other fish species during the 1990s. This study demonstrates how sustained citizen science projects can provide unique insights on the historical abundance of this enigmatic species. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s00227-021-04005-8.
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Affiliation(s)
- Olga Lyashevska
- Marine and Freshwater Research Centre, Galway Mayo Institute of Technology, Galway, Ireland
| | - Deirdre Brophy
- Marine and Freshwater Research Centre, Galway Mayo Institute of Technology, Galway, Ireland
| | - Steve Wing
- Cape Clear Bird Observatory, Birdwatch Ireland, Wicklow, Ireland
| | - David G. Johns
- The Marine Biological Association of the UK, Plymouth, UK
| | - Damien Haberlin
- Science Foundation Ireland Research Centre for Energy, Climate and Marine, Environmental Research Centre, University College Cork, Cork, Ireland
| | - Thomas K. Doyle
- Science Foundation Ireland Research Centre for Energy, Climate and Marine, Environmental Research Centre, University College Cork, Cork, Ireland
- School of Biological, Earth and Environmental Sciences, University College Cork, Cork, Ireland
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O'Toole C, Weigum E, Graham CT, White P, Samways K, Hayden B, Brophy D. Acid treatment of Atlantic salmon (Salmo salar) scales prior to analysis has negligible effects on δ 13C and δ 15N isotope ratios. J Fish Biol 2020; 97:1285-1290. [PMID: 33448381 PMCID: PMC7693048 DOI: 10.1111/jfb.14501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 08/12/2020] [Accepted: 08/12/2020] [Indexed: 06/12/2023]
Abstract
There is debate in the literature as to whether scales of fishes require acidification to remove inorganic carbonates prior to stable isotope analysis. Acid-treated and untreated scales from 208 Atlantic salmon from nine locations on both sides of the Atlantic were analysed for δ13C and δ15N. Linear mixed-effect models determined the effect of acid treatment to be statistically significant. However, the mean difference was small (δ13C 0.1 ± 0.2‰, δ15N -0.1 ± 0.2‰) and not of biological relevance. This study concludes that Atlantic salmon scales do not need to be acidified prior to stable isotope analysis.
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Affiliation(s)
- Christina O'Toole
- Marine and Freshwater Research Centre, Galway-Mayo Institute of Technology, Galway, Ireland
| | - Emily Weigum
- Biology Department, University of New Brunswick, Fredericton, New Brunswick, Canada
| | - Conor T Graham
- Marine and Freshwater Research Centre, Galway-Mayo Institute of Technology, Galway, Ireland
| | - Philip White
- Marine and Freshwater Research Centre, Galway-Mayo Institute of Technology, Galway, Ireland
| | - Kurt Samways
- Department of Biological Sciences, University of New Brunswick, Saint John, New Brunswick, Canada
| | - Brian Hayden
- Biology Department, University of New Brunswick, Fredericton, New Brunswick, Canada
| | - Deirdre Brophy
- Marine and Freshwater Research Centre, Galway-Mayo Institute of Technology, Galway, Ireland
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Brophy D, Rodríguez-Ezpeleta N, Fraile I, Arrizabalaga H. Combining genetic markers with stable isotopes in otoliths reveals complexity in the stock structure of Atlantic bluefin tuna (Thunnus thynnus). Sci Rep 2020; 10:14675. [PMID: 32895410 PMCID: PMC7477220 DOI: 10.1038/s41598-020-71355-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 08/13/2020] [Indexed: 11/09/2022] Open
Abstract
Atlantic bluefin tuna (Thunnus thynnus) from the two main spawning populations in the Mediterranean and Gulf of Mexico occur together in the western, central and eastern Atlantic. Stock composition of catches from mixing areas is uncertain, presenting a major challenge to the sustainable management of the fisheries. This study combines genetic and chemical markers to develop an integrated method of population assignment. Stable isotope signatures (δ13C and δ18O) in the otolith core of adults from the two main spawning populations (adult baselines) showed less overlap than those of yearlings (12-18 months old) from western and eastern nursery areas suggesting that some exchange occurs towards the end of the yearling phase. The integrated model combined δ18O with four genetic markers (SNPs) to distinguish the adult baselines with greater accuracy than chemical or genetic markers alone. When used to assign individuals from the mixing areas to their population of origin, the integrated model resolved some (but not all) discrepancies between the chemistry and genetic methods. Some individuals in the mixing area had otolith δ18O values and genetic profiles which when taken together, were not representative of either population. These fish may originate from another Atlantic spawning area or may represent population contingents that move away from the main spawning areas during the first year of life. This complexity in stock structure is not captured by the current two-stock model.
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Affiliation(s)
- Deirdre Brophy
- Marine and Freshwater Research Centre, Galway Mayo Institute of Technology, Dublin road, Galway, H91 T8NW, Ireland.
| | | | - Igaratza Fraile
- Marine Research Division, AZTI, Txatxarramendi Ugartea Z/G, 48395, Sukarrieta, Bizkaia, Spain
| | - Haritz Arrizabalaga
- Marine Research Division, AZTI, Txatxarramendi Ugartea Z/G, 48395, Sukarrieta, Bizkaia, Spain
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Bennion M, Morrison L, Brophy D, Carlsson J, Abrahantes JC, Graham CT. Trace element fingerprinting of blue mussel (Mytilus edulis) shells and soft tissues successfully reveals harvesting locations. Sci Total Environ 2019; 685:50-58. [PMID: 31174123 DOI: 10.1016/j.scitotenv.2019.05.233] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 05/13/2019] [Accepted: 05/16/2019] [Indexed: 06/09/2023]
Abstract
Globally, aquaculture products are expected to account for >60% of total seafood produce by 2030. In the European Union, the seafood sector is of considerable economic importance to member states with household spending on seafood produce totalling €54.8 billion in 2016. Within the EU, shellfish aquaculture supports livelihoods and employment in many rural communities throughout the region. Harmful algal blooms pose considerable risk to consumer safety and in turn, stability of the shellfish market. If contaminated produce was to make it to the market the health risk to the public could be considerable, but the damage to the sector through loss of trust in producers would also be significant. Mytilus edulis account for a considerable portion of the aquaculture sector in the Northeast Atlantic. At present, no scientific tool is available to industry regulators, to allow them to trace mussel produce to its source, uphold food safety standards and ensure consumer confidence. The present study uses chemical analysis of shells and soft tissues to classify individual M. edulis to their site of harvest. The use of random forest classification of trace element composition has revealed location specific elemental signatures for all examined sites. This led to the correct classification of 100% of individuals sampled to their respective harvesting locations, including two sites located just 6 km apart within the same bay. The protocol demonstrated here provides the basis for a scientifically driven traceability framework for shellfish produce.
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Affiliation(s)
- Matthew Bennion
- Marine and Freshwater Research Centre, Galway-Mayo Institute of Technology, Dublin Road, Galway, Ireland
| | - Liam Morrison
- Earth and Ocean Sciences, School of Natural Sciences and Ryan Institute, National University of Ireland, Galway, Ireland
| | - Deirdre Brophy
- Marine and Freshwater Research Centre, Galway-Mayo Institute of Technology, Dublin Road, Galway, Ireland
| | - Jens Carlsson
- Area52 Research Group, School of Biology and Environmental Science/Earth Institute, University College Dublin, Dublin, Ireland
| | - José Cortiñas Abrahantes
- Assessment and Methodological Support Unit, European Food Safety Authority, Carlo Magno 1A, Parma, Italy
| | - Conor T Graham
- Marine and Freshwater Research Centre, Galway-Mayo Institute of Technology, Dublin Road, Galway, Ireland.
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Thomas K, Hansen T, Brophy D, Ó Maoiléidigh N, Fjelldal PG. Experimental investigation of the effects of temperature and feeding regime on scale growth in Atlantic salmon Salmo salar post-smolts. J Fish Biol 2019; 94:896-908. [PMID: 30887504 DOI: 10.1111/jfb.13971] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 03/18/2019] [Indexed: 06/09/2023]
Abstract
Salmo salar post-smolts were reared in seawater under controlled laboratory conditions for 12 weeks. The fish were exposed to three constant temperature treatments (15, 10.5 and 6°C) and four feeding treatments (constant feeding, food withheld for 7 days, food withheld for 14 days and food withheld intermittently for four periods of 7 days). Scale growth was proportional to fish growth across all treatments, justifying the use of scale measurements as a proxy for growth during the early marine phase. The rate of circuli deposition was dependant on temperature and feeding regime and was generally proportional to fish growth but with some decoupling of the relationship at 15°C. Deposition rates varied from 4.8 days per circulus at 15°C (constant feeding) to 15.1 days per circulus at 6°C (interrupted feeding). Cumulative degree day (° D) was a better predictor of circuli number than age, although the rate of circuli deposition ° D-1 was significantly lower at 6°C compared with 15 and 10.5°C. Inter-circuli distances were highly variable and did not reflect growth rate; tightly packed circuli occurred during periods without food when growth was depressed, but also during periods of rapid growth at 15°C. The results further current understanding of scale growth properties and can inform investigations of declining marine growth in S. salar based on interpretations of scale growth patterns.
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Affiliation(s)
- Katie Thomas
- Department of Natural Sciences, Marine and Freshwater Research Centre, Galway Mayo Institute of Technology, Galway, Ireland
- Fisheries and Ecosystems Advisory Services, Marine Institute, Furnace, Newport, Co. Mayo, Ireland
| | - Tom Hansen
- Reproduction and growth research group, Institute of Marine Research, Matre Aquaculture Research Station, Matredal, Norway
| | - Deirdre Brophy
- Department of Natural Sciences, Marine and Freshwater Research Centre, Galway Mayo Institute of Technology, Galway, Ireland
| | - Niall Ó Maoiléidigh
- Fisheries and Ecosystems Advisory Services, Marine Institute, Furnace, Newport, Co. Mayo, Ireland
| | - Per Gunnar Fjelldal
- Reproduction and growth research group, Institute of Marine Research, Matre Aquaculture Research Station, Matredal, Norway
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Alabdulghani F, O'Brien A, Brophy D. Application of cone-beam computed tomography angiography in a uterine fibroid embolization procedure: A case report. Radiol Case Rep 2018; 13:130-134. [PMID: 29487648 PMCID: PMC5826697 DOI: 10.1016/j.radcr.2017.09.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Revised: 09/12/2017] [Accepted: 09/25/2017] [Indexed: 11/18/2022] Open
Abstract
One of the main causes of failure in uterine fibroid embolization procedures is incomplete infarction of the fibroid due to alternate vascular supply to the fibroid which was not identified by the operator. Cone-beam computed tomography angiography was used in this case to avoid nontarget embolization via a uterine artery, as well as identify incomplete embolization of the fibroid. This prompted a search for variant vascular supply to the fibroid, which was found to be originating from the right ovarian artery. Therefore, the use of cone-beam computed tomography angiography led to a successful outcome, which otherwise may not have been achieved.
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Affiliation(s)
- F. Alabdulghani
- Department of Radiology, St. Vincent's University Hospital, Elm Park, 196 Merrion Rd, Dublin 4, Ireland
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Kelly ME, Heeney A, Redmond CE, Costelloe J, Nason GJ, Ryan J, Brophy D, Winter DC. Incidental findings detected on emergency abdominal CT scans: a 1-year review. ACTA ACUST UNITED AC 2016; 40:1853-7. [PMID: 25576049 DOI: 10.1007/s00261-015-0349-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
INTRODUCTION In recent years, there has been a substantial rise in the use of computed tomography (CT) in the emergency medicine setting. Accordingly, with increased CT usage there has been an upsurge in incidental pathology detection. METHODS A retrospective review of all emergency CT abdominal scans performed at a university teaching hospital was examined. The frequency of incidental findings, their clinical significance and workload effect for the radiology department was assessed. RESULTS 1155 patients had an emergency abdominal CT scan of which 700 had incidental findings detected. Of the incidental findings, 143 were deemed indeterminate requiring urgent investigations. Twenty-four occult neoplasms were confirmed subsequently. Additionally, 259 patients were recommended for additional diagnostics. The cumulative effect of the initial emergency abdominal CT was 15,015 relative value units (RVU). Subsequent imaging of incidental findings resulted in another 1674 RVU workload for radiology. CONCLUSION Incidental findings cause considerable debate and concern over which patients require significant follow-up, investigations, and/or surveillance. This exerts significant pressures on sub-specialties for their expert input, with increased workload and implications on healthcare service provision.
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Affiliation(s)
- M E Kelly
- Department of Surgery, St Vincent's University Hospital, Elm Park, Dublin 4, Ireland,
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11
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Haynes PS, Brophy D, McGrath D. The timing of early life events and growth rate estimates of age-0 year group brill Scophthalmus rhombus along the west coast of Ireland. J Fish Biol 2014; 84:225-230. [PMID: 24383806 DOI: 10.1111/jfb.12234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Accepted: 08/14/2013] [Indexed: 06/03/2023]
Abstract
The timing of spawning and hatching, larval durations and growth exhibited by juvenile brill Scophthalmus rhombus captured along the Irish west coast were estimated using otolith microstructure analysis. Scophthalmus rhombus were estimated to have hatched between February and May, with fish settling onto nursery grounds between March and June. Fish collected later on in the season exhibited higher otolith growth rates in comparison to earlier collected fish. This is the first study to describe the early life history of a commercially valuable but understudied flatfish species.
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Affiliation(s)
- P S Haynes
- Marine and Freshwater Research Centre, Department of Life Sciences, Galway-Mayo Institute of Technology, Dublin Road, Galway, Ireland
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12
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Haynes PS, Brophy D, De Raedemaecker F, McGrath D. The feeding ecology of 0 year-group turbot Scophthalmus maximus and brill Scophthalmus rhombus on Irish west coast nursery grounds. J Fish Biol 2011; 79:1866-1882. [PMID: 22141892 DOI: 10.1111/j.1095-8649.2011.03128.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
On sandy beach nursery grounds along the west coast of Ireland, 0 year-group turbot Scophthalmus maximus were found to consume six types of crustaceans, in addition to polychaetes. The 0 year-group brill Scophthalmus rhombus fed almost exclusively on mysids, even though nine taxonomic prey groups were identified in the sediment across the investigated beaches. Both species avoided non-motile organisms such as gastropods and bivalves, which were present in high abundances in the sediment and their growth and condition was not significantly related to the quantity or type of prey consumed, temperature or salinity. A high incidence of feeding was detected for both species over the duration of the study, suggesting that food was not limiting on west of Ireland nursery grounds. Temporal partitioning of settlement was detected between S. maximus and S. rhombus, indicating that inter-specific competition for food does not occur between these two flatfish species on west of Ireland nursery grounds.
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Affiliation(s)
- P S Haynes
- Commercial Fisheries Research Group, Department of Life Sciences, Galway-Mayo Institute of Technology, Galway, Ireland.
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13
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De Raedemaecker F, O'Connor I, Brophy D, Black A. Macrobenthic prey availability and the potential for food competition between 0 year group Pleuronectes platessa and Limanda limanda. J Fish Biol 2011; 79:1918-1939. [PMID: 22141895 DOI: 10.1111/j.1095-8649.2011.03134.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This study describes the feeding habits of plaice Pleuronectes platessa and dab Limanda limanda during early juvenile development and relates differences between nursery grounds and sampling years to spatial and temporal variabilities in macrobenthic prey availability. The main prey taxa of both species were copepods, bivalves, amphipods, polychaetes and oligochaetes and size-related variation in diet was found. Despite considerable similarity in the prey items, differences in food composition between the two species were observed and spatial variability in diet confirmed their opportunistic feeding behaviour. A high degree of dietary overlap was found in June and decreased steadily throughout the season. The prey composition in the guts of both species largely reflected the composition of the main macrobenthic taxa in the sediment. The overall data suggest that resources were not limiting in the littoral sandy nursery areas in the west of Ireland and no indications were found that exploitative competitive forces upon the benthic prey assemblages occurred between P. platessa and L. limanda. Feeding success, Fulton's K condition and dietary overlap, however, showed spatial and temporal variations, and were probably affected by the availability and density of macrobenthic prey.
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Affiliation(s)
- F De Raedemaecker
- Marine and Freshwater Research Centre, Department of Life and Physical Sciences, Galway-Mayo Institute of Technology, Dublin Road, Galway, Ireland.
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Shephard S, Thorley JL, Brophy D, Hiddink JG, Stokes D, Reid DG. Benthivorous fish may go hungry on trawled seabed. Proc Biol Sci 2011; 278:2240. [DOI: 10.1098/rspb.2010.2713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Davey C, Cannon A, Brophy D, O'Sullivan G. Abstract No. 385: A preclinical evaluation of the healing response of a novel chronic CVC cuff. J Vasc Interv Radiol 2011. [DOI: 10.1016/j.jvir.2011.01.422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Collins D, Moloney MA, O'Donnell D, Brophy D, Sheehan SJ. Acute aortic occlusion in a patient with heparin-induced thrombocytopenia treated by thrombectomy. Ir J Med Sci 2010; 181:397-400. [PMID: 20665120 DOI: 10.1007/s11845-010-0531-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2009] [Accepted: 07/08/2010] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Heparin-induced thrombocytopenia syndrome (HITS) is an infrequent complication of heparin anticoagulation. CASE REPORT We present the case of a 44-year-old male who was admitted with acute ischaemia of his right lower limb. He was initially treated with unfractionated heparin and thrombolysis, but subsequently developed acute aortic thrombosis 8 days following initiation of heparin therapy. This was treated with bilateral per-femoral thrombectomy with curative result. CONCLUSION This case report draws the attention of surgeons to the difficulties in diagnosing HITS and highlights the multidisciplinary management of a complicated case of acute ischaemia.
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Affiliation(s)
- D Collins
- Department of Vascular Surgery, St. Vincent's University Hospital, Elm Park, Dublin 4, Ireland.
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MacGiobain S, Quinlan JF, O'Malley N, Brophy D, Quinlan WR. Isolated proximal tibiofibular joint dislocation in an elite rugby union player. Br J Sports Med 2008; 42:306-7. [DOI: 10.1136/bjsm.2007.043638] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Faries PL, Brophy D, LoGerfo FW, Akbari CM, Campbell DR, Spence LD, Hook SC, Pomposelli FB. Combined iliac angioplasty and infrainguinal revascularization surgery are effective in diabetic patients with multilevel arterial disease. Ann Vasc Surg 2001; 15:67-72. [PMID: 11221947 DOI: 10.1007/s100160010012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The success of percutaneous transluminal angioplasty (PTA) in the treatment of common and external iliac atherosclerotic lesions has been established for the general population. However, several studies have suggested that the presence of diabetes may reduce the effectiveness of iliac angioplasty, particularly in the setting of limb-threatening ischemia requiring concomitant lower extremity revascularization. This study compared the results of iliac artery PTA performed in conjunction with infrainguinal bypass for limb-threatening ischemia for diabetic (DM) and nondiabetic (non-DM) patients. Between 1991 and 2000, 159 PTA were performed in 126 patients (DM = 99/79%, non-DM = 27/21%) in conjunction with subsequent infrainguinal bypass for limb-threatening ischemia (gangrene = 42%, ulcer = 36%, rest pain = 22%). These patients were followed prospectively using a computerized vascular registry. Stents were placed in 34 (21.4%) cases for suboptimal angioplasty results. In this study the combined use of standard surgical and endoluminal modalities for the treatment of multilevel arterial occlusive disease resulted in excellent cumulative patency and limb salvage rates. The presence of diabetes did not alter these favorable results. Multimodal vascular therapy may be used effectively in diabetic patients with limb-threatening ischemia due to multiple levels of arterial occlusion.
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Affiliation(s)
- P L Faries
- Department of Surgery, Mount Sinai School of Medicine, New York, NY, USA.
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Kirby B, Keaveney A, Brophy D, O'Donoghue D, Rogers S. Abnormal liver function tests induced by dapsone in a patient with dermatitis herpetiformis and primary sclerosing cholangitis. Br J Dermatol 1999; 141:172-3. [PMID: 10417547 DOI: 10.1046/j.1365-2133.1999.02955.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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O'Riordan JI, Doherty C, Javed M, Brophy D, Hutchinson M, Quinlan D. Do alpha-blockers have a role in lower urinary tract dysfunction in multiple sclerosis? J Urol 1995; 153:1114-6. [PMID: 7869476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Lower urinary tract dysfunction is a major cause of morbidity in patients with multiple sclerosis. alpha 1-Adrenergic receptors are present at the bladder neck, where increased tone may be responsible for urinary retention and diminished flow rates. A randomized placebo controlled study was designed to test the hypothesis that blockade of these receptors using the selective alpha 1-adrenergic receptor antagonist indoramin would improve bladder emptying in patients with multiple sclerosis. Peak and mean urinary flow rates, residual volume and symptom score were evaluated at trial entry and again after 4 weeks in 18 men with multiple sclerosis. There was a mean 41% improvement in peak flow rate in the actively treated group compared with a 7.4% deterioration in the placebo group (p < 0.05). Residual volume improved in both groups. Patients taking indoramin reported a greater improvement in urinary symptoms. Modulation of the alpha 1-receptor may have a role in the management of lower urinary tract dysfunction in multiple sclerosis.
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Affiliation(s)
- J I O'Riordan
- Department of Neurology, St. Vincent's Hospital, Dublin, Ireland
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Abuzakouk M, Feighery C, Jones E, O’Briain S, Goggins M, Weir DG, Case E, O’Farrelly C, Weir DG, Casey E, Donnelly S, McGonigle D, Casey EB, Kelleher D, McCreary C, Long A, Hall N, Murphy A, McGonagle D, Salha H, Ryan R, Molloy G, Doherty E, Mulherin D, Bresnihan E, McKane R, Taggart A, Bell A, Costello P, Murphy E, Fitzgerald O, Bresnihan B, Gaffney K, Coumbe A, Blades S, Blake D, Cookson J, Bruce IN, McNally JA, Bell AL, McGonagal D, Costigan T, Hemyrick L, O’Riordan J, McCann S, Eustace J, Brophy D, Gibney R, Adams C, Mulcahy B, Waldron-Lynch F, Phelan M, Shanahan F, Molloy M, O’Gara F, McDermott M, Kastner DL, Kilmartin D, Sant SM, Byrne D, Mulligan E, Callaghan M, Lovis R, Lu Y, Pope R, Kavanagh R, Workman E, Nash P, Smith M, Hazleman BL, Hunter JO, Veale DJ, Kirk G, McLaren M, Belch JJF, Veal DJ, D’Arrigo C, Couto JC, Mullan E, O’Brien A, Bury G, Brereton J, Wright GD, McCarron MO, Roberts SD, Taggart AJ, Gardiner PV, Hopkins R, McEvoy F, Bird HA, Wright V, Foley-Nolan D, Isdale AH, Roberts MET, Bottomley W, Isdale A, Martin M, Goodfield M, Buchan PC, Gooi HC, Kane P, Finch MB, Veale DJ, Veale DJ, Mulcahy H, Skelly M, Saunders A, O’Donoghue D, McCarthy D, Dunne J, Whelan A, Guerin J, Sim RB, Jackson J, Forde AM, O’Connor C. Irish society for rheumatology Proceedings of Annual General Meeting held 14th October, 1994 at St. James’s Hospital, Dublin 8. Ir J Med Sci 1995. [DOI: 10.1007/bf02968124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mulherin D, FitzGerald O, Bresnihan B, Yanni G, Farahat M, Posten R, Panayi GS, Abuzakouk M, Feighery C, Casey E, Weir D, Farrelly CO, Bell AL, Magill KM, McKane JR, Kirk F, Irvine AE, Kelleher D, Hall N, Murphy A, Long A, O’Farrelly C, Casey EB, McCarthy J, Cushnaghan JJ, Dieppe PA, O’Duffy JD, Lie JT, Ehman R, Engel AG, Sitiny M, Ryan J, Plunkett P, Jackson J, O’Connell PG, Siegel KL, Stanhope S, Gerber LH, Phelan MJI, Williams C, Williams J, Smith T, Ghadiali E, Bucknall R, Golding DN, McCarthy C, Cushnaghan J, Dieppe P, Eustace S, Griffin S, Legge D, O’Byrne J, Breathnach E, Beausang O, Stack J, Stephens MM, Srinivasan U, Harrison M, Coughlan B, Heffernan M, Foley-Nolan D, Rowbotham D, Kearney M, O’Mally A, Dyson H, Martin M, Hassan J, Fitzgerald MX, Whelan A, Camilleri F, Cunnane G, Arora A, Bonnar J, Chua A, Keeling PWN, Lynch M, Garrahy A, Mulcahy FM, Sant S, Cahill R, Gilvarry J, Beattie S, Hamilton H, O’Morain C, Mulcahy D, McDermott M, Molloy MG, Cashin P, McConneir F, O’Gara F, McCabe M, Brophy D, Gibney R, Choy E, Kingsley GH, Wallace E, Forde AM, Feighery D, Sim RB, Donnelly S, Lau S, Veal D, McLaren M, Bancroft AJ, Belch JJF, Coughlan RJ, Crockard AD, Thompson JM, McBride SJ, Edgar JD, McNeill TA, Campbell A, Byrne J, Hough Y, Hunt J, Lynch MP, Nuallain EMO, Monaghan H, Reen DJ, Winska-Wiloch H, Isenberg DA. Irish association of rheumatology & rehabilitation. Ir J Med Sci 1993. [DOI: 10.1007/bf02960730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
We evaluated the influence of dialysis requiring acute tubular necrosis on patient survival, and kidney survival and function in all 182 patients who needed dialysis immediately after transplantation at the University of Minnesota Hospitals. When compared to matched control patients not requiring dialysis, there was no difference at any point in patient survival. At 1 month there were more kidneys lost in the patients who developed acute tubular necrosis, but this difference was not present at 3 months or later. Acute tubular necrosis is a relatively innocent complication of renal transplantation and, if one avoids assaulting patients with invasive diagnostic procedures, does not give rise to an increased mortality nor, in the long run, to an increased loss of kidneys. Therefore, kidneys should not be discarded because of fear they might develop this complication.
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