NRW_DS110126 eng dataset Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en pointOfContact 2026-03-03T14:27:59 MEDIN 3.1.2 wel eng utf8 British National Grid (EPSG::27700) Studies and Biometric Gut Content Analyses of Common Scoter Melanitta nigra nigra Killed During the Sea Empress Oil Spill Studies and Biometric Gut Content Analyses of Common Scoter Melanitta nigra nigra Killed During the Sea Empress Oil Spill Astudiaethau a dadansoddiad o gynnwys perfeddion mor-hwyaid duon Melanitta nigra nigra a laddwyd yn ystod damwain olew y Sea Empress 1997-11-30 publication 4f4c4942-4343-5764-6473-313130313236 Carmarthen Bay is the most important wintering site for Common Scoters in the UK. It is estimated that the Sea Empress oil spill in February 1996 resulted in the deaths of at least 4,500 Common Scoter. This dataset contains the results of a study to describe the population structure, body condition, level of oiling, biometrics, moult, diet and cause of death of Common Scoters killed by the Sea Empress oil spill, and to investigate factors affecting body condition, diet and cause of death. Data captured in order to describe the biometrics and moult of Common Scoters killed in the Sea Empress oil spill, to determine the age structure of killed birds, and to determine the diet of birds through gut contents analysis. All data is held within the reports. Carmarthen Bay is the most important wintering site for Common Scoters in the UK. It is estimated that the Sea Empress oil spill in February 1996 resulted in the deaths of at least 4,500 Common Scoter. This dataset contains the results of a study to describe the population structure, body condition, level of oiling, biometrics, moult, diet and cause of death of Common Scoters killed by the Sea Empress oil spill, and to investigate factors affecting body condition, diet and cause of death. Data captured in order to describe the biometrics and moult of Common Scoters killed in the Sea Empress oil spill, to determine the age structure of killed birds, and to determine the diet of birds through gut contents analysis. All data is held within the reports. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en owner Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en custodian Wildfowl and Wetlands Trust (WWT). WWT Wetlands Advisory Service. c/o Wildlife and Wetlands Trust, Slimbridge, Gloucestershire enquiries@wwt.org.uk http://www.wwt.org.uk/ originator Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en distributor notPlanned Species distribution theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Milford Haven biometrics (biometry) starvation moult gut content analysis oiled birds wintering site muscle wastage marine and freshwater inventory fat reserves melanitta nigra Carmarthen Bay diets body condition population structure common scoter (black scoter) Sea Empress theme NRW Thesaurus 2025-01-08 publication geonetwork.thesaurus.local.theme.converted_nrw-keywords Bird taxonomy-related abundance per unit area of surface theme SeaDataNet Parameter Discovery Vocabulary 2024-06-19 publication geonetwork.thesaurus.external.theme.rdf+xml Oil spillage theme IPSV Subjects List 2020-11-18 publication geonetwork.thesaurus.external.theme.subjects otherRestrictions There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations otherRestrictions © CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. vector eng utf8 biota NRW Geographic Identifiers Collection 2024-01-01 publication SIR GAERFYRDDIN - CARMARTHENSHIRE NRW Geographic Identifiers Collection 2024-01-01 publication Wales (WLS) -4.68592506 -4.28228079 51.54092085 51.75118019 SeaVoX Vertical Co-ordinate Coverages 2013-02-05 creation water column boundary layer 1996-02-24 1996-03-02 Hughes, B., Stewart, B., Brown, M., Hearn, R. 1997. Studies of Common scoter Melanitta nigra nigra killed during the Sea Empress oil Spill. Final Report to SEEEC, CCW Sea Empress Science Report 233. Hughes, B., Stewart, B., Brown, M., Hearn, R. 1996. Biometric and Gut Contents Analysis of Common Scoter Melanitta Nigra Nigra. Preliminary Report to SEEEC, CCW Sea Empress Science Report 233a. Documents [A] The reports are held in the following formats (MS Word, PDF format, WPD) [B] Application (LHA.EXE and SEEECSCO.EXE unknown application files) dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false After retrieval of Common Scoters killed during the Sea Empress oil spill were stored at the National Museum of Wales and catalogued in terms of date and location of recovery, rehabilitation status (i.e. whether or not birds had been supplied from bird hospitals), and condition of corpse (Howlett 1996). Birds transported to WWT Slimbridge where every specimen was further categorised in terms of the degree of oiling suffered, physical condition, sex and age. The level of oiling was scored from 0 to 4. The amount of fat reserves present was ascertained by dissection and scored from 0 to 4. During the biometrics and moult study, the oesophagus, proventriculus and gizzard of each bird were removed and immediately frozen at -20 degrees C. Gut contents were extracted for analysis at a later date. As the proportion of Common Scoters with food in the oesophagus or proventriculus was very low ( less than 1% in the preliminary sample), gut contents analysis was restricted to gizzard analyses. Gizzard contents consisted mainly of shell fragments; therefore it was not possible to collect quantitative information on the biomass and relative proportions of different food items. Consequently, each food item was simply identified to species level and the proportion of birds feeding on each food item (% occurrence) calculated. After retrieval of Common Scoters killed during the Sea Empress oil spill were stored at the National Museum of Wales and catalogued in terms of date and location of recovery, rehabilitation status (i.e. whether or not birds had been supplied from bird hospitals), and condition of corpse (Howlett 1996). Birds transported to WWT Slimbridge where every specimen was further categorised in terms of the degree of oiling suffered, physical condition, sex and age. The level of oiling was scored from 0 to 4. The amount of fat reserves present was ascertained by dissection and scored from 0 to 4. During the biometrics and moult study, the oesophagus, proventriculus and gizzard of each bird were removed and immediately frozen at -20 degrees C. Gut contents were extracted for analysis at a later date. As the proportion of Common Scoters with food in the oesophagus or proventriculus was very low ( less than 1% in the preliminary sample), gut contents analysis was restricted to gizzard analyses. Gizzard contents consisted mainly of shell fragments; therefore it was not possible to collect quantitative information on the biomass and relative proportions of different food items. Consequently, each food item was simply identified to species level and the proportion of birds feeding on each food item (% occurrence) calculated.