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Marine Mammal & Marine Turtle Strandings www.strandings.com Marine Mammal & Marine Turtle Strandings (Welsh Coast) Annual Report 2006 R.S.Penrose. February 2007 Marine Environmental Monitoring Penwalk Llechryd Cardigan Ceredigion West Wales SA43 2PS e-mail: [email protected] 1 REPORT DISTRIBUTION. British Divers Marine Life Rescue. J. Barnett P. Lewis Carmarthen Bay & Estuaries European Marine Site. B. Bullimore Centre for Environment, Fisheries & Aquaculture Science. R. J. Law Countryside Council for Wales. Dr A. McMath T. Stringell R. Pratt Dyfed Powys Police (Wildlife Unit) A. Mason Environment Agency. K. Cameron Local Authorities. Anglesey G. Loe Bridgend S. Moon Cardiff P. Gillard Carmarthenshire E. Waters Ceredigion B. Jones Conwy T. Mead Denbighshire M. Bud Flintshire R. Hebdon Gwynedd B. Davies Neath Port Talbot Y. Edwards Pembrokeshire A. Woods Swansea C. Morgan Vale of Glamorgan K. Pryor Marine Aware North Wales. Nia Jones Maritime & Coastguard Agency. Swansea E. Birkett Milford Haven A. Turnbull Holyhead J. Paton Natural History Museum. Dr R. Bamber R. Sabin E. Evans Pembrokeshire Coast National Park. J. Hodges RSPCA L. Sadler R. de Kerckhove Snowdonia National Park Authority. R. Gritten SAC Officers. Ceredigion A. Bianchessi Pembrokeshire S. Burton Pen Llyn A. Hargrave The Wildlife Trusts. F. Catternach Dr M. Havard 2 University College Cork. Dr E. Rogan University of Liverpool. Dr J.R. Baker Dr J. Chantry Welsh Assembly Government. Dr H. Prosser V. Paris J. Thomas Welsh Marine Life Rescue. T. Leadbetter Zoological Society of London. Dr P. Jepson R. Deaville Others : Jemma & Ray Lerwill Nia Jones Sal Shipley 3 CONTENTS Page 1 EXECUTIVE SUMMARY 6 2 INTRODUCTION 8 2.1 Changes to Project 2006 8 3 MATERIALS AND METHODS 9 3.1 Live Animals. 9 3.2 Dead Animals. 9 4 RESULTS 10 4.1 Marine Mammals. 10 4.2 Bottlenose Dolphin Attacks. 14 4.3 Unusual Occurrences. 14 4.4 Live Strandings. 18 4.5 Tagging. 19 5 OTHER MARINE ANIMALS REPORTED TO THE NETWORK 20 5.1 Marine Turtles. 20 5.2 Sharks. 22 6 SAMPLES 22 7 FUNDING 22 8 PUBLICITY 22 9 TRAINING 23 10 EQUIPMENT 24 11 TRAVEL 24 12 ADMINISTRATION 24 13 CAUSE OF DEATH 24 14 LIST OF SCIENTIFIC NAMES USED IN THIS REPORT 25 15 ACKNOWLEDGEMENTS 26 16 APPENDICES 26 4 List of Figures. page Figure 1. Reported harbour porpoise strandings on the Welsh coast. 12 Figure 2. Harbour porpoise strandings by month. 12 Figure 3. Reported grey seal mortality on the Welsh coast. 13 Figure 4. Grey seal mortality by month. 13 Figure 5. Stranding locations of the 8 porpoises killed by bottlenose dolphins in 2006. 14 List of Plates. Plate 1. Tag returned from the Firth of Clyde turned out to be a hoax. 14 Plate 2. The Thames whale SW2006/40 passing the Houses of Parliament. 15 Plate 3. Northern bottlenose whale SW2006/40 at Denton Wharf, Gravesend. 15 Plate 4. SW2006/67 & SW2006/68 Two bycaught porpoises at Swansea. 16 Plate 5. On examination SW2006/68 was also found to be pregnant with a 39cm male foetus. 16 Plate 6. Bottlenose dolphin SW2006/98 being loaded onto the trailer with the assistance of Gwynedd Maritime Services at Black Rock Sands. 16 Plate 7. Bottlenose dolphin SW2006/201 at Harlech. 17 Plate 8. Bottlenose dolphin SW2006/225a at Porth Cwyfan. 17 Plate 9. MRI Scans of the porpoise head SW2006/240. 18 Plate 10. Current tags supplied to groups on the Welsh coast. 19 Plate 11. T1977/02 recovered near Abersoch, December 1977. 20 Plate 12. T1977/02 emerging from fish-store in Plymouth 2006. 20 Plate 13. Injury to head was shown to be there in 1977. 20 Plate 14. Country Park Ranger Wyn Parry with loggerhead turtle T2006/39 ‘Pembrey’. 21 Plate 15. T2006/44 awaiting post-mortem examination. 21 Plate 16. Fragments of plastic (on blue paper) removed from the stomach of T2006/44. 21 Plate 17. The porbeagle shark found on Black Rock Sands. 22 Plate 18. CCS team ‘kegging’ an entangled northern right whale. 23 Plate 19. CCS team cutting trailing gear from a humpback whale. 23 List of Tables. Table 1. 2006 Total number of reported marine mammal strandings (Welsh Coast). 10 Table 2. 2006 Number of live cetacean strandings (Welsh Coast). 10 Table 3. 2006 Number of animals suitable for post-mortem examination. 11 Table 4. 2006 Number of animals decomposed / disposed of. (Welsh Coast). 11 Table 5. Cause of death. 25 Table 6. List of scientific names used in this report. 25 5 1. CRYNODEB GWEITHREDOL Yn 2006, mewn adolygiad o brosiect tiriadau mamaliaid môr, lleihawyd yn sylweddol y cymorth ariannol a roddai Defra i Gymdeithas Sŵolegol Llundain/y Sefydliad Sŵoleg (ZSL/IoZ), i'r Amgueddfa Hanes Naturiol (NHM) ac i Goleg Amaethyddol yr Alban (SAC). Yn ffodus, fe barhaodd Llywodraeth y Cynulliad a'r Cyngor Cefn Gwlad i ariannu Marine Environmental Monitoring (sef rhaglen fonitro amgylcheddol morol) ar yr un lefelau ag o'r blaen. Er hynny mae'r lleihad yn y costau teithio a gefnogir gan Defra trwy ZSL/IoZ wedi effeithio ymhellach yng Nghymru, gyda'r canlyniad nad eir at garcasau a dod â hwy'n ôl ar gyfer archwiliad post-mortem oni wyddys eu bod yn rhai 'diweddar'. Mewn ymdrech i weithredu y tu mewn i'r gyllideb teithio is, prynwyd dwy rewgell a newidiwyd y gweithdrefnau er mwyn medru storio carcasau a pheidio â'u trosglwyddo i Lundain neu Lerpwl mor aml. Er hynny, mae rhewi carcasau'n golygu colli rhywfaint o'r wybodaeth a geir yn ystod y broses archwilio post-mortem. Derbyniodd Marine Environmental Monitoring adroddiadau am 131 o anifeiliaid o deulu'r morfil, gan gynnwys tri llamhidydd byw a oedd wedi tirio, a 71 o forloi. Dychwelwyd dau o'r rhain i'r môr a bu farw un ar y traeth. Llamhidyddion oedd y rhai y cafwyd y nifer uchaf o adroddiadau amdanynt, a'r niferoedd yr un fath â llynedd. Cafwyd adroddiadau am bedwar dolffin trwyn potel, ond un yn unig oedd mewn cyflwr addas i'w archwilio post-mortem. Cafwyd bod 31 o forfilod (23.6%) mewn cyflwr addas i'w harchwilio post-mortem, a throsglwyddwyd 27 i'w harchwilio. Soniwyd wrth yr awdurdod lleol perthnasol am 135 o famaliaid morol, er mwyn cael gwared â'r gweddillion yn ddiogel unwaith y cadarnhawyd y manylion adnabod, ac nid oedd modd casglu 38 ohonynt. Nid oedd cymaint ag yn 2005 o lamhidyddion y gellid cadarnhau iddynt gael eu lladd gan ddolffiniaid trwyn potel. Er hynny ni chasglwyd pob carcas oherwydd y toriadau ariannol, a gall y nifer gwirioneddol fod yn uwch na'r nifer a gofnodwyd. Ni chasglodd Marine Environmental Monitoring yr un morlo ar gyfer archwiliad post-mortem. Er hynny, casglwyd un sbesimen gan Adran Anatomeg a Bioleg Celloedd, Prifysgol Lerpwl ar gyfer sgan MRI. Hefyd, fe sganiwyd SW2006/240, llamhidydd newydd-anedig, newydd farw, cyn yr archwiliad post-mortem. Helpodd Marine Environmental Monitoring yn yr ymgyrch i achub yr enwog forfil trwyn potel o'r Dafwys ac yn yr archwiliad post-mortem a ddilynodd. Achubodd Marine Environmental Monitoring grwban môr pendew mawr, T2006/39, yn fyw o Barc Gwledig Penbre, Sir Gaerfyrddin, a'i ddanfon i'r cyfleuster adfer ym mharc bywyd môr Weymouth. Casglodd Marine Environmental Monitoring sbesimen llai, T2006/44, a oedd newydd farw, a'i ddanfon i ZSL ar gyfer archwiliad post-mortem. Cafwyd ei fod wedi marw o newyn/hypothermia. Casglodd Marine Environmental Monitoring grwban môr cefn lledr rhewedig, T1977/02, o Plymouth a'i ddanfon i Ysgol Milfeddygaeth Prifysgol Bryste ar gyfer awtopsi hwyr. 6 1. EXECUTIVE SUMMARY During a Strandings Project review in 2006, funding by Defra to ZSL/IoZ, NHM and SAC was significantly reduced. Funding to Marine Environmental Monitoring by the WAG and the CCW fortunately remained at previous levels, however reduced travelling expenses supported by Defra via ZSL/IoZ had a knock-on effect in Wales resulting in only known ‘fresh’ carcasses being attended and recovered for post-mortem examination. In an attempt to operate within the reduced travelling budget two freezers have been purchased and procedures changed enabling storage of carcasses and fewer deliveries to London or Liverpool. However freezing does result in the loss of some information during the post-mortem examination process. 131 cetaceans and 71 seals were reported to Marine Environmental Monitoring including 3 live stranded harbour porpoises. Two were returned to the sea and one expired on the beach. Harbour porpoises were the most frequently reported cetacean with numbers level with the previous year. 4 bottlenose dolphins were reported but only one was in a suitable condition for post-mortem examination. 31 cetaceans (23.6%) were found to be in a suitable condition for post-mortem examination, 27 were delivered for examination. 135 marine mammals were reported to the relevant local authority for safe disposal once identification details were confirmed and 38 were irretrievable. The number of harbour porpoises identified as being killed by bottlenose dolphin was lower than in 2005. However, not all carcasses were retrieved due to cut backs and the final number may have been higher than recorded. No seals were retrieved by Marine Environmental Monitoring for post-mortem examination. However one specimen was collected for MRI scan by the Department of Anatomy and Cell Biology, Liverpool. SW2006/240, a fresh harbour porpoise neonate was also scanned before the post-mortem examination was carried out. Marine Environmental Monitoring assisted with the retrieval operation and subsequent post-mortem examination of the northern bottlenose ‘Thames Whale’. A large live loggerhead turtle, T2006/39 was recovered by Marine Environmental Monitoring from Pembrey Country Park, Carmarthenshire and delivered to Weymouth Sea Life rehabilitation facility. A smaller specimen, T2006/44, freshly dead was collected by Marine Environmental Monitoring and delivered to ZSL for post-mortem examination.
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