2017 Marine Mammal Strandings Annual Report
Total Page:16
File Type:pdf, Size:1020Kb
www.strandings.com Marine Mammal & Marine Turtle Strandings (Welsh Coast) Annual Report 2017 R.S.Penrose. May 2018 Marine Environmental Monitoring Penwalk Llechryd Cardigan Ceredigion West Wales SA43 2PS e-mail: [email protected] 1 CONTENTS Page 1 CRYNODEB GWEITHREDOL 4 EXECUTIVE SUMMARY 5 2 INTRODUCTION 6 3 MATERIALS AND METHODS 6 3.1 Live Animals. 7 3.2 Dead Animals. 7 4 RESULTS 8 4.1 Marine Mammals. 8 4.2 Bottlenose Dolphin Attacks. 13 4.3 Unusual Occurrences. 14 4.4 Live Strandings. 16 4.5 Tagging. 17 5 OTHER MARINE ANIMALS REPORTED TO THE NETWORK 17 5.1 Fish . 17 5.2 Seals. 19 5.3 Sharks. 19 5.4 Marine Turtles. 19 6 SAMPLES 21 7 FUNDING 21 8 PUBLICITY 21 9 LEGISLATION 21 10 EQUIPMENT 21 11 TRAVEL 22 12 ADMINISTRATION 22 13 CAUSE OF DEATH 22 14 LIST OF SCIENTIFIC NAMES USED IN THIS REPORT 23 15 ACKNOWLEDGEMENTS 23 16 APPENDICES 23 2 List of Figures. page Figure 1. Current Technical Co-ordination of the Cetacean Strandings Investigation Programme (CSIP). 6 Figure 2. Reported bottlenose dolphin strandings on the Welsh coast. 10 Figure 3. Bottlenose dolphin strandings by month. 10 Figure 4. Bottlenose dolphin strandings averaged over 1990 to 2017. 10 Figure 5. Reported harbour porpoise strandings on the Welsh coast. 11 Figure 6. Harbour porpoise strandings by month. 11 Figure 7. Harbour porpoise strandings averaged over 1990 to 2017. 11 Figure 8. Reported grey seal mortality on the Welsh coast. 12 Figure 9. Grey seal mortality by month. 12 Figure 10. Grey seal reports averaged over 1990 to 2017. 12 Figure 11. Stranding locations of the three porpoises, recovered to the project, killed by bottlenose dolphins in 2017. 13 List of Plates. Plate 1. Harbour porpoise SW2017/251 at Pembrey. 14 Plate 2. Minke whale SW2017/283 at Oxwich Bay, Swansea. 14 Plate 3. Bottlenose dolphin SW2017/512 at Barmouth. 15 Plate 4. SW2017/384 and SW2017/385. 15 Plate 5. SW2017/550 15 Plate 6. SW2017/558 16 Plate 7. The blue marlin from Freshwater East, being moved to its display tank. 18 Plate 8. The blue marlin in its display tank in bay 2 of the Hintze Hall. 18 Plate 9. Olive ridley turtle T2016/030 at Anglesey Sea Zoo prior to flight. 20 List of Tables. Table 1. 2017 Total number of reported marine mammal strandings (Welsh Coast). 8 Table 2. 2017 Number of live cetacean strandings (Welsh Coast). 8 Table 3. 2017 Number of animals selected for post-mortem examination. 9 Table 4. Cause of death (Cetaceans). 22 Table 5. List of scientific names used in this report. 23 3 1. CRYNODEB GWEITHREDOL Caiff yr UK Cetacean Strandings Investigation Programme (CSIP - rhaglen y DU ar gyfer ymchwilio tiriadau anifeiliaid o deulu'r morfilod) ei gydlynu’n dechnegol gan Gymdeithas Söolegol Llundain (ZSL). Teulu’r Morfilod: Derbyniodd Marine Environmental Monitoring (MEM) adroddiadau am 148 o anifeiliaid o deulu'r morfil yn 2017. O’r rhain, llamidyddion (114 ohonynt) a grybwyllwyd amlaf. Cafwyd adroddiadau ynghylch anifeiliaid eraill o deulu'r morfilod wedi tirio ar lannau Cymru yn 2017, gan gynnwys un dolffin trwyn potel, 23 dolffin cyffredin, tri dolffin amhenodol rhesog/cyffredin; tri o rywogaeth amhenodol; un morfil pengrwn; un dolffin Risso a dau forfil pigfain. Daeth un llamhidydd, dau ddolffin cyffredin ac un morfil pengrwn i'r lan yn fyw. Cafodd pob un o'r pedwar ei ail-lansio gan aelodau'r cyhoedd. Daeth un dolffin cyffredin i'r lan eto a marw, a chafwyd y morfil pengrwn yn farw'r drannoeth. Dewiswyd wyth ar hugain o greaduriaid i’w harchwilio: ugain llamhidydd; chwe dolffin cyffredin; un morfil pigfain a dolffin Risso. Cafwyd tri llamhidydd yn 2017 ‘wedi’u lladd gan ddolffin trwyn potel’. Gorfu i’r cynllun wneud llai o gofnodi ers 2006 a gwnaeth hyn hi’n anodd cymharu tueddiadau yn y gweithgaredd hwn â rhai'r blynyddoedd cynt. Samplau: Yn ogystal â'r samplau arferol a gymerwyd o anifeiliaid a gasglwyd ar gyfer archwiliad post-mortem, cymerwyd samplau hefyd o ddolffin trwyn potel. Morloi: Derbyniodd MEM adroddiadau am 172 morlo llwyd marw. Crwbanod: Derbyniodd MEM adroddiadau am bum crwban marw wedi tirio, pob un yn grwban môr cefn lledr. Cafwyd dau adroddiad o weld crwban môr cefn lledr byw. Heulforgwn: Ni chafwyd unrhyw adroddiad yn ystod 2017 am heulforgi’n tirio. Ariannu: Dyfarnodd Llywodraeth Cymru/Defra gytundeb newydd ar y 16eg Hydref 2017, i fod mewn grym hyd y 15fed Hydref 2020. 4 1. EXECUTIVE SUMMARY The UK Cetacean Strandings Investigation Programme (CSIP) is under the technical co-ordination of the Zoological Society of London (ZSL). Cetaceans: One hundred and forty-eight cetaceans were reported to Marine Environmental Monitoring in 2017. Harbour porpoise (n=114) was the most frequently reported cetacean. Other cetaceans reported stranded on the Welsh coast in 2017 included one bottlenose dolphin; 23 common dolphins; three common/striped dolphins indeterminate; three sp. indeterminate; one pilot whale; one Risso’s dolphin and two minke whales. One harbour porpoise and two common dolphins and a long-finned pilot whale live-stranded. All four animals were re-floated by the public. One common dolphin re-stranded and died and the pilot whale was found dead the next day. Twenty-eight cetaceans were collected for examination: twenty harbour porpoises; six common dolphins; one minke whale and a Risso’s dolphin. Three harbour porpoises ‘killed by bottlenose dolphin’ were identified in 2017. Imposed reduced effort in recording from 2006 has made trends in this activity difficult to compare with previous years. Samples: In addition to routine samples taken from animals recovered for post-mortem examination, samples have also been taken from a bottlenose dolphin. Seals: One hundred and seventy-two dead Atlantic grey seals were reported to MEM. Turtles: Five dead stranded turtles were reported to MEM, all leatherback turtles. Reports of two live leatherback turtle ‘sightings’ were received. Basking sharks: No basking shark strandings were reported during 2017. Funding: A new contract was awarded on the 16th October 2017 by Defra/Welsh Government to run until the 15th October 2020. 5 2. INTRODUCTION In 1990, the ‘Collaborative UK Marine Mammal Strandings Project’ was initiated and part-funded by the UK Department of the Environment (now Defra). The project involves detailed pathological and other investigations of stranded marine mammal carcasses (mostly cetacean) from UK waters. It forms part of the Department's international obligations towards conservation agreements, including the "Agreement on the Conservation of Small Cetaceans in the Baltic, North East Atlantic, Irish and North Seas" (ASCOBANS). Detailed pathological investigations of stranded marine turtles were included in 2001 and basking sharks in 2007. The project is now named the ‘Cetacean Strandings Investigation Programme’ (CSIP) (see Figure 1.). Figure 1. Current technical co-ordination of the Cetacean Strandings Investigation Programme (CSIP). Funding to ZSL/IoZ, NHM and SAC was significantly reduced through 2006/2007. Funding to MEM by the Welsh Government and the Countryside Council for Wales fortunately remained at previous levels, however reduced travelling expenses supported by Defra via ZSL/IoZ has had a knock-on effect in Wales resulting in only known ‘fresh to moderate’ carcasses that can be successfully recovered for post-mortem examination being attended. Confirmation of species of other cetacean strandings has relied on digital photographs and known reliable sources. Where animals cannot be identified 100 per cent, the Strandings Co-ordinator has attended at his own expense if within a reasonable distance. Carcasses with unconfirmed species identification generally outside this area have been entered into the database as ‘cetacean species indeterminate’. In an attempt to operate within the reduced travelling budget two chest freezers were purchased and procedures now changed to freeze carcasses. Although this practice results in loss of some information during the post-mortem examination process, carcasses can now be ‘stock-piled’ and transported to London in larger numbers thus reducing the number of journeys per year. 3. MATERIALS AND METHODS A single contact number for the whole of the UK has been maintained. The UK number is a free- phone number 0800 6520333 and a stepped menu system takes the caller through whether the stranding is alive or dead and directs them to the correct organisation and the correct strandings co- ordinator for the appropriate country. A network of volunteers, rangers, wardens, coastal officers, Harbour Masters etc. has been maintained who can be contacted by the Strandings Co-ordinator to confirm the stranding, assess its condition and 6 secure the animal from the effects of the tide, predation etc. until it can be dealt with. In recent years the use of digital cameras has vastly improved the quality of reporting as species, sex, and condition of carcass can be ascertained from the e-mailed image. A dedicated email address to receive digital photographs has been created [email protected] It is hoped this will reduce the number of ‘cetacean species indeterminate’ recorded in the database. The following criteria are applied: - 3.1 Live Animals (Condition code 1)1 In 1994 the Marine Animal Rescue Coalition (MARC) was formed. This consists of all the major animal welfare and conservation bodies involved with marine mammals in the UK. It has been agreed that in the case of a live stranding the first point of call would be the RSPCA as they support a manned 24-hour emergency phone. The RSPCA would then contact the relevant organisations, Marine Environmental Monitoring etc. 3.2 Dead Animals (Condition code 2a extremely fresh as if just died) 1 (Condition code 2b slight decomposition)1 (Condition code 3 moderate decomposition)1 The animal is retrieved using a 4-wheel drive vehicle and trailer.