Conservation charity the Hebridean Whale and Dolphin Trust said that from its research yacht Silurian, which was used in the BBC TV programme Blue Planet, volunteers and scientists spotted 2,303 common dolphins, 42 bottlenose dolphins and 94 Risso’s dolphins in its 2016 expeditions.
Trust director Alison Lomax said: “The impressive range of species documented in our at-sea surveys last year is a powerful reminder that Scotland’s west coast ocean environment is home to remarkable marine life.
The figures for all three species are the highest recorded in the charity’s annual surveys.
Average annual figures over the last 14 years recorded 463 individual common dolphins, 14 bottlenose dolphins and 12 Risso’s dolphins. For common dolphins, records range from zero in earlier field seasons to 1,862 during 2007.
Dr Lauren Hartny-Mills, science officer at the trust, said: “The reasons for the high number of sightings of these charismatic dolphin species and the broader effects on the marine environment and other species remain unclear.
“But the intriguing findings highlight the importance of ongoing monitoring and research to strengthen our understanding of what is taking place in Hebridean waters and to ensure well-informed conservation action.”
The latest findings came during a research season lasting from May to October, as part of the trust’s citizen science project monitoring whales, dolphins and porpoises – collectively known as cetaceans – and basking sharks in the area.
Last year saw 71 volunteers work with marine scientists on visual surveys and acoustic monitoring with underwater microphones or hydrophones, and identifying individual cetaceans through photography.
The charity, based on the Isle of Mull, now holds data from a surveyed area measuring more than 95,000km.
It aims to pass the 100,000km milestone during 2017 and recruits volunteers to work for two-week periods between April and September.
“Long-term scientific studies of this globally-important habitat and its inhabitants are crucial if we are to ensure a secure future for the Hebrides’ spectacular cetaceans.”
We were so glad that we decided to join a wildlife cruise with your company. Not only did we sail in extreme comfort and luxury aboard the 'Lucy Mary' but we did it with a lovely group of fellow travellers who proved great company throughout, sharing stories and experiences in a very convivial manner. All the crew members were friendly, knowledgable and approachable in every aspect of their respective duties. The anchorages, scenery and on-shore trips were excellent with the weather playing its part too. A wide range of wildlife was spotted in the water and in the air but a highlight had to have been the feeding frenzy witnessed one very calm, surreal day when the sea literally erupted around the ship with dozens of dolphins, minke whales and gannets to name but a few...truly outstanding. Numerous photographs and videos were taken and will provide a fantastic record of our adventure at sea. Each evening it was a pleasure to be seated at the beautifully dressed table and anticipate the next gourmet meal accompanied by the obligatory, excellent house wine! This was our first cruising holiday but it will certainly not be our last. Thank you to everyone who helped make it such a special trip which exceeded our expectations in every way. The 'icing on the cake' had to be the appearance of the Northern Lights on our last night aboard – a magical finale to a wonderful holiday. We absolutely loved every minute aboard this beautiful ship .
Steven and Norma Holiday: 7 September 2023Skye and the Small Isles: Hebridean horizons