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.”
What a wonderful experience we had on this most enjoyable cruise. Everything was so well organised from the initial contact and information give by Emma, the greeting by the crew, and throughout the six night cruise, we could not have been better looked after. Every aspect of the week was meticulously organised and we could not have asked for more. Although on some days the light wasn't perfect for photography - my main interest - the skipper, Chris, anticipated the best day to visit what was perhaps the highlight of the week, an afternoon on Lunga, where we saw sea birds by the thousands and especially puffins. This and all the other visits ashore, were greatly enhanced by Alexa, our wildlife guide who made the week so much more enjoyable and a great learning experience. Having a slight walking disability, I was particularly grateful for the additional attention and assistance I had, . On board, we were looked after exceptionally well by Mags, our wonderful chef who made certain we were well fed - the food was perfect every day - and by Craig, the bosun who kept everything running smoothly from the catering aspect to the everyday day tasks around the vessel. There were eight guests on board and we all had the same complaint, 6 nights went by far too quickly.
Derek and Sue Prescott: 27 April 2019Idyllic Islands: Mull, Iona, Staffa & the Treshnish Isles