IMIS

The records in this dataset originate from the observations of Sea Trust volunteers from the Stena Europe Ferry operating between Fishguard (Wales) and Rosslare (Eire). Geographical coverage comprises a 112 km transect of the St George's Channel between the Welsh mainland at 52 00 65 N, 04 59 11 W decimal, and the Irish mainland at 52 15 35 N, 06 20 26 W decimal. Each survey represents a transect between the two locations and cetacean species records are captured with latitude/longitude, date, time, numbers, adult/juvenile, sea state and other attributes from crossing the Irish Sea twice in daylight with two night time crossings in between. Surveys are carried out on a monthly basis (minimum one per month) and observers are equipped with high quality binoculars and/or a telescope, and are accompanied by at least one experienced observer on board. The bridge of the ship is the observation point, a standard recording sheet is used, and surveys are targeted for favourable weather conditions (Sea State Favourable 0-3) as sightings drop off considerably above this. The systematic methodology employed has been guided by marine scientists. Five species have been sighted: Harbour Porpoise, Bottlenose Dolphin, Common Dolphin, Risso's Dolphin and Fin Whale. Of 330 surveys, only 28 yielded no sightings of cetaceans.