Marine Mammals - Risso's Dolphins

The number of individuals of Risso's Dolphins sighted per unit time of observation, resolved into 1/4 International Council for the Exploration of the Sea (ICES) rectangles (15' latitude x 30' longitude). The Joint Cetacean Database (JCD) comprises of the most comprehensive information on the distribution of cetaceans in north-west European waters and this data contains the most complete quantitative description of Risso's Dolphins dispersion in this region. Reid, J B, Evans, P G H, and Northridge, S P (2003) Atlas of Cetacean distribution in north-west European waters. Joint Nature Conservation Committee, Peterborough.