Risso's Dolphin

What is it: 

Risso's dolphin is a large, robust dolphin around 3.5m in length, with a blunt, rounded head, and a slight melon but no beak. It is distinctively greyish in colour (whitening with age), often with numerous white scars on the flanks.

There are two groups of layers included

  1. Statistical approaches to aid identification of Marine Protected Areas for Risso's dolphin. Based on SNH Commissioned Report No. 594, these include
    • Observed adjusted densities of Risso's dolphin; and
    • Modelled persistence of above mean density of Risso's dolphin (summers 1994-2012)
  2. Risso's dolphin effort related sightings displays
    • Annual Hebridean Whale and Dolphin Trust Effort Related Sightings Data (2003-2011)
    • Annual and Monthly distribution and relative abundance (1979-1997)
    • Whale and Dolphin Conservation Effort related sightings data for Risso's dolphin (animals per kilometre) 2010 - 2017
Links to Scotland's Marine Atlas: 
This information page is part of the theme: 

Links and Resources

Map Typesort descending Click title for metadata and licence information Date of data View Map
Map Layers (NMPi) July - Monthly distribution and relative abundance of Risso's dolphin (1979 -1997) 1979-01-01 to 1997-12-31 Access this map on NMPi
Map Layers (NMPi) May - Monthly distribution and relative abundance of Risso's dolphin (1979 -1997) 1979-01-01 to 1997-12-31 Access this map on NMPi
Map Layers (NMPi) November - Monthly distribution and relative abundance of Risso's dolphin (1979 -1997) 1979-01-01 to 1997-12-31 Access this map on NMPi
Map Layers (NMPi) Whale and Dolphin Conservation Effort related sightings data for Risso's dolphin (animals per kilometre) 2010 - 2017 Access this map on NMPi
Map Layers (NMPi) Annual Hebridean Whale and Dolphin Trust Effort Related Sightings data for Risso's dolphin (2003 - 2011) Access this map on NMPi
Map Layers (NMPi) August - Monthly distribution and relative abundance of Risso's dolphin (1979 -1997) 1979-01-01 to 1997-12-31 Access this map on NMPi
Map Layers (NMPi) Observed adjusted densities of Risso's dolphin (all seasons 1994 - 2012) 1994-01-01 to 2012-12-31 Access this map on NMPi
Map Layers (NMPi) September - Monthly distribution and relative abundance of Risso's dolphin (1979 -1997) 1979-01-01 to 1997-12-31 Access this map on NMPi
Map Layers (NMPi) April - Monthly distribution and relative abundance of Risso's dolphin (1979 -1997) 1979-01-01 to 1997-12-31 Access this map on NMPi
Map Layers (NMPi) February - Monthly distribution and relative abundance of Risso's dolphin (1979 -1997) 1979-01-01 to 1997-12-31 Access this map on NMPi
Map Layers (NMPi) June - Monthly distribution and relative abundance of Risso's dolphin (1979 -1997) 1979-01-01 to 1997-12-31 Access this map on NMPi
Map Layers (NMPi) March - Monthly distribution and relative abundance of Risso's dolphin (1979 -1997) 1979-01-01 to 1997-12-31 Access this map on NMPi
Map Layers (NMPi) October - Monthly distribution and relative abundance of Risso's dolphin (1979 -1997) 1979-01-01 to 1997-12-31 Access this map on NMPi
Map Layers (NMPi) Observed adjusted densities of Risso's dolphin (all seasons 1994 - 2012) (mapped as graduated symbols) 1994-01-01 to 2012-12-31 Access this map on NMPi
Map Layers (NMPi) Modelled persistence of above mean density of Risso's dolphin (summers 1994 - 2012) 1994-01-01 to 2012-12-31 Access this map on NMPi
Map Layers (NMPi) January - Monthly distribution and relative abundance of Risso's dolphin (1979 -1997) 1979-01-01 to 1997-12-31 Access this map on NMPi
Map Layers (NMPi) December - Monthly distribution and relative abundance of Risso's dolphin (1979 -1997) 1979-01-01 to 1997-12-31 Access this map on NMPi
Map Layers (NMPi) Annual distribution and relative abundance of Risso's dolphin (1979 - 1997) Access this map on NMPi