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