My activity

  • Profile picture of John Bell who took this action.

    John Bell commented on "Description":

    The haplotype found in Scotland (the larger black form mentioned above) was found to be different from the haplotype found in England/Wales (a smaller brown form). These two forms arose from two separate recolonisations after the end of glaciation - the Scottish haplotype from an Iberian refugium and the English from an Eastern European refugium. Ref: PIERTNEY, S. B., STEWART, W. A., LAMBIN, X., TELFER, S., AARS, J. and DALLAS, J. F. (2005), Phylogeographic structure and postglacial evolutionary history of water voles (Arvicola terrestris) in the United Kingdom. Molecular Ecology, 14: 1435–1444. doi: 10.1111/j.1365-294X.2005.02496.x

    over 3 years ago

  • Profile picture of John Bell who took this action.

    John Bell commented on "Arvicola terrestris (Linnaeus, 1758)":

    This species has been renamed Arvicola amphibius.

    over 3 years ago

  • Profile picture of John Bell who took this action.

    John Bell commented on "Range":

    The actual figure for habitat loss (from 1900) stated in the 1989-90 survey is 67.7%, and the figures for habitat loss (from the previous study) in the 1996-1998 study are 69.62% (baseline only) or 67.49% (baseline and historical). This would give total loss from 1900 until the 1996-1998 study of 90.2% or 89.6%.

    almost 5 years ago

  • Profile picture of John Bell who took this action.

    John Bell commented on "Range":

    The claim above that the 1996-98 survey showed a loss of 94% of sites is incorrect. This figure of 94% is from the earlier 1989-90 study by Jefferies and Strachan, and is an extrapolated figure - "Thus, we could eventually have a total loss of 94% of occupied sites this century and an even greater reduction in actual numbers." The actual loss reported in the study, since 1900, is 67.7%, although it may be as high as 77.2%. See Jefferies and Strachan, "The Water Vole Arvicola terrestris in Britain 1989-1990: Its distribution and changing Status", The Vincent Wildlife Trust, ISBN:0-946081-23-9

    almost 5 years ago