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Dune race animals |
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AGILIS
Senior Member Joined: 27 Feb 2007 Location: United Kingdom Status: Offline Points: 1689 |
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are there any nuclear power stations in the area Keith
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LOCAL ICYNICAL CELTIC ECO WARRIOR AND FAILED DRUID
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liamrussell
Senior Member Joined: 13 Jan 2005 Status: Offline Points: 100 |
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Unfortunately I couldn't calibrate the images, as the standard way to do this is to include a white disc in the photo. I just took the photos so I could recognise individual lizards if I recaught them. However the photos were taken under reasonably consistent conditions and other studies using the sane techniques did not require any adjustment as there was so little difference in intensity between the images. I think the digital images vary a lot less than using film as there is no room for difference due to the development process. It's no a perfect situation but I thought interesting given what I had to work with.
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Caleb
Senior Member Joined: 11 Apr 2011 Status: Offline Points: 660 |
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Fair enough.
Did you consider converting the RGB colour values to HSV (hue/saturation/value)? That might quantify the differences in a more intuitive way- e.g. changes in darkness/lightness would change S and V, but the underlying 'greenness' should only show up in H.
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AGILIS
Senior Member Joined: 27 Feb 2007 Location: United Kingdom Status: Offline Points: 1689 |
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What we all seem to forget is its great that LA are found in surrounds other the the South west of England I can remember having a look for them when I was serving in the RAF in the early sixties in the sand dunes around the Altcar area but sadly I only see a few lv Peter are there any colonies in the area KEITH
Edited by AGILIS - 14 Jul 2014 at 6:14pm |
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LOCAL ICYNICAL CELTIC ECO WARRIOR AND FAILED DRUID
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Peter
Senior Member Joined: 17 Jan 2008 Location: United Kingdom Status: Offline Points: 310 |
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Hi Keith :) I only know of the Sefton coast colonies and the Welsh reintroductions. The furthest North colony of La that I know of is an introduced colony on a specific Hebridean island that has been surviving for approximately ten generations but in this instance the animals are of heathland origin and so far are showing little or no sign of developing the features typically associated with dune race animals.
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BLF Dragonscapes Habitats officer
Amphibian and Reptile Conservation e: peter.hill@arc-trust.org |
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Peter
Senior Member Joined: 17 Jan 2008 Location: United Kingdom Status: Offline Points: 310 |
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Keith, there are almost certainly La at the rifle ranges in Altcar, but access is difficult. There was pretty severe damage to the population at Formby last year due to a big fire, so Altcar could potentially hold animals that could recolonize, but there is very little free sand at Altcar due to creeping willow and other vegetation taking hold.
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BLF Dragonscapes Habitats officer
Amphibian and Reptile Conservation e: peter.hill@arc-trust.org |
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