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Snakes, Coroline, onduline and I

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Mark_b View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark_b Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jan 2011 at 9:31pm

Originally posted by Scale Scale wrote:

Why no Slow-worm's mark, any theories? What's the habitat like? Their absence must be unusual for a site supporting the 3 other species, no?

I have no idea why there are no slow-worms at this site. Maybe they never migrated there or couldn't migrate there?

The habitat is heathland in south Wales

Originally posted by herpetologic2 herpetologic2 wrote:

Also the ACO density is massive yet you have very low numbers of animals?

Yea I was hoping for a lot more animals but they didn't turn up. There were large numbers of grass snakes found through visual encounter survey only 400m away.

It has already been discussed in this thread the importance of refugia placement and by using Reading's method I have to put a particular array in a particular place thus many of the refugia are not in what I class as a prime location. That may well be one of the issues but I couldn't test my theories without constructing the experiment this way. I hope to have some interesting results once I have analysed my data, which I shall post asap.

 

Where do you guys buy metal sheets from out of interest?

How many consultancies do visual encounter surveys as well as refugia surveys (when determining presence and when catching reptiles) ?

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Matt Harris View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Matt Harris Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2011 at 10:35am
Originally posted by herpetologic2 herpetologic2 wrote:


I know a well known former employee of HCT who is now 3
years into his consultancy work who is advocating using
smaller pieces of felt - less than 0.25m2!!!





Relating to Gemma's post about cardoors and saucepans, I guess we've all seen the 'common' species under just about every object you can think of, from discarded porno mags to fallen gravesones to chucked-out fridges, but going back to ACO's there's a difference between a herp conceivably using an ACO as a one-off, and that ACO being efficient enough at attracting herps to allow a population estimate, site clearance, or even detecting presence/absence on sites with low densities.

0.25m2 roofing felt may be fine for lizards on Dorset heaths, but I wonder how well they would pick up grass snakes and adders in marginal habitats?
Local Authority Ecologist
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Noodles View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Noodles Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2011 at 11:05am
Gemma, I found a slow-worm under a discarded chopping
board once. I wonder what they?re trying to tell us!?

Mark, try getting your tin from your local scrap metal
yard. Use a more homespun, word of mouth, company such as
you might find in a Parish magazine, The Yellow pages
etc. Alternatively if you know, or have friends who know,
farmers make contact with them. Farmers often have
(roofing) materials knocking about and they frequently
wish to get rid of them. As I'm sure you know, tin with
an aged character seems to perform better anyhow, so you
end up paying much less and getting a better working
product.

Failing those try your local cookware store. Pots and
pans could well be the materials for 2011.

The methodology for carrying out surveys to accompany
planning applications or to seek similar permissions
should always include visual surveys. Whether these
searches are carried out or not, or indeed successful, is
another matter. It would depend, I think, on the
individual surveyor's experience, skill and commitment to
the project. It would certainly appear in the methodology
section of their report, or you would expect it to.
Rob
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