spring versus autumn

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spring versus autumn

Postby Daniel Bohle » Sat Jun 11, 2016 11:38 pm

After reading some postings in the thread "Herps in September" I thought my data would be interesting - at least for some of you :D
( viewtopic.php?f=13&t=2483&sid=e62d298a17f51b1d54b2b8b9aaa946be#p24885 )

So here is a funky little boxplot from what I did the last years - data from 2006 up to 2015, about 348 field days and n= 4706 ... or maybe a few more or less (so far it is not the 100% final data) .
dab-vb.png


Whatever, keep in mind...its just for one species and just for my area.

I also could generate this for natrix natrix and anguis fragilis. but it is a lot of work!
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Re: spring versus autumn

Postby Berislav Horvatic » Sun Jun 12, 2016 12:39 am

Whatever, keep in mind...its just for one species and just for my area.

Thank you for the trouble, Daniel. Reliable statistical data like yours are always much more
convincing than random and singular personal impressions (both in space and time).
But it's really "just for one species and just for my area", and you have obviously been very
"lucky" with this particular species and, even more so, with your particular area.
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Re: spring versus autumn

Postby Niklas Ban » Mon Jun 13, 2016 2:55 pm

Very impressive data. Would be nice for some more informations about the habitat and the climate in it. I just want to compare it with the adder population I used to visit often.
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Re: spring versus autumn

Postby Alexandre Roux » Mon Jun 13, 2016 4:09 pm

I've been looking on some different websites from biolovision system and I can show you some results.
I took all the data numbers concerning Natrix natrix and that's how it goes:

Departement of Ain (France)
Image

Region of Bretagne
Image

Region of Auvergne
Image

Région of Languedoc-Roussillon
Image

Italy
Image
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Re: spring versus autumn

Postby Daniel Bohle » Mon Jun 13, 2016 4:39 pm

But what is the y - axis???
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Re: spring versus autumn

Postby Alexandre Roux » Mon Jun 13, 2016 4:49 pm

Daniel Bohle wrote:But what is the y - axis???


Data numbers into the database.
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Re: spring versus autumn

Postby Daniel Bohle » Mon Jun 13, 2016 5:36 pm

ok, these typ of data is easy to get but there is one big problem:
we see here fieldherpers activity combined with snake activity!
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Re: spring versus autumn

Postby Berislav Horvatic » Mon Jun 13, 2016 9:22 pm

Daniel Bohle wrote:... but there is one big problem: we see here fieldherpers activity combined with snake activity!

As always, in practical life. Noone can really afford hundreds of qualified researchers monitoring
hundreds of snakes... every day... all over the year... for a few years... That's a dream. We are
few, and do our best, under the circumstances...
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Re: spring versus autumn

Postby Daniel Bohle » Mon Jun 13, 2016 11:02 pm

Ok so now Natrix natrix ... again from 2006 - 2015, n = 1031, 613 days, 2151 hours
nana.jpg

first - pure observations
second - per fieldday
third - per hour
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Re: spring versus autumn

Postby Jeroen Speybroeck » Tue Jun 14, 2016 2:30 pm

A bit late to the party, but this catches my attention, of course.

What's with the division of months in 3 parts? Is that some sort of standard I'm not aware of?

Daniel, if your data is in a more or less decent format (i.e. not in 73 worksheets), I could write you a basic R script to perhaps generate these plots more easily? I assume the whiskers in your boxplot are min/max (and not 1.5*IQR)?
What output do you plan on writing? You obviously have enough data (if the standardisation in your field protocol is up to standard, that is), so there has to be stuff worth publishing in there. I'm starting to think about writing up salamander stuff myself, now that the book's finished. First a technical note about the CMR software.
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