Wednesday, 16 January 2013

Llanishen 2012

Following George's stats I've taken a look at mine:
Year Species New species Trap nights Total moths Moths per night
2005 215 215 29 3365 116.0
2006 308 145 66 4600 69.7
2007 243 49 122 5739 47.0
2008 206 27 90 2766 30.7
2009 208 16 72 1821 25.3
2010 255 35 87 2816 32.4
2011 319 40 99 4697 47.4
2012 276 25 113 3672 32.5
As with George's data mine hides a switch from Skinner to Robinson, but mine was in 2012. This may have bolstered the figures slightly. The other thing that makes a direct comparison slightly tricky is that I trap more often during the winter now than I did back in the first few years, so the moths per night is bound to drop. So all this dataset really tells me is that the Robinson trap has made a difference!
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1 comment:

  1. GMT17 January 2013 at 10:03

    Thanks for posting this Dave. I have the same problem with consistency from year to year, as I'm also doing more winter trapping now (though not as much as you as I don't do winter GMS).

    Despite the 'noise' in the data, the patterns in our gardens are similar, with 2007-2009 clearly being bad years, and 2011 the best year since then.

    Good to see you also added 25 species last year!

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