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| Raven http://lbcarchive.co.uk/forum/viewtopic.php?f=3&t=6412 |
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| Author: | trevormlee [ Tue Oct 02, 2007 9:23 pm ] |
| Post subject: | Raven |
We now have a second pair of Raven resident in the county , a few miles from the Belton pair. They have been present together since August 2006, or at least thats when I first found them. They must surely be young birds from the Belton pair , presumably different generations, this has got me thinking about ' inbreeding ' within a species and how common it must be ? Does anybody have any info on this subject ? Regards Trev |
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| Author: | Kevin Durose [ Wed Oct 03, 2007 10:33 am ] |
| Post subject: | |
perhaps there are a few more pairs around, I saw one just to the west of Bourne a couple of weeks ago. |
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| Author: | Graham Catley [ Wed Oct 03, 2007 9:12 pm ] |
| Post subject: | |
I guess we never know when new stock joins an inbred population; the Barnacle Geese on the Humber originated from a single pair of injured birds which were kept in semi-captivity for many years; they bred and their young bred etc and last week I counted 341 so unless they have had some new blood then inbreeding does not seem to inhibit population expansion! |
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