| The Lincolnshire Bird Club http://lbcarchive.co.uk/forum/ |
|
| brent geese http://lbcarchive.co.uk/forum/viewtopic.php?f=2&t=18092 |
Page 1 of 1 |
| Author: | John Walker [ Sat Dec 08, 2012 9:13 am ] |
| Post subject: | brent geese |
A very poor breeding year for dark bellied brents with 3997 counted and aged in Lincolnshire, only 77 young found a little under 2%. regards John. |
|
| Author: | John Walker [ Sat Dec 22, 2012 11:24 am ] |
| Post subject: | Re: brent geese |
Count now 5834 of which 117 are birds of the year ( all in Lincs). regards John. |
|
| Author: | Stuart Britton [ Sat Dec 22, 2012 1:10 pm ] |
| Post subject: | Re: brent geese |
John, From your previous observations, what is the average percentage of juveniles over the past years? I appreciate that Brent Geese can live over 20 years but will such a low percentage have a long term effect on the overall population? Seasons greeting, Stuart |
|
| Author: | John Walker [ Sun Dec 23, 2012 10:01 am ] |
| Post subject: | Re: brent geese |
Hi Stuart, The Wildfowl and Wetlands trust collate all the data and have a web site with all the data gathered over the past 25 years, (mostly by volunteers.) Dark bellied brent have a succes cycle linked to the lemming population so when there are few lemmings brent goose eggs and young are taken by many predators as an alternative food supply, when a good lemming year fewer are predated. Succes rates in recent years 2007/8 11 % 08/09 1 % 09/10 5 % 10/11 13% 11/12 16%. seasons greetings John. |
|
| Author: | Stuart Britton [ Sun Dec 23, 2012 10:10 am ] |
| Post subject: | Re: brent geese |
Thanks for that John - I like lemmings and I hope they have a bumper breeding season in 2013! |
|
| Page 1 of 1 | All times are UTC [ DST ] |
| Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |
|