Summary of Sample analysed Species Number Number Proportion - - PowerPoint PPT Presentation

▶

Mar 03, 2023 202 likes •291 views

Summary of Sample analysed Species Number Number Proportion Number Mean tagged of birds of birds re- of re- number of re-sighted sighted (%) sightings re-sightings per bird Cape Vulture 8 6 75 27 3.4 African White-backed 93

SLIDE 1

SLIDE 2

Summary of Sample analysed

Species Number tagged Number

f birds

re-sighted Proportion

f birds re-

sighted (%) Number

f re-

sightings Mean number of re-sightings per bird

Cape Vulture

8 6 75 27 3.4

African White-backed Vulture

93 93 100 3529 37.9

Hooded Vulture

3 3 100 81 27.0

Marabou Stork

17 16 94 807 47.5

Total

121 118 98 4444 36.7

SLIDE 3

Summary of AWBV’s by Age

Age (years) Number 2 10 3 32 4-6 44 ≥7 7 Total 93

SLIDE 4

AWBV’s tagged per year

10 20 30 40 50 60 70 80 2005 2006 2007 2008 Tagged AWBV

SLIDE 5

Re-sightings per Annum

200 400 600 800 1000 1200 1400 2005 2006 2007 2008 2009 2010 AWBV Re-sightings recorded

SLIDE 6

AWBV Survival

0.93 0.94 0.95 0.96 0.97 0.98 0.99 1 1.01 2006 2007 2008 2009 Survival

SLIDE 7

Conclusions

Confirms the value patagial tagging

– various aspects of large bird movements – foraging range – survival

Concerted re-sighting effort

required

Survival rates for AWBV are very

high – requires more detailed analyses

Tagging did not affect survival