Regine Weckauf - Sexing Lesser Adjutant Storks

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Regine Weckauf - Sexing Lesser Adjutant Storks

  1. 1. Regine WeckaufSexing Lesser Adjutant Storks
  2. 2. Sexing

 Lesser

Adjutant

 Storks
26th
March
2012

 Siem
Reap
 Regine
Weckauf
 

  3. 3. 


?
or
  4. 4. Sexual
dimorphism


  5. 5. Lesser
Adjutant
Stork
 How
to
know?
 Male
or
 Female??
 
 Reliable
only
by
 DNA‐test
–
 feather
samples

 
 

  6. 6. Why
do
we
care? ?

  7. 7. PopulaJon
is
small
and
declining





























globally
listed
as
 


‘’Vulnerable’’

 Occurrence
of
Lesser
 Adjutant
Storks
 

  8. 8. Lateral
head
pictures
of
20
storks

  9. 9. 20
storks
x
19
measurements
=




  10. 10. RaJos!
• 
28
horizontal
measurement
raJos
 =
1660
RaJos
• 
55
verJcal
measurement
raJos

  11. 11. StaJsJcs
suck

  12. 12. but
they
give
nice
results

  13. 13. nice
results




Discriminant
 FuncJon
 Analysis

  14. 14. Discriminant
FuncJon
 V4=
Bill
height
 V7=
Commissural
point
to
crown

  15. 15. Example
Threshold
=
–
0.099

above
‐0.099
=
male
below
‐0.099
=
female


  16. 16. Greater
Adjutant
Stork

  17. 17. Greater
Adjutant
Stork

  18. 18. What
we
want
to
remember:
• 
There
are
Lesser
Adjutant
storks
in



Cambodia!

• 
Boy
and
girl
storks
look
alike
but
you


can
disEnguish
them
by
their
head


proporEon,
staEsEcally
proven

• 
We
like
them

  19. 19. Thank
 You

  20. 20. Thank You!Regine Weckauf

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