Daniel Cornélis (Cirad Agirs &

(1)

Enjeux de conservation du buffle (Syncerus caffer brachyceros) au Parc Régional W (Burkina Faso, Bénin, Niger).

Daniel Cornélis (Cirad Agirs &

Cefe)

Simon Benhamou (CNRS Cefe )

Cédric Gaucherel (INRA Amap)

Georges Janeau (INRA Cefs)

Marie‐Noel de Visscher (Cirad Agirs)

(2)

African buffalo : a wide range and an extremely variable morphology

(3)

African buffalo : an ideal subject for intra‐specific comparison

(4)

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Burkina Faso

Niger

Bénin

Nigeria

Ghana

Complexe WAP

Parc transfrontalier Parc National Réserve totale Réserve partielle Zone de chasse Enclave

100 0 100 Kilometres

African buffalo : an emblematic species for nature‐based tourism in WAP Complex

(5)

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Burkina Faso

Niger

Bénin

Nigeria

Ghana

Complexe WAP

Parc transfrontalier Parc National Réserve totale Réserve partielle Zone de chasse Enclave

100 0 100 Kilometres

African buffalo : an emblematic species for nature‐based tourism in WAP Complex

(6)

Study area : W Regional Park (10.000 km

²

)

W Regional Park : an untamed ecosystem in an ocean of desertification

(7)

Buffalo & cattle herds distribution in early wet season (Aerial count, 2003)

Source :

Bouché & al. 2003

(8)

Recherche Gestion du Parc

Augmenter la charge en buffle du Parc

pour améliorer la qualité des prestations touristiques Objectifs

Mieux comprendre la dynamique spatio‐temporelle

de la population de buffles du Parc W

(9)

Tracking GPS (2007 & 2008) ‐> 7 mixed herds

(10)

Herds 1 to 7 : scatter of points

(11)

Herds 1 to 7 : annual home ranges

(12)

Movement data segmentation

(13)

Locations of a herd in late dry season (3h GPS fix interval)

(14)

Utilisation distribution (UD) estimated with a classical kernel method (LSCV)

(15)

Designing a movement‐based kernel density estimator

(16)

Taking obvious boundaries into account

(17)

Dry season ranges : space is partitioned according to surface water access

Herd 5

Herd 6

Herd 7

(18)

11 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(19)

12 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(20)

13 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(21)

14 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(22)

15 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(23)

16 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(24)

17 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(25)

18 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(26)

19 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(27)

20 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(28)

21 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(29)

22 / 04 /2007

Transition late dry season ‐> early wet season

(30)

23 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(31)

24 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(32)

25 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(33)

26 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(34)

27 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(35)

28 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(36)

29 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(37)

30 / 04 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(38)

01 / 05 /2007

Transition late dry season ‐> early wet season

(39)

02 / 05 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(40)

02 / 05 /2007 Transition late dry season ‐> early wet season

Herd 5

Herd 6

Herd 7

(41)

Utilisation Distribution (UD) overlaps analysis shows that :

1. Space is partitioned according to watersheds :

o Herds mainly exploit on one side of their main river.

o Home range is limited to the separation line of the adjacent water basin.

2.All year round, Overlap between herds is very low :

herds tend to exploit exclusive areas

(42)