Spatial scale

(1)

Multi‐scale movements of West African buffalo

Daniel Cornélis (CIRAD)

Simon Benhamou (CNRS, CEFE) Georges Janeau (CEFS, INRA) Cédric Gaucherel (AMAP, INRA)

(2)

Time scale

African buffalo area distribution & study area

African buffalo distribution area W Regional Park

Spatial

scale

West African buffalo distribution area

(3)

7 mixed herds GPS tracked (‐> 2 years) in W Regional Park

Spatial

scale

Time scale

W Regional Park 50 Km

(4)

Time scale

7 mixed herds GPS tracked (‐> 2 years) in W Regional Park

Spatial

scale

W Regional Park 50 Km

(5)

Time scale

7 mixed herds GPS tracked (‐> 2 years) in W Regional Park

Spatial

scale

W Regional Park 1 3 2 4 5 6 7 50 Km

(6)

Time scale

7 mixed herds GPS tracked (‐> 2 years) in W Regional Park

Spatial

scale

W Regional Park 1 3 2 4 5 6 7 50 Km

(7)

Time scale

Annual home ranges established on sections of permanent rivers

Spatial

scale

Niger river Tapoa river Mekrou river Niger river Tapoa river Mekrou river W Regional Park Permanent rivers 50 Km

(8)

Time scale

Space is organised according to watersheds

Spatial

scale

Niger river Tapoa river Mekrou river Niger river Tapoa river Mekrou river Permanent rivers Watersheds 50 Km

(9)

Time scale

Spatial

scale

Annual home range (herd 1)

Annual home range 5 Km

(10)

Time scale

Spatial

scale

Behaviour‐based segmentation of movement data

(11)

Time scale

Spatial

scale

Sub‐annual functional home range

Annual home range Late dry season home range 5 Km

(12)

Time scale

Spatial

scale

Sub‐annual functional home range (Utilisation Distribution)

Space use instensity Niger river 2 Km

(13)

Time scale

Spatial

scale

Habitat selection analyses

Perennial grasses Annual grasses Other 2 Km

(14)

Time scale

Spatial

scale

3 days movement sample

3 days movement Perennial grasses Annual grasses Other 2 Km

(15)

Movement data segmentation (residence time).

Spatial

scale

Perennial grasses Annual grasses

(16)

Time scale

Spatial

scale

Intensively used areas 3 days movement Sub‐annual functional home range _2 Km

(17)

Time scale

Spatial

scale

Sequence of movements

(18)

Time scale

Spatial

scale

Annual home range Sub‐annual functional home range Sub‐annual core areas 5 Km

(19)

Time scale

Spatial

scale

(20)

Time scale

Spatial

scale

(21)

Time scale

Spatial

scale

(22)

Time scale

Spatial

scale

(23)

Time scale

Spatial

scale

(24)

Time scale

Spatial

scale

Annual home range Sequence of movements 5 Km

(25)

CONCLUSION & PERSPECTIVES

Address questions at scales that are behaviour‐based rather than arbitrary make it possible to identify the various environmental scales at which an animal specifically reacts and the main determinants. The main determinants in our study (whole dataset) : ‐ Large scale (annual home range) : water ‐ Medium scale (“sub‐annual functional home range”) : perennial grasses ‐ Small scale, investigations about the way buffaloes alternate between intensive and extensive search are still under work. Determining the extent to which theses scales are coupled is a challenging perspective