|

Figure 8: Elephant distribution in Namibia
|
Elephants occur across the entire north of Namibia (Figure
8) with two main subpopulations in the north-east and
the north-west. The subpopulations are not genetically isolated
since they are weakly linked through the 'occasional' range
in the central area which includes a small resident population
of about 20 animals in the Mangetti. The north-western range
appears to be expanding at the moment. Elephants are being
seen as far south as the Ugab River and in all of the river
catchments which flow westwards to the Atlantic Ocean in the
north. As yet, the extreme north-western part of the potential
range along the Cunene has not been re-colonised although
elephants were present in this area up until 1990. Almost
certainly there are sporadic movements of elephants between
the two permanent ranges - although it would be unlikely
for animals in the extreme west of the north-west range and
the extreme east of the north-east range ever to be involved
in these movements.
The north-western range appears to be expanding at the moment.
Elephants are being seen as far south as the Ugab River and
in all of the river catchments which flow westwards to the
Atlantic Ocean in the north (Loutit, Leggatt, Owen-Smith,
pers.comm.). As yet, the extreme north-western part of the
potential range (the watersheds of rivers such as the Otjinjange
which flow into the Cunene) has not been re-colonised although
elephants were present in this area up until 1990. Lindeque
(pers.comm.) has speculated that, because all of the elephants
in this area were killed, the 'institutional memory' of the
remaining elephants in the south may not include a knowledge
of the northern watersheds and the Cunene River.
West of Etosha, human populations are relatively sparse and
most of the land between Etosha and the Skeleton Coast is
organised into conservancies - which should augur well for
the continued expansion of the elephant range. North of Etosha
are some of the highest density human populations in Namibia
reaching up to 100 persons/km2. IThe limit of the occasional
range of elephant can be regarded as the contour line demarcating
human densities greater than 1 person/25km2 (Figure
8). In this part of the north-western range conflicts
between humans and elephants is intense, especially in those
areas where conservancies have not been established.
The situation in the north-east is very different. A population
in excess of 100,000 elephants in Botswana is resulting in
significant dispersal of elephants into the Caprivi, Khaudum
and Nyae Nyae conservancy. Elephants are being seen for the
first time in 20 years in many parts of the eastern Caprivi
from which they have been absent. Surveys done by Botswana
in 1994 (ULG 1994) saw no elephants in Forest Reserve or Eastern
Floodplains.The West Caprivi Game Reserve (Babwata) and the
Forest Reserve in eastern Caprivi have always held very few
elephants because of the paucity of surface water. Rodwell
(1995) remarked that elephants were seasonal inhabitants in
these areas. However, in the most recent surveys, substantial
numbers were recorded. Much of the range in the Caprivi shown
as 'occasional' in the African Elephant Specialist Group data
(AfrESG 2002) should now more correctly be treated as 'permanent'.
It would be extremely difficult if not impossible to make
a distinction between elephants resident in the Caprivi and
elephants dispersing seasonally from Botswana, so dynamic
is the situation. Because the Caprivi is no more than a long
narrow strip between Botswana, Zambia and Angola, it could
be regarded simply as a transit area for elephant dispersal.
This has two major implications for elephant conservation
- firstly, the need for transboundary management becomes obvious
and, secondly, if biodiversity is to be conserved in the Caprivi
and Khaudum/Nyae Nyae areas, large numbers of elephants remaining
for too long in these areas will need to be discouraged -
particularly in the riparian and floodplain habitats.
|