Merci pour la confirmation Eric
Citation de: Cyberfish le 11 11 11, 18:55 PM
[...] il s'agit de Pachypanchax sakaramyi, un Killi de Madagascar qui est menacé d'extinction.
Très menacé, en effet:
"Conservation status [de
P. sakaramyi]
Pachypanchax sakaramyi has been extirpated from most of its aboriginal range since
its description in 1928. Local residents ascribe its disappearance to predation by
introduced
Poecilia reticulata and
Gambusia holbrooki upon
P. sakaramyi fry. These
observations are consistent with the known impact of introduced
G. holbrooki upon
populations of indigenous cyprinodontiform fishes elsewhere (Courtenay and Meffe,
1989; Galat and Robertson, 1992). A factor of equal importance is ongoing deforestation
of the Ambohitra Massif, which changes the hydrological regime of small streams from
permanent to intermittent, resulting in the extirpation of their populations of
P. sakaramyi.
The most recent loss of habitat was occasioned by the diversion of the source of the
Sakaramy River in 2000 to provide drinking water for several private residences and the
guesthouse of the Benedictine monastery located on the outskirts of Ambohitra. This has
resulted in the virtual disappearance of the robust population of this species formerly
present in the headwaters of the Sakaramy River (Loiselle and Ferdenzi, 1997). At present,
substantial riverine populations of
P. sakaramyi persist only in the stretch of the river
between Ambohitra and the village of Sakaramy and in the headwaters of the adjacent
Antongombato River (O. Lucanus, pers. com.).
Pachypanchax sakaramyi is thus classified as critically endangered, following the
criteria established by the World Conservation Union (Raminosoa et al., 2002). A
managed population has been established in North America and Europe, but barring the
immediate implementation of an aggressive program of habitat protection and restoration,
the extirpation of the remaining riverine populations appears inevitable."
Loiselle, P. V. (2006): "A review of the Malagasy Pachypanchax (Teleostei: Cyprinodontiformes, Aplocheilidae), with descriptions of four new species",
Zootaxa, 1366: 19.
C'est c##
Laurent
