INFLUENCE DES FACTEURS ÉCOLOGIQUES SUR LA RÉPARTITION DES CHILOPODES DANS L'EST ALGÉRIEN

摘要

Prior to a physiological study to be conducted in the Annaba University, the distribution of Chilopods was first studied, in order to know more about the centipedes present in the biogeographical area of Annaba. Two sample places were studied, located in an Eucalyptus forest (Sidi Amar), and in a mediterranean steppa (Oued Zied), respectively. Animals were collected by the means of pitfall traps. Three species characterized Sidi Amar : Lithobiusforficatus L., Bothropolys elongatus Newport, Himantarium gabrielis Meinert. Four were present in Oued Zied : in addition to the previously cited, Scolopendra cingulata Latreille. This difference can be explained by structural differences of the soil. In Oued Zied stones and small rocks are mixed to the sediments : according to digging ability and habits of Scolopendra, it is suitable for this animal. The more abundant species in B. elongatus. A sex-ratio study (performed on stages ≥ PL4) showed, for females, a negative correlation with temperature, and at a lesser extend a positive correlation with rainy periods, and for males, no correlation at all.%La faune des Chilopodes de l'Est algérien (région de Annaba) a été étudiée par pié-geage. Seules quatre espèces ont été récoltées (Lithobius forficatus L., Bothropolys elon-gatus Newport, Himantarium gabrielis Meinert, Scolopendra cingulata Latreille). L'espèce la plus abondante est B. elongatus. Chez celte dernière espèce, nous avons étudié les fluctuations du sex-ratio et avons mis en évidence, pour les femelles, des corrélations, négatives vis-à-vis de la température, positive vis-à-vis de la pluviosité. Aucune corrélation n'a pu être mise en évidence chez les mâles.