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NOUVELLES INFORMATIONS SUR LES COPEPODES CALANOIDES ET CYCLOPOIDES DES EAUX CONTINENTALES TUNISIENNES

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During the period 1992-1996, eighteen species of Copepoda Cyclopoida and Calanoida have been recorded in Tunisian continental water samples from 56 localities. Six species were noticed for the first time in Tunisia, three of which are new records for northern Africa. Two species represent Ethiopian elements (Paradiaptomus greeni (Gurney, 1906) and Thermocyclops tchadensis Dussart & Gras, 1966) and there is one oriental species (Apocyclops royi (Lindberg, 1940)) while Eucyclops serrulatus (Fischer, 1851) and Megacyclops gigas (Claus, 1857) are cosmopolitan, and Halicyclops neglectus Kiefer, 1935 is rather palaearctic. The majority of cyclopoid and calanoid copepods has been taken in "oueds" (both temporary and permanent waters). In Tunisian continental waters, about ten species were found in each climatic area, though there are some species particular to humid and sub-humid areas (Copidodiaptomus numidicus (Gurney, 1909) and Arctodiaptomus wierzejskii (Richard, 1888)) in northern Tunisia. Calanipeda aquaedulcis (Kritschagin, 1873) and Metacyclops minutus (Claus, 1863) occur especially in semi-arid areas. M. minutus (Claus, 1863) and Metadiaptomus chevreuxi (De Guerne & Richard, 1889) were found in the arid areas, particularly in central Tunisia.

Durant la periode 1992-1996, 18 especes de copepodes (Cyclopo des et Calano des) ont ete recoltees dans les eaux continentales tunisiennes. Cet inventaire fait etat de six especes qui sont nouvelles pour la Tunisie: Paradiaptomus greeni (Gurney, 1906), Thermocyclops tchadensis Dussart & Gras, 1966, Apocyclops royi Lindberg, 1940, Halicyclops neglectus Kiefer, 1935, Eucyclops serrulatus (Fischer, 1851) et Megacyclops gigas (Claus, 1857). Parmi ces especes, les trois premieres sont nouvelles pour l'Afrique du Nord. Les especes P. greeni et T. tchadensis sont deux elements ethiopiens, A. royi est une espece jusqu'alors seulement connue d'Asie (Inde, Chine). H. neglectus est une espece palearctique alors que M. gigas et E. serrulatus sont cosmopolites. Dans les eaux continentales tunisiennes, l'etude de la repartition des Copepodes Cyclopo des et Calano des en fonction des zones climatiques precedemment etablies conduisent aux resultats suivants: Copidodiaptomus numidicus (Gurney, 1909) et Arctodiaptomus wierzejskii (Richard, 1888) sont caracteristiques de la region humide a sub-humide, Calanipeda aquaedulcis (Kritschagin, 1873) et Metacyclops minutus (Claus, 1863) sont les elements principaux de la region semi-aride. M. minutus ainsi que Metadiaptomus chevreuxi (De Guerne & Richard, 1889) sont des especes plutot caracteristiques des regions arides du centre de la Tunisie.

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/content/journals/10.1163/156854099503258
1999-03-01
2015-02-01

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