Abundance and biomass of rotifers in relation to the environmental factors in geothermal waters in Southern Tunisia |
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| Authors: | Ikbel Sellami Asma Hamza Mohammed Alaoui Mhamdi Lotfi Aleya Abderrahmen Bouain Habib Ayadi |
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| Institution: | 1. Université de Sfax, Faculté des Sciences de Sfax. Unité de recherche UR/05ES05 Biodiversité et Ecosystèmes Aquatiques. Route Soukra, Km 3.5, BP 1171-CP 3000 Sfax, Tunisie;2. Institut National des Sciences et Technologie de la Mer, Centre de Sfax, BP 1035 Sfax 3018, Tunisie;3. Département de Biologie, Faculté des sciences, Université Sidi-Mohammed-Ben-Abdallah, BP 1796, Fès-Atlas, Morocco;4. Université de Franche-Comté, Laboratoire de Chrono-environnement, UMR UFC/CNRS 6249-Place Leclerc, F-25030 Besançon cedex, France |
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| Abstract: | The spatial and temporal dynamics of rotifers in relation to the physico-chemical parameters in Fish-Culture Research Station (Southern Tunisia) were studied monthly from February 2005 to January 2006. Thirteen rotifer species were found: Brachionus urceolaris, Brachionus calyciflorus, Brachionus sp., Lecane stichaea, Lecane rhytida, Lecane sp., Hexarthra mira, Rotaria tardigrada, Conochiloides natans, Trichocerca marina, Keratella quadrata, Keratella cochlearis and Notommata codonella. The most dominant rotifer was B. urceolaris (76% of total abundance). Rotifer density and water temperature were negatively correlated (r=−0.94, n=12, p=0.001). The highest abundance of rotifers was found in basin 4 (1.5×105 ind m−3, in June 2005). |
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| Keywords: | Fish-Culture Research Station Rotifers Physico-chemical parameters Temperature |
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