Locomotor behaviour in males,females and groups of Orchestia montagui (Amphipoda,Talitridae) in the supralittoral zone of Bizerte lagoon |
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Authors: | Anas Ayari Chedlia Ghemari Karima Nasri–Ammar |
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Institution: | Faculty of Science of Tunis, Research Unit of Bio-ecology and Evolutionary Systematic, University of Tunis El Manar II, Tunis, Tunisia |
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Abstract: | Locomotor activity rhythm of Orchestia montagui was investigated under constant darkness in a population collected in spring from the supralittoral zone of Bizerte lagoon (northern region of Tunisia) at Menzel Jmil in spring. This rhythm was recorded in individual and groups of animal by infrared actography every 20 min by multichannel data loggers, at a constant temperature of 18 ± 0.5 °C. According to double-plotted actograms, wave forms and periodogram analysis, results revealed different locomotor pattern. However, locomotor activity rhythm of males was more stable than females. Furthermore, the mortality was statistically higher in unmixed groups than in mixed groups. |
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Keywords: | Social synchronization locomotor rhythm Orchestia montagui mutual interaction individual groups genders |
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