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| Daly Yahia, Mn; Goy, J; Daly Yahia-kefi, O. |
| The Medusae of Tunis Gulf (25 species) are qualitatively the third zooplanktonic group after Tintinnids and Copepods. Anthomedusae (eight species), Trachymedusae (five species) and Leptomedusae (four species) represent the major part among the 20 species of Hydromedusae identified during our study (December 1993-November 1995). However, the Limnomedusae (two species) and the Narcomedusae (one species) are poorly represented. In the Bay of Tunis, Obelia spp., the most common and dominant species, command the quantitative fluctuations of Hydromedusae and reach exceptionally the density of 25 800 ind. m(-3). Within the Scyphomedusae (five species), Pelagia noctiluca is the most common species which outbreaks in winter and autumn. Tunis Gulf seems to be,... |
| Tipo: Text |
Palavras-chave: Méduses; Écologie; Golfe de Tunis; Méditerranée sud–occidentale; Jellyfish; Ecology; Tunis Gulf; SW Mediterranean. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00321/43255/42986.pdf |
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| Gueroun, Sonai M; Molinero, Juan-carlos; Piraino, Stefano; Dali Yahia, Mohamed Nejib. |
| Understanding the life cycle strategies and predatory impact of alien jellyfish species is critical to mitigate the impact that these organisms may have on local populations, biodiversity, and ultimately on the functioning of food webs. In the Mediterranean Sea, little is known about the dynamics of alien jellyfish, despite this biodiversity hotspot being one of the most threatened areas by increasing numbers of alien jellyfish. Here, we investigated the population dynamics and predatory impact of a non-indigenous scyphomedusa, Aurelia solida Browne 1905, in the Bizerte Lagoon, Tunisia. The study was based on bimonthly surveys performed over two consecutive years, from November 2012 to August 2014. Field observations showed that the planktonic phase of A.... |
| Tipo: Text |
Palavras-chave: Scyphomedusae; Abundance; Predation; Mesozooplankton; SW Mediterranean. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00624/73577/72966.pdf |
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