Digenean species diversity in teleost fishes from the Gulf of Gabes, Tunisia (Western Mediterranean)

This study is the first attempt to survey the diversity of fish digeneans in the Gulf of Gabes (southern coast of Tunisia). A total of 779 fishes belonging to 32 species were sampled. 53 species of Digenea belonging to 15 families were recorded. Among these species, 24 are reported for the first time from the coast of Tunisia. We report one new host record, Lecithochirium sp. from Sardinella aurita. The Hemiuridae is the dominant family. A host-parasite list is presented with the information on the prevalence, abundance and mean intensity of each species collected. The diversity of Digenea is compared with other localities in the Mediterranean Sea and the northern east of Tunisia. The Gulf of Gabes shows the lowest diversity linked to the anthropogenic activities and impact of exotic species. The use of Digenea as indicators of the state of the ecosystem is discussed

First detailed data on metazoan parasites of the rare species short beaked garfish Belone svetovidovi (Teleostei: Belonidae) from Tunisian coast, Central Mediterranean Sea

Forty five specimens of the short beaked garfish Belone svetovidovi, a rare belonid species largely confused with the garfish Belone belone from Tunisian coast Sea were examined for metazoan parasite. Nine metazoan parasites species were identified: one monogenean (Axine sp.), 4 digeneans (Lecithostaphylus retroflexus, Tergestia acanthocephala, Aponurus laguncula and Condylocotyla pilodora metacercaria), one copepod (Bomolochus bellones), one isopod (Irona nana), one acanthocephalan (Telosentis exiguus) and one nematod Hysterotylacium sp. Most of parasite species were new records for B. svetovidovi in Tunisia. In the parasite fauna of B. svetovidovi, digenean C. pilodora metacercaria was the most prevalent species (42%) followed by Monogenea Axine sp. (36%). The total length of the host did not influence parasitic infection in B. svetovidovi. The metazoan parasite composition of B. svetovidovi revealed great similarity than those of B. belone from Tunisia supporting same ecological behavior of both hosts

Digenean species diversity in teleost fishes from the Gulf of Gabes, Tunisia (Western Mediterranean)

This study is the first attempt to survey the diversity of fish digeneans in the Gulf of Gabes (southern coast of Tunisia). A total of 779 fishes belonging to 32 species were sampled. 53 species of Digenea belonging to 15 families were recorded. Among these species, 24 are reported for the first time from the coast of Tunisia. We report one new host record, Lecithochirium sp. from Sardinella aurita. The Hemiuridae is the dominant family. A host-parasite list is presented with the information on the prevalence, abundance and mean intensity of each species collected. The diversity of Digenea is compared with other localities in the Mediterranean Sea and the northern east of Tunisia. The Gulf of Gabes shows the lowest diversity linked to the anthropogenic activities and impact of exotic species. The use of Digenea as indicators of the state of the ecosystem is discussed

Particle Swarm Optimization for solving NLP and MINLP in chemical engineering

International audienceno abstrac

Aortic thrombosis due to a competitive blood flow with double mechanical circulatory assistance

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On the Image Watermarking Techniques Applications, Properties and fields

Résumé: L'expansion du world wide web et le volume sans cesse croissant de l'information digital (document, images, vidéos) mise à disposition du grand public, posent aujourd'hui un problème crucial qui n'est autre que celui du copyright . Dans ce sens nous assistons au développement de techniques représentants tout un nouveau domaine : le Watermarking . Cet article présente un état de l'art des techniques de watermarking ainsi q'un aperçu de domaines ou ces techniques sont applicables. Mot clés: Watermarting/ FFT/ DCT/DWT. On the Image Watermarking Techniques Applications, Properties and fields Abstract:With the coming and the expansion of the World Wide Web an increased amount of digital information, such as documents, images audio and video data become available to a large number of people. Since the digital network is often used to offer digital media for profit, there is a strong need for copyright protection and a considerable interest in methods for inserting in a multimedia document a visible, or preferably invisible, mark to identify the owner. In this work, we present this new field with more details. An overview of watermarking properties, and a peer evaluation of different embedding domains is done in this work. Besides copyright protection, watermarking can serve to other applications. A survey of them and their respective requirements is also done. Key words: Watermarking/ FFT/ DCT/ DWT. Revue d'Information Scientifique & Technique Vol.12(2) 2002: 39-4