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Horst Taraschewski – One of the best experts on this subject based on the ideXlab platform.

  • Invasion of a South African Anguilla mossambica (Anguillidae) population by the alien gill worm Pseudodactylogyrus anguillae (Monogenea).
    African Zoology, 2011
    Co-Authors: Denham Parker, Olaf L. F. Weyl, Horst Taraschewski

    Abstract:

    The parasitic gill monogenean Pseudodactylogyrus anguillae is alien to Africa. In an investigation of 227 longfin eel, Anguilla mossambica, and 26 mottled eel, Anguilla marmorata, sampled from four river systems in the Eastern Cape, South Africa, this parasite was only present on the gills of A. mossambica sampled from the Great Fish River system. In the Great Fish River, it infected 73.2% of the sampled population at a mean intensity of 63.8 ± 34.3 parasites per fish. High prevalence and intensity are indicative of a well-established alien invasive parasitic species. Results showing the absence of P. anguillae from the co-occurring but less abundant A. marmorata indicate that this species may be less susceptible to P. anguillae infection.

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  • Acanthocephalus reunionensis n sp (Acanthocephala: Echinorhynchidae), a parasite of Anguilla species (Anguillidae) from Reunion Island.
    Parasite, 2007
    Co-Authors: L.r. Smales, Pierre Sasal, Horst Taraschewski

    Abstract:

    In a survey of 118 eels Anguilla bicolor, A. marmorata and A. mossambica, (Anguillidae) indigenous to Reunion Island in the Mascarene island group, western Indian Ocean, a new species of acanthocephalan, Acanthocepholus reunionensis n. sp., was found. With a proboscis hook formula of 19 rows of 4-5 hooks, and elongated cement glands arranged in three pairs, this species differs from all other species in the genus. This is the first record of the genus Acanthocephalus occurring in eels from the African Region.

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  • n. sp. (Acanthocephala: Echinorhynchidae), a parasite of
    EDP Sciences, 2007
    Co-Authors: L.r. Smales, Pierre Sasal, Horst Taraschewski

    Abstract:

    In a survey of 118 eels Anguilla bicolor, A. marmorata and A. mossambica, (Anguillidae) indigenous to Reunion Island in the Mascarene island group, western Indian Ocean, a new species of acanthocephalan, Acanthocephalus reunionensis n. sp., was found. With a proboscis hook formula of 19 rows of 4-5 hooks, and elongated cement glands arranged in three pairs, this species differs from all other species in the genus. This is the first record of the genus Acanthocephalus occurring in eels from the African Region

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Sergio Caroli – One of the best experts on this subject based on the ideXlab platform.

  • A pilot study on the contents of selected pollutants in fish from the Tiber River (Rome)
    Microchemical Journal, 2005
    Co-Authors: Laura Mancini, Stefano Caimi, Silvia Ciardullo, Michaela Zeiner, Paola Bottoni, Lorenzo Tancioni, Stefano Cautadella, Sergio Caroli

    Abstract:

    In the framework of a project aimed at the study of the catchment basin of the Tiber River (Latium Region, Italy), a pilot survey was conducted in order to assess the presence of selected toxic trace elements, namely As, Cd, Hg and Pb, in muscle tissues of fish caught in different tracts of Tiber River (urban area of Rome and different rural areas upstream and downstream). The analysed species were Leuciscus cephalus (Ciprinidae) and Anguilla anguilla (Anguillidae). Determinations were carried out by means of Sector Field Inductively Coupled Plasma Mass Spectrometry (SF-ICP-MS). Preliminary data (ranges of concentration in mug g(-1), freeze-dried mass: As, 0.73-3.62; Cd, 0.0002-0.001; Hg, 0.18-0.31; Pb, 0.02-0.09) revealed no significant differences among the sets of results relevant to the various sampling stations. The total content of each element seems to be related with a general condition of low-level pollution of the area under study. (C) 2004 Elsevier B.V. All rights reserved

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  • A pilot study on the contents of selected pollutants in fish from the Tiber River (Rome)
    Microchemical Journal, 2004
    Co-Authors: Laura Mancini, Stefano Caimi, Silvia Ciardullo, Michaela Zeiner, Paola Bottoni, Lorenzo Tancioni, Stefano Cautadella, Sergio Caroli

    Abstract:

    Abstract In the framework of a project aimed at the study of the catchment basin of the Tiber River (Latium Region, Italy), a pilot survey was conducted in order to assess the presence of selected toxic trace elements, namely As, Cd, Hg and Pb, in muscle tissues of fish caught in different tracts of Tiber River (urban area of Rome and different rural areas upstream and downstream). The analysed species were Leuciscus cephalus (Ciprinidae) and Anguilla anguilla (Anguillidae). Determinations were carried out by means of Sector Field Inductively Coupled Plasma Mass Spectrometry (SF-ICP-MS). Preliminary data (ranges of concentration in μg g −1 , freeze-dried mass: As, 0.73–3.62; Cd, 0.0002–0.001; Hg, 0.18–0.31; Pb, 0.02–0.09) revealed no significant differences among the sets of results relevant to the various sampling stations. The total content of each element seems to be related with a general condition of low-level pollution of the area under study.

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Patrick Silan – One of the best experts on this subject based on the ideXlab platform.

  • Polymorphismes phénotypique et enzymatique: intérêt et limites dans la description d’espèces d’Helicometra (Trematoda: Opecoelidae), mésoparasites de téléostéens marins
    Systematic Parasitology, 1991
    Co-Authors: Jérôme Reversat, Claude Maillard, Patrick Silan

    Abstract:

    Dans le Golfe du Lion (Etang de Thau, France), trois trématodes appartenant au genre Helicometra et identifiés par l’électrophorèse des isoenzymes (Reversat et al. , 1989) sont renommés. A partir d’une analyse bibliographique portant sur tous les Helicometra du bassin méditerranéen, il est proposé: (1) que les individus porteurs de l’allèle MDH-1 ^aet parasites de Symphodus cinereus (Labridae) correspondent à Helicometra pulchella (Rudolphi, 1819) Odhner, 1902; (2) que les trématodes porteurs de l’allèle MDH-1 ^bet récoltés chez S. cinereus, Gobius niger (Gobiidae), Zosterisessor ophiocephalus (Gobiidae) et Anguilla anguilla (Anguillidae) prennent le nom d’ Helicometra gobii (Stossich, 1883) Stossich, 1904; (3) enfin, que les digènes associés aux allèles MDH-1 ^cet MDH-1 ^det parasites de A. anguilla, G. niger et Z. ophiocephalus se dénomment désormais Helicometra fasciata (Rudolphi, 1819) Odhner, 1902. L’accent est mis sur l’apport de la génétique biochimique en taxonomie des trématodes, mais aussi sur les problèmes qu’elle soulève. Le cas d’ Helicometra gobii est exemplaire; il révèle un polymorphisme phénotypique important pour un type enzymatique donné ( MDH-1 ^b.Le problème du caractère définitif de telles diagnoses est ainsi posé. Three trematodes belonging to the genus Helicometra from the “Golfe du Lion” (Etang de Thau, France) are identified and renamed on the basis of isoenzyme electrophoresis (Reversat et al. , 1989). After the bibliographical review of the genus Helicometra in the Mediterranean basin, the following results are proposed: (1) the specimens which possess the allele MDH-1 ^aare only found in Symphodus cinereus (Labridae): this taxon is considered to belong to Helicometra pulchella (Rudolphi, 1819) Odhner, 1902; (2) the trematodes bearing the allele MDH-1 ^bparasitise S. cinereus, Gobius niger (Gobiidae), Zosterisessor ophiocephalus (Gobiidae) and Anguilla anguilla (Anguillidae): these helminths are defined as Helicometra gobii (Stossich, 1883) Stossich, 1904; (3) and the digeneans defined genetically by the alleles MDH-1 ^cand MDH-1 ^dare found in A. anguilla, G. niger and Z. ophiocephalus are named Helicometra fasciata (Rudolphi, 1819) Odhner, 1902. The importance of the biochemical genetics for the study of taxonomy of trematodes is shown, but the problems these techniques raise are also discussed. The case of Helicometra gobii is typical: it exhibits a strong phenotypical polymorphism for an enzymatic type ( MDH-1 ^b).The problem of diagnostic characters for species definitions is therefore introduced.

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  • Polymorphismes phénotypique et enzymatique : intérêt et limites dans la description d’espèces d’Helicometra (Trematoda, Opecoelidae), mésoparasites de téléostéens marins.
    Systematic Parasitology, 1991
    Co-Authors: Jérôme Reversat, Claude Maillard, Patrick Silan

    Abstract:

    Dans le Golfe du Lion (Etang de Thau, France), trois trematodes appartenant au genre Helicometra et identifies par l’electrophorese des isoenzymes (Reversat et al., 1989) sont renommes. A partir d’une analyse bibliographique portant sur tous les Helicometra du bassin mediterraneen, il est propose: (1) que les individus porteurs de l’allele MDH-1aet parasites de Symphodus cinereus (Labridae) correspondent a Helicometra pulchella (Rudolphi, 1819) Odhner, 1902; (2) que les trematodes porteurs de l’allele MDH-1bet recoltes chez S. cinereus, Gobius niger (Gobiidae), Zosterisessor ophiocephalus (Gobiidae) et Anguilla anguilla (Anguillidae) prennent le nom d’Helicometra gobii (Stossich, 1883) Stossich, 1904; (3) enfin, que les digenes associes aux alleles MDH-1cet MDH-1det parasites de A. anguilla, G. niger et Z. ophiocephalus se denomment desormais Helicometra fasciata (Rudolphi, 1819) Odhner, 1902. L’accent est mis sur l’apport de la genetique biochimique en taxonomie des trematodes, mais aussi sur les problemes qu’elle souleve. Le cas d’Helicometra gobii est exemplaire; il revele un polymorphisme phenotypique important pour un type enzymatique donne (MDH-1b.Le probleme du caractere definitif de telles diagnoses est ainsi pose.

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  • Polymorphismes phénotypique et enzymatique : intérêt et limites dans la description d’espèces d’Helicometra (Trematoda, Opecoelidae), mésoparasites de téléostéens marins.
    Systematic Parasitology, 1991
    Co-Authors: Jérôme Reversat, Claude Maillard, Patrick Silan

    Abstract:

    Three trematodes belonging to the genus Helicometra from the “Golfe du Lion” (Etang de Thau, France) are identified and renamed on the basis of isoenzyme electrophoresis (Reversat et al., 1989). After the bibliographical review of the genus Helicometra in the Mediterranean basin, the following results are proposed: (1) the specimens which possess the allele MDH-1a are only found in Symphodus cinereus (Labridae) : this taxon is considered to belong to Helicometra pulchella (Rudolphi, 1819) Odhner, 1902 ; (2) the trematodes bearing the allele MDH-1b parasitise S. cinereus, Gobius niger (Gobiidae), Zosterisessor ophiocephalus (Gobiidae) and Anguilla anguilla (Anguillidae) : these helminths are defined as Helicometra gobii (Stossich, 1883) Stossich, 1904 ; (3) and the digeneans defined genetically by the alleles MDH-1c and MDH-1d are found in A. anguilla, G. niger and Z. ophiocephalus, and are named Helicometra fasciata (Rudolphi, 1819) Odhner, 1902. The importance of the biochemical genetics for the study of taxonomy of trematodes is shown, but the problems these techniques raise are also discussed. The case of Helicometra gobii is typical : it exhibits a strong phenotypical polymorphism for an enzymatic type (MDH-1b). The problem of diagnostic characters for species definitions is therefore introduced.

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