1,721,046 research outputs found
An analysis of the sculptural pattern of the shell in Caribbean members of Chicoreus (Siratus) Jousseaume, 1880 (Gastropoda, Muricidae), with description of a new species
No full textMerle, Didier, Garrigues, Bernard, Pointier, Jean-Pierre (2001): An analysis of the sculptural pattern of the shell in Caribbean members of Chicoreus (Siratus) Jousseaume, 1880 (Gastropoda, Muricidae), with description of a new species. Zoosystema 23 (3): 417-431, DOI: http://doi.org/10.5281/zenodo.540057
Chicoreus Montfort 1810
No full textGenus Chicoreus Montfort, 1810 TYPE SPECIES. — Murex ramosus Linnaeus, 1758 by original designation.Published as part of Merle, Didier, Garrigues, Bernard & Pointier, Jean-Pierre, 2001, An analysis of the sculptural pattern of the shell in Caribbean members of Chicoreus (Siratus) Jousseaume, 1880 (Gastropoda, Muricidae), with description of a new species, pp. 417-431 in Zoosystema 23 (3) on page 426, DOI: 10.5281/zenodo.540057
Chicoreus (Siratus) hennequini Houart 2000
No full text<i>Chicoreus</i> (<i>Siratus</i>) <i>hennequini</i> Houart, 2000 <p>DESCRIPTION</p> <p> <i>C.</i> (<i>S.</i>) <i>hennequini</i> from Roatan Island (Honduras) superficially seems to <i>C.</i> (<i>S.</i>) <i>guionneti</i> in its short and well-indivualized intervarical nodules. However, it presents nodules on s1, s3, s4 and s5 (Merle <i>in</i> Houart 2000, fig. 16C), which are absent in <i>C.</i> (<i>S.</i>) <i>guionneti</i> n. sp. The most developped spines are on P1, P5 and MP, but the P3 spine is reduced (Merle <i>in</i> Houart 2000, fig. 16A). P3 spine is always present in <i>C.</i> (<i>S.</i>) <i>guionneti</i> n. sp. Moreover, <i>C.</i> (<i>S.</i>) <i>hennequini</i> shows a small foliation between ads and P5 (Merle <i>in</i> Houart 2000, fig. 16A), which is not observed in <i>C.</i> (<i>S.</i>) <i>guionneti</i> n. sp. The aperture of <i>C.</i> (<i>S.</i>) <i>hennequini</i> also differs in numerous and well-marked crenulations.</p>Published as part of <i>Merle, Didier, Garrigues, Bernard & Pointier, Jean-Pierre, 2001, An analysis of the sculptural pattern of the shell in Caribbean members of Chicoreus (Siratus) Jousseaume, 1880 (Gastropoda, Muricidae), with description of a new species, pp. 417-431 in Zoosystema 23 (3)</i> on page 429, DOI: <a href="http://zenodo.org/record/5400572">10.5281/zenodo.5400572</a>
Biogeography of the living Lymnaeidae
No full textThe distribution of the recent Lymnaeidae across continents and zoogeo-graphical regions of the world is reviewed, with a brief characteristic of the geo-graphical distribution of each extant lymnaeid genus. The quantitative estimates ofthe similarity between the lymnaeid faunas of different continents and the largestzoogeographical regions are provided and discussed. It is shown that the highesttaxonomic level of endemism in the family is observed in the Nearctic region, andthe overall faunal similarity is highest among the Palaearctic and Oriental region,whereas the Australian fauna is the most peculiar. A special section of the article isdevoted to a review of the invasive lymnaeid species and the possible consequencesof their invasions to the non-native areas.Fil: Vinarski, Maxim V.. Saint-Petersburg State University; Rusia. Russian Academy of Sciences; RusiaFil: Aksenova, Olga V.. The Ural Branch of the Russian Academy of Sciences; RusiaFil: Bolotov, Ivan N.. The Ural Branch of the Russian Academy of Sciences; RusiaFil: Vázquez, Antonio A.. Université Montpellier II; FranciaFil: Alda, Maria del Pilar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaFil: Pointier, Jean Pierre. Université de Perpignan; FranciaFil: Hurtrez Boussès, Sylvie. Centre National de la Recherche Scientifique; Francia. Université Montpellier II; Franci
Lymnaeid snails hosts of Fasciola hepatica and Fasciola gigantica (Trematoda: Digenea): A worldwide review
Get PDFFasciolosis is a snail-borne disease, causing serious public and veterinary health problems worldwide. This disease is produced by infection with Fasciola hepatica or Fasciola gigantica through the consumption of vegetables or water contaminated with the parasite’s metacercarial cysts. Both species of liver flukes are transmitted worldwide by small freshwater snails of the family Lymnaeidae. A global account on the species that are actually or may act as potential hosts of Fasciola spp., compiling particular research on their geographical distribution and susceptibility, is needed as a helpful tool in the understanding of fasciolosis transmission, and therefore in the control and prevention programmes of the disease. We have gathered here a comprehensive review of those lymnaeid species that are known to transmit the parasites in the field or that have been experimentally tested. We aim to bring forward the main intermediate hosts by regions in order to facilitate the understanding of worldwide transmission.Fil: Vázquez, Antonio A.. University of Montpellier; Francia. Instituto de Medicina Tropical Pedro Kouri; CubaFil: Alda, Maria del Pilar. University of Montpellier; Francia. Universidad Nacional del Sur; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Lounnas, Manon. University of Montpellier; FranciaFil: Sabourin, Emeline. University of Montpellier; Francia. Institut de recherche de la Tour du Valat; FranciaFil: Alba, Annia. Instituto de Medicina Tropical Pedro Kouri; CubaFil: Pointier, Jean Pierre. Université de Perpignan; FranciaFil: Hurtrez-Boussès, Sylvie. University of Montpellier; Franci
New record for Lymnaea neotropica (D'Orbigny 1835) in Argentina, with a detailed analysis of its morphology and molecular characteristics
Get PDFWe report for the first time the presence of Galba neotropica in Santa Fe province, Pampean Argentina. Until the present work, the identity of the intermediate host of Fasciola hepatica in this region, the most important livestock production area of Argentina, was unknown. This report extends the geographic distribution of G. neotropica and is the first to provide molecular and morphological information on this species in Argentina. During summer 2013, snails were collected on private livestock farms with high prevalence of fasciolosis in cattle. Specimens were identified by using the nuclear sequences of the internal transcribed spacers ITS-1 and ITS-2, the shell and the shape and size of the male reproductive organs. Molecularly, ITS-1 and ITS-2 nuclear sequences exhibit 100% nucleotide identity with G. neotropica from Lima, Peru. Morphologically, G. neotropica from Santa Fe province was indistinguishable from Galba viatrix and Galba cubensis, the other two cryptic species within this South American group of lymnaeids. The combination of molecular and morphological analyses is strongly recommended to identify lymnaeids at species level. The identity of the intermediate host and the subsequent knowledge of its susceptibility, behaviour, distribution, ecology and biology are important components in developing effective measures to control fasciolosis.Fil: Pujadas, Julieta Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; ArgentinaFil: Farber, Marisa Diana. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación en Ciencias Veterinarias y Agronómicas. Instituto de Biotecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Pointier, Jean Pierre. Centre National de la Recherche Scientifique; Francia. École Pratique des Hautes Études Sorbonne; FranciaFil: Giudici, Claudio. Universidad Nacional de Rosario. Facultad de Ciencias Veterinarias; ArgentinaFil: Wisnivesky, Maria Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; ArgentinaFil: Prepelitchi, Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentin
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Overview of interactions between parasitic digenea and their molluscan hosts, with special emphasis on the Lymnaeidae
No full textDigeneans (Platyhelminthes, Trematoda) are considered as a very ancient and as the most diversified group of internal metazoan parasites of animals. They can have important detrimental effects on human and animal health. They also affect populations dynamics of their hosts, are able to shape the structure of communities, and can act as determinants of ecosystems structure and functioning. Whereas life-cycles are diversified, the fundamental life-cycle of digeneans is characterized by a mollusc as the first intermediate host, where an important asexual multiplication occurs and by a vertebrate as definitive host. The interactions between digeneans and molluscs are complex; they start with the infection of the mollusc by the miracidial larval stage, which implies molecular mechanisms of attraction, recognition, and attachment. Once the penetration successful, an intimate association starts between the mollusc and the digenean, where the mollusc displays an intense immune response and, in turn, the digenean counter-attacks by different mechanisms. All these complex interactions can lead to high reciprocal specializations which can lead to host–parasite specificity. After its installation, the miracidium converts into a sporocyst which develops and starts an intense asexual multiplication, highly detrimental for the molluscan fitness. At the end of several cycles of asexual reproduction, the last larval stages, the cercariae, are emitted and will serve to infect the following host. Taking into account the complexity of mollusc–digenean interactions, their sensitivity to environmental perturbations and their importance in ecological and epidemiological risks, such interactions have to be particularly scrutinized. In this chapter, we review such host–parasite interactions with emphasis on the Lymnaeidae.Fil: Hurtrez Boussès, Sylvie. Université Montpellier II; Francia. Centre National de la Recherche Scientifique; FranciaFil: Alba, Annia. Centre National de la Recherche Scientifique; Francia. Institute of Tropical Medicine Pedro Kourí; CubaFil: Alda, Maria del Pilar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Université Montpellier II; FranciaFil: Chapuis, Elodie. Université Montpellier II; FranciaFil: Faugere, Dominique. Centre National de la Recherche Scientifique; FranciaFil: Gourbal, Benjamin. Centre National de la Recherche Scientifique; FranciaFil: Pointier, Jean Pierre. Centre National de la Recherche Scientifique; FranciaFil: Sánchez, Jorge. Instituto de Medicina Tropical Pedro Kourí; CubaFil: Vittecoq, Marion. Institut de Recherche de la Tour du Valat; FranciaFil: Vázquez, Antonio A.. Centre National de la Recherche Scientifique; Franci
El control biológico de los moluscos hospedadores intermediarios de los esquistosomas: el ejemplo de la región del Caribe
No full textEl control de los hospederos intermediarios de la esquistosomosis es un componente indispensable de la lucha integrada contra esta parasitosis. Los productos químicos de acción molusquicida han sido y continúan siendo utilizados de forma extensiva, para intentar eliminar al hospedero intermediario. Sin embargo, estos productos son caros y requieren ser aplicados repetidamente con la necesidad de disponer de una compleja y costosa estructura organizativa. Además, la acción de estos productos no es específica y los mismos son tóxicos para otros organismos como peces y crustáceos. Por lo anterior se ha impuesto la búsqueda de otras alternativas al control de moluscos y, entre ellas, el control biológico ha sido el objeto de importantes investigaciones en el transcurso de las últimas dos décadas (ver las revisiones de la O.M.S., 1984; Madsen, 1990; 1995; Pointier y Giboda, 1999; Pointier y Jourdane, 2000). El presente artículo tiene por objetivo exponer los principales resultados que han sido obtenidos en la región del Caribe
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