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Auteur Ben-Gharbia, H.; Yahia, O.K.-D.; Amzil, Z.; Chomerat, N.; Abadie, E.; Masseret, E.; Sibat, M.; Triki, H.Z.; Nouri, H.; Laabir, M. doi  openurl
  Titre Toxicity and Growth Assessments of Three Thermophilic Benthic Dinoflagellates (Ostreopsis cf. ovata, Prorocentrum lima and Coolia monotis) Developing in the Southern Mediterranean Basin Type Article scientifique
  Année 2016 Publication Revue Abrégée Toxins  
  Volume 8 Numéro 10 Pages 297  
  Mots-Clés coastal waters; Coolia monotis; environmental-factors; growth; gulf-of-california; harmful algal blooms; marine dinoflagellate; multiple sequence alignment; new-zealand; okadaic acid; Ostreopsis cf. ovata; Prorocentrum lima; Southern Mediterranean Sea; sp-nov dinophyceae; toxicity; toxin profile  
  Résumé Harmful benthic dinoflagellates, usually developing in tropical areas, are expanding to temperate ecosystems facing water warming. Reports on harmful benthic species are particularly scarce in the Southern Mediterranean Sea. For the first time, three thermophilic benthic dinoflagellates (Ostreopsis cf. ovata, Prorocentrum lima and Coolia monotis) were isolated from Bizerte Bay (Tunisia, Mediterranean) and monoclonal cultures established. The ribotyping confirmed the morphological identification of the three species. Maximum growth rates were 0.59 +/- 0.08 d(-1) for O. cf. ovata, 0.35 +/- 0.01 d(-1) for C. monotis and 0.33 +/- 0.04 d(-1) for P. lima. Toxin analyses revealed the presence of ovatoxin-a and ovatoxin-b in O. cf. ovata cells. Okadaic acid and dinophysistoxin-1 were detected in P. lima cultures. For C. monotis, a chromatographic peak at 5.6 min with a mass m/z = 1061.768 was observed, but did not correspond to a mono-sulfated analogue of the yessotoxin. A comparison of the toxicity and growth characteristics of these dinoflagellates, distributed worldwide, is proposed.  
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  Editeur Lieu de Publication Éditeur  
  Langue English Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 2072-6651 ISBN Médium  
  Région Expédition Conférence  
  Notes Approuvé pas de  
  Numéro d'Appel MARBEC @ alain.herve @ collection 1690  
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Auteur Kadarusman; Sugeha, H.Y.; Pouyaud, L.; Hocdé, R.; Hismayasari, I.B.; Gunaisah, E.; Widiarto, S.B.; Arafat, G.; Widyasari, F.; Mouillot, D.; Paradis, E. doi  openurl
  Titre A thirteen-million-year divergence between two lineages of Indonesian coelacanths Type Article scientifique
  Année 2020 Publication Revue Abrégée Sci Rep  
  Volume 10 Numéro 1 Pages 192  
  Mots-Clés biogeography; halmahera; latimeria-chalumnae; living fossils; mindanao; multiple sequence alignment; phylogenies; population; speciation; tectonic evolution  
  Résumé Coelacanth fishes of the genus Latimeria are the only surviving representatives of a basal lineage of vertebrates that originated more than 400 million years ago. Yet, much remains to be unveiled about the diversity and evolutionary history of these 'living fossils' using new molecular data, including the possibility of 'cryptic' species or unknown lineages. Here, we report the discovery of a new specimen in eastern Indonesia allegedly belonging to the species L. menadoensis. Although this specimen was found about 750km from the known geographical distribution of the species, we found that the molecular divergence between this specimen and others of L. menadoensis was great: 1.8% compared to 0.04% among individuals of L. chalumnae, the other living species of coelacanth. Molecular dating analyses suggested a divergence date of ca. 13 million years ago between the two populations of Indonesian coelacanths. We elaborate a biogeographical scenario to explain the observed genetic divergence of Indonesian coelacanth populations based on oceanic currents and the tectonic history of the region over Miocene to recent. We hypothesize that several populations of coelacanths are likely to live further east of the present capture location, with potentially a new species that remains to be described. Based on this, we call for an international effort to take appropriate measures to protect these fascinating but vulnerable vertebrates which represent among the longest branches on the Tree of Life.  
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  Editeur Lieu de Publication Éditeur  
  Langue English Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 2045-2322 ISBN Médium  
  Région Expédition Conférence  
  Notes WOS:000511157800002 Approuvé pas de  
  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2737  
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