36 research outputs found

    The status of the coral reefs of French Scattered Islands in the Indian Ocean

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    Together with La Réunion and Mayotte Islands, Scattered Islands make up French Indian Ocean Territories (FIOT) which all possess highly ecologically sensitive natural habitats of major value for migrant species (turtles, seabirds, mammals). As a contribution to the national action plan of IFRECOR (French initiative on coral reefs) we set up during the period 2002-2005 a survey and monitoring program in order to increase the knowledge of the still poorly known coral reefs of these islands scattered from North to South in the Mozambique Channel and in central Indian Ocean. Results were particularly focused on the geomorphological mapping of shallow marine habitats and on a structural and functional approach of fish, coral and mollusc communities. Additional approaches with rapid assessment methods remained non exhaustive but nevertheless allow a first integrated diagnosis of the patrimonial value of the coral sanctuaries of Scattered Islands and to propose decision-making tools for identifying applied and fundamental axes of research as well as actions of monitoring adapted particularly to vulnerability factors and global warmingAvec l'île de la Réunion et Mayotte, les îles Éparses constituent les îles Françaises de l'océan Indien, lesquelles possèdent toutes des milieux naturels à sensibilité écologique forte et d'intérêt majeur pour des espèces migratrices (tortues, oiseaux marins, mammifères). Dans un contexte de mauvaise connaissance des récifs coralliens de ces îles éparpillées du Nord au Sud du canal du Mozambique et au centre de l'océan Indien occidental, nous avons réalisé de 2002 à 2005 un programme axé sur la connaissance et la surveillance des récifs, en vue de contribuer au plan d'action national de l'Initiative Française sur les Récifs Coralliens (IFRECOR). Les résultats concernent tout particulièrement la cartographie géomorphologique des milieux marins peu profonds ainsi qu'une approche structurelle et fonctionnelle des peuplements de poissons, coraux et mollusques. Les approches complémentaires menées selon des protocoles d'évaluation rapide restent non exhaustives mais permettent aujourd'hui de disposer d'un premier diagnostic intégré de la valeur patrimoniale des sanctuaires coralliens des îles Éparses et de proposer une aide à la décision pour identifier des axes de recherche appliquée et fondamentale, des mesures de gestion adaptées notamment aux facteurs de vulnérabilité tel que le réchauffement global

    Performing in the heat: a new practical midcooling method

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    Pre-cooling for endurance exercise performance in the heat: a systematic review.

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    PMCID: PMC3568721The electronic version of this article is the complete one and can be found online at: http://www.biomedcentral.com/1741-7015/10/166. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.Endurance exercise capacity diminishes under hot environmental conditions. Time to exhaustion can be increased by lowering body temperature prior to exercise (pre-cooling). This systematic literature review synthesizes the current findings of the effects of pre-cooling on endurance exercise performance, providing guidance for clinical practice and further research

    Phylogeography of Ostreopsis along West Pacific Coast, with Special Reference to a Novel Clade from Japan

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    BACKGROUND: A dinoflagellate genus Ostreopsis is known as a potential producer of Palytoxin derivatives. Palytoxin is the most potent non-proteinaceous compound reported so far. There has been a growing number of reports on palytoxin-like poisonings in southern areas of Japan; however, the distribution of Ostreopsis has not been investigated so far. Morphological plasticity of Ostreopsis makes reliable microscopic identification difficult so the employment of molecular tools was desirable. METHODS/PRINCIPAL FINDING: In total 223 clones were examined from samples mainly collected from southern areas of Japan. The D8-D10 region of the nuclear large subunit rDNA (D8-D10) was selected as a genetic marker and phylogenetic analyses were conducted. Although most of the clones were unable to be identified, there potentially 8 putative species established during this study. Among them, Ostreopsis sp. 1-5 did not belong to any known clade, and each of them formed its own clade. The dominant species was Ostreopsis sp. 1, which accounted for more than half of the clones and which was highly toxic and only distributed along the Japanese coast. Comparisons between the D8-D10 and the Internal Transcribed Spacer (ITS) region of the nuclear rDNA, which has widely been used for phylogenetic/phylogeographic studies in Ostreopsis, revealed that the D8-D10 was less variable than the ITS, making consistent and reliable phylogenetic reconstruction possible. CONCLUSIONS/SIGNIFICANCE: This study unveiled a surprisingly diverse and widespread distribution of Japanese Ostreopsis. Further study will be required to better understand the phylogeography of the genus. Our results posed the urgent need for the development of the early detection/warning systems for Ostreopsis, particularly for the widely distributed and strongly toxic Ostreopsis sp. 1. The D8-D10 marker will be suitable for these purposes

    Sharks and rays: A field guide to common elasmobranchs of East Africa

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