Download or read book Les colonies d oiseaux marins en Ecosse written by Sergio Antonio Migliorini and published by . This book was released on 1991 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'Ecosse, de part sa situation géographique et sa géologie, est un endroit optimal pour l'installation des différentes colonies d'oiseaux de mer. La colonie est le mode de vie utilisé par la grande majorité de ces oiseaux pendant la saison de reproduction. Les espèces ayant opté pour ce lieu géographique sont au nombe de 24. Elles appartiennt à 3 ordres et 8 familles. Les différentes colonies sont réparties le long des10.000 km de côtes, mais les plus grosses concentrations sont présentes dans les archipels des Orcades et des Shetland au nord-est et celui des Hébrides à l'ouest. L'Ecosse abrite quelques 36.000.000 de couples d'oiseaux de mer et constitue un sanctuaire unique en Europe occidentale pour un grand nombre d'espèces, malheureusement l'exploitation excessive des réserves de nourriture de la plupart de ces oiseaux a provoqué une chute effrayante de certaines populations au cour de ces dernières années. Il conviendrait donc de préserver ces stocks naturels d'aliments (principalement des lançons) pour assurer la prérennité de ce patrimoine mondial
Download or read book Les colonies d oiseaux marins en Ecosse written by and published by . This book was released on 1991 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Les tiques identification biologie importance m dicale et v t rinaire written by PÉREZ-EID Claudine and published by Lavoisier. This book was released on 2007-06-01 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: Derrière leur apparence primitive, les tiques dissimulent de remarquables capacités de survie, de détection et de fixation à leur hôte. Strictement hématophages, ces animaux transmettent différents virus, bactéries ou parasites dont la liste ne cesse de s'allonger depuis vingt ans : maladie de Lyme, encéphalite à tiques, fièvre boutonneuse, ehrlichioses, anaplasmoses et babésioses. La tique constitue aujourd'hui le second arthropode vecteur reconnu, juste derrière le moustique, et la perspective des modifications climatiques annoncées pourrait en accroître l'expansion et en multiplier les méfaits. Afin de s'en protéger, il est conseillé de bien connaître ses stratégies, les lieux où elle abonde, ses préférences, les risques... Et parce que chaque espèce est singulière, mieux vaut spécifiquement l'identifier. Les tiques - Identification, biologie, importance médicale et vétérinaire concentre donc son étude sur la faune de France métropolitaine, d'une richesse incomparable, et intéressera les chercheurs et les praticiens en médecine humaine et vétérinaire, en parasitologie et en biologie médicale.
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Download or read book Protected Areas and the Bottom Line written by Canadian Council on Ecological Areas. Conference and published by Fredericton, N.-B. : Atlantic Forestry Centre = Centre de foresterie de l'Atlantique. This book was released on 1999 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a conference on protected areas and the integration of ecological, societal, and economic values. Topics of presentations include the importance of ecological areas, biological conservation, biodiversity, forest policy, system planning & management of protected areas, drawing ecological reserve boundaries, ecological land classification, marine & freshwater protected areas, and landowner views & responsibilities concerning protected areas.
