Manioc : Portail | resultats 21 - 40 pour la recherche: Society for Range Management

Four years' residence in the West Indies
Auteur(s) : Bayley, Frederic William Naylor (1808-1853)
Auteurs secondaires : Haghe, Charles (1810-1888) Day, William (1797-1845)
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Antigua and the Antiguans: a full account of the colony and its inhabitants from the time of the Caribs to the present day, interspersed with anecdotes and legends : also, an impartial view of slavery and the free labour systems, the statistics of the island, and biographical notices of the principal families, Volume 1
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Speeches of Henry Lord Brougham, upon questions relating to Publics Rights, Duties, and Interests
Auteur(s) : Brougham, Henry (1778-1868)
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The history, civil and commercial, of the British colonies in the West Indies. Volume I
Auteur(s) : Edwards, Bryan (1743-1800)
Auteurs secondaires : Bartolozzi, Francesco (1727-1815) West, Benjamin (1738-1820) Milton, Thomas (1743?-1827)
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Histoire des plantes de la Guiane françoise, rangées suivant la méthode sexuelle : avec plusieurs mémoires sur différens objets intéressans, relatifs à la culture & au commerce de la Guiane françoise, & une notice des plantes de l'Isle-de-France : ouvrage orné de près de quatre cents planches en taille-douce, où sont représentées des plantes qui n'ont point encore été décrites ni gravées, ou qui ne l'ont été qu'imparfaitement. Tome second
Auteur(s) : Fusée-Aublet, Jean Baptiste Christian (1720-1778)
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Grey and harbour seals in France: distribution at sea, connectivity and trends in abundance at haulout sites
Auteur(s) : Vincent, Cécile Huon, Mathilde Caurant, Florence Dabin, Willy Deniau, Armel Dixneuf, Stéphane Dupuis, Laetitia Elder, Jean-François
Auteurs secondaires : LIttoral ENvironnement et Sociétés - UMR 7266 (LIENSs) ; Université de La Rochelle (ULR) - Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) ; Université de La Rochelle (ULR) - Centre National de la Recherche Scientifique (CNRS) Université des Antilles et de la Guyane (UAG) UMR 228 Espace-Dev, Espace pour le développement ; Institut de Recherche pour le Développement (IRD) - Université de Perpignan Via Domitia (UPVD) - Université Nice Sophia Antipolis (UNS) ; Université Côte d'Azur (UCA) - Université Côte d'Azur (UCA) - Université d'Avignon et des Pays de Vaucluse (UAPV) - Université de la Réunion (UR) - Université de Montpellier (UM) - Université de Guyane (UG) - Université des Antilles (Pôle Martinique) ; Université des Antilles (UA) - Université des Antilles (UA) - Université des Antilles (Pôle Guadeloupe) ; Université des Antilles (UA) Laboratoire d'Etude des Mammifères Marins (LEMM) ; Océanopolis Sea Mammal Research Unit ; University of St Andrews [Scotland] Observatoire Avifaune de la ZPS Estuaire et Marais de la Basse Seine (Maison de l'Estuaire) Observatoire PELAGIS UMS 3462 (PELAGIS) ; LIttoral ENvironnement et Sociétés - UMR 7266 (LIENSs) ; Université de La Rochelle (ULR) - Centre National de la Recherche Scientifique (CNRS) - Université de La Rochelle (ULR) - Centre National de la Recherche Scientifique (CNRS) - Centre National de la Recherche Scientifique (CNRS)

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
Grey (Halichoerus grypus) and harbour seals (Phoca vitulina) are sympatric seal species, but they display distinct strategies of habitat use and connectivity between haulout sites. The distribution patterns and variations in relative abundance of both species were investigated along the French coast of the English Channel, at the southern limit of their range where seal numbers are increasing. Regular censuses conducted at all main haulout sites in mainland France showed significant seasonal variations at most sites, with more harbour seals counted during summer (breeding and moulting seasons), and more grey seals during summer only in the eastern English Channel. Trends in maximum haulout numbers at haulout sites showed a significant increase over the last five years, ranging from 9.7 to 30.9% per year for harbour seals, and from 5.8% (in the western English Channel) to 49.2% (in the eastern English Channel) per year for grey seals. These rates of increase in grey seal numbers are not linked to local pup production and most probably result from seal movements from the southwest British Isles and the North Sea, respectively. Aerial surveys conducted across the English Channel showed that most seal observations at sea were concentrated in the north-eastern English Channel. Telemetry showed that the 28 harbour seals tracked remained highly coastal, within a radius of 100 km from their haulout sites, and did not move to other known colonies. Grey seals moved much greater distances, reaching up to 1200 km from their capture site. More than half of the 45 grey seals tracked crossed the English Channel, especially during the breeding season, moving to known colonies in the southwest British Isles and the North Sea. Combining individual tracks and long-term surveys of the seal populations allowed a better understanding of the dynamics of these populations and their connectivity at a larger regional scale. The findings provide direct information for the management of grey and harbour seals within the frame of the Marine Strategy Framework Directive, and highlight focus areas where potential interactions between the two species should be monitored.
ISSN: 0967-0645

hal-01509674
https://hal.archives-ouvertes.fr/hal-01509674
DOI : 10.1016/j.dsr2.2017.04.004

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