Now showing items 1-5 of 5

  • Extreme diving behaviour in devil rays links surface waters and the deep ocean 

    Thorrold, Simon R.; Afonso, Pedro; Fontes, Jorge; Braun, Camrin D.; Santos, Ricardo S.; Skomal, Gregory B.; Berumen, Michael L. (Nature Publishing Group, 2014-07-01)
    Ecological connections between surface waters and the deep ocean remain poorly studied despite the high biomass of fishes and squids residing at depths beyond the euphotic zone. These animals likely support pelagic food ...
  • Ranging patterns of bottlenose dolphins living in oceanic waters : implications for population structure 

    Silva, Monica A.; Prieto, Rui; Magalhaes, Sara; Seabra, Maria I.; Santos, Ricardo S.; Hammond, Philip S. (2008-10)
    Very little is known about the ecology of common bottlenose dolphins (Tursiops truncatus) living in oceanic waters. This study investigated the ranging and residence pattern, of bottlenose dolphins occurring in the Azores ...
  • A review of interactions between cetaceans and fisheries in the Azores 

    Silva, Monica A.; Machete, Miguel; Reis, Dalia; Santos, Marco; Prieto, Rui; Damaso, Carla; Pereira, Joao Gil; Santos, Ricardo S. (2010-03)
    1. Interactions between cetaceans and fishing activity in the Archipelago of the Azores were examined using information contained in grey literature and previously unpublished data collected by observer programmes and ...
  • Sex bias in biopsy samples collected from free-ranging dolphins 

    Querouil, Sophie; Freitas, Luis; Dinis, Ana; Alves, Filipe; Cascao, Irma; Prieto, Rui; Silva, Monica A.; Magalhaes, Sara; Matos, Jose A.; Santos, Ricardo S. (2009-01-16)
    Biological samples of free-ranging dolphins are increasingly used to gain information on population structure and ecology. In small cetaceans, the gender of individuals usually cannot be determined at sea, and population ...
  • Spatial and temporal distribution of cetaceans in the mid-Atlantic waters around the Azores 

    Silva, Monica A.; Prieto, Rui; Cascao, Irma; Seabra, Maria I.; Machete, Miguel; Baumgartner, Mark F.; Santos, Ricardo S. (2013-02)
    Cetaceans living in offshore waters are under increasing pressure from anthropogenic activities. Yet, due to the lack of survey effort, relatively little is known about the demography or ecology of these populations. ...