20.500.12556/DiRROS-20028 Roost-site characteristics of the Mediterranean shag Phalacrocorax aristotelis desmarestii along the Slovenian coast Značilnosti prenočišč sredozemskega vranjeka Phalacrocorax aristotelis desmarestii v slovenskem morju Several bird species utilize artificial structures for communal roosting. Between 26 May and 28 Jun 2012, the selection of buoys and times of departure by Mediterranean Shags Phalacrocorax aristotelis desmarestii were studied at three communal roosts within shellfish farms in the Bays of Sv. Jernej (Debeli rtič), Strunjan and Piran (Sečovlje). A total of 3,110 buoys were counted and categorized into two groups according to their shape (horizontal and vertical) and colours. The black horizontally floating buoys were of two types (barrelshaped and oval). The Shags chose to utilize the horizontally floating buoys only, most often black and white in colour. Owing to their poorer stability and smaller standing surface, the vertically floating buoys are clearly unsuitable for them. The highest share of Shags with regard to the number of buoys of separate types was registered on black barrel-shaped buoys. As the percentage of occupied buoys was similar at all roost sites (36–39%), it was deduced that Shags distribute evenly among roosts, regardless of the number of individuals present in the Slovenian sea. At the larger roost at Debeli rtič, the percentage of adult individuals (73.5%) was greater than at Strunjan (42.5%). This could be due to the competition for better places, given that competitively stronger individuals select safer larger roosts. Between 5.42 and 9.00 hrs, 53.3% and 69.1% of Shags departed from the roost sites at Debeli rtič and Strunjan, respectively, with the majority of departures recorded between 7.50 and 8.30 hrs. They left their roosts mostly individually (48.7%) or in pairs (23.3%), at Debeli rtič predominantly in the SW (58.9%) and W (16.9%) directions, and at Strunjan in the NE (42.3%) and N (38.5%) directions. Mediterranean Shag Phalacrocorax aristotelis desmarestii roost-site buoys Slovenian coast sredozemski vranjek Phalacrocorax aristotelis desmarestii prenočišče boje slovensko morje true false true Angleški jezik Slovenski jezik Neznano 2024-08-02 11:49:51 2024-08-02 11:49:52 2024-08-03 03:45:59 0000-00-00 00:00:00 2013 0 0 Soavtorji: Matej Gamser, Aleksander Kozina, Jure Novak, Mitja Denac; Besedilo v angl.; str. 5-11 št. 156/157 Letn. 34 2013 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2013-03-24 591 0351-2851 31306969 RAZ_Bordjan_Dejan_2013.pdf RAZ_Bordjan_Dejan_2013.pdf 1 C9BEA73470A846187EA8B32F91C89D56 9758ee079a1ec9b8c29338ffdaa80e132962cd6e23f5f993011875af2e0a42dd 4e7e2f76-50a4-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=27883 https://www.dlib.si/details/URN:NBN:SI:doc-XHDITIYJ 0 55bbef19-50a4-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=27884 Nacionalni inštitut za biologijo 0 0 0