@article {14319, title = {Griffon vulture (Gyps fulvus) distribution and density in Crete}, journal = {Israel Journal of ZoologyIsrael Journal of Zoology}, volume = {50}, number = {4}, year = {2004}, note = {Cited By (since 1996): 2Export Date: 5 September 2006Source: ScopusReferences: Arroyo, B., Griffon Vulture Gyps fulvus (1994) Birds in Europe: Their Conservation Status, pp. 156-157. , Tucker, G.M., Heath, M.F., eds. BirdLife Conservation Series No. 3. BirdLife International, Cambridge, UK; Bahat, O., Choshniak, I., Houston, D., Nocturnal variation in body temperature of Griffon Vultures (1998) Condor, 100, pp. 168-171; Bonneau, M., Esquisse structurale de la Crete alpine, Rapp. 5, Coll. Regions Egeennes, Orsey (1976) Bull. Geol. Soc. 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Vegetation (1982), p. 147. , Publications de l{\textquoteright} Universite? de Provence, Marseille; Zar, J., Biostatistical analysis (1996), p. 718. , Prentice Hall, Upper Saddle River, NJ.}, month = {2004///}, pages = {341-354}, abstract = {Griffon vulture (Gyps fulvus) distribution and local density during 1996-2002 as well as the main characteristics of the species activity sites in Crete are described. Total area of occurrence has been estimated at 7000 km2 (85\% of the island). 5500 km 2 (67\%) accounted for its vital range, namely breeding and foraging, with spatial and temporal differences in correspondence to transhumant livestock. In total 68 activity sites were detected: (a) 34 colonies, of which 62\% on average were occupied by laying pairs in any one year; (b) six deserted colonies; and (c) 17 summer and 11 winter roosts. Most of the sites were found in southwest and northeast Crete on rocks of calcareous substrate. The species nesting and roosting sites were found on dolomitic and platy limestone cliffs, respectively. Mean altitude of activity sites was 650 m (SD = 442 m, range = 120-1900 m), whereas mean altitude of active colonies was 453 m (SD = 225 m, range = 120-1100 m). Cliffs were on average 182 m high (range = 40-540 m) facing southeast with a significant directionality for active colonies (southeast) and summer roosts (northwest). The distribution of activity sites was clumped, while the nearest neighboring distance was 6.2 km (range = 900 m-22.5 km). The spacing of active colonies was random with a tendency towards aggregation. The mean nearest distance between active colonies was 11 km (range = 9.1-13.3 km) and their average density for the species vital range was one active colony per 262 km2. The latter figure implied that each breeding group had a foraging range at a radius of ca. 9 km from the colony{\textquoteright}s cliff.}, keywords = {Aves}, author = {Xirouchakis, S.M. and Mylonas, M.} } @article {14320, title = {Selection of breeding cliffs by Griffon Vultures Gyps fulvus in Crete (Greece)}, journal = {Acta Ornithologica (Warszawa)Acta Ornithologica (Warszawa)}, volume = {40}, number = {2}, year = {2005}, note = {Export Date: 4 September 2006Source: ScopusReferences: Arroyo, B., Ferreiro, E., Garza, V., 2nd National Census of the Griffon Vulture (Gyps fulvus): Population, distribution, demography and conservation (1990), Serie Tecnica. ICONA. MAPA, Madrid; Bahat, O., Kaplan, A., Foraging behaviour in griffon vulture (1995) Torgos, 25, pp. 18-26; Birds in Europe: Population estimates, trends and conservation status (2004), BirdLife International BirdLife Conservation series No. 12. 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The species was found nesting in mid-altitude areas, close to stock-raising units, on high limestone cliffs, which were also well protected against the prevailing winds of the island. A principal components analysis, which explained 53\% of the total variance of the variables examined, differentiated Griffon Vulture colonies in relation to their isolation from other colonies, accessibility to humans and proximity to food resources. In addition, a stepwise discriminant function analysis between breeding and random cliffs included the height of the cliff, its substratum, the altitude, and the distance to the stock breeding unit in a model that successfully classified 97.1\% of the nesting and 88.2\% of the random cliffs. In comparison to continental regions the Griffon Vulture colonies in Crete were located on higher cliffs but at a lower altitude. This fact should be attributed to the species nesting on steep coastal cliffs close to the livestock{\textquoteright}s wintering areas.}, keywords = {Aves, breeding, Crete, Griffon Vulture, gyps fulvus, Nest sites}, author = {Xirouchakis, S.M. and Mylonas, M.} } @article {14321, title = {Status and structure of the griffon vulture (Gyps fulvus) population in Crete}, journal = {European Journal of Wildlife ResearchEuropean Journal of Wildlife Research}, volume = {51}, number = {4}, year = {2005}, note = {Cited By (since 1996): 1Export Date: 4 September 2006Source: ScopusReferences: Antor, R., Evolucion demografica de la poblacion: Estimacion de las tasa de supervivencia y el tamano de la pobalcion preadulta de Quebrantahuesos en el Pirineo. la parte (1999) FCQ Revista, 2, pp. 17-24; Bahat, O., Kaplan, A., Foraging behaviour in griffon vultures (1995) Torgos, 25, pp. 18-26; Birds in Europe: Population estimates, trends and conservation status (2004) BirdLife Conservation Series No. 12, p. 74. , BirdLife International Cambridge; Blondel, J., Habitat selection in Island versus Mainland Birds (1985) Habitat Selection in Birds, pp. 477-511. , Cody M (ed) Academic Press, San Diego; Borello, W.D., Borello, R.M., Demographic trends in cape griffon Gyps coprotheres colonies in Botswana, 1963-1992 (1993) Annales Muse?e Royal de l{\textquoteright}Afrique Centrale (Zoologie), 268, pp. 123-131. , Wilson RT (ed) Birds and the African Environment. 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Fieldwork was carried out during the breeding period when birds could be monitored in their colonies. Total population size was estimated at 379 individuals (range = 341-417) with adult birds comprising 63\%. The breeding population was estimated at 141 pairs, which were distributed on an average in 23 colonies per year (range = 16-30) while the mean number of breeding pairs that laid eggs was 98 (range= 64-126). Crete thus supports the largest insular population of the species in the world and hosts 70-80\% of the breeding population of the species in Greece. Population density was estimated at 6.9 individuals/100 km2, 2.6 breeding pairs/100 km2 and 1.8 nesting pairs/100 km2. The average home range of an occupied colony (i.e., breeding group) was estimated at ca. 204 km2 producing a theoretical foraging range of 8 km radius around the breeding cliff. No trends in the total number of individuals and breeding pairs appeared to exist, although significant differences in population size of individual colonies occurred between the years. The majority of the population was concentrated in small-sized colonies, which showed a low occupancy rate. The number of abandoned sites and the colonization of new ones could represent a shift of breeding pairs to alternative colonies provoked by local food abundance and conspesific attraction. {\textcopyright} Springer-Verlag 2005.}, keywords = {Aves, Colony occupancy, Crete, gyps fulvus, population size, Population structure}, author = {Xirouchakis, S.M. and Mylonas, M.} } @article {7481, title = {Breeding bird assemblages of eastern Mediterranean shrublands: composition, organisation and patterns of diversity}, journal = {Journal of OrnithologyJournal of Ornithology}, volume = {147}, number = {3}, year = {2006}, pages = {419-427}, publisher = {Springer}, keywords = {Aves}, author = {Katsimanis, N. and Dretakis, M. and Akriotis, T. and Mylonas, M.} }