Rock Partridge (Alectoris graeca) Science Article 4 abstract The rock partridge (Alectoris graeca) is distributed in the Alps, Apennines and Balkans, in mountainous areas that were heavily affected by cyclic climate and landscape changes during the last Pleistocene glaciations. Some partridge populations have colonized and expanded their present ranges only after deglaciation and recent deforestation […]
Synchrony, scale and temporal dynamics of Rock partridge (Alectoris graeca saxatilis) populations in the Dolomites
Rock Partridge (Alectoris graeca) Science Article 1 abstract 1. We examine harvesting records of rock partridge (Alectoris graeca saxatilis) to first identify thepresence of cycles in a species with a southern European distribution and then examine synchronybetween populations at a range of scales.2. Hunting records from 1965 to 1994 were obtained from 210 hunting areas […]
Egg Production and Some Hatchability Characteristics of RockPartridges (Alectoris graeca) Mated at Different Rates
Rock Partridge (Alectoris graeca) Science Article 2 abstract This study was carried out to determine the hatchability characteristics of rock partridges mated at the ratio of one maleto three females, one male to four females and one male to five females. Egg production/hen (%), fertile eggs/hen, fertility,hatchability and hatchability of fertile eggs of one male […]
Evolutionary and conservation genetics of the rock partridge, Alectoris graeca
Rock Partridge (Alectoris graeca) Science Article 3 abstract Rock partridge (Alectoris graeca) populations are declining throughout their range due to habitat changes and overhunting. Massive restocking with captive-reared hybrid birds may lead to risk of genetic pollution. We sequenced 450 nucleotides from the mitochondrial DNA control-region, and genotyped eight microsatellite loci with the aim of […]
Open-habitat birds in recently burned areas: the role of the fire extent and species’ habitat breadth
Rock Bunting (Emberiza cia) Science Article 1 abstract Single burned areas contained 0 to 15 open-habitat species (mean = 7.6), and in all the areas combined there were 22 species, including 17 with an unfavourable conservation status in Europe. The most frequent were Carduelis cannabina, Lullula arborea, Alectoris rufa, Oenanthe hispanica and Emberiza cia, but […]
Diet and Foraging Behavior of Nesting Roadside Hawks inPete
Roadside Hawk (Buteo magnirostris) Science Article 1 abstract In 1993 and 1994, we collected dataon the diet and foraging behavior of Roadside Hawks(Buteo magnirostris) in primary tropical forest withslash-and-burn farming landscape nearby. We identified140 prey items brought to nests: 90 in the farminglandscape and 50 in the forest. Reptiles (57.1%, mostlylizards) and amphibians (24.3%) were […]
Different timing of autumn migration of two Ringed Plover Charadrius hiaticula subspecies through the southern Baltic revealed by biometric analysis
Ringed Plover (Charadrius hiaticula) Science Article 1 abstract Ringed Plovers were trapped in Puck Bay (southern Baltic) between 1983 and 2002 during autumn migration. In adults a clear decrease of mean wing and bill lengths occurred between the third decade (ten-day period) of July and the first decade of August. A similar pattern was observed […]
Predicting the population consequences of human disturbance for Ringed Plovers Charadrius hiaticula: a game theory approach
Ringed Plover (Charadrius hiaticula) Science Article 2 abstract Human disturbance and its potential impacts upon bird populations are currently topical and contentious issues for conservationists. Although many studies have revealed a behavioural impact, or even direct effect on breeding success or survival, these cannot usually be extended to predict the impact on population size. Here […]
Nesting of the Ringed Kingfisher in the United States
Ringed Kingfisher (Megaceryle torquata) Science Article 1 abstract According to the A.O.U. Check-list (fifth Ed., Baltimore, Amer. Ornithol. Union, 1957) the widespread neotropical Ringed Kingfisher (MegaceryIe torquata) is known from the United States only as ‘accidental on the lower Rio Grande in Texas (Laredo, June 2, 1888).’ More recent publications (Wolfe, Check-list of the birds […]
METABOLISM AND THERMOREGULATION IN HATCHLING WESTERN GULLS
Ring-billed Gull (Larus delawarensis) Science Article 9 abstract Parental attentiveness provides hatchlings of many precocial and serniprecocial birds with a large measure of protection from the vagaries of the thermal environment. Nonetheless some of these species differ in thermoregulatory capacity of newly hatched chicks, in correlation with climatic conditions during the breeding season. WILLIAM R. […]