Razorbill (Alca torda) Science Article 7 abstract 1.) Predation has been suggested as a major cause affecting survival, reproductive success and behaviour in vertebrate prey populations. The breeding season is a critical phase because the essential difference between selecting the proper nest site may be a question of breeding success and failure. 2.) Islands may […]
IMPACTS OF INTRASPECIFIC KLEPTOPARASITISM ANDDIET SHIFTS ON RAZORBILL ALCA TORDA PRODUCTIVITYAT THE GANNET ISLANDS, LABRADOR
Razorbill (Alca torda) Science Article 10 abstract Intraspecific kleptoparasitism, the stealing of food from members of the same species, has received widespread but mostly superficial attention in the scientific literature. However, the effects of such behavior can be significant. Here we report on high rates of intraspecific kleptoparasitism in the Razorbill Alca torda at the […]
Winter distribution, ecology and movements of Razorbills Alca torda and other auks in the outer Bay of Fundy, Eastern Canada.
Razorbill (Alca torda) Science Article 8 abstract Casual observations between 1992 and 1997 indicated that up to 25,000 Razorbills may occur around Grand Manan Island, Bay of Fundy, from December to February
Diet of Razorbill Alca torda chicks on Gr sholmen, central Baltic Sea
Razorbill (Alca torda) Science Article 6 abstract This paper describes the food of Razorbill Alca torda chicks on Gr sholmen in the central Baltic Sea and concludes that sprats Sprattus sprattus form the main diet, although sandeels Ammodytes sp. in some years constitute up to 22% by number. Clupeids, mainly sprats, are the most important […]
Can Norwegian and Russian Razorbills Alca torda be identified by their measurements
Razorbill (Alca torda) Science Article 4 abstract Razorbills Alca torda were measured in one Russian and five Norwegian colonies. A comparison with measurements from colonies in Britain, Ireland, Iceland and the Baltic Sea shows a clear correlation with the geographical position of each colony and a clinal increase in size from the south-west to north-east. […]
Comparison of migratory tendency in European Quail Coturnix c. coturnix, domestic Japanese Quail Coturnix c. japonica and their hybrids
Quail (Coturnix coturnix) Science Article 4 abstract Since the 1970s, the decline of the occidental populations of European Quail Coturnix c. coturnix, a partial migrant Galliform species, has driven the release of domestic Japanese Quail Coturnix c. japonica into the wild as game birds. Recent experiments suggest that reproductive isolating mechanisms have not developed to […]
Observations on the cloacal gland of the eurasian quail, Coturnix coturnix
Quail (Coturnix coturnix) Science Article 1 abstract While handling the Eurasian quail, Coturnix coturnix, in a game stocking program, the junior author noted that the breeding males issued a frothy fluid from their cloac . Upon examination we noted that this secretion originated in a gland located above the dorsal lip of the cloaca. There […]
African climate warming advances spring arrival of the Common Quail Coturnix coturnix
Quail (Coturnix coturnix) Science Article 5 abstract The Common Quail is one of the most popular steppe-land birds and is also one of greateconomic interest. Despite this, some aspects of its life cycle remain unclear, especially those concerned with the wintering phase. Here we report a long-term study of the spring arrival phenology of this […]
Kinematics and mechanics of ground take-off in the starling Sturnis vulgaris and the quail Coturnix coturnix .
Quail (Coturnix coturnix) Science Article 3 abstract The mechanics of avian take-off are central to hypotheses about flight evolution, but have not been quantified in terms of whole-body movements for any species. In this study, I use a combination of high-speed video analysis and force plate recording to measure the kinematics and mechanics of ground […]
Fluctuations related to rainfall in richness and abundance of birds of steppic Mediterranean habitats
Quail (Coturnix coturnix) Science Article 6 abstract The existence of interannual variations in the richness and abundance of bird species breeding in pseudo-steppic Mediterranean areas is analysed and related to the important fluctuations that take place in rainfall, which in turn deeply influence vegetation growth. The hypothesis of food limitation as a key factor in […]