Azure-winged Magpie (Cyanopica cyanus) Science Article 3 abstract Changes in the haematocrit in Azure-winged Magpies Cyanopica cyanus during the reproductiveperiod. Previous studies have suggested that the haematocrit could be related to a number of factors within the birds’ biological cycle. In this study, the variation found in the haematocrit of Azure-winged Magpies Cyanopica cyanus during […]
SEASONAL DISTRIBUTION OF THE AZUREGALLINULE (PORPHYRULA FLA l?1ltOST’Is),WITH COMMENTS ON VAGRANCY INRAILS AND GALLINULES
Azure Gallinule (Porphyrio flavirostris) Science Article 1 abstract Specimen records and field observations of the Azure Gallinule (Porphyrulu flavirostris) provide evidence that this species undergoes seasonal movements in portions of its range. Although present year-round in much of Amazonia, it is seasonal in the Guianas, southwestern Amazonia, and Paraguay. Data from single localities within these […]
Avian Pathogenic Escherichia coli in Audouin gulls (Larus audouinii). Could they affectthe surviving of the bird colonies?
Audouins Gull (Ichthyaetus audouinii) Science Article 3 abstract A total of 39 E. coli strains isolated from cloacal swabs and unhatched eggs of Audouin’s gulls (Larus audouinii) living the Salento coast (Italy) were serotyped and molecular characterized for the presence of irp2, fyuA, tsh, papC, fimC, iucD, and eae genes described for Avian Pathogenic E. […]
Testing habitat copying in breeding habitat selectionin a species adapted to variable environments
Audouins Gull (Ichthyaetus audouinii) Science Article 4 abstract The habitat copying hypothesis states that animals use the reproductive performance ofconspecifics to evaluate habitat quality and choose their future breeding site. We used datafrom Audouin’s GullLarus audouinii(1992
Lead (Pb) and Copper (Cu) Concentration in the Eggshells of Audouin’sGulls (Larus audouinii) in Turkey
Audouins Gull (Ichthyaetus audouinii) Science Article 1 abstract Audouin’s gull (Larus audouinii) eggshells from 2 archipelagos (Karaburun-
How costly is clutch formation in the Audouin’s Gull Larusaudouinii?
Audouins Gull (Ichthyaetus audouinii) Science Article 2 abstract During the Audouin’s Gull’s breeding season at the Ebro Delta in 1993, 24 fresh eggsfrom eight three-egg clutches (modal clutch-size) were collected at the peak of thelaying period. Eggs were processed to obtain formalin-fixed yolks, which were halvedand stained using the potassium dichromate method. Xavier Ruiz et […]
Pretty patterns but a simple strategy: predator-prey interactions between juvenile herring andAtlantic puffins observed with multibeam sonar
Atlantic Puffin (Fratercula arctica) Science Article 4 abstract Predator-prey interactions between Atlantic puffins (Fratercula arctica) and newly metamorphosed herring(Clupea harengus) were studied in the Lofoten-Rost area in northern Norway using a high-resolution multibeam sonarsystem. Attacks from diving puffins and predatory fish induced massive predator-response patterns at the school level,including bend, vacuole, hourglass, pseudopodium, herd, and […]
Relationship between wing length and body mass in atlantic puffin chicks
Atlantic Puffin (Fratercula arctica) Science Article 2 abstract Abstract.–Ages of Atlantic Puffin (Fratercula arctica) chicks are sometimes estimated by com-paring their wing lengths with a sample of known-aged chicks from the same colony. Thetechnique is reliable if the rate of wing growth is unaffected by variation in nutrition. Recentstudies suggest that wing growth may respond […]
Atlantic Puffin (Fratercula arctica) chick diet andreproductive performance at colonies with highand low capelin (Mallotus villosus) abundance
Atlantic Puffin (Fratercula arctica) Science Article 1 abstract We compared nestling diet and growth, breeding phenology, breeding success, and adult mass of AtlanticPuffins (Fratercula arctica) between two seabird colonies adjacent to ocean habitat with presumed high and low capelin(Mallotus villosus) abundance in 1996-1998. We hypothesized that puffins at their colony at Gannet Islands,Labrador, where capelin […]
Kinematics of diving Atlantic puffins (Fratercula arctica L.): evidence for an active upstroke
Atlantic Puffin (Fratercula arctica) Science Article 3 abstract To examine the propulsion mechanism of diving Atlantic puffins (Fratercula arctica), their three-dimensional kinematics was investigated by digital analysis of sequential video images of dorsal and lateral views. During the dives of this wing-propelled bird, the wings are partly folded, with the handwings directed backwards. The wings […]