Sandpiper (Actitis hypoleucos) Science Article 1 abstract Evolutionary theory predicts adaptive adjustment in offspring sex ratio by females. Seasonal change in sex ratio is one possibility, tested here in two sister species, the Common sandpiper and the Spotted sandpiper Actitis hypoleucos and A. macularia. In the monogamous Common sandpiper, males are the most competitive sex. […]
Category: Scolopacidae
Stopover ecology and divers migratory strategies use in the Common Sandpiper (Actitis hypoleucos)
Sandpiper (Actitis hypoleucos) Science Article 2 abstract Obtain information about the stopover ecology of the Common Sandpiper, to identify the divers estategies used by juvenile and adults and its contribution to the differential migration as well as try to explain the differences in the results of studies realized in the coast and interior. Alfonso BALMORI, […]
Arrival and weight gain of Red Knot Calidris canutus, Ruddy Turnstone Arenaria interpresand Sanderling Calidris alba staging in Delaware Bay in spring
Sanderling (Calidris alba) Science Article 3 abstract Delaware Bay is an important spring staging area for shorebirds migrating north along the easternAmerican coast, with birds relying heavily on Horseshoe Crab Limulus polyphemus eggs duringtheir stay. While many species use the Bay, three species are of particular interest: Red KnotCalidris canutus, Ruddy Turnstone Arenaria interpres and […]
Sanderlings (Calidris alba) have a magnetic compass: orientation experiments during spring migration in Iceland
Sanderling (Calidris alba) Science Article 1 abstract The migratory orientation of sanderlings (Calidris alba) was investigated with cage experiments during the spring migration in southwest Iceland. Sanderlings were exposed to 90 deg counterclockwise-shifted magnetic fields under both clear skies and natural overcast. Clear sky control tests resulted in a northerly mean direction, in agreement with […]
Spring migration of Sanderlings Calidris alba through SW Iceland: Wherefrom and whereto?
Sanderling (Calidris alba) Science Article 2 abstract The spring migration of Sanderlings Calidris alba through southwest Iceland was studied in 1989-1990. Additional information was collected during the spring seasons of 1985-88 and 1991. Ringing recoveries and controls, together with a large number of sightings of color-ringed birds, revealed that many Sanderlings staging in Iceland in […]
Arrival and weight gain of Red Knot Calidris canutus, Ruddy Turnstone Arenaria interpresand Sanderling Calidris alba staging in Delaware Bay in spring
Ruddy Turnstone (Arenaria interpres) Science Article 6 abstract Delaware Bay is an important spring staging area for shorebirds migrating north along the easternAmerican coast, with birds relying heavily on Horseshoe Crab Limulus polyphemus eggs duringtheir stay. While many species use the Bay, three species are of particular interest: Red KnotCalidris canutus, Ruddy Turnstone Arenaria interpres […]
Two estimates of the metabolic costs of antibody production in migratoryshorebirds: low costs, internal reallocation, or both?
Ruff (Philomachus pugnax) Science Article 1 abstract We measured the costs of mounting a humoral immune response using two novel antigens (tetanus and diphtheria) in two shorebird species (Scolopacid ): Red Knot (Calidris canutus, measured in autumn) and Ruff (Philomachus pugnax, measured in spring). Metabolic rate was measured during the preinjection phase, at the building […]
Biometrics of Ruffs Philomachus pugnax migrating in spring through southern Belarus with special emphasis on the occurrence of
Ruff (Philomachus pugnax) Science Article 2 abstract In spring, the Ruff Philomachus pugnax passes through European inland sites in large numbers. Birds from eastern and western parts of the breeding range may differ in biometrics, but data on this species in eastern Europe are scarce. The aim of this study was to describe the biometrics […]
Mitochondrial Control-Region Sequences in Two Shorebird Species, the Turnstone and the Dunlin, and Their Utility in Population Genetic Studies
Ruddy Turnstone (Arenaria interpres) Science Article 1 abstract Because of its rapid rate of sequence evolution, al most strictly maternal mode of inheritance, and lack of recombination, mitochondrial DNA (mtDNA) is the molecule of choice both for studies of intraspecific sequence divergence (Wilson et al. 1985; but see Gyllensten et al. I99 1) and for […]
Populations migrations biometrics and molt of the Turnstone Arenaria interpres interpres on the East Atlantic coastline with special reference to the Siberian USSR population
Ruddy Turnstone (Arenaria interpres) Science Article 2 abstract Three populations of Turnstone were studied. Primarily a series of comparisons were made between the Canadian-Greenland population which winters mainly in western Europe ad the Siberian population which winters partly in southern Africa. There was no long term change in the size of the latter population over […]