Dunlin (Calidris alpina) Science Article 2 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 constructing […]
Functional association of bill morphology and foragingbehaviour in calidrid sandpipers
Dunlin (Calidris alpina) Science Article 12 abstract Foraging behaviour in birds co-varies with bill morphology. Shorebirds exhibit pronouncedinter- and intra-specific variation in bill length and shape as well as in foraging behaviour.Pecking, or feeding on epifaunal intertidal invertebrates, is associated with a straight bill, while probing,feeding on infaunal prey S. NEBEL et al, University of […]
Testing the effects of recreational disturbance on two upland breeding waders
Dunlin (Calidris alpina) Science Article 7 abstract Previous work has shown that Golden Plovers Pluvialis apricaria guarding chicks utilize heavily disturbed habitat at a lower rate than surrounding areas, but that such rates of avoidance are reduced when the movement of people is restricted to a surfaced footpath. However, there remained some unanswered questions, which […]
Stable Isotope Analysis Reveals That Agricultural HabitatProvides an Important Dietary Component for NonbreedingDunlin
Dunlin (Calidris alpina) Science Article 4 abstract Although shorebirds spending the winter in temperate areas frequently use estuarine and supratidal (upland) feeding habitats, the relative contribution of each habitat to individual diets has not been directly quantified. We quantified the proportional use that Calidris alpina pacifica (Dunlin) made of estuarine vs. terrestrial farmland resources on […]
Sex recognition and breast stripe size in Great Tits.
Dunlin (Calidris alpina) Science Article 6 abstract The stopover of adult Dunlins, Calidris a. alpina during autumn migration at Ottenby, S.E. Sweden, was investigated. The proportion of Dunlins actively moulting their flight feathers was higher among second-year (2-yr) birds than among older ones (3-yr+). We compared stopover length, arrival body mass, departure body mass and […]
Feeding ecology of Dunlin Calidris alpina in a southern European estuary
Dunlin (Calidris alpina) Science Article 9 abstract The feeding ecology of Dunlin Calidris alpina wintering in southern European wetlands is poorly known. The aim of this paper is to describe the diet, prey selection, foraging habitat selection, and feeding behaviour of wintering Dunlins, and interpret this information in the light of the current knowledge on […]
Body mass increase migration pattern and breeding grounds of Dunlins Calidris alpina alpina staging in the dutch wadden sea in spring.
Dunlin (Calidris alpina) Science Article 5 abstract Though a lot is known about the Dunlin, a highly variable wader species in many respects, there is still uncertainty whether substantial numbers of this species migrating through W. Europe in spring, breed as far as Siberia. Data on numbers, turnover, recoveries, body mass and bill length of […]
Effects of weather on daily body mass regulation in wintering dunlin
Dunlin (Calidris alpina) Science Article 3 abstract We investigated the influence of changes in weather associated with winter storms on mass balance, activity and food consumption in captive dunlin (Calidris alpina) held in outdoor aviaries, and compared the aviary results with weather-related body mass differences in free-living dunlin collected at Bolinas Lagoon, California. Captive birds […]
BEHAVIOR, DIET, AND BREEDING BIOLOGY OF DOUBLETOOTHED KITE AT A GUATEMALAN LOWLAND SITE
Double-toothed Kite (Harpagus bidentatus) Science Article 1 abstract We studied Double-toothed Kites (Harpagus bidentatus) in tropical lowlandforest at Tikal National Park, Peten, Guatemala, documenting behavior and diet during theincubation and nestling periods. These 200-g kites are Accipiter-like in form and strikinglysize-dimorphic for a kite. Modal clutch size was two, producing 0.63 fledglings per nestingattempt and […]
Prey fish consumption by Double-crested Cormorants in western Lake Erie near WestSister Island, Ohio
Double-crested Cormorant (Phalacrocorax auritus) Science Article 18 abstract The objectives for this study were to: 1) determine the diet of Double-crested Cormorants (Phalacrocorax auritus, hereafter: cormorants) in western Lake Erie; 2) to determine if yellow perch (Perca flavescens) or walleye (Sander vitreus) were a noteworthy prey item; and 3) to determine if the invasive round […]