introduction despite the limited anthropogenic activity in arctic regions, the levels of heavy metals are of concern and the arctic is considered as an important global sink for mercury depletion. mercury is not readily available to the food web in its natural form. however, inorganic mercury are converted to organic mercury compounds by microbial processes of anaerobic organisms. mehg is more ...

ABSTR•CT.--I assessed patterns of allozymic variation in Larus argentatus (Herring Gulls), L. cachinnans (Yellow-legged Herring Gulls), L. fuscus (Lesser Black-backed Gulls), L. glaucoides (Iceland Gull), L. hyperboreus (Glaucous Gulls), and L. marinus (Greater Black-backed Gull). I surveyed 34 presumed structural gene loci over 479 individuals. All birds were monomorphic and fixed for the same...

Gulls are a group of seabirds distributed worldwide that an important reservoir Salmonella spp. Salmonellosis is the second most commonly reported gastrointestinal infection in humans, and understanding role wild birds have spreading can help to improve health humans domestic animals. The mobility migration capacity gulls makes them interesting for research given their potential pathogens. This...

Distribution of sibling species Larus cachinnans (Pallas, 1811) and michahellis (J. F. Naumann 1840) were studied on coast the Black Sea. Originally, breeds seaside cliffs rocky islets Southern part Sea Crimean Peninsula. Having adapted to breeding roofs buildings, this is spread north along seaside: Novorossiysk eastern coast, Constanta western one. Additionally, an isolated population low-lyi...

—Sexual size dimorphism and determination of sex in Atlantic yellow-legged gulls Larus michahellis lusitanius from Northern Spain. Aims: We evaluate sexual size dimorphism in Atlantic yellow-legged gulls Larus michahellis lusitanius and provide a discriminant function to sex gulls in hand. Location: Two islands of the Basque Country (Northern Spain). Methods: Incubating gulls were trapped, band...

Oxidative stress has recently been suggested to play an important role in life-history evolution, but little is known about natural variation and heritability of this physiological trait. Here, we explore phenotypic variation in resistance to oxidative stress of cross-fostered yellow-legged gull (Larus cachinnans) chicks. Resistance to oxidative stress was not related to plasma antioxidants at ...

Because of the differential amplitude of climatic oscillations, species living at northern latitudes are subject to more frequent and more severe range oscillations than species at southern latitudes. As a consequence, northern populations should, on average, be phylogenetically younger and possess less phylogeographical structure than closely related taxa further south. To test these predictio...