Guillemot (Uria aalge) Science Article 3 abstract The main purpose of this document is to propose a coordinated international banding plan for Thick-billed Murres and Common Murres. Banding is an essential tool for describing with mapping the winter distribution of different murre populations, identifying overlapping distributions, determining the timing of migration, and ascertaining impacts of […]
Category: Charadriiformes
CHICK DIET AND DAILY ACTIVITY PATTERN OFCOMMON MURRES AND BLACK-LEGGED KITTIWAKESAT BLUFF SEABIRD COLONY,NORTON SOUND, ALASKA
Guillemot (Uria aalge) Science Article 8 abstract At Bluff seabird colony, Norton Sound, Alaska, Common Murres(Uria aalge) fed their chicks with mostly blennies in the afternoon. Parents ofBlack-legged Kittiwakes (Rissa tridactyla) shifted chick guarding duties at any timeof day. Foraging trip time of the murres at Bluff (3.6 hr) was about 1.4-3.3 timeslonger than other […]
Wear of rings used on Guillemots Uria aalge: caution in the estimation of survival rates
Guillemot (Uria aalge) Science Article 1 abstract When ashore, a Guillemot Uria aalge usually walks with the tarsus in contact with the ground and this results in severe wear of rings. Even the change from soft to hard metal rings in the early 1960s only increased the useful life of a ring placed on a […]
Adult survival and avian cholera in Common Guillemots Uria aalge in the Baltic Sea
Guillemot (Uria aalge) Science Article 2 abstract Common Guillemots Uria aalge are long-lived seabirds with a low annual reproductive output; hence annual adult survival is a significant parameter for the sustainability of the population (Harris & Birkhead 1985, Hudson 1985). Oiling, bycatches, and large-scale oceanographic and foodweb changes are commonly considered to be potential major […]
Competition for breeding sites and site-dependent population regulation in a highly colonial seabird, the common guillemot Uria aalge
Guillemot (Uria aalge) Science Article 7 abstract The hypothesis of site-dependent population regulation predicts that birds utilize available nesting sites in a pre-emptive (ideal despotic) manner, leading to density dependence in heterogeneous habitats as poorer sites are used at higher population densities. At small population sizes adaptive site choice protects populations against fluctuations (the buffer […]
Long-term study of mortality in thecommon guillemot in the Baltic Sea
Guillemot (Uria aalge) Science Article 4 abstract This study is based on a uniquely large and long-term data set ofringed common guillemots (Uria aalge) in the Baltic Sea. We analysedrecoveries of 42,824 common guillemots ringed in Sweden from1912-1998. Most of the birds were juveniles ringed on the island ofStora Karlso in the southern Baltic proper. […]
Bycatches of common guillemot (Uria aalge) in the Baltic Sea gillnet fishery
Guillemot (Uria aalge) Science Article 5 abstract Bycatch of common guillemots (Uria aalge) appears to be the single most serious threat to the population, and the proportion ofrecoveries of ringed birds in fishing gear, compared with other finding circumstances, has significantly increased during a 28 yearperiod (P
A SECOND BREEDING RECORD FOR THE GREY-HOODED GULL (LARUS CZRROCEPHALUS) ON THE COAST OF PERU
Grey-hooded Gull (Chroicocephalus cirrocephalus) Science Article 1 abstract The Grey-hooded Gull (Larms cirrocephalus) is known to breed at only one locality west of the Andes, a small coastal pond named Laguna Chica in the Departamento de lea, Peru (Tovar and Ashmole, Condor 72:119, 1970). We report here a second and larger colony, 56 km north […]
Trematode parasitism as a possible factor in over-summering of Greater Yellowlegs (Tringa melanoleuca)
Greater Yellowlegs (Tringa melanoleuca) Science Article 1 abstract The possible relationship between trematode infestation and over-summering was explored in Greater Yellowlegs (ninga melanoleuca). Birds were collected throughout the year in coastal Venezuela to examine seasonal and age-related variation in digenean trematode infestations. Yellowlegs were infested with eleven digenean genera. Only four genera were common to […]
Predation by great skuas at a large Shetland seabird colony
Great Skua (Stercorarius skua) Science Article 1 abstract 1) Skuas are top predators in marine ecosystems and may have detrimental effects on seabird communities they prey upon. However, predation rates are poorly understood and poorly quantified. Using a bio-energetics model we estimate seabird predation by great skuas, Stercorarius skua , at a large UK colony […]