Tag: Black-Legged Kittiwake

Changes in body condition in breeding kittiwakes Rissa tridactyla

Black-legged Kittiwake (Rissa tridactyla) Science Article 3 abstract We investigated the seasonal pattern of changes in body condition of breedingblack-legged kittiwakes Rissa tridactyla in Svalbard (79 deg N) to evaluate whetherchanges in body condition were a consequence of the energetic demands of breeding(the reproductive stress hypothesis) or of voluntary anorexia to attain lower flightcosts during […]

CHICK DIET AND DAILY ACTIVITY PATTERN OFCOMMON MURRES AND BLACK-LEGGED KITTIWAKESAT BLUFF SEABIRD COLONY,NORTON SOUND, ALASKA

Black-legged Kittiwake (Rissa tridactyla) Science Article 9 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 […]

In kittiwakes food availability partially explains theseasonal decline in humoral immunocompetence

Black-legged Kittiwake (Rissa tridactyla) Science Article 10 abstract 1.The immune system plays an important role in fitness, and interindividual variationin immunocompetence is due to several factors including food supply.2. Seasonal variation in food resources may therefore explain why immunocompetencein bird nestlings usually declines throughout the breeding season J. GASPARINI et al, Functional Ecology 2006 20, […]

Sexual conflict over sperm ejection in monogamous pairsof kittiwakes Rissa tridactyla

Black-legged Kittiwake (Rissa tridactyla) Science Article 5 abstract Socially monogamous partners suffer conflicting interests concerning various aspects of reproduction such as parental care, copulation and fertilization. Female black-legged kittiwakes commonly eject their mates’ sperm immediately following copulations. Because sperm ejection reduces male sperm competitiveness and paternity assurance, males and females have conflicting interests as regards […]

Components of productivity in black-legged kittiwakes Rissatridactyla: response to supplemental feeding

Black-legged Kittiwake (Rissa tridactyla) Science Article 2 abstract In contrast to the high productivity of black-legged kittiwakes in Britain, kittiwakes at many colonies in Alaska have failed chronically to reproduce since the mid 1970s. To determine if food is limiting productivity and, if so, at what stages of nesting food shortages are most severe, in […]

Individual Variation in Field Metabolic Rate of Kittiwakes(Rissa tridactyla) during the Chick-Rearing Period

Black-legged Kittiwake (Rissa tridactyla) Science Article 4 abstract Field metabolic rate (FMR), using the doubly labelled water (DLW) method, was measured in free-ranging adult kittiwakes (Rissa tridactyla) early and late in the chick-rearing period at Svalbard, Norway. Individual variation in FMR was analysed by comparing FMR with body mass, sex, nest attendance, chick age, brood […]

Energy costs of chick rearing in Black-leggedKittiwakes (Rissa tridactyla)

Black-legged Kittiwake (Rissa tridactyla) Science Article 1 abstract We studied energy expenditure in adult Black-legged Kittiwakes (Rissa tridoctyla) with doubly labeled waterto measure energy costs of chick rearing. We removed eggs from randomly selected nests and compared energy expenditurelate in the chick-rearing period between adults raising chicks and adults whose eggs had been removed. Adultsraising […]

Energetics of Black-legged Kittiwake Rissa tridactyla chicks.

Black-legged Kittiwake (Rissa tridactyla) Science Article 6 abstract We compiled the energy budgets of Black-legged Kittiwake Rissa tridactyla chicks in Kongsfjorden, Svalbard (79 deg N, 12 deg E), utilising (1) deuterium turnover rates to estimate food intake, (2) the doubly labelled water ((D2O-O18) method in conjunction with mass gain measurement and carcass analysis to determine […]

Field metabolic rates of Kittiwakes Rissa tridactyla during incubation and chick rearing.

Black-legged Kittiwake (Rissa tridactyla) Science Article 7 abstract We used doubly labelled water to study the field metabolic rates of breeding Kittiwakes Rissa tridactyla during the incubation phase, and to compare these with the metabolic rates of Kittiwakes rearing chicks. During the incubation phase, birds with two eggs spent an average (