Pitfalls in sexing kittiwakes Rissa tridactyla on head + bill length

Changes in body condition in breeding kittiwakes Rissa tridactyla

We investigated the seasonal pattern of changes in body condition of breeding black-legged kittiwakes Rissa tridactyla in Svalbard (79°N) to evaluate whether changes in body condition were a consequence of the energetic demands of breeding (the reproductive stress hypothesis) or of voluntary anorexia to attain lower flight costs during chick rearing (the programmed anorexia hypothesis). Adult b...

Early Spring Wreck of Black-legged Kittiwakes Rissa Tridactyla in North Norway, April 2003

Barrett, R.T., Josefsen, T.D. & Polder, A. 2004. Early spring wreck of Blacklegged Kittiwakes Rissa tridactyla in North Norway, April 2003. Atlantic Seabirds 6(2): 33-45. Large numbers of dead Black-legged Kittiwakes Rissa tridactyla were washed ashore in 'orth 'orway in late April 2003. Inspection of 51 corpses indicated that they had died of starvation. More than 90% of those collected were m...

Inter- and intra-year variation in foraging areas of breeding kittiwakes (Rissa tridactyla)

While seabird conservation efforts have largely focused on protection from threats at the colony (e.g. reducing disturbance and predation), attention is increasingly being given to implementing protection measures for foraging areas at sea. For this to be effective, important foraging areas must be identified. Although numerous studies have examined seabird foraging behaviour, information is st...

Individual variation in field metabolic rate of kittiwakes (Rissa tridactyla) during the chick-rearing period.

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 size, and basal metabolic rate (BMR). Mean FMR of kittiwakes during the chick-rea...

Parental resource allocation among offspring varies with increasing brood age in Black-legged Kittiwakes Rissa tridactyla