Search Results - "Kitaysky, A"

Corticosterone release in very young siblicidal seabird chicks (Rissa tridactyla) is sensitive to environmental variability and responds rapidly and robustly to external challenges by Benowitz-Fredericks, Z.M., Will, A.P., Pete, S.N., Whelan, S., Kitaysky, A.S

“…•Five-day old siblicidal seabird chicks show no adrenal hyporesponsive period.•Chick baseline corticosterone (CORT) was lower when parents were food…”
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Telomere length correlates with physiological and behavioural responses of a long-lived seabird to an ecologically relevant challenge by Benowitz-Fredericks, Z M, Lacey, L M, Whelan, S, Will, A P, Hatch, S A, Kitaysky, A S

“…Determinants of individual variation in reallocation of limited resources towards self-maintenance versus reproduction are not well known. We tested the…”
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Differential reproductive responses to stress reveal the role of life-history strategies within a species by Schultner, J., Kitaysky, A. S., Gabrielsen, G. W., Hatch, S. A., Bech, C.

“…Life-history strategies describe that ‘slow’- in contrast to ‘fast’-living species allocate resources cautiously towards reproduction to enhance survival…”
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Dynamics of Food Availability, Body Condition and Physiological Stress Response in Breeding Black-Legged Kittiwakes by Kitaysky, A. S., Wingfield, J. C., Piatt, J. F.

“…1. The seasonal dynamics of body condition (BC), circulating corticosterone levels (baseline, BL) and the adrenocortical response to acute stress (SR) were…”
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Seabirds and climate change: roadmap for the future by Sydeman, WJ, Thompson, SA, Kitaysky, A

“…Based in part on a symposium held at the first World Seabird Conference in September, 2010 in Victoria, BC, Canada, we present a Theme Section (TS) on the…”
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Inter-annual climate variability affects foraging behavior and nutritional state of thick-billed murres breeding in the southeastern Bering Sea by Kokubun, N., Takahashi, A., Paredes, R., Young, R. C., Sato, N. N., Yamamoto, T., Kikuchi, D. M., Kitaiskaia, E. V., Ito, M., Watanuki, Y., Will, A. P., Lauth, R., Romano, M. D., Kitaysky, A. S.

“…Warm oceanographic conditions of the continental shelf regions in the southeastern Bering Sea are associated with drastic increases in the abundance of…”
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Climate affects food availability to planktivorous least auklets Aethia pusilla through physical processes in the southeastern Bering Sea by Dorresteijn, I, Kitaysky, AS, Barger, C, Benowitz-Fredericks, ZM, Byrd, GV, Shultz, M, Young, R

“…Climate change might affect marine top predators by altering availability and nutritional quality of their prey. Climate effects vary on a regional basis, and…”
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Benefits and costs of increased levels of corticosterone in seabird chicks by Kitaysky, A.S, Kitaiskaia, E.V, Piatt, J.F, Wingfield, J.C

“…Seabird chicks respond to food shortages by increasing corticosterone (cort) secretion, which is probably associated with fitness benefits and costs. To…”
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Corticosterone facilitates begging and affects resource allocation in the black-legged kittiwake by Kitaysky, Alexander S., Wingfield, John C., Piatt, John F.

“…Parent black-legged kittiwakes (Rissa tridactyla) and their dependent chicks respond to food shortages by increasing circulating levels of corticosterone. To…”
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Effects of Prenatal Environment on Phenotype Are Revealed by Postnatal Challenges: Embryonic Hormone Exposure, Adrenocortical Function, and Food in Seabird Chicks by Benowitz-Fredericks, Z. M., Schultner, J., Kitaysky, A. S.

“…The interaction between prenatal environments and postnatal environments is an important source of phenotypic variability. We examined the ability of prenatal…”
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Proximity to multiple foraging habitats enhances seabirds’ resilience to local food shortages by Paredes, Rosana, Harding, Ann M. A., Irons, David B., Roby, Daniel D., Suryan, Robert M., Orben, Rachael A., Renner, Heather, Young, Rebecca, Kitaysky, Alexander

“…As central-place foragers, seabirds from colonies located close to multiple and/or productive marine habitats might experience increased foraging opportunities…”
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Stress hormones link food availability and population processes in seabirds by Kitaysky, AS, Piatt, JF, Wingfield, JC

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Impacts of experimentally increased foraging effort on the family: offspring sex matters by Harding, A.M.A., Kitaysky, A.S., Hamer, K.C., Hall, M.E., Welcker, J., Talbot, S.L., Karnovsky, N.J., Gabrielsen, G.W., Grémillet, D.

“…We examined how short-term impacts of experimentally increased foraging effort by one parent reverberate around the family in a monomorphic seabird (little…”
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Inter-colony comparison of diving behavior of an Arctic top predator: implications for warming in the Greenland Sea by Karnovsky, Nina J., Brown, Zachary W., Welcker, Jorg, Harding, Ann M. A., Walkusz, Wojciech, Cavalcanti, Andre, Hardin, Johanna, Kitaysky, Alexander, Gabrielsen, Geir, Grémillet, David

“…The goal of this study was to assess how diverse oceanographic conditions and prey communities affect the foraging behavior of little auksAlle alle. The…”
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mtDNA haplotypes differ in their probability of being eliminated by a mass die-off in an abundant seabird by Drovetski, S V, Kitaysky, A S, Mode, N A, Zink, R M, Iqbal, U, Barger, C

“…In this study, we take advantage of a natural experiment--a 2004 mass die-off of the Common Murre in Alaska to determine whether closely related mtDNA…”
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Dietary restriction causes chronic elevation of corticosterone and enhances stress response in red-legged kittiwake chicks by Kitaysky, A S, Kitaiskaia, E V, Wingfield, J C, Piatt, J F

“…Release of corticosterone in hungry kittiwake chicks facilitates begging and allows them to restore depleted energy reserves by increasing parental food…”
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The adrenocortical stress-response of Black-legged Kittiwake chicks in relation to dietary restrictions by Kitaysky, A. S., Piatt, J. F., Wingfield, J. C., Romano, M.

“…In this study we examined hormonal responses of Black-legged Kittiwake (Rissa tridactyla) chicks to experimental variations in energy content and nutritional…”
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Resource allocation in breeding seabirds: responses to fluctuations in their food supply by Kitaysky, Alexander S., Hunt, George L., Flint, Elizabeth N., Rubega, Margaret A., Decker, Mary Beth

“…In the vicinity of the Pribilof Islands in the Bering Sea, abundance of food available to surface-foraging seabirds was greater during the chick-rearing period…”
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Variability in trophic level and habitat use in response to environmental forcing: isotopic niche dynamics of breeding seabirds in the southeastern Bering Sea by Will, Alexis P., Kitaysky, Alexander S.

“…Climate-driven changes in the marine environment may affect inter- and intraspecific resource partitioning by marine organisms. When and how resources are…”
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Individual variation in plasma estradiol-17β and androgen levels during egg formation in the European starling Sturnus vulgaris: implications for regulation of yolk steroids by Williams, T.D., Kitaysky, A.S., Vézina, F.

“…While it is clear that maternal transfer of steroids to egg yolk can have significant effects on offspring phenotype, an unresolved question is whether females…”
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