A5055089440- Avian ecology and behavior
- Arctic and Antarctic ice dynamics
- Marine animal studies overview
- Fish Ecology and Management Studies
- Climate variability and models
- Species Distribution and Climate Change
- Cryospheric studies and observations
- Marine and fisheries research
- Isotope Analysis in Ecology
- Arctic and Russian Policy Studies
- Marine and coastal plant biology
- Marine Bivalve and Aquaculture Studies
- Identification and Quantification in Food
- Wildlife Ecology and Conservation
- Climate change and permafrost
- Genetic diversity and population structure
- Ecology and biodiversity studies
- Indigenous Studies and Ecology
- Rangeland and Wildlife Management
- Genetic and phenotypic traits in livestock
- Geology and Paleoclimatology Research
- Ocean Acidification Effects and Responses
- Oil Spill Detection and Mitigation
- Animal Behavior and Reproduction
- Geological Studies and Exploration
Arctic Research Centre
2019
University of Alaska Fairbanks
1988-2018
Friends United
2015-2017
College of the Atlantic
1984
Alaska Department of Fish and Game
1976
Michigan State University
1971
Telomeres are highly conserved regions of DNA that protect the ends linear chromosomes. The loss telomeres can signal an irreversible change to a cell's state, including cellular senescence. Senescent cells no longer divide and damage nearby healthy cells, thus potentially placing them at crossroads cancer ageing. While epidemiology, molecular biology well studied, newer field exploring telomere in context ecology evolution is just emerging. With work date focusing on how shortening relates...
Studies of the body condition five marine vertebrate predators in Beaufort Sea, conducted independently during past 2–4 decades, suggest each has been affected by biophysical changes ecosystem. We summarize a temporal trend increasing two species (bowhead whale subadults, Arctic char), both cases influenced extent and persistence annual sea ice. Three other (ringed seal, beluga, black guillemot chicks), consumers with dietary preference for cod, experienced declines condition, growth and/or...
Arctic cod (Boreogadus saida) is the most abundant forage fish in Ocean. Here we review habitats, distribution, ecology, and physiology to assess how climate change other anthropogenic stressors are affecting this key species. This identifies vulnerabilities for different life stages across entire distribution range of cod. We explore impact environmental (abiotic biotic) on with a regional perspective scenario up year 2050 identify knowledge gaps constraining predictions. Epipelagic eggs...
Abstract Linkages between atmospheric, ecological, and biogeochemical variables in the changing Arctic are analyzed using long-term measurements near Utqiaġvik (formerly Barrow), Alaska. Two key date when snow disappears spring, as determined primarily by atmospheric dynamics, precipitation, air temperature, winter accumulation, cloud cover, of onset snowpack autumn that is additionally influenced ocean temperature sea ice extent. In 2015 2016 melted early at owing mainly to anomalous warmth...
Abstract Phenological adjustments are an important aspect of a population's response to climate change. Changes in phenology can occur through either individual plasticity or evolutionary change within populations. Few studies have investigated both these processes Arctic environments. Using 42 years and pedigree data, we evaluated the contribution evolution variation breeding at colony high sea‐ice obligate seabird, Mandt's black guillemot ( Cepphus grylle mandtii ). Mean clutch initiation...
Although Arctic cod (Boreogadus saida) is widely recognized as an important trophic link to top predators in marine ecosystems, the challenges of conducting fieldwork make this species difficult study. We establish some basic relationships improve prey energetics modeling when only in-field parameters (e.g., fork length) can be measured. investigated intraspecific among energy density, length, mass, and water content for captured by Black Guillemots Thick-billed Murres at two sites (Western...
Mandt's black guillemot ( Cepphus grylle mandtii ) is one of the few seabirds associated in all seasons with Arctic sea ice, a habitat that changing rapidly. Recent decreases summer ice have reduced breeding success and colony size this species Alaska. Little known about species' movements distribution during nine month non-breeding period (September–May), when changes extent composition are also occurring predicted to continue. To examine bird seasonal role guillemots, we deployed recovered...
Abstract Polar bears ( Ursus maritimus ) from the southern Beaufort Sea (SB) subpopulation have traditionally fed predominantly upon ice‐seals; however, as proportion of using onshore habitat has recently increased, foraging on land‐based resources, including remains subsistence‐harvested bowhead whales Balaena mysticetus and colonial nesting seabirds been observed. Adipose tissue samples were collected this during springs 2013–2016 analyzed for fatty acid signatures. Diet estimates...
Journal Article The Pelagic Feeding Habits of Ivory and Ross' Gulls Get access George J. Divoky Alaska Department Fish Game, 1300 College Road, Fairbanks, 99701 Search for other works by this author on: Oxford Academic Google Scholar Condor, Volume 78, Issue 1, 1 January 1976, Pages 85–90, https://doi.org/10.2307/1366919 Published: 01 1976 history Accepted: 27 May 1975
Birds migrating along the flaw lead at Point Barrow, Alaska were observed from 6 May to 4 June 1976. Little migration occurred until 25 and 26 May, when winds shifted northeasterly southwesterly widened lead. King Eiders (Somateria spectabilis) most abundant migrant; their movements greatest with (following) between 1200 1800 h (Alaska Daylight Savings Time). On 360,000 passed within a 10-hour period. Ninety percent of migrant Glaucous Gulls (Larus hyperboreus) moved east by May. Common...
Journal Article Breeding of the Black Guillemot in Northern Alaska Get access George J. Divoky, Divoky Search for other works by this author on: Oxford Academic Google Scholar E. Watson, Watson National Museum Natural History Smithsonian Institution Washington, D.C. 20560 James C. Bartonek Bureau Sport Fisheries and Wildlife 1412 Airport Way Fairbanks, 99701 The Condor, Volume 76, Issue 3, 1 July 1974, Pages 339–343, https://doi.org/10.2307/1366350 Published: 01 1974 history Accepted: 28 June 1973
Abstract The Arctic has experienced greatly decreased sea ice and increased ocean temperatures in recent decades but there is a paucity of biological time‐series data allowing assessment resulting temporal variation the region's marine ecosystems. Seabirds, as highly mobile visible, upper trophic‐level predators, can be valuable monitors modifications ecosystems, especially for regions lacking commercial fisheries or regular oceanographic sampling. Since 1975, we have studied annually an...
Journal Article Distribution and Subspecies of the Dovekie in Alaska Get access Robert H. Day, Day Institute Marine Sciences, 200 O'Neill Building, University Alaska, Fairbanks, AK 99775 Search for other works by this author on: Oxford Academic Google Scholar Anthony R. DeGange, DeGange U.S. Fish Wildlife Service, Research Center, 1011 East Tudor Road, Anchorage, 99503 George J. Divoky, Divoky Arctic Biology, 211 Irving Declan M. Troy LGL Associates, 505 West Northern Lights Boulevard-Suite...