Article
Oceanography
Sharon Wildes, Jackie Whittle, Hanhvan Nguyen, Maxwell Marsh, Kirby Karpan, Catherine 'Amelio, Andrew Dimond, Kristin Cieciel, Alex De Robertis, Robert Levine, Wes Larson, Jeff Guyon
Summary: This study used genetic techniques to identify cods in the Pacific Arctic and found evidence of distributional shifts and range expansions of cod species in response to changing climactic conditions, with cod and Arctic Cod moving northward during warmer conditions. The study also detected juvenile Arctic Cod in the Chukchi Sea, where they are not typically found.
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2022)
Article
Engineering, Marine
Lauren Divine, Megan J. Peterson Williams, Jeremy Davies, Michael LeVine, Bruce Robson
Summary: Indigenous communities on the Pribilof Islands have concerns about the decline in northern fur seal (NFS) abundance, with research highlighting nutritional limitation as a key factor. The study emphasizes the importance of integrating Indigenous and Local Knowledge with western science to understand ecosystem interactions, and suggests combining Indigenous and Local Knowledge-based approaches with spatiotemporal management to mitigate NFS decline.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Review
Oceanography
Benjamin J. Laurel, Mary E. Hunsicker, Lorenzo Ciannelli, Thomas P. Hurst, Janet Duffy-Anderson, Robert O'Malley, Michael Behrenfeld
Summary: This study combined experimental data and satellite remote-sensing estimates to predict habitat quality for Pacific cod larvae in two marine ecosystems. The results showed that the drivers of a mismatch between cod larvae and their food differed fundamentally between the two systems.
PROGRESS IN OCEANOGRAPHY
(2021)
Review
Oceanography
Arnaud Gruss, James T. Thorson, Christine C. Stawitz, Jonathan C. P. Reum, Sean K. Rohan, Cheryl L. Barnes
Summary: By applying EOF analysis to examine fish demographic processes in the eastern Bering Sea, the study found a strong correlation between prey-biomass-per-predator-mass and the spatial extent of bottom temperatures (CPE), indicating a bottom-up environmental influence on demographic processes. Anomalous years, such as 1999 and 2010 with a large CPE and high indices for demographic variables, as well as 2016-2019 with a small CPE and low indices, were identified. These findings suggest the potential for using CPE projections to forecast changes in demographic process variables in the future.
PROGRESS IN OCEANOGRAPHY
(2021)
Article
Biodiversity Conservation
K. K. Burnham, F. K. Meyer, J. L. Burnham, M. Chumchal, J. A. Johnson
Summary: Research shows that mercury levels in Arctic seabird eggs have increased significantly over the past century, with eggs in northwest Greenland having particularly high concentrations. This suggests that some seabird eggs may be at risk of embryonic mortality.
Article
Fisheries
Martin W. Dorn, Cheryl L. Barnes
Summary: Predation, although highly variable, remains the greatest source of mortality for juvenile and lower trophic-level fishes, with substantial and long-term effects on prey dynamics. By estimating time-varying predation mortality, the study aims to understand its effects on the population dynamics of pollock in a system dominated by upper trophic-level predators.
FISHERIES RESEARCH
(2022)
Article
Fisheries
Duane E. Stevenson, Stan Kotwicki, James T. Thorson, Giancarlo M. Correa, Troy Buckley
Summary: This study examines the influence of environmental conditions, intrinsic properties of populations, and prior distribution on the spatial distributions of marine fish populations. It identifies age-specific factors and population cohort effects as important drivers of spatial distribution.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Fisheries
Krista B. Oke, Franz Mueter, Michael A. Litzow
Summary: This study used fisheries-independent data to test the effects of climate on body size of eastern Bering Sea walleye pollock. The results showed that higher temperatures led to increased weight for young age classes but decreased weight for old age classes. This finding has important implications for pollock management and the Bering Sea pollock fishery.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Oceanography
Olga A. Maznikova, Pavel O. Emelin, Artem Yu Sheibak, Mikhail A. Nosov, Alexei M. Orlov
Summary: Based on trawl surveys conducted by Russian research vessels, this study presents data on the distribution and behavior of walleye pollock in the western Chukchi Sea. The distribution of walleye pollock is influenced by water temperature, and different size groups are found in different areas and depths. The recent increase in pollock abundance is attributed to various factors including warming temperatures, decreasing ice cover, and increasing abundance in the Bering Sea. Commercial fishing in the western Chukchi Sea is not sustainable due to uncertainties in stock population, harsh climatic conditions, and logistical challenges.
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2023)
Article
Ecology
Shannon Whelan, Scott A. Hatch, Anthony J. Gaston, H. Grant Gilchrist, Kyle H. Elliott
Summary: The magnitude of climate change and wildlife responses in the Arctic vary due to the relative importance of phenotypic plasticity or phenotypic selection. This study examines and contrasts the environmental drivers of plasticity in breeding phenology of two circumpolar seabirds and predicts opposing patterns of plasticity based on local ecosystems. The findings suggest that both populations adjust breeding phenology to environmental variation, but the effects on phenology with continued climate change may be different.
FUNCTIONAL ECOLOGY
(2022)
Article
Zoology
Flemming Ravn Merkel, Jannie Fries Linnebjerg, Ole Gorm Norden Andersen, Nicholas Per Huffeldt, Teunis Jansen, Rasmus Hedeholm, Morten Frederiksen
Summary: The study compared murre diets collected in the 1990s and 2010s around Nuuk, Greenland, finding a decrease in the contribution of fish and an increase in the importance of M. norvegica in crustaceans in the 2010s. This shift may be linked to the warming sub-Arctic region and potentially deteriorating winter conditions for murres.
CANADIAN JOURNAL OF ZOOLOGY
(2021)
Article
Fisheries
Adam Spear, Alexander G. G. Andrews III, Janet Duffy-Anderson, Tayler Jarvis, David Kimmel, Denise McKelvey
Summary: The study analyzed data from different temperature years and found that the vertical distribution of age-0 pollock is related to ocean temperature changes. In colder years, age-0 pollock was found in deeper water columns, while in warmer years, they were surface-oriented. This may affect spatial matching between pollock and prey, and impact the feeding environment and bioenergetic condition of age-0 pollock.
FISHERIES OCEANOGRAPHY
(2023)
Article
Fisheries
Jesse F. Lamb, David G. Kimmel
Summary: A survey-based time series from 2001 to 2019 revealed that age-0 walleye pollock had high abundances in 2013, but their recruitment to age-1 was lower than average. The study found that fish in the southwest region consumed more low-quality food, while fish in the northwest region primarily consumed higher quality prey. These results suggest that the diet composition of prey may impact overwinter survival and mortality of walleye pollock.
FISHERIES OCEANOGRAPHY
(2021)
Article
Oceanography
Olga R. Emelianova, Oleg A. Bulatov, Igor V. Grigorov, Alexei M. Orlov, Svetlana Yu Orlova
Summary: The results of genetic analysis on walleye pollock from the Chukchi Sea reveal no significant difference between the populations in the Chukchi Sea and the Bering Sea, but a significant difference with the Sea of Okhotsk. This suggests genetic exchange through mixing of genetic material from different spawning grounds and migrations of adult fish.
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Benjamin C. Williams, Keith R. Criddle, Gordon H. Kruse
Summary: The management of fish stocks across different jurisdictions is crucial for maintaining their abundance and distribution, but legal constraints and differing management objectives often hinder coordinated decision-making.
NATURAL RESOURCE MODELING
(2021)
Article
Oceanography
Jason A. Law, Robert H. Weisberg, Yonggang Liu, Dennis A. Mayer, Jeffrey C. Donovan
Summary: Time series data from a moored array of sensors are used to describe the long-term mean circulation and seasonal variations on the West Florida Continental Shelf. The observations reveal a coherent shelf-wide circulation pattern with alongshore and down-coast flow, and a coastal jet separating an upwelling region from a downwelling region influenced by the deeper ocean.
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2024)