The eastern Aleutian prehistoric archaeological sequence is key for understanding population movements, cultural exchanges, and adaptations to environmental changes over a wide area of the north Pacific and Bering Sea during the Holocene. An important question is, Can the settlement history of the eastern Aleutians be understood as a single continuous tradition lasting some 9,000 years, or were there major population and cultural influxes along with periods of widespread population abandonment? We review the available archaeological evidence with reference to recent mtDNA and nucleic DNA studies of prehistoric and contemporary Arctic and Subarctic populations and conclude that the evidence points to an overall cultural continuity with notable incursions and excursions of people and cultural elements into and out of the eastern Aleutians.
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http://dx.doi.org/10.3378/027.082.0503 | DOI Listing |
Evol Appl
January 2025
National Oceanographic and Atmospheric Administration, National Marine Fisheries Service Alaska Fisheries Science Center, Auke Bay Laboratories Juneau Alaska USA.
High-latitude ocean basins are the most productive on earth, supporting high diversity and biomass of economically and socially important species. A long tradition of responsible fisheries management has sustained these species for generations, but modern threats from climate change, habitat loss, and new fishing technologies threaten their ecosystems and the human communities that depend on them. Among these species, Alaska's most charismatic megafaunal invertebrate, the red king crab, faces all three of these threats and has declined substantially in many parts of its distribution.
View Article and Find Full Text PDFModels of migratory behavior predict trade-offs between fitness costs and benefits with respect to migration distance. Shorter migration distances may confer a fitness benefit by facilitating earlier breeding, however this is rarely investigated. We tested this hypothesis using a large-scale geolocation (GLS) dataset from 109 rhinoceros auklets (), a differentially migrating seabird, that was tagged at 12 breeding colonies along the Pacific Coast of North America, spanning southern California to the eastern Aleutian Islands, Alaska.
View Article and Find Full Text PDFConserv Physiol
November 2023
Institute of Northern Engineering, University of Alaska Fairbanks, 1764 Tanana Loop, Fairbanks, Alaska 99775, USA.
Geographic differences in population growth trends are well-documented in Steller sea lions (), a species of North Pacific pinniped listed under the U.S. Endangered Species Act in 1990 following a marked decline in population abundance that began during the 1970s.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
July 2023
Department of Physics, Imperial College London, London SW7 2AZ, United Kingdom.
Since the beginning of the satellite era, Southern Ocean sea surface temperatures (SSTs) have cooled, despite global warming. While observed Southern Ocean cooling has previously been reported to have minimal impact on the tropical Pacific, the efficiency of this teleconnection has recently shown to be mediated by subtropical cloud feedbacks that are highly model-dependent. Here, we conduct a coupled model intercomparison of paired ensemble simulations under historical radiative forcing: one with freely evolving SSTs and the other with Southern Ocean SST anomalies constrained to follow observations.
View Article and Find Full Text PDFAnimals (Basel)
December 2022
Laboratory of Oceanic Ichthyofauna, Shirshov Institute of Oceanology, Russian Academy of Sciences, 117997 Moscow, Russia.
The results of long-term (1948-2021) studies on the spatial and vertical distribution, dynamics of abundance, and size composition of the Aleutian skate in the North Pacific Ocean are presented. Maximum densities of this species were characteristic of the eastern Bering Sea slope, off the central Aleutian Islands, consisting of the Pacific waters off southeastern Kamchatka and the northern Kurils, and northeastern Sakhalin. This species was most abundant at depths of 100-600 m; in the cold months, migrates to greater depths for over-wintering, and in warm months it feeds at shallower depths.
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