The NMFS Alaska Fisheries Science Center National Marine Mammal Laboratory (NMML) Marine Mammal Osteology Collection consists of approximately 2500 specimens (skulls and post-cranial skeletons) from 43 species of marine mammals from around the world. Specimens have been collected for life history studies over the past 60 years on projects ranging from pelagic sealing in the 1950s, to collections of marine mammals taken incidentally in commercial fisheries, and those found dead on beaches and rookeries from Alaska to the Antarctic. The NMML Osteology Collection also houses vast numbers of teeth, primarily from northern fur seals taken during the commercial and subsistence harvests on the Pribilof Islands, Steller sea lions taken incidentally in the Alaska fisheries, and sperm whales collected from Pacific coast whaling stations in the 1950s and 60s. The majority of these teeth were initially collected for aging, but many have been used in recent years in stable isotope, nursing and growth layer\growth index studies. This database is an inventory of specimens and associated data contained within the osteological collection.

NOAA Fisheries Alaska Regional Office and Alaska Fisheries Science Center's Auke Bay Laboratories designed the Nearshore Fish Atlas of Alaska (NFA) to provide access to available data on the distribution, relative abundance, and habitat use of nearshore fishes in Alaska. The NFA is a spatially explicit, unified database of numerous nearshore catch datasets collected by various agencies and organizations in Alaska over the past several decades. The compiled datasets are from dozens of studies with different objectives and gear types (e.g., beach seines, purse seines, and trawls). The online NFA application has spatial and tabular tools for extensive searching, filtering, and downloading fully attributed data.

This data set contains food habits determined from stomachs of northern fur seals collected from pelagic waters during 1981-1985. Prey items were identified using hard parts including bones, otoliths, and cephalopod beaks.

This data package contains one table with morphometric and diet information for "non-die-off" seabirds captured and collected in southcentral and southwest Alaska. Data pertains to birds captured (live) or collected (lethally) including, bird identification numbers, sampling dates, geographic locations, body measurements, diets (from either stomach contents or regurgitated prey), and sex and age of the bird when discernible. Common Murres (Uria aalge) and Black-legged Kittiwakes (Rissa tridactyla) were captured from their breeding colonies in lower Cook Inlet, Alaska, 2016-2023. Kittiwakes, murres, Glaucous-winged Gulls (Larus glaucescens) and Horned Puffins (Fratercula corniculata) were collected in Prince William Sound, Cook Inlet, and Unalaska.

This data package contains one table with morphometric and diet information for "non-die-off" seabirds captured and collected in southcentral and southwest Alaska. Data pertains to birds captured (live) or collected (lethally) including, bird identification numbers, sampling dates, geographic locations, body measurements, diets (from either stomach contents or regurgitated prey), and sex and age of the bird when discernible. Common Murres (Uria aalge) and Black-legged Kittiwakes (Rissa tridactyla) were captured from their breeding colonies in lower Cook Inlet, Alaska, 2016-2023. Kittiwakes, murres, Glaucous-winged Gulls (Larus glaucescens) and Horned Puffins (Fratercula corniculata) were collected in Prince William Sound, Cook Inlet, and Unalaska.

Diel epipelagic sampling for juvenile Pacific salmon (Oncorhynchus spp.), rockfish (Sebastes spp.), sablefish (Anoplopoma fimbria), and associated species was conducted in order to identify factors that may affect year-class success of these commercially important species. Sampling occurred in offshore marine habitats of the coastal northeast Pacific Ocean from 10-20 August 2005 and was conducted with a surface trawl fishing the upper 20 m of the water column along transects up to78 km offshore near 58 N. Three habitats were sampled along each transect over a 24-hr period: the continental shelf (<200 m depth), the continental slope (400-750 m depth), and the abyss (>2,000 m depth). A total of 38,747 fish and squid representing 24 species were sampled in 56 trawl hauls. Of the targeted juvenile fish species, a total of 587 salmon, 11 rockfish, and 70 sablefish were captured. Sampling during day (1500-1900) and night (2200-0200) periods indicated that biomass of fish and squid was 2-4 times higher at night at (each?)all habitat types pooled across transects. No distinct patterns between day or night occurrence were noted for juvenile pink salmon (O. gorbuscha), chum salmon (O. keta), sockeye salmon (O. nerka), or coho salmon (O. kisutch), however, juvenile Chinook salmon (O. tshawytscha) were encountered only at night. Catches of juvenile rockfish and juvenile sablefish were quite low in this study, and larger sample sizes of these fish are needed to adequately determine their diel distribution. Diel differences were apparent with forage species such as Pacific herring (Clupea pallasi), capelin (Mallotus villosus), and eulachon (Thaleichthys pacificus) that were almost exclusively sampled at night. The offshore distribution patterns of target species were distinctly different, with the most common occurrences of juvenile salmon over continental shelf habitats, juvenile sablefish over continental shelf and slope habitats, and juvenile rockfish over slope and abyss habitats. Pacific herring, capelin, eulachon, and Pacific sardines (Sardinops sagax) were found over continental shelf habitats, whereas small squid and myctophids occurred primarily at slope and abyssal habitats. The greatest overall catch biomass was of gelatinous species (jellyfish), which was consistently higher than that of all fish and squid combined, usually by an order of magnitude. Individual fish or squid species with highest average weight per haul were pomfret (Brama japonica), adult coho salmon, Humboldt squid (Dosidicus gigas), and blue sharks (Prionace glauca). The occurrence of the latter two warm-water species and Pacific sardines were of interest because this study occurred during an anomalously warm year and the capture of Pacific sardines and Humboldt squid represent northern range extensions for these species. Stomach content analysis of potential predator species of the target species showed that only adult coho salmon were predating on juvenile salmon and sablefish, and only pomfret were predating on juvenile rockfish. Further sampling of the target species is needed in these habitats during more normal environmental conditions to validate these observations.

This database contains counts of adult and juvenile (non-pup) Steller sea lions on rookeries and haulouts in Alaska made between 1904 and 2019. Non-pup counts have been conducted throughout the year. Breeding season (June-mid July) non-pup counts are used for population trend analysis, while counts at other times are used for analyses of distribution and for other purposes. Non-pups are counted from the ground (by walking along the rookery), from cliff-side overlooks, and from aerial imagery (oblique and vertical orientation). Non-pup counts represent only a fraction of the total number of animals that may use a site. Sea lions haul-out less frequently in winter than in summer; thus, winter counts represent a smaller fraction of the total population than summer counts.

This dataset contains a summary of available information about 150 Pacific walrus haulouts. The data were compiled from available reports (published and unpublished), interviews with coastal residents and aviators, and the personal observations of the authors. Each record provides summary characteristics, including: location information, maximum haulout size, age-sex composition, season of use, and decade of most recent use. Bibliographic citations to reports are provided in an additional file. Background information about this database is available in a companion publication (USGS Open-File Report 2016-1108): https://doi.org/10.3133/ofr20161108

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This database contains counts of Steller sea lion pups on rookeries in Alaska made between 1961 and 2019. Pup counts are conducted in June-July. Pups are counted from the ground (by walking along the rookery), from cliff-side overlooks, and from aerial images (vertical orientation). Pup counts conducted in late June-mid July are considered to represent a complete census of pups produced at each site during the year.