This data is from an experiment designed to test the viability of using hatchery reared crab to supplement wild stocks and to determine the optimal density for future releases. Crab were released by divers into 5 x 5 m quadrats marked with ground line at three densities: 25, 50, and 75 m-2. Researchers monitored the crab density inside the plots, in order to estimate survival, as well as outside the plots, to estimate crab movement. In addition, they determined predator densities and performed tethering experiments on red king crab to see if predator density or predation risk differed among the density treatments.

Aerial surveys were conducted during 1983–2006 in the Ketchikan, Sitka, Kodiak, and Bristol Bay areas of Alaska to estimate trends in abundance of harbor seals.

Allozyme variation was used to examine population genetic structure of adult chinook salmon, Oncorhynchus tshawytscha, collected between 1988 and 1993 from 22 spawning locations in Southeast Alaska and northern British Columbia. Thirty-five loci and two pairs of isoloci were variable, and of these, 25 loci and one pair of isoloci expressed the most abundant allele with a frequency of less than or equal to 0.95 in at least one collection. Aneighbor-joining (NJ) tree of genetic distances defined five regional groups: (1) King Salmon River (the only island collection), which has large allelic frequency differences from other populations in this study; (2) heterogeneous coastal populations from southern southeast Alaska; (3) transmountain collections from the Taku and Stikine Rivers on the eastern side of the coastal mountain range; (4) Chilkat River in northern Southeast Alaska; and (5) northern coastal Southeast Alaska, which consists of the Situk River and the Klukshu River, a tributary of the Alsek River. A second NJ tree that included collections from the Yukon River and British Columbia did not reveal any strong genetic similarity between Southeast Alaska and the Yukon River. The data suggest that Southeast Alaska may have been colonized from both northern and southern refugia following the last glaciation b?? a period of sufficient time to allow for isolation by distance to occur.

Groundfish catch and effort data (excluding flatfishes and rockfishes) collected by observers in the United States commercial groundfish fisheries of Alaska (Bering Sea, Aleutian Islands and Gulf of Alaska, 1993-2017.
Subset of the Alaska observer groundfish data, aggregating by 400km square cells and eliminating cells with less than three vessels to create a public version of the Alaska groundfish observer data.
Purpose: Allows visitors use of the aggregated observer data to create maps. These maps are designed to provide a better understanding of where groundfish are caught in the Aleutian Islands, Bering Sea and Gulf of Alaska.
Supplemental_Information: http://www.afsc.noaa.gov/FMA/fma_database.htm
Number 3 of a set of 5 files:
1. AFSC/FMA: North Pacific Groundfish and Halibut Observer Program Fishery Statistics - Rockfish Catch
2. AFSC/FMA: North Pacific Groundfish and Halibut Observer Program Fishery Statistics - Flatfish Catch
3. AFSC/FMA: North Pacific Groundfish and Halibut Observer Program Fishery Statistics - Most fishes (excluding flatfishes and rockfishes) Catch
4. AFSC/FMA: North Pacific Groundfish and Halibut Observer Program Fishery Statistics - Invertebrates Catch
5. AFSC/FMA: North Pacific Groundfish and Halibut Observer Program Fishery Statistics - Effort Statistics

The data from this study, describes embryo development in Golden king crab, Lithodes aequispinus. Six female multiparous golden king crab were captured from the Aleutian Islands, Alaska, and mated in the laboratory. Their embryos were photographed and staged on average once every 9 days throughout embryogenesis.

The core function of the Resource Assessment and Conservation Engineering (RACE) Division is to conduct quantitative fishery surveys and related ecological and oceanographic research to measure and describe the distribution and abundance of commercially important fish and crab stocks in the eastern Bering Sea, Aleutian Islands, Gulf of Alaska, and, historically, the West Coast.The survey data are stored in a database called RACEBASE. It serves as the repository for both raw and summary data collected from the surveys dating from 1953 to present. It does not hold stream data.

Maternal effects on the quality of progeny can have direct impacts on population productivity. Rockfish are viviparous and the oil globule size of larvae at parturition has been shown to have direct effects on time until starvation and growth rate. We sampled embryos and preparturition larvae opportunistically from 89 gravid quillback rockfish (Sebastes maliger) in Southeast Alaska. Because the developmental stage and sampling period were correlated with oil globule size, they were treated as covariates in an analysis of maternal age, length, and weight effects on oil globule size. Maternal factors were related to developmental timing for almost all sampling periods, indicating that older, longer, and heavier females develop embryos earlier than younger, shorter, or lighter ones. Oil globule diameter and maternal length and weight were statistically linked, but the relationships may not be biologically significant. Weight-specific fecundity did not increase with maternal size or age, suggesting that reproductive output does not increase more quickly as fish age and grow. Age or size truncation of a rockfish population, in which timing of parturition is related to age and size, could result in a shorter parturition season. This shortening of the parturition season could make the population vulnerable to f luctuating environmental conditions.

The core function of the Resource Assessment and Conservation Engineering (RACE) Division is to conduct quantitative fishery surveys and related ecological and oceanographic research to measure and describe the distribution and abundance of commercially important fish and crab stocks in the eastern Bering Sea, Aleutian Islands, Gulf of Alaska, and, historically, the West Coast.The survey data are stored in a database called RACEBASE. It serves as the repository for both raw and summary data collected from the surveys dating from 1953 to present. It does not hold stream data.

This dataset is from a laboratory study that investigated the effect of temperature and tissue type on fatty acid signatures of Pacific cod and walleye pollock.

Data sets used to support analysis published by O'Corry-Crowe et al (2014) Crossing to safety: Dispersal, colonization and mate choice in evolutionarily distinct populations of Steller sea lions, Eumetopias jubatus. Molecular Ecology 23(22): 5415-5434. Data include Steller sea lion genetic data obtained from samples collected from pups on natal rookeries. The genetic data are genotypes at 16 microsatellite loci and haplotypes at mtDNA, spatial data, and allelic and haplotypic frequencies.