Soviet trawl surveys and exploratory fishing expeditions off Alaska from 1950s to 1977. Data include CPUE by species, length-weight data, and species composition.

Stratified Random Sampling - (annual surveys of portions of the slope - complete slope surveyed over a 4-yr period)Geographic Area: Continental slope off Washington, Oregon, and California. From 38 deg N to US/Canada border.A TCODE project

Catch quantity and composition from sampling conducted aboard commercial fishing vessels (US and foreign) in the EEZ off Alaska Observers sample aboard all vessels greater than 60' LOA fishing Groundfish within the EEZ off Alaska. Set-by-set data is not generally available for reasons of confidentiality. Data aggregated into ﾽ degree lat by 1 degree long generally available upon request US EEZ off Alaska. Some data also collected during commercial fisheries for pacific hake off Washington and Oregon A TCODE project

Catch numbers for standardized longline gear at index sites. Measurement Details Catch numbers (plus size and sex composition for commercially important species and some age data for sablefish) captured with standardized longline gear at index sites. Random sampling Geographic Area Gulf of Alaska (1987-present); Aleutian Is (1996) Publication various publications available from the Alaska Fisheries Science Center, Seattle, WA, WA A TCODE project

The analytical approach for simulating current groundfish management in the North Pacific U.S. EEZ involves considering interactions among a large number of species (including target, non-target, and prohibited), areas, and gear types. Modeling was used to predict the likely outcome of management decisions using statistics on historical catch of different species by gear types and areas. The model outputs biomass of managed fish species. [ Reference: PICES Scientific Report No. 18 2001, Proceedings of the PICES/CoML/IPRC Workshop on "Impact of Climate Variability on Observation and Prediction of Ecosystem and Biodiversity Changes in the North Pacific", http://www.pices.int/publications/scientific_reports/Report18/default.aspx. ]

The Department of Ichthyology houses one of the largest research collections of its kind in the world. There are approximately 200,000 lots (jars) containing roughly 2 million specimens. 190,000 of those lots are cataloged. There are representatives of 14,000 fish species in this collection, which is about half of those known to science.Although the initial preservation is done in formaldehyde, the specimens are stored in alcohol. The bulk of the collection is in 75% ethanol, while our large vats are filled with 55% isopropanol.Contact Jon Fong (jfong@calacademy.org) or Dave Catania (dcatania@calacademy.org) for data. Data are generally available only for non-profit scientific use. Please be as specific as possible, including what criteria to search for, what data fields you require, and what format you'd like the data in.Contact Dave Catania to request loans of specimens. Loans are generally made only for non-profit scientific research. Please state exactly what material you are interested in, preferably by catalog number, and the type of material you would like. We loan wet specimens, skeletal material, cleared& stained specimens, radiographs, etc. Also please state the project for which the material is intended, using either your institutional letterhead or e-mail address. No dissections, clearing and staining, or tissue sampling may be done without prior permission. Loans to students must be made to their advisors who must assume responsibility for the materials.

The Bering Sea supports the largest flatfish fishery in the United States. Productivity in this region is important to the U.S. economy; fisheries from the region constitute 10-40% of the U.S. fisheries harvest. Bottom trawling for flatfish has been common in the Bering Sea since the early 1950s when foreign fishing vessels overexploited yellowfin sole stocks. Mobile fishing gear has recently become the focus of international attention as managers fear habitat degradation, loss of biological diversity and the subsequent consequences to fishery resources. The Magnuson-Stevens Fishery Conservation and Management Act (MSFCMA) requires the identification and description of Essential Fish Habitat (EFH) for each commercially fished species and any adverse impacts that may affect EFH. However, a paucity of knowledge on trawl impacts on the eastern Bering Sea shelf currently impedes resource managers' ability to address the requirements of the MSFCMA and make informed decisions in this region. In collaboration with the Alaska Fisheries Science Center of the U.S. National Marine Fisheries Service, and the Groundfish Forum, we will determine if there are measurable impacts of commercial flatfish trawling on EFH of the eastern Bering Sea shelf. Our objectives are to 1) compare physical and biological variables between trawled areas and closures to determine chronic impacts 2) conduct experimental trawling in selected closures to determine acute trawling impacts by comparing physical and biological variables 3) determine the severity of trawl impacts compared to natural variation at different depths and substrates across the eastern Bering Sea shelf. This project also includes; Sue Hills, University of Alaska Fairbanks, P.O. Box 757220, Fairbanks, Alaska 99775-7220, (907) 474-7724, shills@ims.uaf.edu An NPMR project

Ichthyology Primary Types Imagebase database contains three categories of images: color photographs, radiographs, and original illustrations. In the case of syntypes, a single specimen is selected to represent the syntypic series. This is true even when the series is distributed in several discreet lots. The selection is based primarily on appearance for photography, so these may not be the best specimens for taxonomic purposes, and in some cases, may only represent one of two or more taxa actually present in the series. The project is essentially complete, although new images will be posted as old types are returned and new types are deposited here.Direct any questions, comments, or corrections to David Catania (dcatania@calacademy.org), Sr. Collection Manager, Dept. of Ichthyology.

The diets of commercially important Groundfish species in the waters surrounding the Aleutian Islands during the summer of 1991 were studied. Important prey types, predator-prey size relationships, and prey distribution are discussed in detail.

Time series of commercially important groundfish species fishery sales slips in the British Columbia between 1950 and 1996. [ Reference: PICES Scientific Report No. 18 2001, Proceedings of the PICES/CoML/IPRC Workshop on "Impact of Climate Variability on Observation and Prediction of Ecosystem and Biodiversity Changes in the North Pacific", http://www.pices.int/publications/scientific_reports/Report18/default.aspx. ]