Alaska Department of Fish and Game, Fishery Data Series No. 12-85, Anchorage A two-event mark-recapture experiment was used to estimate the abundance of Chinook salmon Oncorhynchus tshawytscha that returned to spawn in the Unuk River in 2009. Abundance of large Chinook salmon (³660 mm MEF) was estimated to be 3,157 (SE = 354) in 2009. … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 12-79, Anchorage Snorkel surveys have been conducted annually since 1997 to monitor the spawning abundance of steelhead Oncorhynchus mykiss in 10 index streams in Southeast Alaska, and were conducted again during 2010 and 2011. These index streams were surveyed by a two- or three-person team … Continue reading
Alaska Department of Fish and Game, Fishery Data Series 12-62, Anchorage Between 2004 and 2010, the Alaska Department of Fish and Game (ADF&G) conducted biennial area-swept surveys on weathervane scallops, Patinopecten caurinus, in Kamishak Bay in lower Cook Inlet, and at Kayak Island in the Gulf of Alaska (GOA). Survey objectives were to assess the … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 12-08, Anchorage. Snorkel surveys have been conducted annually since 1997 to monitor the spawning abundance of steelhead Oncorhynchus mykiss in 10 index streams in Southeast Alaska, and were conducted again during 2008 and 2009. These index streams were surveyed by a two- or three-person team … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 12-57, Anchorage. The escapement of sockeye salmon, Oncorhynchus nerka, into the Kenai River has been estimated using a combination of sonar and fish wheels operated at rkm 31.1 since 1968. Beginning in 2011, the fisheries were managed using a dual-frequency identification sonar (DIDSON). This project … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 12-51, Anchorage The purpose of this study was to conduct a full stock assessment of Chilkat River coho salmon Oncorhynchus kisutch. Coho salmon smolt were captured in the Chilkat River during spring 2008, marked with an adipose fin clip and a coded wire tag (CWT), … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 12-43, Anchorage The purpose of this study was to conduct a full stock assessment of Chilkat River coho salmon Oncorhynchus kisutch. Coho salmon smolt were captured in the Chilkat River during spring 2007, marked with an adipose fin clip and a coded wire tag (CWT), … Continue reading
http://www.adfg.alaska.gov/FedAidpdfs/FDS12-06 A trawl survey was conducted in Norton Sound in northwest Alaska to collect and analyze information on the distribution and abundance of demersal fishes and invertebrates from July 18 through August 15, 2011, with primary focus on red king crab Paralithodes camtschaticus. Population estimates were generated using an area-swept method as calculated in previous … Continue reading
http://www.adfg.alaska.gov/FedAidpdfs/SP12-02.pdf Red king crab (Paralithodes camtschaticus, RKC) are harvested throughout the Bering Sea, and Norton Sound harbors one of the northernmost commercially harvestable stocks. Annual crab harvest levels are determined preseason using models that predict biomass of legal male RKC. This report provides an overview of crab prediction models for determining guideline harvest levels (GHL), … Continue reading
http://www.adfg.alaska.gov/FedAidpdfs/FDS12-19 The Pacific herring Clupea pallasii run in Togiak District of Bristol Bay was monitored for abundance/biomass and sampled for age, size, and sex composition in 2010. Abundance was estimated from aerial surveys with chartered aircraft. Commercial harvest was measured through landing reports filed by the commercial fish processors to the department. Samples were … Continue reading
http://www.adfg.alaska.gov/FedAidpdfs/RIR.5J.2012.01 This report summarizes research and management information gaps and projects to address those gaps for commercial, personal use, and subsistence fisheries in the State of Alaska. Projects identified in this document are currently unfunded or underfunded. If fully funded, these projects would contribute significantly to the knowledge base for the species associated with each … Continue reading
http://www.adfg.alaska.gov/FedAidpdfs/FDS12-23 In 2007, a multi-event mark–recapture experiment was conducted to estimate the abundance and length distribution of northern pike (Esox lucius) in Long Lake of the Chulitna River drainage. Radio telemetry was used to track the movements of 40 radiotagged northern pike through the spring of 2010. The estimated abundance of northern pike at least … Continue reading
http://www.adfg.alaska.gov/FedAidpdfs/FDS12-04 Two-event mark-recapture experiments were used to estimate the abundance of Chinook salmon Oncorhynchus tshawytscha that returned to spawn in the Unuk River in 2007 and 2008. Biological data were collected during both events. Each apparently healthy fish was marked with a numbered solid-core spaghetti tag sewn through its back and 2 secondary batch marks … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 10-69, Anchorage. Abundance of northern pike Esox lucius ≥450 mm FL in Volkmar Lake during 2005 and in George Lake during 2006 was estimated using two-event mark recapture experiments. The primary purpose of the studies was to compare population sizes to abundance-based management objectives for … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 10-84, Anchorage The abundance, size and age composition of Arctic grayling in the lower 23 km of the Delta Clearwater River was estimated using a two-sample mark-recapture experiment. Fish were captured by systematically fishing using hook-and-line gear in a downstream progression with the first event … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 10-46, Anchorage. The abundance of lake trout Salvelinus namaycush was estimated in Paxson Lake during 2002–2004. A series of five sampling events (fall 2002, spring 2003, fall 2003, spring 2004, and fall 2004) were fielded and produced five different two-sample mark-recapture estimates of abundance. Two … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 10-41, Anchorage The primary purpose of the study was to collect abundance information for northern pike Esox lucius ≥450 mm FL in Volkmar Lake to evaluate potential regulatory changes during the 2010 Board of Fish meeting. A minimum population size of 2,000 northern pike ≥450 … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 10-49, Anchorage Pacific razor clam Siliqua patula studies along eastern Cook Inlet were conducted from 1993 to 2003 to estimate clam digger distribution, clam harvest by beach, age and length composition of the harvest, and periodically, the abundance of clams at Ninilchik and Clam Gulch … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 10-62, Anchorage. Stock assessments of burbot Lota lota were conducted at Tanada Lake in 2007 and at adjacent Copper Lake in 2008. Burbot were captured using baited hoop traps systematically set along equally spaced transects and soaked for two nights (approximately 48 h). Sampling was … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 10-82, Anchorage. The estimated abundance of cutthroat trout ≥180 mm FL in Auke Lake, located near Juneau, Alaska, was 255 (SE = 65) in spring 2005 and 454 (SE = 101) in spring 2006; these estimates fall between the estimates made in previous years. Estimated … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 10-28, Anchorage. A stock assessment of the Goodpaster River Arctic grayling fishery was completed during 2006 using mark- recapture experiments. Objectives of the study were to estimate abundance and length and age composition in 101.4-km and 58.5-km study areas during spring and summer and to … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 10-60, Anchorage. The purpose of this study was to conduct a full stock assessment of Chilkat River coho salmon Oncorhynchus kisutch. Coho salmon smolt were captured in the Chilkat River during spring 2006, marked with an adipose finclip and a coded wire tag (CWT), and … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 11-19, Anchorage. In 2007, a capture-recapture experiment was conducted using radio tags, fish wheels, and weirs to estimate the sockeye salmon Oncorhynchus nerka escapement to the Susitna River. Radio tags were used as the mark in the abundance experiment and to identify spawning locations of … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 11-12, Anchorage. In 2008, a capture-recapture experiment was conducted using radio tags, fish wheels, and weirs to estimate the sockeye salmon escapement to the entire Susitna River drainage. Radio tags were used as the mark in the abundance experiment and to identify spawning locations of … Continue reading
Alaska Department of Fish and Game, Fishery Data Series No. 11-55, Anchorage. A stock assessment of Arctic grayling Thymallus arcticus ≥270 mm FL was conducted within a 122.6-km study area of the Chatanika River between Faith and Any creeks during 2007 for the purpose of evaluating exploitation rates and proposed regulatory changes. Using a two-event … Continue reading