Download or read book Recommended Harvest Strategy for Aleutian Islands Golden King Crab written by Benjamin Daly and published by . This book was released on 2019 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: Golden king crab (Lithodes aequispinus) occur in disjunct spatial distributions from the Japan Sea to the northern Bering Sea (ca. 61° N latitude) and as far south as northern British Columbia, with commercial concentrations throughout the Aleutian Islands. The Aleutian Islands golden king crab (AIGKC) fishery is managed in two separate areas east (eastern Aleutian golden, EAG) and west (western Aleutian golden, WAG) of 174° W long with total allowable catch (TAC) fixed in regulation for each area with the intent to develop an abundance-based harvest strategy once a stock assessment model is established. The recently accepted a male-only, size-based stock assessment model provides population abundance estimates that were not previously available. We conducted 30-year forecast simulations (500 replicates) to evaluate how thirteen different harvest policies affect stock sustainability and productivity by comparing conservation (overfished, overfishing, stock status) and economic (fishery closures, catch, catch variation, fishing effort) criteria. All harvest policies we compared included three components: 1) a threshold for opening and closing the fishery based on mature male abundance, 2) an exploitation rate on mature male abundance, and 3) a maximum allowable exploitation rate on legal size males. TACs are determined separately for the EAG and WAG, thus we independently evaluated the various harvest policies for each area. The recommended harvest policy includes a threshold for opening the fishery of 25% of the long-term average of mature male abundance (1985-2017), a moderate exploitation rate on mature male abundance (see final action for specific exploitation rates), and a 25% maximum exploitation rate on legal male abundance for both areas. Our analysis suggests that these policies balance the tradeoff between conservation and economic considerations.
Download or read book Recommended Harvest Strategy for Bering Sea Tanner Crab written by Benjamin Daly and published by . This book was released on 2020 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game (ADF&G) harvest strategy for Bering Sea Tanner crab has evolved over the past 40 years in response to fluctuations in biomass, advancements in understanding of Tanner crab biology, and continued improvements in assessment modelling approaches. Although the intent of all harvest strategy changes was to improve the stability of this fishery and minimize closures, this fishery has been closed 5 out of the last 10 seasons and currently has the most complicated strategy of all the Bering Sea Aleutian Islands (BSAI) crab stocks. In collaboration among ADF&G, the University of Washington, the National Oceanic and Atmospheric Administration (NOAA), and the commercial crab industry, we take a holistic approach using the most current scientific methods to evaluate and advance a new harvest strategy that explicitly incorporates conservation and economic goals. Specifically, we used a Management Strategy Evaluation (MSE) via 100-year forecast simulations to examine the ability of 15 harvest strategies to provide sustainable harvest. Additionally, we recomputed historical total allowable catches (TACs) to further understand harvest strategy performance using “real” data (i.e., not simulated data in the MSE forecast simulations). Of the 15 strategies, 7 were discarded due to conservation concerns (e.g., high probability of total fishery mortality exceeding federal overfishing limits), and two were discarded due to economic concerns (e.g., low projected catch). Because male-only policies ignore the contribution of females to the reproductive potential of the population, we focused our recommendation on polices that include consideration of mature female biomass. Of those 4 remaining policies, we recommend a harvest policy that includes a threshold for opening the fishery of 25% of the long-term (1982-2018) average of mature male biomass, a minimum (5% or 10%) and 20% maximum exploitation rate on mature male biomass adjusted for relative mature female biomass, and a 50% maximum exploitation rate on exploitable, industry-preferred size legal male abundance. Our analysis suggests these policies balance the tradeoff between conservation and economic considerations.
Download or read book Bering Sea Aleutian Islands Crab Fisheries written by and published by . This book was released on 2004 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Harvest Strategy for Kodiak and Bristol Bay Red King Crab and St Matthew Island and Pribilof Blue King Crab written by Douglas Pengilly and published by . This book was released on 1995 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Project Operational Plan for the 1997 Aleutian Islands Golden King Crab Pot Survey written by Leslie J. Watson and published by . This book was released on 1997 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bering Sea Aleutian Islands Crab Fisheries written by and published by . This book was released on 2004 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Overview of Recommended Harvest Strategy for Snow Crabs in the Eastern Bering Sea written by Jie Zheng and published by . This book was released on 2002 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bering Sea Aleutian Islands King Crab Fisheries Management Plan FMP written by and published by . This book was released on 1984 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alaska Groundfish Harvest Specifications written by and published by . This book was released on 2007 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Overview of Population Estimation Methods and Recommended Harvest Strategy for Red King Crabs in Bristol Bay written by Jie Zheng and published by . This book was released on 1996 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The 1997 Aleutian Islands Golden King Crab Survey written by S. Forrest Blau and published by . This book was released on 1998 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book King Crabs of the World written by Bradley G. Stevens and published by CRC Press. This book was released on 2014-03-18 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: With species existing in all subpolar seas, king crabs are one of the most valuable seafoods. Major fluctuations in their abundance have stimulated a flurry of research and a rapid expansion of the scientific literature in the last decade. King Crabs of the World: Biology and Fisheries Management consolidates extensive knowledge on the biology, sys
Download or read book Project Operational Plan for the 2000 Bering Sea Test Fishery written by Donn Tracy and published by . This book was released on 2000 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Navigation Improvements Akutan written by and published by . This book was released on 2004 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The 2000 Aleutian Islands Golden King Crab Survey and Recoveries of Tagged Crabs in the 1997 1999 and 2000 2002 Fishing Seasons written by Leslie J. Watson and published by . This book was released on 2002 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Draft Environmental Impact Statement for the Bering Sea Aleutian Islands King Crab Fishery Management Plan written by and published by . This book was released on 1981 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Feasibility Report for Navigation Improvements Unalaska written by and published by . This book was released on 2004 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
