Prince William Sound Field Guide to King Crab Identification

Total Page：16

File Type：pdf, Size：1020Kb

Prince William Sound Field Guide to King Crab Identification

ALASKA DEPARTMENT OF FISH AND GAME DIVISION OF COMMERCIAL FISHERIES FIELD GUIDE TO KING CRAB IDENTIFICATION Three species of king crab occur in the Prince William Sound area but only legal size male golden king crab may be harvested in the Prince William Sound subsistence golden king crab and Tanner crab fishery. ONLY GOLDEN KING CRAB MAY BE HARVESTED GOLDEN KING CRAB Lithodes aequispinus mid-dorsal plate 5 to 9 spines on mid-dorsal plate ANNUAL HOUSEHOLD LIMIT = 3 ONLY LEGAL SIZE MALE CRAB MAY BE HARVESTED (SEE REVERSE) mid-dorsal plate BLUE KING CRAB Paralithodes platypus mid-dorsal plate 4 prominent spines on mid-dorsal plate NO HARVEST ALLOWED mid-dorsal plate RED KING CRAB Paralithodes camtschaticus mid-dorsal plate 6 prominent spines on mid-dorsal plate NO HARVEST ALLOWED mid-dorsal plate HOW TO DETERMINE SEX Only legal size male golden king crab may be harvested. MALE KING CRAB FEMALE KING CRAB Triangular abdominal flap Circular abdominal flap -continued- ALASKA DEPARTMENT OF FISH AND GAME DIVISION OF COMMERCIAL FISHERIES GOLDEN KING CRAB IDENTIFICATION Side view of rostrum Dorsal view of rostrum Paired tip HOW TO DETERMINE SIZE Legal male golden king crab carapace width is 7 inches or larger and is measured as the greatest straight line distance across the carapace including spines. Rostrum – look for paired tip Legal minimum size is 7 inches 5 to 9 spines on mid-dorsal plate More king crab information can be found in Biological Field Techniques for Lithodid Crabs by William E. Donaldson and Susan C. Byersdorfer, Alaska Sea Grant College Program, University of Alaska 2005. Photo and illustration credits: Susan Byersdorfer and William Donaldson, ADF&G Kodiak. © 2008 Alaska Department of Fish and Game ADF&G administers all programs and activities in compliance with state and federal civil rights and equal opportunity laws. Obtain the full ADF&G and Americans with Disabilities Act and Office of Equal Opportunity statement online at www.adfg.state.ak.us or from the ADF&G Public Communications Section at 907-465-6166. .

Copy Link

Recommended publications

Pribilof Islands Red King Crab
2011 Stock Assessment and Fishery Evaluation Report for the Pribilof Islands Blue King Crab Fisheries of the Bering Sea and Aleutian Islands Regions R.J. Foy Alaska Fisheries Science Center National Marine Fisheries Service, NOAA Executive Summary *highlighted text will be filled in with new survey and catch data prior to the September 2011 meeting. 1. Stock: Pribilof Islands blue king crab, Paralithodes platypus 2. Catches: Retained catches have not occurred since 1998/1999. Bycatch and discards have been steady or decreased in recent years to current levels near 0.5 t (0.001 million lbs). 3. Stock biomass: Stock biomass in recent years was decreasing between the 1995 and 2008 survey, and after a slight increase in 2009, there was a decrease in most size classes in 2010. 4. Recruitment: Recruitment indices are not well understood for Pribilof blue king crab. Pre-recruit have remained relatively consistent in the past 10 years although may not be well assessed with the survey. 5. Management performance: MSST Biomass Retained Total Year TAC OFL ABC (MMBmating) Catch Catch 2,105 113A 0 0 0.5 1.81 2008/09 (4.64) (0.25) (0.001) (0.004) 2,105 513B 0 0 0.5 1.81 2009/10 (4.64) (1.13) (0.001) (0.004) 286 C 1.81 2010/11 (0.63) (0.004) 2011/12 xD All units are tons (million pounds) of crabs and the OFL is a total catch OFL for each year. The stock was below MSST in 2009/10 and is hence overfished. Overfishing did not occur during the 2009/10 fishing year.
[Show full text]
Biennial Reproduction with Embryonic Diapause in Lopholithodes Foraminatus (Anomura: Lithodidae) from British Columbia Waters Author(S): William D
Biennial reproduction with embryonic diapause in Lopholithodes foraminatus (Anomura: Lithodidae) from British Columbia waters Author(s): William D. P. Duguid and Louise R. Page Source: Invertebrate Biology, Vol. 130, No. 1 (2011), pp. 68-82 Published by: Wiley on behalf of American Microscopical Society Stable URL: http://www.jstor.org/stable/23016672 Accessed: 10-04-2017 18:37 UTC REFERENCES Linked references are available on JSTOR for this article: http://www.jstor.org/stable/23016672?seq=1&cid=pdf-reference#references_tab_contents You may need to log in to JSTOR to access the linked references. JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at http://about.jstor.org/terms American Microscopical Society, Wiley are collaborating with JSTOR to digitize, preserve and extend access to Invertebrate Biology This content downloaded from 205.225.241.126 on Mon, 10 Apr 2017 18:37:38 UTC All use subject to http://about.jstor.org/terms Invertebrate Biology 130(1): 68-82. © 2011, The American Microscopical Society, Inc. DOI: 10.1111/j.l 744-7410.2011.00221 .x Biennial reproduction with embryonic diapause in Lopholithodes foraminatus (Anomura: Lithodidae) from British Columbia waters William D. P. DuguicT and Louise R. Page Department of Biology, University of Victoria, Victoria, British Columbia V8W 3N5, Canada Abstract.
[Show full text]
Pribilof Islands Golden King Crab May 2012 Crab SAFE Report Chapter
Pribilof Islands Golden King Crab May 2012 Crab SAFE Report Chapter (25 April 2012 Draft) Douglas Pengilly, ADF&G, Kodiak Executive Summary 1. Stock: Pribilof Islands (Pribilof District) golden king crab Lithodes aequispinus 2. Catches: Commercial fishing for golden king crab in the Pribilof District has been concentrated in the Pribilof Canyon. The fishing season for this stock has been defined as a calendar year (as opposed to a “crab fishery year”) following the close of the 1983/84 season. The domestic fishery developed in the 1982/83 season, although some limited fishing occurred at least as early as 1981/82. Peak harvest occurred in the 1983/84 season with a retained catch of 0.856-million pounds (388 t) by 50 vessels. Since then, participation in the fishery has been sporadic and annually retained catch has been variable, from 0 pounds in the nine years that no vessels participated (1984, 1986, 1990–1992, 2006–2009) up to a maximum of 0.342-million pounds (155 t) in 1995, when seven vessels made landings. The fishery is not rationalized. There is no state harvest strategy in regulation. A guideline harvest level (GHL) was first established for the fishery in 1999 at 0.200-million pounds (91 t) and has been managed towards a GHL of 0.150- million pounds (68 t) since 2000. No vessels participated in the directed fishery and no landings were made during 2006–2009. One vessel landed catch in 2010 and two vessels landed catch in 2011; directed fishery catch cannot be reported in those two years under the confidentiality requirements of Sec.
[Show full text]
Biological Perspectives on Crab Management in Alaska: an Oral Report to the Alaska Board of Fisheries
BIOLOGICAL PERSPECTIVES ON CRAB MANAGEMENT IN ALASKA: AN ORAL REPORT TO THE ALASKA BOARD OF FISHERIES BY Gordon H. Kruse Regional Information Report No. 5593-02 Alaska Department of Fish & Game Division of Commercial Fisheries P.O. Box 25526 Juneau, Alaska 99802-5526 January 31, 1993 BIOLOGICAL PERSPECTIVES ON CRAB MANAGEMENT IN ALASKA: AN ORAL REPORT TO THE ALASKA BOARD OF FISHERIES BY Gordon H. Kruse Regional Information ~eportlNo. 5J93-02 Alaska Department of Fish & Game Division of Commercial Fisheries P.O. Box 25526 Juneau., Alaska 99802-5526 January 31, 1993 l~heRegional Information Report Series was established in 1987 to provide an in£ormat ion access system for all unpublished divisional reports. These reports frequently serve diverse ad hoc informational purposes or archive basic uninterpreted data. To accommodate timely reporting of recently collected information, reports in this series undergo only limited internal review and may contain preliminary data; this information may be subsequently finalized and published in the formal literature. Consequently, these reports should not be cited without prior approval of the author or the Division of Commercial Fisheries. FORWARD We thought that we would begin the Board meeting with an overview of biology and management of crabs in Alaska. This talk is similar to a presentation that I have given at a couple of recent scientific meetings. One meeting was the International Symposium on Management Strategies for Exploited Fish Populations in Anchorage during October 21-24, 1992, and the other was the annual meeting of the Alaska Chapter of the American Fisheries Society in Valdez, Alaska, during November 16-19, 1992.
[Show full text]
Growth of Juvenile Golden King Crabs Lithodes Aequispinus in the Laboratory
Growth of Juvenile Golden King Crabs in the Laboratory • Paul and Paul 133 Growth of Juvenile Golden King Crabs Lithodes aequispinus in the Laboratory A. J. Paul and J. M. Paul Reprinted from the Alaska Fishery Research Bulletin Vol. 8 No. 2, Winter 2001 The Alaska Fisheries Research Bulletin can be found on the World Wide Web at URL: http://www.state.ak.us/adfg/geninfo/pubs/afrb/afrbhome.htm GrowthAlaska Fishery of Juvenile Research Golden Bulletin King 8(2) Crabs 135–138. in the 2001.Laboratory • Paul and Paul Notes135 Copyright © 2001 by the Alaska Department of Fish and Game Growth of Juvenile Golden King Crabs Lithodes aequispinus in the Laboratory A. J. Paul and J. M. Paul ABSTRACT: Growth observations were made for juvenile male golden king crabs Lithodes aequispinus with carapace lengths (CL) of 2 to 35 mm to improve our understanding of the recruitment process. Gravid females were captured in Prince William Sound, Alaska, and juveniles were reared in the laboratory at 3°–10°C to obtain information on growth per molt and intermolt duration. The equation describing the increase in CL for crabs 2 to 35 mm CL was: New CL mm = Initial CL (1.25) + 0.14; r2 = 0.99, n = 76. The average increase in CL after molting was 28% (SD = 8%), and the corresponding value for chela height (CH) was 33% (SD = 17%). The intermolt duration, in units of degree days, of crabs 2 to 35 mm CL was described by the equation: Intermolt Duration = Initial CL mm (16.32) + 259; r2 = 0.76.
[Show full text]
Challenging the Cold: Crabs Reconquer the Antarctic
Ecology, 86(3), 2005, pp. 619±625 q 2005 by the Ecological Society of America CHALLENGING THE COLD: CRABS RECONQUER THE ANTARCTIC SVEN THATJE,1,5 KLAUS ANGER,2 JAVIER A. CALCAGNO,3 GUSTAVO A. LOVRICH,4 HANS-OTTO POÈ RTNER,1 AND WOLF E. ARNTZ1 1Alfred Wegener Institute for Polar and Marine Research, Columbusstr. D-27568 Bremerhaven, Germany 2Biologische Anstalt Helgoland, Foundation Alfred Wegener Institute, Helgoland, Germany 3Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Intendente GuÈiraldes 2160, C1428EHA, Buenos Aires, Argentina 4Consejo Nacional de Investigaciones CientõÂ®cas y TeÂcnicas, Centro Austral de Investigaciones CientõÂ®cas, CC 92, V9410BFD Ushuaia, Tierra del Fuego, Argentina Abstract. Recent records of lithodid crabs in deeper waters off the Antarctic continental slope raised the question of the return of crabs to Antarctic waters, following their extinction in the lower Miocene ;15 million years ago. Antarctic cooling may be responsible for the impoverishment of the marine high Antarctic decapod fauna, presently comprising only ®ve benthic shrimp species. Effects of polar conditions on marine life, including lowered metabolic rates and short seasonal food availability, are discussed as main evolutionary driving forces shaping Antarctic diversity. In particular, planktotrophic larval stages should be vulnerable to the mismatch of prolonged development and short periods of food avail- ability, selecting against complex life cycles. We hypothesize that larval lecithotrophy and cold tolerance, as recently observed in Subantarctic lithodids, represent, together with other adaptations in the adults, key features among the life-history adaptations of lithodids, potentially enabling them to conquer polar ecosystems. The return of benthic top predators to high Antarctic waters under conditions of climate change would considerably alter the benthic communities.
[Show full text]
A New Pathogenic Virus in the Caribbean Spiny Lobster Panulirus Argus from the Florida Keys
DISEASES OF AQUATIC ORGANISMS Vol. 59: 109–118, 2004 Published May 5 Dis Aquat Org A new pathogenic virus in the Caribbean spiny lobster Panulirus argus from the Florida Keys Jeffrey D. Shields1,*, Donald C. Behringer Jr2 1Virginia Institute of Marine Science, The College of William & Mary, Gloucester Point, Virginia 23062, USA 2Department of Biological Sciences, Old Dominion University, Norfolk, Virginia 23529, USA ABSTRACT: A pathogenic virus was diagnosed from juvenile Caribbean spiny lobsters Panulirus argus from the Florida Keys. Moribund lobsters had characteristically milky hemolymph that did not clot. Altered hyalinocytes and semigranulocytes, but not granulocytes, were observed with light microscopy. Infected hemocytes had emarginated, condensed chromatin, hypertrophied nuclei and faint eosinophilic Cowdry-type-A inclusions. In some cases, infected cells were observed in soft con- nective tissues. With electron microscopy, unenveloped, nonoccluded, icosahedral virions (182 ± 9 nm SD) were diffusely spread around the inner periphery of the nuclear envelope. Virions also occurred in loose aggregates in the cytoplasm or were free in the hemolymph. Assembly of the nucleocapsid occurred entirely within the nucleus of the infected cells. Within the virogenic stroma, blunt rod-like structures or whorls of electron-dense granular material were apparently associated with viral assembly. The prevalence of overt infections, defined as lethargic animals with milky hemolymph, ranged from 6 to 8% with certain foci reaching prevalences of 37%. The disease was transmissible to uninfected lobsters using inoculations of raw hemolymph from infected animals. Inoculated animals became moribund 5 to 7 d before dying and they began dying after 30 to 80 d post-exposure.
[Show full text]
A Review of Worldwide Fisheries for Lithodid Crabs (Decapoda: Anomura: Lithodidae) and Their Fluctuations
Bi ology ofAnomura II (A .Asakura ，e d.)，Cr ustaceanR esearc h，Sp ec ialN umber6: 167-185，2006 A review of worldwide fisheries for lithodid crabs (Decapoda: Anomura: Lithodidae) and their fluctuations R obert S. Otto Abstra ct.-Lithodid crab fi sheries began species within these genera，trends in landings before1900 in Japan and spread across the and cu汀 ent status of major stocks contributing North Pacific Ocean by1940. Fisheries targeted to the world lithodid landings. lncidental or red kin gcrab (Paralithodes ca mtsc hati cus) with experimental fisheries for Neolithodes spp. and lesser amounts of blue king crab (P. platypus) for Lopholithodes spp. are omitt ed，because and brown king crab (P. brevip es) .Paralithod es documented landings are sporadic，trends spp.，es pec iall yred kin gcrabs ，h ave always are not evident and magnitudes negligible. dominated lithodid fisherie s. Golden king crab Likewise，1 have excluded recreational or (Lithodes aequispinus) becam eimportant in personal use fisheries，because statistics are North Pacific Ocean waters after major decline s frequently incomplete and known landings are in red king crab fisheries in the early 1980's. Southern kin gcrab (Lithodes sa ntolla) are fished generall ysm a ll relative to commercial白sheries. in so uthern South America along with softshell red crab (Paralomis granulosa). These five species DATASOURCES accounted for more than 89% of lithodid landings for 1984・2003. World lithodid landings pea ked at 1use United Nations Food and Agricultural 150，100 metric tons (t) in 1966 after development Organization (FAO) landing statistic sas a in pre-World War 11 Asia and rapid post-1950 starting point and more detai led publications ex pansion in A laskaand Asia.
[Show full text]
Spatial Variability in Size at Maturity and Reproductive Timing of Golden King Crab (Lithodes Aequispinus) in Southeast Alaska
Spatial variability in size at maturity and reproductive timing of golden king crab (Lithodes aequispinus) in Southeast Alaska Item Type Thesis Authors Olson, Andrew P. Download date 01/10/2021 23:44:12 Link to Item http://hdl.handle.net/11122/6849 SPATIAL VARIABILITY IN SIZE AT MATURITY AND REPRODUCTIVE TIMING OF GOLDEN KING CRAB (LITHODESAEQUISPINUS) IN SOUTHEAST ALASKA By Andrew P. Olson, B.S. A Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Science in Fisheries University of Alaska Fairbanks August 2016 APPROVED: Dr. Ginny L. Eckert, Committee Chair Dr. Gordon H. Kruse, Committee Member Dr. Christopher E. Siddon, Committee Member Dr. Franz Mueter, Chair Graduate Program in Fisheries Dr. S. Bradley Moran, Dean School of Fisheries and Ocean Sciences Dr. Michael Castellini, Dean of the Graduate School Abstract Many crab fisheries around the world are managed by size, sex and season regulations, where male crabs are given at least one opportunity to reproduce before being harvested. Therefore, to set minimum legal size and fishing season for harvest, information on size at maturity and reproductive timing is needed. Lithodes aequispinus has supported a commercial fishery in Southeast Alaska since 1972, with an average annual harvest of 207 t. The current legal size and season for harvest are based L. aequispinus growth and maturity information from other parts of the range and limited information on reproduction. Additionally, evidence suggests that these life history parameters can vary spatially. Therefore, I investigated size at maturity, reproductive timing, and variation in harvest from the commercial fishery for L.
[Show full text]
A Review of the Impact of Diseases on Crab and Lobster Fisheries
A Review Of The Impact Of Diseases On Crab And Lobster Fisheries Jeffrey D. Shields Virginia Institute of Marine Science, The College of William and Mary, Gloucester Point, VA 23062 Abstract Diseases are a natural component of crustacean populations. Background levels of various agents are expected in fished populations, and there is good reason to establish baseline levels of pathogens in exploited fisheries before they become a problem. Such baselines are often difficult to fund or publish; nonetheless, outbreaks are an integral feature of heavily exploited populations. Mortalities or other problems can arise when an outbreak occurs, and all too often the underlying causes of an outbreak are poorly understood. A variety of stressors can lead to outbreaks of disease or contribute to their severity. Pollution, poor water quality, hypoxia, temperature extremes, overexploitation have all been implicated in various outbreaks. This review focuses on epidemic diseases of commercially important crabs and lobsters as well as a few examples of other disease issues in crustaceans that are ecologically important, but not of commercial significance. Key words: pathogens, crustaceans, mortality, Carcinonemertes, PaV1, overfishing, Rhizo- cephala, Paramoeba Introduction Pathogens cause direct and indirect losses to fish were thought to contain presumptive crustacean fisheries. Direct losses are obvi- toxins (Magnien 2001). At the time, the ous, resulting in morbidity or mortality to scare threatened the commercial fishing in- the fished species, but they can be difficult dustry of Chesapeake Bay because consum- to assess. However, mortality events can be ers did not purchase fish from the region. widespread and can even damage the socio- economics of impacted fishing communities, Direct losses are most visible to the fishery such as the lobster mortality event in Long because the outcome is usually morbidity or Island Sound during 1999 (Pearce and mortality to the targeted component of the Balcom 2005).
[Show full text]
Alaska Crab Stock Enhancement and Rehabilitation / Bradley G
Workshop Proceedings March 14-16, 2006 Kodiak, Alaska Bradley G. Stevens, Editor Published by Alaska Sea Grant College Program University of Alaska Fairbanks AK-SG-06-04 Elmer E. Rasmuson Library Cataloging in Publication Data: Alaska crab stock enhancement and rehabilitation / Bradley G. Stevens, editor. – Fairbanks, Alaska : Alaska Sea Grant College Program, 2006. p. ; cm. (Alaska Sea Grant College Program, University of Alaska Fairbanks; AK-SG-06-04) Notes: “Workshop proceedings. March 14-16, 2006.” “Grant NA06OAR4170013, project A/161-01.” ISBN 1-56612-112-4 1. Crab fisheries—Congresses. I. Title. II. Stevens, Bradley Gene. III. Series: Alaska Sea Grant College Program report ; AK-SG-06-04. SH380.4.A43 2006 Credits This book is published by the Alaska Sea Grant College Program, supported by the U.S. Department of Commerce, NOAA National Sea Grant Office, grant NA06OAR4170013, project A/161-01; and by the University of Alaska Fairbanks with state funds. University of Alaska is an affirmative action/equal opportunity employer and educational institution. Sea Grant is a unique partnership with public and private sectors combining research, education, and technology transfer for public service. This national network of uni- versities meets changing environmental and economic needs of people in our coastal, ocean, and Great Lakes regions. Book design is by Jen Gunderson, cover design is by Brooks Pleninger, and copy-editing is by Sue Keller. Front cover photo by Art Sutch, adult red king crab. Back cover photos by Bradley G. Stevens. Left: Glaucothoe larva, transitional between zoea and first crab stage. Its job is to select habitat that will protect it from predation.
[Show full text]
(Lithodes Aequispinus) in the Ment Has Emerged with the Recent Adop- Eastern Aleutian Islands in Alaska Tion of a Size-Based Stock Assessment Model
380 National Marine Fisheries Service Fishery Bulletin First U.S. Commissioner established in 1881 of Fisheries and founder NOAA of Fishery Bulletin Abstract—The golden king crab (Lith- Development of harvest control rules for odes aequispinus) has traditionally been managed in the Aleutian Islands hard-to-age crab stocks: the example of the by using a constant catch strategy but interest in abundance- based manage- golden king crab (Lithodes aequispinus) in the ment has emerged with the recent adop- eastern Aleutian Islands in Alaska tion of a size-based stock assessment model. Management strategy evalua- 1 4 tion (MSE) is commonly used to quantify Shareef M. Siddeek (contact author) Steve Martell 2 1 conservation and economic trade-offs of Benjamin Daly Jie Zheng alternative management strategies, but André E. Punt3 Mark Stichert2 computational constraints can impede the representation of all sources of Email address for contact author: [email protected] uncertainty. We conducted a simpli- fied MSE for the golden king crab that 1 3 focused on what we regarded as the Division of Commercial Fisheries School of Aquatic and Fishery Sciences major uncertainties, including initial Alaska Department of Fish and Game University of Washington stock abundance, future recruitment, P.O. Box 115526 P.O. Box 355020 estimation of mature male biomass Juneau, Alaska 99811 Seattle, Washington 98105- 5020 and abundance, and catch implementa- 2 Division of Commercial Fisheries 4 Sea State Inc. tion error, while capturing the existing Alaska Department of Fish and Game 9401 NE Tidal Court unique federal and state cooperative 351 Research Court Bainbridge Island, Washington 98110 management framework for crab stocks Kodiak, Alaska 99615 in the Bering Sea and Aleutian Islands.
[Show full text]