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| infraordo = [[Anomura]]
| infraordo = [[Anomura]]
| superfamilia =Lithodoidea
| superfamilia =Lithodoidea
| subdivision_ranks = Genera<ref name="Grave">{{cite journal |journal = [[The Raffles Bulletin of Zoology]] |year=2009 |volume = Suppl. 21 |pages=1–109 |title = A classification of living and fossil genera of decapod crustaceans |author1=Sammy De Grave |author2=N. Dean Pentcheff |author3=Shane T. Ahyong |url=http://rmbr.nus.edu.sg/rbz/biblio/s21/s21rbz1-109.pdf|display-authors=etal}}</ref>
| subdivision_ranks = Genera<ref name="Grave">{{cite journal|journal=[[The Raffles Bulletin of Zoology]] |year=2009 |volume=Suppl. 21 |pages=1–109 |title=A classification of living and fossil genera of decapod crustaceans |author1=Sammy De Grave |author2=N. Dean Pentcheff |author3=Shane T. Ahyong |url=http://rmbr.nus.edu.sg/rbz/biblio/s21/s21rbz1-109.pdf |display-authors=etal |deadurl=yes |archiveurl=https://web.archive.org/web/20110606064728/http://rmbr.nus.edu.sg/rbz/biblio/s21/s21rbz1-109.pdf |archivedate=2011-06-06 |df= }}</ref>
| subdivision =
| subdivision =
*''[[Cryptolithodes]]''
*''[[Cryptolithodes]]''
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== Species ==
== Species ==
[[File:CSIRO ScienceImage 2839 Spiny Stone King Crab.jpg|thumb|''Lithodes longispina'']]
[[File:CSIRO ScienceImage 2839 Spiny Stone King Crab.jpg|thumb|''Lithodes longispina'']]
Around 121 species are known, in 10 genera:<ref>{{cite journal |author1=Patsy A. McLaughlin |author2=Tomoyuki Komai |author3=Rafael Lemaitre |author4=Dwi Listyo Rahayu |year=2010 |chapter=Part I – Lithodoidea, Lomisoidea and Paguroidea |editor1=Martyn E. Y. Low |editor2=S. H. Tan |title=Annotated checklist of anomuran decapod crustaceans of the world (exclusive of the Kiwaoidea and families Chirostylidae and Galatheidae of the Galatheoidea) |journal=[[Zootaxa]] |volume=Suppl. 23 |pages=5–107 |url=http://rmbr.nus.edu.sg/rbz/biblio/s23/s23rbz005-107.pdf |format=[[Portable Document Format|PDF]]}}</ref>
Around 121 species are known, in 10 genera:<ref>{{cite journal|author1=Patsy A. McLaughlin |author2=Tomoyuki Komai |author3=Rafael Lemaitre |author4=Dwi Listyo Rahayu |year=2010 |chapter=Part I – Lithodoidea, Lomisoidea and Paguroidea |editor1=Martyn E. Y. Low |editor2=S. H. Tan |title=Annotated checklist of anomuran decapod crustaceans of the world (exclusive of the Kiwaoidea and families Chirostylidae and Galatheidae of the Galatheoidea) |journal=[[Zootaxa]] |volume=Suppl. 23 |pages=5–107 |url=http://rmbr.nus.edu.sg/rbz/biblio/s23/s23rbz005-107.pdf |format=[[Portable Document Format|PDF]] |deadurl=yes |archiveurl=https://web.archive.org/web/20120122104557/http://rmbr.nus.edu.sg/rbz/biblio/s23/s23rbz005-107.pdf |archivedate=2012-01-22 |df= }}</ref>
{{div col|colwidth=26em}}
{{div col|colwidth=26em}}
*''[[Cryptolithodes]]'' <small>Brandt, 1848</small>
*''[[Cryptolithodes]]'' <small>Brandt, 1848</small>
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===''Paralithodes''===
===''Paralithodes''===
Red (''P. camtschaticus'') and blue (''P. platypus'') king crabs are some of the most important fisheries in Alaska, however populations have fluctuated in the past 25 years and some areas are currently closed due to overfishing. The two species are similar in size, shape and life history.<ref name="Jensen">{{cite journal |author1=G. C. Jensen |author2=D. A. Armstrong |year=1989 |title=Biennial reproductive cycle of blue king crab, ''Paralithodes platypus'', at the Pribilof Islands, Alaska and comparison to a congener ''Paralithodes camtschatica'' |journal=[[Canadian Journal of Fisheries and Aquatic Sciences]] |volume=46 |issue=6 |pages=932–940 |doi=10.1139/f89-120}}</ref><ref>{{cite journal |author1=A. K. Klitin |author2=S. A. Nizyaev |year=1999 |title=The distribution and life strategies of some commercially important Far Eastern lithodid crabs in the Kuril Islands |journal=[[Biologiya Morya]] |location=Vladivostok |volume=25 |issue=3 |pages=221–228}}</ref><ref name="Stevens">{{cite journal |author1=B. G. Stevens |author2=K. M. Swiney |year=2006 |title=Timing and duration of larval hatching for blue king crab ''Paralithodes platypus'' Brandt, 1850 held in the laboratory |journal=[[Journal of Crustacean Biology]] |volume=26 |issue=4 |pages=495–502 |doi=10.1651/S-2677.1 |url=http://www.umes.edu/cms300uploadedFiles/Stevens.2006.JCB.pdf |format=[[Portable Document Format|PDF]]}}</ref> Habitat is the main factor separating the range of blue and red king crabs in the Bering Sea.<ref name="NPFRC2005"/> Red king crabs prefer shallow, muddy or sandy habitats in Bristol Bay and Norton Sound,<ref name="NPFRC2005">{{cite journal |author=North Pacific Fishery Research Council |year=2005 |title=Essential Fish Habitat Assessment Report for the Bering Sea and Aleutian Islands King and Tanner Crabs |journal=[[NOAA Fisheries Report]] |url=http://www.fakr.noaa.gov/habitat/seis/final/Volume_II/Appendix_F.3.pdf |format=[[Portable Document Format|PDF]]}}</ref><ref>{{cite book |author1=J. Soong |author2=T. Kohler |year=2005 |title=Norton Sound Winter Red King Crab Studies |series=Fisheries Data Series |publisher=Alaska Department of Fish and Game |url=http://www.sf.adfg.state.ak.us/FedAidpdfs/fds05-48.pdf |format=[[Portable Document Format|PDF]]}}</ref> while blue king crabs prefer the deeper areas made up of cobble, gravel and rock that occur around the Pribilof, St. Matthew,<ref name="Zheng">{{cite journal |author1=J. Zheng |author2=M. C. Murphy |year=1997 |title=Application of a catch-survey analysis to blue king crab stocks near Pribilof and St. Matthew Islands |journal=[[Alaska Fishery Research Bulletin]] |volume=4 |issue=1 |pages=62–74 |url=http://www.adfg.state.ak.us/pubs/afrb/vol4_n1/zhenv4n1.pdf |format=[[Portable Document Format|PDF]]|display-authors=etal}}</ref><ref name="Vining">{{cite book |author1=Ivan Vining |author2=S. Forrest Blau |author3=Doug Pengilly |year=2001 |chapter=Evaluating changes in spatial distribution of blue king crab near St. Matthew Island |series=University of Alaska Sea Grant College Program Report |title=Spatial processes and management of marine populations | pages=327–348 |isbn=978-1-56612-068-5 |editor1=Gordon H. Kruse |editor2=Nicolas Bez |editor3=Anthony Booth |editor4=Martin W. Dorn |editor5=Sue Hills |editor6=Romuald N. Lipcius |editor7=Dominique Pelletier |editor8=Claude Roy |editor9=Stephen J. Smith |editor10=David Witherell |url=http://nsgl.gso.uri.edu/aku/akuw99004/akuw99004_full.pdf |format=[[Portable Document Format|PDF]]}}</ref> St. Lawrence and the Diomede Islands.
Red (''P. camtschaticus'') and blue (''P. platypus'') king crabs are some of the most important fisheries in Alaska, however populations have fluctuated in the past 25 years and some areas are currently closed due to overfishing. The two species are similar in size, shape and life history.<ref name="Jensen">{{cite journal |author1=G. C. Jensen |author2=D. A. Armstrong |year=1989 |title=Biennial reproductive cycle of blue king crab, ''Paralithodes platypus'', at the Pribilof Islands, Alaska and comparison to a congener ''Paralithodes camtschatica'' |journal=[[Canadian Journal of Fisheries and Aquatic Sciences]] |volume=46 |issue=6 |pages=932–940 |doi=10.1139/f89-120}}</ref><ref>{{cite journal |author1=A. K. Klitin |author2=S. A. Nizyaev |year=1999 |title=The distribution and life strategies of some commercially important Far Eastern lithodid crabs in the Kuril Islands |journal=[[Biologiya Morya]] |location=Vladivostok |volume=25 |issue=3 |pages=221–228}}</ref><ref name="Stevens">{{cite journal|author1=B. G. Stevens |author2=K. M. Swiney |year=2006 |title=Timing and duration of larval hatching for blue king crab ''Paralithodes platypus'' Brandt, 1850 held in the laboratory |journal=[[Journal of Crustacean Biology]] |volume=26 |issue=4 |pages=495–502 |doi=10.1651/S-2677.1 |url=http://www.umes.edu/cms300uploadedFiles/Stevens.2006.JCB.pdf |format=[[Portable Document Format|PDF]] |deadurl=yes |archiveurl=https://web.archive.org/web/20120319221503/http://www.umes.edu/cms300uploadedFiles/Stevens.2006.JCB.pdf |archivedate=2012-03-19 |df= }}</ref> Habitat is the main factor separating the range of blue and red king crabs in the Bering Sea.<ref name="NPFRC2005"/> Red king crabs prefer shallow, muddy or sandy habitats in Bristol Bay and Norton Sound,<ref name="NPFRC2005">{{cite journal |author=North Pacific Fishery Research Council |year=2005 |title=Essential Fish Habitat Assessment Report for the Bering Sea and Aleutian Islands King and Tanner Crabs |journal=[[NOAA Fisheries Report]] |url=http://www.fakr.noaa.gov/habitat/seis/final/Volume_II/Appendix_F.3.pdf |format=[[Portable Document Format|PDF]]}}</ref><ref>{{cite book |author1=J. Soong |author2=T. Kohler |year=2005 |title=Norton Sound Winter Red King Crab Studies |series=Fisheries Data Series |publisher=Alaska Department of Fish and Game |url=http://www.sf.adfg.state.ak.us/FedAidpdfs/fds05-48.pdf |format=[[Portable Document Format|PDF]]}}</ref> while blue king crabs prefer the deeper areas made up of cobble, gravel and rock that occur around the Pribilof, St. Matthew,<ref name="Zheng">{{cite journal |author1=J. Zheng |author2=M. C. Murphy |year=1997 |title=Application of a catch-survey analysis to blue king crab stocks near Pribilof and St. Matthew Islands |journal=[[Alaska Fishery Research Bulletin]] |volume=4 |issue=1 |pages=62–74 |url=http://www.adfg.state.ak.us/pubs/afrb/vol4_n1/zhenv4n1.pdf |format=[[Portable Document Format|PDF]]|display-authors=etal}}</ref><ref name="Vining">{{cite book |author1=Ivan Vining |author2=S. Forrest Blau |author3=Doug Pengilly |year=2001 |chapter=Evaluating changes in spatial distribution of blue king crab near St. Matthew Island |series=University of Alaska Sea Grant College Program Report |title=Spatial processes and management of marine populations | pages=327–348 |isbn=978-1-56612-068-5 |editor1=Gordon H. Kruse |editor2=Nicolas Bez |editor3=Anthony Booth |editor4=Martin W. Dorn |editor5=Sue Hills |editor6=Romuald N. Lipcius |editor7=Dominique Pelletier |editor8=Claude Roy |editor9=Stephen J. Smith |editor10=David Witherell |url=http://nsgl.gso.uri.edu/aku/akuw99004/akuw99004_full.pdf |format=[[Portable Document Format|PDF]]}}</ref> St. Lawrence and the Diomede Islands.


Red king crabs have an 11-month brood cycle in their first reproductive year and a 12-month cycle thereafter.<ref name="Stevens"/> Both red and blue king crabs have planktotrophic larvae that undergo 4 zoeal stages in the water column and a non-feeding, glaucothoe stage which is an intermediate stage which seeks appropriate habitat on the sea floor.
Red king crabs have an 11-month brood cycle in their first reproductive year and a 12-month cycle thereafter.<ref name="Stevens"/> Both red and blue king crabs have planktotrophic larvae that undergo 4 zoeal stages in the water column and a non-feeding, glaucothoe stage which is an intermediate stage which seeks appropriate habitat on the sea floor.

Revision as of 08:22, 6 May 2017

King crabs
Paralithodes californiensis
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Subphylum:
Crustacea
Class:
Malacostraca
Order:
Decapoda
Infraorder:
Anomura
Superfamily:
Lithodoidea
Family:
Lithodidae

Samouelle, 1819
Genera[1]

King crabs are a superfamily of crab-like decapod crustaceans chiefly found in cold seas. Because of their large size and the taste of their meat, many species are widely caught and sold as food, the most common being the red king crab (Paralithodes camtschaticus).

King crabs are generally thought to be derived from hermit crab-like ancestors, which may explain the asymmetry still found in the adult forms. This ancestry is supported by several anatomical peculiarities which are present only in king crabs and hermit crabs.[2] Although some doubt still exists about this theory, king crabs are the most widely quoted example of carcinisation among the Decapoda.[2] The evidence for this explanation comes from the asymmetry of the king crab's abdomen, which is thought to reflect the asymmetry of hermit crabs, which must fit into a spiral shell. Although formerly classified among the hermit crabs in the superfamily Paguroidea, king crabs are now placed in a separate superfamily, Lithodoidea.[1] This is not without controversy as there is a widespread consensus in the scientific community that king crabs are derived from hermit crabs and closely related to pagurid hermit crabs, and therefore a separate superfamily in the classification poorly reflects the phylogenetic relationship of this taxon.[2][3]

Species

Lithodes longispina

Around 121 species are known, in 10 genera:[4]

Glyptolithodes

Main article: Glyptolithodes

Glyptolithodes is found chiefly in the Southern Hemisphere, but extending as far north as California, although all its closest relatives live in the Northern Hemisphere. Its single species, G. cristatipes was originally placed in the genus Rhinolithodes.

Neolithodes

Neolithodes yaldwini

In 2011, scientists found Neolithodes yaldwini on the edge of Antarctica, probably as a result of global warming, with major impacts on sediment texture, bioturbation and local faunal diversity.[5][6]

Paralithodes

Red (P. camtschaticus) and blue (P. platypus) king crabs are some of the most important fisheries in Alaska, however populations have fluctuated in the past 25 years and some areas are currently closed due to overfishing. The two species are similar in size, shape and life history.[7][8][9] Habitat is the main factor separating the range of blue and red king crabs in the Bering Sea.[10] Red king crabs prefer shallow, muddy or sandy habitats in Bristol Bay and Norton Sound,[10][11] while blue king crabs prefer the deeper areas made up of cobble, gravel and rock that occur around the Pribilof, St. Matthew,[12][13] St. Lawrence and the Diomede Islands.

Red king crabs have an 11-month brood cycle in their first reproductive year and a 12-month cycle thereafter.[9] Both red and blue king crabs have planktotrophic larvae that undergo 4 zoeal stages in the water column and a non-feeding, glaucothoe stage which is an intermediate stage which seeks appropriate habitat on the sea floor.

Red king crabs make up over 90% of the annual king crab harvest. This crab is in the collection of the Children's Museum of Indianapolis.

Paralithodes camtschaticus

Main article: Paralithodes camtschaticus

The red king crab, Paralithodes camtschaticus, is a very large species, sometimes reaching a carapace width of 11 in (28 cm) and a leg span of 6 ft (1.8 m). Its natural range is the Bering Sea around the Kamchatka Peninsula area, between the Aleutian Islands and St. Lawrence Island. It can now also be found in the Barents Sea and the European Arctic, where it was intentionally introduced and is now becoming a pest.[14][15]

Paralithodes platypus

Main article: Paralithodes platypus

The blue king crab, Paralithodes platypus, lives near St. Matthew Island, the Pribilof Islands, and the Diomede Islands, Alaska, and there are populations along the coasts of Japan and Russia.[13] Blue king crabs from the Pribilof Islands are the largest of all the king crabs, sometimes exceeding 18 lb (8 kg) in weight.[16]

See also

References

  1. ^ a b Sammy De Grave; N. Dean Pentcheff; Shane T. Ahyong; et al. (2009). "A classification of living and fossil genera of decapod crustaceans" (PDF). The Raffles Bulletin of Zoology. Suppl. 21: 1–109. Archived from the original (PDF) on 2011-06-06. {{cite journal}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  2. ^ a b c Jonas Keiler; Stefan Richter; Christian S. Wirkner (2013). "Evolutionary morphology of the hemolymph vascular system in hermit and king crabs (Crustacea: Decapoda: Anomala)". Journal of Morphology. 274 (7): 759–778. doi:10.1002/jmor.20133.
  3. ^ Arthur Anker; Gustav Paulay (2013). "A remarkable new crab-like hermit crab (Decapoda: Paguridae) from French Polynesia, with comments on carcinization in the Anomura" (PDF). Zootaxa. 3722 (2): 283–300. doi:10.11646/zootaxa.3722.2.9.
  4. ^ Patsy A. McLaughlin; Tomoyuki Komai; Rafael Lemaitre; Dwi Listyo Rahayu (2010). Martyn E. Y. Low; S. H. Tan (eds.). "Annotated checklist of anomuran decapod crustaceans of the world (exclusive of the Kiwaoidea and families Chirostylidae and Galatheidae of the Galatheoidea)" (PDF). Zootaxa. Suppl. 23: 5–107. Archived from the original (PDF) on 2012-01-22. {{cite journal}}: |chapter= ignored (help); Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  5. ^ Craig R. Smith; Laura J. Grange; David L. Honig; Lieven Naudts; Bruce Huber; Lionel Guidi; Eugene Domack (2011). "A large population of king crabs in Palmer Deep on the west Antarctic Peninsula shelf and potential invasive impacts". Proceedings of the Royal Society B: Biological Sciences. 279: 1017. doi:10.1098/rspb.2011.1496.
  6. ^ Richard Black (September 6, 2011). "Giant crabs make Antarctic leap". BBC News.
  7. ^ G. C. Jensen; D. A. Armstrong (1989). "Biennial reproductive cycle of blue king crab, Paralithodes platypus, at the Pribilof Islands, Alaska and comparison to a congener Paralithodes camtschatica". Canadian Journal of Fisheries and Aquatic Sciences. 46 (6): 932–940. doi:10.1139/f89-120.
  8. ^ A. K. Klitin; S. A. Nizyaev (1999). "The distribution and life strategies of some commercially important Far Eastern lithodid crabs in the Kuril Islands". Biologiya Morya. 25 (3). Vladivostok: 221–228.
  9. ^ a b B. G. Stevens; K. M. Swiney (2006). "Timing and duration of larval hatching for blue king crab Paralithodes platypus Brandt, 1850 held in the laboratory" (PDF). Journal of Crustacean Biology. 26 (4): 495–502. doi:10.1651/S-2677.1. Archived from the original (PDF) on 2012-03-19. {{cite journal}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  10. ^ a b North Pacific Fishery Research Council (2005). "Essential Fish Habitat Assessment Report for the Bering Sea and Aleutian Islands King and Tanner Crabs" (PDF). NOAA Fisheries Report.
  11. ^ J. Soong; T. Kohler (2005). Norton Sound Winter Red King Crab Studies (PDF). Fisheries Data Series. Alaska Department of Fish and Game.
  12. ^ J. Zheng; M. C. Murphy; et al. (1997). "Application of a catch-survey analysis to blue king crab stocks near Pribilof and St. Matthew Islands" (PDF). Alaska Fishery Research Bulletin. 4 (1): 62–74.
  13. ^ a b Ivan Vining; S. Forrest Blau; Doug Pengilly (2001). "Evaluating changes in spatial distribution of blue king crab near St. Matthew Island". In Gordon H. Kruse; Nicolas Bez; Anthony Booth; Martin W. Dorn; Sue Hills; Romuald N. Lipcius; Dominique Pelletier; Claude Roy; Stephen J. Smith; David Witherell (eds.). Spatial processes and management of marine populations (PDF). University of Alaska Sea Grant College Program Report. pp. 327–348. ISBN 978-1-56612-068-5.
  14. ^ Lars Bevanger (August 9, 2006). "Norway fears giant crab invasion". BBC News.
  15. ^ Alex Kirby (September 29, 2003). "King crabs march towards the Pole". BBC News.
  16. ^ "King Crab 101". Fisherman's Express. 2000.
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