Discovery of a peculiar femaleChionoecetes bairdi tanner crab

Discovery of a peculiar femaleChionoecetes bairdi tanner crab Russian Journal of Marine Biology, Vol. 26, No. 5, 2000, p. 388. Original Russian Text Copyright 9 2000 by Bwlogiya Morya, Selin, AN INTERESTING FINDING N. I. Selin Institute of Marine Biology, Far East Division, Russian Academy of Sciences, ul. Pal'chevskogo 17, Vladivostok, 690041 Russia A characteristic feature of the organization of the had developed and grown normally, as evidenced by its members of the family Majidae (Crustacea: Decapoda) body size, which was close to the average value for the is the presence of five pairs of walking limbs located examined aggregation of this species (the carapace symmetrically on either side of the body. This morpho- width was 98.3 and 98.0 + 6.4 mm, respectively), the logical feature visually distinguishes these species bilateral symmetry of the body characteristic of this species, and by eggs on the pleopods, which were typi- from the crabs of the family Lithodidae, which have four pairs of functionally analogous limbs. cal in volume and development for the time of year. In August 1999, during population biology research If the finding of the female with nine walking limbs on the western Kamchatka aggregations of crabs in the is an example of the discovery of a mutant, it might be Sea of Okhotsk, together with normal individuals, a interesting to find out at what stage of development the morphologically peculiar female Chionoecetes bairdi structure diverged and how many crabs have such struc- tanner crab was caught in a conical crab trap of the Jap- tural deviations, and to elucidate the cause of this muta- anese type at a depth of 82 m at 52 ~ 17' N, 155 ~ 50' E. tion. These questions remain unanswered. Let us only Its distinctive feature was the presence of only four note that, of about 50000 examined C. bairdi crabs, walking limbs on the right side of the body. Since the there was only one animal with such a body structure. symmetrically located limbs are normally equal in size, we can, with a certain assuredness, assume that the fifth REFERENCES leg of the female was absent. It is known that, in nature, crabs often lack one, two, 1. Edwards, J.S., Limb Loss and Regeneration in Two or even more than half of their limbs [1, 2]. However, Crabs: the King Crab Paralithodes camtschatica and the most of these are autotomies that result from various Tanner crab Chionoecetes bairdi, Acta Zool., 1972, vol. 53, no. 1, pp. 105-112. accidents, and the basis and part of the ischium are usu- ally retained, while the rest of the thoracic appendage is 2. Ivanov G.B. Limb Injuries in Crabs in the Western Ber- lost [3]. In the caught female tanner crab, none of these ing Sea (Crustacea Decapoda: Brachiura Majidae, Ano- traces of a lost limb were observed. It is possible that mura Lithodidae), Arthr. Selec., 1994, vol. 3, nos. 3--4, pp. 33-56. the animal had only 9 legs initially, as the basis, isch- ium, and coxa were all absent. The neighboring part of 3. McVean, A., Autotomy, Biology of Crustacea, New the skeleton showed no traces of trauma. The female York: Academic Press, 1982, vol. 4, pp. 107-132. 9 2000 MAIK "Nauka/Interperiodica" 1063-0740/00/2605-0388525.00 Russian Journal of Marine Biology Springer Journals

Discovery of a peculiar femaleChionoecetes bairdi tanner crab

1 page

Loading next page...
1 Page
Copyright © 2000 by MAIK “Nauka/Interperiodica”
Life Sciences; Freshwater & Marine Ecology; Marine Ecology
Publisher site
See Article on Publisher Site


You’re reading a free preview. Subscribe to read the entire article.

DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.



billed annually
Start Free Trial

14-day Free Trial