SEXUAL DIMORPHISM OF EXTERNAL MORPHOLOGICAL CHARACTERS IN SOME DEEPWATER SKATES (RAJIDAE, ARHYNCHOBATIDAE, RAJIFORMES, CHONDRICHTHYES) OF THE NORTH ATLANTIC
https://doi.org/10.1234/XXXX-XXXX-2010-1-46-51
Abstract
Results of the study on external morphology of five deepwater skates from the North Atlan-tic (Amblyraja jenseni, Bathyraja pallida, B. richardsoni, Rajella bigelowi, R. kukujevi) conducted in various museums showed that their males and females significantly differ in 9 characters in first species, 14 — in second species, by 11 — in third and fourth species, and 10 — in latter species. Sexual differences occur most frequently in the length of 1st gill slit (4 of 5 species), length of nasal curtain, mouth width, and length of 3rd gill slit (3 of 5), disc width, lengths of 1st and 2nd dorsal fin bases, length of 5th gill slit, spaces between 1st and 5th gill slits, interspiracular width, distance between snout and center of anus, distance between snout and maximum disc width, interorbital width (2 of 5).
About the Authors
A. M. Orlov
Всероссийский научно-исследовательский институт рыбного хозяйства и океанографии (ВНИРО). 107140, г. Москва, ул. В. Красносельская, д. 17
Russian Federation
Russian Federation
C. F. Cotton
аспирант Вирджинского института морских наук. Тел. +1 (804)-684-75-56
United States
United States
D. A. Shevernitsky
Russian Federation
References
1. Ishiyama R. Studies on the rajid fishes (Rajidae) found in the waters around Japan // J. Shimonoseki Coll. Fish. 1958. Vol. 7. P. 193—394.
2. Stehmann M. Breviraja caerulea spec. nov. (Elasmobranchii, Batoidea, Rajidae); a new deepwater skate and the first record of the genus in the North East Atlantic // Arch. FischWiss. 1976. Vol. 27. P. 97—114.
3. Stehmann M.F.W., Merrett N.R. First records of advanced embryos and egg capsules of Bathyraja skates from the deep north-eastern Atlantic // J. Fish Biol. 2001. Vol. 59. P. 338—349.
4. Orlov A., Cotton C., Byrkjedal I. Deepwater skates (Rajidae) collected during the 2004 cruises of R.V. “G.O. Sars” and M.S. “Loran” in the Mid-Atlantic Ridge arean // Cybium. 2006. Vol. 30, suppl. 35—48.
5. Hubbs C.L., Ishiyama R. Methods for taxonomic study and description of skates (Rajidae) // Copeia. 1968. Vol. 3. P. 483—491.
6. Bigelow H.B., Schroeder W.C. Notes on Northwest Atlantic sharks and skates // Bull. Mus. Comp. Zool. 1927. Vol. 68. P. 237—251.
7. Bigelow H.B., Schroeder W.C. New and little known cartilaginous fishes from the Atlantic // Bull. Mus. Comp. Zool. 1950. Vol. 103. P. 385—408.
8. Bigelow H.B., Schroeder W.C. Sawfishes, guitarfishes, skates and rays. Fishes of the Western North Atlantic // Mem. Sears Found. Mar. Res. 1953. Vol. 1. Pt 2. 514 p.
9. Garrick J.A.F. Studies on New Zealand Elasmobranchii. Part XIII. A new species of Raja from 1,300 fathoms // Trans. R. Soc. N.Z. 1961. Vol. 88. P. 743—748.
10. Forster G.R. Raja richardsoni from the continental slope off south-west England // J. Mar. Biol. Assoc. U.K. 1965. Vol. 45. P. 773—777.
11. Leviton A.E., Gibbs R.H.Jr., Heal E., Dawson C.E. Standards in herpetology and ichthyology: Part 1. Standard symbolic codes for institutional resource collections in herpetology and ichthyology // Copeia. 1985. Vol. 3. P. 802—832.
12. Forster G.R. A new deep-sea ray from the Bay of Biscay // J. Mar. Biol. Assoc. U.K. 1967. Vol. 47. P. 281—286.
13. Tempelman W. The skate, Raja richardsoni Garrick, 1961, assigned to Bathyraja // J. Fish. Res. Bd. Canada. 1973a. Vol. 30. P. 1729—1732.
14. Tempelman W. First records, description, distribution, and notes on the biology of Bathyraja richardsoni (Gar-rick) from the Northwest Atlantic // J. Fish. Res. Bd. Ca-nada. 1973b. Vol. 30. P. 1831—1840.
15. Stehmann M. Raja “bathyphila”, eine Doppelart des Subgenus Rajella: Wiederbeschreibung von R. bathyphi-la Holt & Byrne, 1908 und Raja bigelowi spec. nov. (Pis-ces, Rajiformes, Rajidae) // Arch. FishWiss. 1978. Vol. 29. P. 23—58.
16. Stehmann M. First and new records of skates (Chondrichthyes, Rajiformes, Rajidae) from the West African continental slope (Morocco to South Africa), with descriptions of two new species // Arch. Fish. Mar. Res. 1995. Vol. 43. P. 1—119.
17. Долганов В.Н. Raja (Rajella) kukujevi sp. n. (Elasmobranchii, Rajidae) — новый вид ската с Северо-Атлантического хребта // Зоол. журн. 1985. Vol. 64. P. 304—307.
18. Pequeno G., Navarro R., Oporto G. Discopyge tschudii Heckel 1845: contribution to its taxonomy with emphasis on its sexual dimorphism (Chondrichthyes, Narcinidae) // Estud. Oceanol. Inst. Invest. Univ. Antofagasta. 1988. Vol. 7. P. 41—50 (In Spanish with English summary).
19. Braccini J.M., Chiaramonte G.E. Intraspecific variation in the external morphology of the sand skate // J. Fish Biol. 2002. Vol. 62. P. 959—972.
20. Jardas I. The morphometry and population diagnostic of thornback ray, Raja clavata L., in the Adriatic // Acta Adriatica. 1975. Vol. 17. P. 1—26.
Review
For citations:
Orlov A.M., Cotton C.F., Shevernitsky D.A. SEXUAL DIMORPHISM OF EXTERNAL MORPHOLOGICAL CHARACTERS IN SOME DEEPWATER SKATES (RAJIDAE, ARHYNCHOBATIDAE, RAJIFORMES, CHONDRICHTHYES) OF THE NORTH ATLANTIC. Vestnik Moskovskogo universiteta. Seriya 16. Biologiya. 2010;(1):46-51. (In Russ.) https://doi.org/10.1234/XXXX-XXXX-2010-1-46-51
Views:
349
Email this article 