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Infotaula taxonòmicaTheragra
Walleye pollock.jpg
Theragra chalcogramma
Pollachus chalcogrammus.png
Theragra chalcogramma (il·lustració del 1906)
Gènere Theragra
(Lucas, 1898)[1][2]
Tipus taxonòmic Gadus chalcogrammus (Pallas, 1814)
Modifica dades a Wikidata

Theragra és un gènere de peixos pertanyent a la família dels gàdids.[3]

Distribució geogràfica[modifica]

Theragra chalcogramma es troba al Pacífic nord (des de Kivalina -Alaska- fins al sud del mar del Japó i Califòrnia -els Estats Units-) i Theragra finnmarchica a l'Atlàntic nord-oriental (els extrems septentrionals de Noruega i Rússia al mar de Barentsz).[4][5]



  1. Jordan D. S. & Evermann B. W., 1898. The fishes of North and Middle America: a descriptive catalogue of the species of fish-like vertebrates found in the waters of North America north of the Isthmus of Panama. Part III. Bull. U. S. Natl. Mus. Núm. 47. i-xxiv + 2183a-3136.
  2. uBio (anglès)
  3. The Taxonomicon (anglès)
  4. GBIF (anglès)
  5. 5,0 5,1 Catalogue of Life (anglès)
  6. Pallas, P. S., 1814. Zoographia Rosso-Asiatica, sistens omnium animalium in extenso Imperio Rossico et adjacentibus maribus observatorum recensionem, domicilia, mores et descriptiones anatomen atque icones plurimorum. 3 vols. (1811-1814). Petropoli. Zool. Rosso-Asiatica v. 3: i-vii + 1-428 + index (I-CXXV), Pls. 1, 13, 14, 15, 20 and 21.
  7. Bailey, K. i J. Dunn, 1979. Spring and summer foods of walleye pollock, Theragra chalcogramma, in the eastern Bering Sea. Fish. Bull. 77(1):304-308.
  8. Bailey, K.M. i C.L. Stehr, 1986. Laboratory studies on the early life history of the walleye pollock, Theragra chalcogramma (Pallas). J. Exp. Mar. Biol. Ecol. 99:233-246.
  9. Brodeur, R.D., 1998. Prey selection by age-0 walleye pollock, Theragra chalcogramma, in nearshore waters of the gulf of Alaska. Environ. Biol. Fish. 51(2):175-186.
  10. Brodeur, R.D., M.S. Busby i M.T. Wilson, 1995. Summer distribution of early life stages of walleye pollock, Theragra chalcogramma, and associated species in the western Gulf of Alaska. Fish. Bull. 93:603-618.
  11. Clarke, M.E., 1984. Feeding behavior of larval walleye pollock Theragra chalcogramma (Pallas), and food availability to larval pollock in the southeastern Bering Sea. University of California, San Diego. 208 p. Ph.D. dissertation.
  12. Dwyer, D.A., K.M. Bailey i P.A. Livingston, 1987. Feeding habits and daily ration of walleye pollock (Theragra chalcogramma) in the eastern Bering Sea, with special reference to cannibalism. Can. J. Fish. Aquat. Sci. 44:1972-1984.
  13. Gorbatenko, K.M. i N.T. Dolganova, 1989. Feeding of sexually mature walleye pollock, Theragra chalogramma, and utilization of the food resources in the Okhotsk Sea during autumn. J. Ichthyol. 29(3):138-145.
  14. Grover, J.J., 1990. Feeding ecology of late-larval and early-juvenile walleye pollock Theragra chalcogramma from the Gulf of Alaska in 1987. Fish. Bull. 88(3):463-470.
  15. Grover, J.J., 1991. Trophic relationships of age-0 and age-1 walleye pollock Theragra chalcogramma collected together in the eastern Bering Sea. Fish. Bull. 89:719-722.
  16. Hamai, I., K. Kyushin i T. Kinoshita, 1974. On the early larval growth, survival and variation of body form in the walleye pollock, Theragra chalcogramma (Pallas), in rearing experiment feeding the different diets. Bull. Fac. Fish. Hokkaido Univ. 25:20-35.
  17. Hinckley, S., 1990. Variation of egg size of walleye pollock Theragra chalcogramma with a preliminary examination of the effect of egg size on larval size. Fish. Bull., U.S. 88:471-483.
  18. Hughes, S.E. i G. Hirschhorn, 1979. Biology of walleye pollock, Theragra chalcogramma, in western Gulf of Alaska, 1973-75. Fish. Bull. 77(1):263-274.
  19. Ishida, T., 1967. Age and growth of Alaska pollock (Theragra chalcogramma, Pallas) in the East Bering Sea. Bull. Hokk. Reg. Fish. Lab. Fish. Agency 32:1-7.
  20. Kachina, T.F. i N.P. Sergeyeva, 1984. Natural mortality in walleye pollock, Theragra chalcogramma (Gadidae), in the eastern part of the Okhotsk Sea. J. Ichthyol. 24(2):159-163.
  21. Kendall, A.W. Jr., L.S. Incze, P.B. Ortner, S.R. Cummings i P.K. Brown, 1994. The vertical distribution of eggs and larvae of walleye pollock, Theragra chalcogramma, in Shelikof Strait, Gulf of Alaska. Fish. Bull. 92:540-554.
  22. Kendall, A.W. Jr., M.E. Clarke, M.M. Yoklavich i G.W. Boehlert, 1987. Distribution, feeding and growth of larval walleye pollock, Theragra chalcogramma, from Shelikof Strait, Gulf of Alaska. Fish. Bull. 85:499-521.
  23. Megrey, B.A., 1991. Population dynamics and management of walleye pollock (Theragra chalcogramma) in the Gulf of Alaska, 1976-1986. Fish. Res. 11:321-354.
  24. Müter, F.-J. i B.L. Norcross, 1994. Distribution, abundance, and growth of larval walleye pollock, Theragra chalcogramma, in an Alaskan fjord. Fish. Bull. 92:579-590.
  25. Nishimura, A. i J. Yamada, 1984. Age and growth of larval and juvenile walleye pollock, Theragra chalcogramma (Pallas), as determined by otolith daily growth increments. J. Exp. Mar. Biol. Ecol. 82:191-205.
  26. Paul, A.J., 1986. Respiration of juvenile pollock, Theragra chalcogramma (Pallas), relative to body size and temperature. J. Exp. Mar. Biol. Ecol. 97:287-293.
  27. Shuntov, V.P., E.P. Dulepova, K.M. Gorbatenko, A.M. Slabinskii i A.Y. Efimkin, 2000. Feeding of the walleye pollack Theragra chalcogramma in the Anadyr-Navarin Region of the Bering Sea. J. Ichthyol. 40(5):370-377.
  28. Sturdevant, M.V., A.L.J. Brase i L.B. Hulbert, 2001. Feeding habits, prey fields, and potential competition of young-of-the-year walleye pollock (Theragra chalcogramma) and Pacific herring (Clupea pallasi) in Prince William Sound, Alaska, 1994-1995. Fish. Bull 99:482-501.
  29. Thompson, J.M., 1981. Preliminary report on the population biology and fishery of walleye pollock Theragra chalcogramma off the coast of Canada. Can. Tech. Rep. Fish. Aquat. Sci. Núm. 1031. 162 p.
  30. Yamashita, Y. i K.M. Bailey, 1989. A laboratory study of the bioenergetics of larval walleye pollock, Theragra chalcogramma. Fish. Bull. 87:525-536.
  31. Yang, M.-S. i P.A. Livingston, 1994. Variations in mean stomach content weights of walleye pollock, Theragra chalcogramma, in the eastern Bering Sea. NOAA Tech. Memo. NMFS-AFSC-36. 32 p.
  32. Koefoed, E., 1956. Theragra finnmarchica n. sp., Gadus poutassou, Risso, Raia spinicauda, Jensen, Eumicrotremus spinosus subsp. nov. eggvinii. Rep. Norwegian Fish. Mar. Inv. v. 11 (núm. 5): 1-24, Pls. 1-3.
  33. Privalikhina, A.M. i G.V. Norvillo, 2010. On the finding of a rare species - Norwegian Pollock Theragra finnmarchica Koefoed, 1956 (Gadidae) - in the Barents Sea. J. Ichthyol. (50) 2:143-147.
  34. BioLib (anglès)
  36. Discover Life (anglès)
  37. World Register of Marine Species (anglès)
  38. FishBase (anglès)
  39. UNEP-WCMC Species Database (anglès)


  • Cohen, D.M., T. Inada, T. Iwamoto i N. Scialabba, 1990. FAO Species Catalogue. Vol. 10. Gadiform fishes of the world (Order Gadiformes). An annotated and illustrated catalogue of cods, hakes, grenadiers and other gadiform fishes known to date. FAO Fish. Synop. 10 (125). 442 p. FAO, Roma. ISBN 92-5-102890-7.

Enllaços externs[modifica]