Journal of comparative physiology

, Volume 146, Issue 1, pp 123–127 | Cite as

Plasma cortisol measurements in precocious male and nonprecocious male juvenile steelhead trout (Salmo gairdneri)

  • Steven P. Schmidt
  • Edwin W. House


The mean biweekly plasma cortisol levels of juvenile nonmigratory precocious male steelhead trout,Salmo gairdneri, maintained from June through November in our laboratory under natural photoperiodic conditions ranged from 2.4–27.2 μg/dl. Greatest mean cortisol occurred during the month of greatest gonadal mass, suggesting a direct interrenal-testicular relationship in this population of trout. The monthly mean plasma cortisol level of nonprecocious juvenile steelhead males captured prior to their downstream migration to the ocean from an Idaho hatchery and maintained in the laboratory simultaneously with the precocious males was low. For some months plasma cortisol was less than 0.1 μg/dl. In June, however, plasma cortisol in nonprecocious males was 11.0 μg/dl.


Migration Cortisol Human Physiology Cortisol Level Plasma Cortisol 
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  1. Delahunty G, Schreck CB, DeVlaming VL (1980) Effects of photoperiod on plasma corticoid levels in the goldfish,Carassius auratus — role of the pineal. Comp Biochem Physiol [A] 65:355–358Google Scholar
  2. Donaldson EM, Fagerlund UHM (1969) Cortisol secretion rate in gonadectomized female sockeye salmon (Oncorhynchus nerka): Effects of estrogen and cortisol treatment. J Fish Res Board Can 27:1789–1799Google Scholar
  3. Donaldson EM, Fagerlund UHM (1970) Effect of sexual maturation and gonadectomy at sexual maturity on cortisol secretion rate in sockeye salmon (Oncorhynchus nerka). J Fish Res Board Can 27:2287–2296Google Scholar
  4. Fagerlund UHM (1967) Plasma cortisol concentration in relation to stress in adult sockeye salmon during the freshwater stage of their life cycle. Gen Comp Endocrinol 8:197–207Google Scholar
  5. Farmer RW, Pierce CE (1974) Plasma cortisol determination: Radioimmunoassay and competitive protein binding compared. Clin Chem 20:411–414Google Scholar
  6. Foster LB, Dunn RT (1974) Single-antibody technique for radioimmunoassay of cortisol in unextracted serum or plasma. Clin Chem 20:365–368Google Scholar
  7. Hane S, Robertson OH (1959) Changes in plasma 17-hydroxycorticosteroids accompanying sexual maturation and spawning of the Pacific salmon (Oncorhynchus tshawytscha) and rainbow trout (Salmo gairdneri). Proc Natl Acad Sci USA 45:886–893Google Scholar
  8. Olivereau M (1975) Histophysiologie de l'axe hypophysocorticosurrénalien chez le saumon de l'Atlantique (Cycle en eau douce, vie thallassique et reproduction). Gen Comp Endocrinol 27:9–27Google Scholar
  9. Peter RE, Hontela A, Cook AF, Paulencu CR (1978) Daily cycles in serum cortisol levels in the goldfish: effects of photoperiod, temperature, and sexual condition. Can J Zool 56:2443–2448Google Scholar
  10. Robertson OH (1957) Pituitary degeneration and adrenal tissue hyperplasia in spawning Pacific salmon. Science 125:1295–1296Google Scholar
  11. Robertson OH, Wexler BC (1959) Hyperplasia of the adrenal cortical tissue in Pacific Salmon (genus Oncorhynchus) and rainbow trout (Salmo gairdnerii) accompanying sexual maturation and spawning. Endocrinology 65:224–238Google Scholar
  12. Robertson OH, Krupp MA, Thomas SF, Favour CB, Hane S, Wexler BC (1961) Hyperdrenocorticism in spawning migratory and nonmigratory rainbow trout (Salmo gairdnerii); comparison with Pacific salmon (genusOncorhynchus). Gen Comp Endocrinol 1:473–484Google Scholar
  13. Sangalang GB, Freeman HC, Flemming RB, McMenemy M (1980) The determination of cortisol in fish plasma by radioimmunossay. Gen Comp Endocrinol 40:459–462Google Scholar
  14. Schmidt SP, House EW (1979) Precocious sexual development in hatchery-reared and laboratory-maintained male steelhead trout (Salmo gairdneri). J Fish Res Board Can 36:90–93Google Scholar
  15. Singley JA, Chavin W (1975) Serum cortisol in normal goldfish (Carassius auratus). Comp Biochem Physiol [A] 50:77–82Google Scholar
  16. Strange RJ, Schreck CB (1978) Anesthetic and handling stress on survival and cortisol concentration in yearling chinook salmon (Oncorhynchus tshawytascha). J Fish Res Board Can 35:345–349Google Scholar
  17. Utida S, Hirano T, Oide H, Ando M, Johnson DW, Bern HA (1972) The role of the intestine and urinary bladder in teleost osmoregulation. Gen Comp Endocrinol (Suppl) 3:317–327Google Scholar
  18. Wedemeyer B (1969) Stress-induced ascorbic acid depletion and cortisol production in two salmonid fishes. Comp Biochem Physiol 29:1247–1251Google Scholar
  19. Weisbart M, Jenkins DK (1981) Radioimmunoassay of cortisol in the adult Atlantic salmon,Salmo salar L. Gen Comp Endocrinol 43:364–369Google Scholar

Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • Steven P. Schmidt
    • 1
  • Edwin W. House
    • 1
  1. 1.Department of BiologyIdaho State UniversityPocatelloUSA

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