Triiodothyronine and thyroxine changes in yearling sea trout (Salmo trutta L.) during spring

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Abstract

Triiodothyronine and thyroxine levels and morphological parameters of fish were studied from January to May to evaluate the smoltification of yearling sea trout (Salmo trutta L.) raised in two different rearing systems (recirculating and flow-through) in three different hatcheries in Latvia. Thyroid hormone levels increased from January to May in both rearing systems in fish of different sizes. There was positive correlation between the degree of silvering and fish fork length and thyroid hormone levels, but there was no correlation between condition facor and thyroid hormone levels. Fish reared in recirculating systems were significantly larger (p < 0.05) and exhibited more visible signs of smoltification earlier than those reared in flow-through systems. The thyroid hormone levels and degree of silvering gradually became nearly the same by May in the sea trout from both rearing systems. Changes in thyroid hormone levels or fish size in spring cannot be evaluated separately from other signs to determine smoltification.

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  • Berrill I.K. Porter M.J.R. Bromage N.R. 2006 – The effects of daily ration on growth and smoltification in 0+ and 1+ Atlantic salmon (Salmo salar) parr – Aquaculture 257: 470-481.

  • Birt T.P. Green J.M. 1986 – Parr-smolt transformation in female and sexually mature male anadromous and nonanadromus Atlantic salmon Salmo salar – Can. J. Fish. Aquat. Sci. 43: 680-686.

  • Birzaks J. Peslaks J. Urtāńs Ē. Aleksējevs Ē. 1997 – Piekrastes un iekšējo ūdeņu zivis – In: Latvijas zivsaimniecības gadagrāmata 1996/97 (Ed.) N. Riekstiņš Zivju fonds Riga: 135-160.

  • Björnsson B.T. Stefansson S.O. McCormick S.D. 2011 – Environmental endocrinology of salmon smoltification – Gen. Comp. Endocr. 170: 290-298.

  • Davidsen J.G. Daverdin M. Sjursen A.D. Rønning L. Arnekleiv J.V. Koksvik J.I. 2014 – Does reduced feeding prior to release improve the marine migration of hatchery brown trout Salmo trutta smolts? – J. Fish Biol. 85: 1992-2002.

  • Dębowski P. Glogowski J. Robak S. Dobosz S. 1999 – Smoltification of hatchery-reared Atlantic Salmon (Salmo salar L.) – indices and methods of estimation – Arch. Pol. Fish. 7: 267-279.

  • Dębowski P. Dobosz S. Grudniewska J. Kuzminski H. 2010 – Possibilities of using the length differentiation of hatchery sea trout Salmo trutta L. parr to predict numbers of one-year smolts – Arch. Pol. Fish. 18: 51-58.

  • Dickhoff W.W. Folmar L.C. Gorbman A. 1978 – Changes in plasma thyroxine during smoltification of coho salmon Oncorhynchus kisutch – Gen. Comp. Endocr. 36: 229-232.

  • Ebbesson L.O.E. Ekstrom P. Ebbesson S.O.E. Stefansson S.O. Holmqvist B. 2003 – Neural circuits and their structural and chemical reorganization in the light-brain-pituarity axis during parr-smolt transformation in salmon – Aquaculture 222: 59-70.

  • Ebbesson L.O.E. Bjornsson B.Th. Ekstrom P. Ebbesson S.O.E. Stefansson S.O. 2008 – Daily endocrine profiles in parr and smolt Atlantic salmon – Comp. Biochem. Physiol A 151: 698-704.

  • Ebbesson L.O.E. Nilson T.O. Helvik J.V. Tronci V. Stefansson S.O. 2011 – Corticotropin-releasing factor neurogenesis during midlife development in salmon: genetic environmental and thyroid hormone regulation – J. Neuroendocrinol. 23: 733-741.

  • Folmar L.C. Dickhoff W.W. 1980 – The parr-smolt transformation (smoltification) and seawater adaptation in salmonids: A review of selected literature – Aquaculture 21: 1-37.

  • Griffith R.W. 1974 – Pituitary control of adaption to fresh water in the teleost genus Fundulus – Biol. Bull. 146: 357-376.

  • Hoar W.S. 1988 – The physiology of smolting salmonids – In: Fish Physiology Volume 11B (Eds.) W.S. Hoar D.J. Randall Academic Press New York: 275-343.

  • Holzer G. Laudet V. 2015 – Thyroid Hormones: A Triple-Edged Sword for Life History Transitions – Curr. Biol. 25: 344-347.

  • Jones D.A. Bergman E. Greenberg L.A. 2015 – Food availability in spring affects smolting in brown trout (Salmo trutta) – Can. J. Fish. Aquat. Sci. 72: 1649-1699.

  • Jonsson N. Jonsson B. 2003 – Energy density and content of Atlantic salmon: variation among developmental stages and types of spawners – Can. J. Fish. Aquat. Sci. 60: 506-516.

  • Katz A.H. Katz H.M. 1978 – Effects of DL-thyroxine on swimming speed in pearl danio Brachydanio albolineatus (Blyth.) – J. Fish Biol. 12: 527-530.

  • Lans L. Greenberg L.A. Karlsson J. Calles O. Schmitz M. Bergman E. 2011 – The effects of ration size on migration by hatchery-raised Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) – Ecol. Freshw. Fish. 20: 548-557.

  • Larsson S. Serrano I. Eriksson L.O. 2012 – Effects of muscle lipid concentration on wild and hatchery brown trout (Salmo trutta) smolt migration – Can. J. Fish. Aquat. Sci. 69: 1-12.

  • Medne R. 2011 – Research of clinical signs and etiological factor of salmon fin necrosis PhD thesis Jelgava: 125 p.

  • McCormick S.D. Björnsson B.T. 1994 – Physiological and hormonal differences among Atlantic salmon parr and smolts reared in the wild and hatchery smolts – Aquaculture 121: 235-244.

  • McCormick S.D. Björnsson B.T. Sheridan M. Eilerson C. Carey J.B. O’Dea M. 1995 – Increased daylength stimulates plasma growth hormone and gill Na+ K+-ATPase in Atlantic salmon (Salmo salar) – J. Comp. Physiol. 165: 245-254.

  • McCormick S.D. 2013 – Smolt physiology and endocrinology – In: Euryhaline Fishes Fish Physiology Volume 32 (Eds.) S.D. McCormick A.P. Farrell C.J. Brauner Academic Press Amsterdam: 199-251.

  • McCormick S.D. Haro A. Lerner D.T. O’Dea M.F. Regish A.M. 2014 – Migratory patterns of hatchery and stream-reared Atlantic salmon Salmo salar smolts in the Connecticut River U.S.A. – J. Fish Biol. 85: 1005-1022.

  • Munakata A. Miura G. Matsuda H. 2014 – Evaluation of seasonal and daily changes of plasma thyroxine and cortisol levels in wild masu salmon Oncorhynchus masou samples by a Japanese fishing method – J. Fish Biol. 85: 1253-1262.

  • Näslund J. Sundström L.F. Johnsson J.I. 2017 – Autumn food restriction reduces smoltification rate but not over-winter survival in juvenile brown trout Salmo trutta – Ecol. Freshw. Fish. 26: 205-216.

  • Ojima D. Iwata M. 2009 – Central administration of growth hormone-releasing hormone triggers downstream movement and schooling behavior of chum salmon (Onchorhynchus keta) fry in an artificial stream – Comp. Biochem. Physiol. 152: 293-298.

  • Olsson I.C. Greenberg L.A. Eklov A.G. 2001 – Effect of an artificial pond on migrating brown trout smolts – N. Am. J. Fish. Manage. 21: 498-506.

  • Osborn R.H. Simpson T.H. Youngson A.F. 1978 – Seasonal and diurnal rhythms of thyroidal status in the rainbow trout Salmo gairdneri Richardson – J. Fish Biol. 12: 531-540.

  • Quigley D.T.G. Harvey M.J. Hayden T.J. Dowling C. O’Keane M.P. 2006 – A comparative study of smoltification in sea trout (Salmo trutta L.) and Atlantic salmon (Salmo salar L.): seawater tolerance and thyroid hormone titres – Biology and Environment: Proceedings of the Royal Irish Academy 106: 35-47.

  • Rutkovska I. Medne R. 2015 – Morphological changes in artificially reared one year old sea trout (Salmo trutta L.) during spring – Research for Rural Development. Annual 21st International Scientific Conference proceedings Vol. 1 Jelgava 13-15.05.2015 Latvia University of Agriculture Jelgava: 189-193.

  • Soivio A. Muona M. Virtanen E. 1989 – Smolting of two populations of Salmo trutta – Aquaculture 82: 147-53.

  • Sokal R.R. Rohlf F.J. 2000 – Biometry: the principles and practice of statistics in biological research (3rd ed.) – W.H. Freeman and company New York 879 p.

  • Stefansson S.O. Bjornsson B.T. Sundell K. Nyhammer G. McCormick S.D. 2003 – Physiological characteristics of wild Atlantic salmon post-smolts during estuarine and coastal migration – J. Fish Biol. 63: 942-955.

  • Vainikka A. Huusko R. Hyvarinen P. Korhonen P.K. Laaksonen T. Koskela J. Vielma J. Hirvonen H. Salminen M. 2012 – Food restriction prior to release reduces precocious maturity and improves migration tendency of Atlantic salmon (Salmo salar) smolts – Can. J. Fish. Aquat. Sci. 69: 1981-1993.

  • Wedemeyer G.A. Saunders R.L. Clarke W.C. 1980 – Environmental factors affecting smoltification and early marine survival of anadromous salmonids – Mar. Fish. Rev. 42: 1-14.

  • Zydlewski G.B. Stich D.S. McCormick S.D. 2014 – Photoperiod control of downstream movements of Atlantic salmon Salmo salar smolts – J. Fish Biol. 85: 1023-1041.

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