The physiological response of chinook salmon smolts to two methods of radio-tagging

Publication: Research - peer-reviewJournal article – Annual report year: 2001

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The physiological response of chinook salmon smolts to two methods of radio-tagging. / Jepsen, Niels; Davis, L.E.; Schreck, C.B.; Siddens, B.

In: Transactions of the American Fisheries Society, Vol. 130, No. 3, 2001, p. 495-500.

Publication: Research - peer-reviewJournal article – Annual report year: 2001

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Author

Jepsen, Niels; Davis, L.E.; Schreck, C.B.; Siddens, B. / The physiological response of chinook salmon smolts to two methods of radio-tagging.

In: Transactions of the American Fisheries Society, Vol. 130, No. 3, 2001, p. 495-500.

Publication: Research - peer-reviewJournal article – Annual report year: 2001

Bibtex

@article{432dca6eb0964dc3a2a98fc25798abcf,
title = "The physiological response of chinook salmon smolts to two methods of radio-tagging",
publisher = "American Fisheries Society",
author = "Niels Jepsen and L.E. Davis and C.B. Schreck and B. Siddens",
year = "2001",
volume = "130",
number = "3",
pages = "495--500",
journal = "Transactions of the American Fisheries Society",
issn = "0002-8487",

}

RIS

TY - JOUR

T1 - The physiological response of chinook salmon smolts to two methods of radio-tagging

A1 - Jepsen,Niels

A1 - Davis,L.E.

A1 - Schreck,C.B.

A1 - Siddens,B.

AU - Jepsen,Niels

AU - Davis,L.E.

AU - Schreck,C.B.

AU - Siddens,B.

PB - American Fisheries Society

PY - 2001

Y1 - 2001

N2 - Smolts of hatchery-reared chinook salmon Oncorhynchus tshawytscha were radio-tagged by gastric insertion or surgical implant, and their physiological response was measured and compared to that of control insertion or surgical implant, and their physiological response was measured and compared to that of control fish. Plasma levels of cortisol, glucose, and lactate were measured before tagging and at 3 h, 24 h, 7 d, and 14 d after tagging. Significant increases in concentrations of cortisol, glucose, and lactate occurred at 3 h after tagging in both treatment groups. After 24 h cortisol levels were still elevated in both groups of tagged fish, whereas the levels of glucose and lactate had returned to normal for the surgically implanted fish but still remained higher than those of the controls for gastrically implanted fish. After 7 and 14 d, differences between treatment and control fish were not significant. Body size and physiological response to tagging among fish 14-26 cm showed no correlation. The results show that radio-tagging is indeed stressful for chinook salmon smolts but that the presence of the tags is not chronically stressful because levels of cortisol, glucose, and lactate return to normal (control) levels after few days.

AB - Smolts of hatchery-reared chinook salmon Oncorhynchus tshawytscha were radio-tagged by gastric insertion or surgical implant, and their physiological response was measured and compared to that of control insertion or surgical implant, and their physiological response was measured and compared to that of control fish. Plasma levels of cortisol, glucose, and lactate were measured before tagging and at 3 h, 24 h, 7 d, and 14 d after tagging. Significant increases in concentrations of cortisol, glucose, and lactate occurred at 3 h after tagging in both treatment groups. After 24 h cortisol levels were still elevated in both groups of tagged fish, whereas the levels of glucose and lactate had returned to normal for the surgically implanted fish but still remained higher than those of the controls for gastrically implanted fish. After 7 and 14 d, differences between treatment and control fish were not significant. Body size and physiological response to tagging among fish 14-26 cm showed no correlation. The results show that radio-tagging is indeed stressful for chinook salmon smolts but that the presence of the tags is not chronically stressful because levels of cortisol, glucose, and lactate return to normal (control) levels after few days.

KW - Individ- og populationsinteraktioner

JO - Transactions of the American Fisheries Society

JF - Transactions of the American Fisheries Society

SN - 0002-8487

IS - 3

VL - 130

SP - 495

EP - 500

ER -