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EFFECTS OF ANDROGEN...
EFFECTS OF ANDROGENS AND CORTISOL ON GILL ION TRANSPORTERS AND OMSMOREGULATORY CAPACITY IN ATLANTIC SALMON (SALMO SALAR)
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Nilsen, Tom Ole (author)
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Andersson, Eva (author)
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- Sundh, Henrik, 1976 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences
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Taranger, Geir Lasse (author)
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Schultz, R (author)
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- Sundell, Kristina, 1959 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences
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Ebbeson, L.O.E (author)
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Handeland, S.O. (author)
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Stefansson, S.O. (author)
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(creator_code:org_t)
- 2014
- 2014
- English.
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In: ICBF 2014, Edinburgh.
- Related links:
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https://gup.ub.gu.se...
Abstract
Subject headings
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- Sex steroids have been reported to compromise ion homeostasis in teleosts, yet there is limited and somewhat contradicting knowledge about the mechanisms through which androgens impact osmoregulatory capacity in salmonids. Immature Atlantic salmon post-smolts in seawater (SW) were injected with 11-ketoandrostenedione (OA; 25 µg/g BW), cortisol (F; 25 µg/g BW), F+OA (25 µg/g BW) and sham control (CON). After 8 days treatment, androgen treated fishdemonstrated a striking transcriptional increase in freshwater (FW)-type of ion transporters (NKA α1a ) , concurrent with no apparent ion perturbations, or down regulation of SW gill ion-transporters (NKA α1b). F treated post-smolts displayed increased gill NKA α1a transcription, with an additive effect of F+OA.. Moreover, F also resulted in decreased transcription of NKA α1b whilst fish treated with combinations of F and OA experienced severe ion perturbations and mortalities in SW, while no mortality occurred when only F was administered. Our findings suggests that androgens have, either directly or indirectly, a role in remodelling the gill epithelia for FW entry, rather than leading to osmoregulatory dysfunction in SW acclimated post-smolts. Moreover, maturing post-smolts may be sensitive to stress since combinations of elevated androgens and cortisol levels may have detrimental effects on homeostasis and fish welfare.
Subject headings
- NATURVETENSKAP -- Biologi -- Zoologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Zoology (hsv//eng)
Publication and Content Type
- vet (subject category)
- kon (subject category)
To the university's database
- By the author/editor
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Nilsen, Tom Ole
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Andersson, Eva
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Sundh, Henrik, 1 ...
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Taranger, Geir L ...
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Schultz, R
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Sundell, Kristin ...
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show more...
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Ebbeson, L.O.E
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Handeland, S.O.
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Stefansson, S.O.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Zoology
- Articles in the publication
- ICBF 2014, Edinb ...
- By the university
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University of Gothenburg