uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Suppression of aggressive behaviour in juvenile Atlantic cod (Gadus morhua) by L-tryptophan supplementation
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Physiology and Developmental Biology. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Physiology and Developmental Biology, Comparative Physiology. jämförande fysiologi. (fiskfysiologi)
Show others and affiliations
2005 (English)In: AQUACULTURE, Vol. 249, no 1-4, 525-531 p.Article in journal (Refereed) Published
Abstract [en]

Aggressive interactions and cannibalism of juvenile Atlantic cod may cause substantial production losses under conditions of intensive rearing. In other teleosts, chronically increased brain concentrations and turnover of the neurotransmitter serotonin (5-hydroxytryptamine, 5-HT) are associated with suppressed aggression. Further, dietary supplementation with the serotonin precursor, L-tryptophan (TRP) suppresses aggression in juvenile rainbow trout (Onchorhyncus mykiss) and reduces cannibalism in juvenile grouper (Epinephelus coioides). In the present study, the behavioural effect of dietary TRP supplementation was observed in pairs of juvenile Atlantic cod subjected to repeated encounters for 10 days. After 3 days, one group was given TRP-supplemented feed (28 g/kg). A significant (P < 0.01) decrease in aggressive acts (from 40 +/- 2.7/ 10 min to 17 +/- 2.0/10 min, mean +/- standard error of mean) was seen after changing to TRP-supplemented feed. The mean number of aggressive acts was also significantly (P<0.05) lower in the TRP-treated group (17 +/- 2.0/10 min) compared to a control group not receiving TRP treatment (29 3.3/10 min). A second experiment examined the effect of TRP-supplemented feed (28 g/kg) on the activity of central 5-HT, quantified as the concentration ratio between the 5-HT metabolite, 5-hydroxyindoleacetic acid (5-HIAA), and 5-HT. In this experiment, the TRP-treated group ([5-HIAA]/[5-HT]=0.56 +/- 0.04) showed elevated values (P<0.038) compared with the control group ([5-HIAA]/[5-HT]=0.43 +/- 0.03). In conclusion, this study shows that juvenile Atlantic cod are highly aggressive and that supplementing the feed with TRP affects central 5-HT signalling systems and reduces this behaviour. (c) 2005 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2005. Vol. 249, no 1-4, 525-531 p.
Keyword [en]
juvenile cod; aggression; tryptophan; brain; serotonin
Identifiers
URN: urn:nbn:se:uu:diva-77028OAI: oai:DiVA.org:uu-77028DiVA: diva2:104940
Available from: 2006-10-16 Created: 2006-10-16 Last updated: 2011-01-11

Open Access in DiVA

No full text

Authority records BETA

Winberg, Svante

Search in DiVA

By author/editor
Winberg, Svante
By organisation
Department of Physiology and Developmental BiologyComparative Physiology

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 552 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf