Light colour influences the behaviour and stress physiology of captive tench (Tinca tinca)

Light colour influences the behaviour and stress physiology of captive tench (Tinca tinca) Groups of juvenile tench (7.02 ± 0.28 g) were reared under four different light regimes; blue light, red light (80 Wm−2 12L:12D photoperiod) white light (912 ± 210 lux, 80 Wm−2, 12L:12D photoperiod) and no light (0 lux) (0L:24D). Visibility of fish out of shelters was used as an indicator of activity and was monitored by video recording. Blood plasma cortisol concentrations were also measured. Fish under blue or white light were significantly less active during the photophase than those under red or no light (P < 0.01). Red light produced similar activity patterns to fish receiving 24 h darkness. Plasma cortisol concentrations were also significantly influenced (P < 0.05) with the fish under white light having the highest plasma cortisol concentration (317 ± 62 ng cm−3) compared to fish in the dark treatment (106 ± 36 ng cm−3). Thus, the provision of coloured light filters increases activity in juvenile tench and may reduce their intrinsic stress level. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Reviews in Fish Biology and Fisheries Springer Journals

Light colour influences the behaviour and stress physiology of captive tench (Tinca tinca)

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Publisher
Springer Journals
Copyright
Copyright © 2009 by Springer Science+Business Media B.V.
Subject
Life Sciences; Zoology ; Freshwater & Marine Ecology
ISSN
0960-3166
eISSN
1573-5184
D.O.I.
10.1007/s11160-009-9150-1
Publisher site
See Article on Publisher Site

Abstract

Groups of juvenile tench (7.02 ± 0.28 g) were reared under four different light regimes; blue light, red light (80 Wm−2 12L:12D photoperiod) white light (912 ± 210 lux, 80 Wm−2, 12L:12D photoperiod) and no light (0 lux) (0L:24D). Visibility of fish out of shelters was used as an indicator of activity and was monitored by video recording. Blood plasma cortisol concentrations were also measured. Fish under blue or white light were significantly less active during the photophase than those under red or no light (P < 0.01). Red light produced similar activity patterns to fish receiving 24 h darkness. Plasma cortisol concentrations were also significantly influenced (P < 0.05) with the fish under white light having the highest plasma cortisol concentration (317 ± 62 ng cm−3) compared to fish in the dark treatment (106 ± 36 ng cm−3). Thus, the provision of coloured light filters increases activity in juvenile tench and may reduce their intrinsic stress level.

Journal

Reviews in Fish Biology and FisheriesSpringer Journals

Published: Nov 14, 2009

References

  • Control of reproduction in Nile tilapia Oreochromis niloticus (L.) by photoperiod manipulation
    Biswas, AK; Morita, T; Yoshizaki, G; Maita, M; Takeuchi, T
  • Photoperiod influences the growth, food intake, feed efficiency and digestibility of red sea bream (Pagrus major)
    Biswas, AK; Seoka, M; Inoue, Y; Takii, K; Kumai, H
  • Does light have an influence on fish growth?
    Boeuf, G; Bail, PY

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