Seasonal variation of serum lysozyme levels in Atlantic halibut (Hippoglossus hippoglossus L.).
Serum lysozyme was measured in Atlantic halibut (Hippoglossus hippoglossus L.) kept in a range of different conditions that included ambient photoperiod and temperature and controlled photoperiod and temperature. There was no significant difference between animals held in ambient conditions of 6 degrees C and those held in controlled conditions of 12 degrees C. Similarly, there was no significant difference between animals maintained in a long day photoperiod and those in a short day photoperiod. However, there was a significant difference between summer and winter readings. Whilst this would indicate a link between season and the defence system, there appears to be no link with apparent entrainment to different photoperiods and serum lysozyme levels.
Bowden
T J
TJ
FRS Marine Laboratory, PO Box 101, 375 Victoria Road, Aberdeen AB11 9DB, Scotland, UK. t.j.bowden@marlab.ac.uk
Butler
R
R
Bricknell
I R
IR
D000818:Animals; D005432:Flounder / Q000097:blood*; D008837:Micrococcus; D009113:Muramidase / Q000097:blood*; D009391:Nephelometry and Turbidimetry; D017440:Photoperiod; D012621:Seasons; D013696:Temperature
D009113:Muramidase