Preprint volume - SIBM

Pre-print Volume – Posters
AQUACULTURE COMMITEE
Results and conclusions – Starvation caused a general, although not significant,
decrease of digestive enzymes, with an earlier recovery (on T2) to initial values for
total proteases in the midgut and delayed (on T3) for amylase and lipase (Tab. 1).
Reversibility was also observed in Atlantic salmon (Krogdahl & Bakke-McKellep,
2005) and in sturgeon and in trout (Furné et al., 2008). No significant changes in
haematological and biochemical parameters were observed. This suggested the good
resistance of red porgy to short-term starvation.
Tab. 1 - Specific digestive enzyme activities (U/mg protein) of Pagrus pagrus.
Attività specifica (U/mg proteina) degli enzimi digestivi di Pagrus pagrus.
Starved - refed group Fed group
Times Stomach Proximal Midgut Distal gut Stomach Proximal Midgut Distal gut
gut
gut
Total proteases
T0 0,583 0,739 0,336 0,778
T1 0,468 0,320 0,440 0,465 0,879 1,079 1,041 0,724
T2 0,617 0,266 0,668 0,430 1,936 1,155 1,145 1,997
T3
Amylase
1,045 0,802 0,911 0,511 2,004 1,676 2,269 2,601
T0 0,129 0,205 0,026 0,061
T1 0,021 0,063 0,034 0,007 0,124 0,104 0,040 0,025
T2 0,017 0,104 0,029 0,018 0,113 0,201 0,044 0,109
T3
Lipase
0,031 0,186 0,026 0,065 0,230 0,297 0,049 0,147
T0 0,006 0,0008 0,0009
T1 0,001 0,0002 0,0007 0,001 0,0007 0,0014
T2 0,001 0,0005 0,0011 0,003 0,0014 0,0071
T3 0,004 0,0007 0,0036 0,010 0,0101 0,0070
References
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haematological, biochemical, non-specific immune parameters and skin structure. Fish Physiol.
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FURNÈ M., GARCIA-GALLEGO M., HIDALGO M.C., MORALES A.E., DOMEZAIN A.,
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Physiol. Part A, 149: 420-425.
KROGDHAL A., BAKKE-MCKELLEP A.M. (2005) - Fasting and re-feeding cause rapid changes in
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