Abstract
The presence of macromolecular antifreezes (thermal hysteresis factors) in blood serum and gut fluids of marine teleost fishes from West Greenland waters was investigated in August 1997, during a NorFa Fish Physiology Course.
Thermal hysteresis in oc in the serum of five shallow water {depth < 50 m) species was: Anisarcus medius (1.27), Pholis fasciatus (0.51±0.27), Gymnachantus tricuspis (0.50±0.11), Myoxocephalus scorpius (0.42) and Gadus ogac (0.40±0.09). O n ly two of the species caught in deep water (depth 300-500 m), Boreogadus saida and Leptoclinus maculatus, showed considerable thermal hysteresis of 0.87 o c and 0.98 oc, respectively. No thermal hysteresis was found in three shallow water species (Ammodytes dubius, Gadus morhua and Anarchias lupus) and eight species caught in deep water (300-500 m): Mallotus villosus, Artedielius atlanticus, Leptagonus decagonus, Sebastes sp., Liparis gibbus, Caraproctus fabrici, Lycodes seminudus and Lycodes vah/i).
This is probably the first time that thermal hysteresis has been reported for Leptoclinus maculatus, Anisarcus medius, Pho/is fasciatus and Gymnachantus tricuspis.
Thermal hysteresis in oc in the serum of five shallow water {depth < 50 m) species was: Anisarcus medius (1.27), Pholis fasciatus (0.51±0.27), Gymnachantus tricuspis (0.50±0.11), Myoxocephalus scorpius (0.42) and Gadus ogac (0.40±0.09). O n ly two of the species caught in deep water (depth 300-500 m), Boreogadus saida and Leptoclinus maculatus, showed considerable thermal hysteresis of 0.87 o c and 0.98 oc, respectively. No thermal hysteresis was found in three shallow water species (Ammodytes dubius, Gadus morhua and Anarchias lupus) and eight species caught in deep water (300-500 m): Mallotus villosus, Artedielius atlanticus, Leptagonus decagonus, Sebastes sp., Liparis gibbus, Caraproctus fabrici, Lycodes seminudus and Lycodes vah/i).
This is probably the first time that thermal hysteresis has been reported for Leptoclinus maculatus, Anisarcus medius, Pho/is fasciatus and Gymnachantus tricuspis.
| Original language | English |
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| Number of pages | 8 |
| Publication status | Published - 1997 |
| Event | NorFA-course at the Arctic Station - University of Copenhagen in Godhavn, Greenland Duration: 8 Aug 1997 → 22 Aug 1997 |
Publication series
| Name | ARCTIC FISH PHYSIOLOGY. Report from a NorFA-course at the Arctic Station, University of Copenhagen in Godhavn, Greenland 8-22 August 1997 |
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Keywords
- antifreeze activity
- Disko Bay
- Disko Fjord
- Greenland
