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Blood oxygen transport, rheology and haematological responses to confinement stress in diploid and triploid Atlantic salmon, Salmo salar
Citation
Sadler, J and Wells, RMG and Pankhurst, PM and Pankhurst, NW, Blood oxygen transport, rheology and haematological responses to confinement stress in diploid and triploid Atlantic salmon, Salmo salar, Aquaculture, 184, (3-4) pp. 349-361. ISSN 0044-8486 (2000) [Refereed Article]
DOI: doi:10.1016/S0044-8486(99)00321-X
Abstract
Diploid and triploid all-female Atlantic salmon (Salmo salar) smolts were challenged with 2.5 h of confinement stress in aerated seawater. Subsequent stress responses were quantified by plasma cortisol, glucose, and lactate, and by the haematological parameters haematocrit (Hct), red blood cell count (RBCC), mean cell volume (MCV), blood haemoglobin concentration (Hb), mean cell haemoglobin (MCH), mean cell haemoglobin concentration (MCHC), total protein and erythrocyte adenosine triphosphate (ATP). The magnitude of stress responses was similar between diploid and triploid smolts. Triploid smolts displayed a higher MCH, but lower Hb than diploid smolts. The blood oxygen affinity of diploid and triploid fish was similar at 15°C over the pH range 6.76-7.99 and the isohaemoglobin components were identical. The enlarged triploid erythrocytes showed reduced shear-dependence on blood viscosity at constant Hct and are therefore unlikely to contribute to greater peripheral vascular resistance. The results show that despite having fewer, larger erythrocytes, triploids have very similar oxygen carrying capacity and haematological response to stress as diploids. This suggests that the higher farm mortality reported for triploids in response to stress is not generated by their failure to show respiratory homeostasis in the face of stress. (C) 2000 Elsevier Science B.V.
Item Details
Item Type: | Refereed Article |
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Research Division: | Agricultural, Veterinary and Food Sciences |
Research Group: | Fisheries sciences |
Research Field: | Aquaculture |
Objective Division: | Animal Production and Animal Primary Products |
Objective Group: | Fisheries - aquaculture |
Objective Field: | Fisheries - aquaculture not elsewhere classified |
UTAS Author: | Sadler, J (Dr Joanne Sadler) |
UTAS Author: | Pankhurst, PM (Dr Tish Pankhurst) |
UTAS Author: | Pankhurst, NW (Professor Ned Pankhurst) |
ID Code: | 18396 |
Year Published: | 2000 |
Web of Science® Times Cited: | 58 |
Deposited By: | TAFI - Aquaculture |
Deposited On: | 2000-08-01 |
Last Modified: | 2011-08-03 |
Downloads: | 0 |
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