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Oxygen bioavailability and haemoglobins in the brine shrimpArtemia franciscana

✍ Scribed by Bart Wachter; Ronny Blust; Walter Decleir

Book ID: 104733039
Publisher: Springer-Verlag
Year: 1992
Tongue: English
Weight: 753 KB
Volume: 113
Category: Article
ISSN: 0025-3162
DOI: 10.1007/bf00347271

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✦ Synopsis

Bioavailability of oxygen for the saline-water invertebrate Artemiafranciscana was studied, since both oxygen concentration and oxygen diffusion rate change with salinity. Total haemoglobin concentration and the relative contribution of each of three haemoglobins was measured in specimens acclimated to different salinities and oxygen concentrations. Both haemoglobin concentration and contribution were influenced by salinity and the group observed (males, females with and females without eggs). Multiple regression analysis showed that total haemoglobin concentration was better correlated with oxygen concentration than oxygen partial pressure. The relative proportions of haemoglobins 1, 2 and 3 were better correlated with oxygen partial pressure than oxygen concentration. These results are related to the oxygen carrying capacity and oxygen affinity of the haemolymph. Our results show that oxygen bioavailability in a saline-water environment depends on the response (relative contribution of Hbl, Hb2 and Hb3 or total haemoglobin concentration) that is studied. They also show that oxygen concentration and oxygen partial pressure have a different physiological impact on brine shrimp.

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