The effect of reduced salinity on tissue and plasma composition of the dogfish,Squalus acanthias |
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| Affiliation: | 1. Department of Urology, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kong Jiang Road, Shanghai 200092, China;2. Department of Urology, An Hui Provincial Hospital, 17 Lu Jiang Road, Hefei, Anhui 230001, China;1. Aix Marseille University, , Avignon University, CNRS, IRD, IMBE, Station Marine d''Endoume, Chemin de la Batterie des Lions, 13007 Marseille, France;2. DiSTAV (Department of Earth, Environment and Life Sciences), University of Genoa, Corso Europa 26, 16132 Genoa, Italy;3. Marine Protected Area of Portofino, Viale Rainusso 1, 16038 Santa Margherita Ligure, Italy;4. Regione Liguria, Settore Sviluppo Sostenibile, Parchi e Biodiversità, Via D''Annunzio 111, 16121 Genoa, Italy |
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| Abstract: | - 1.1. Dogfish (Squalus acanthias) were acclimated to reduced salinities and their plasma, muscle tissue and erythrocytes subsequently analysed.
- 2.2. Decrease in the osmolarity of the plasma was principally due to a fall in urea concentration and a significant fall in the concentrations of sodium and chloride.
- 3.3. Changes in the muscle and erythrocytes in dilute media were a decrease in urea, potassium, sodium and chloride concentrations.
- 4.4. The concentrations of the free amino acids in the muscle and the red blood cells decreased more than would be expected by the movements of water only.
- 5.5. The results were discussed in relation to the regulation of cellular volume and the involvement of the free amino acid pool of the tissues in this process.
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