caa a22 4500 465826466 CHVBK 20180323112150.0 cr unu---uuuuu 170327e19900401xx s 000 0 eng 10.1007/BF00258766 doi (NATIONALLICENCE)springer-10.1007/BF00258766 Osmoregulation in Corophium curvispinum (Crustacea: Amphipoda), a recent coloniser of freshwater [Elektronische Daten] III. Evidence for adaptive changes in sodium regulation [R. Harris, D. Bayliss] Summary: Sodium efflux in three populations of the freshwater amphipod Corophium curvispinum were measured seasonally over a 6-year period and compared to rates recorded in 1980. While continuing to show relatively high Na+ loss rates, compared to other freshwater amphipod species, sodium permeability (PNa) has decreased significantly in the medium term (post 1983). PNa also shows seasonal fluctuations in all populations. Changes in body sodium content (BNa) and blood [Na+] were found during this period and some alteration of the kinetic characteristics, K m and V max, of the sodium uptake system has occurred. Acclimation to different [Na+] media, and to low and high temperatures produced significant changes in Na+ efflux. The importance of acclimation (acclimatization) and selection in reducing passive Na+ loss and effecting changes in Na+ regulation of this colonizing species are assessed in relation to environmental changes. Springer-Verlag, 1990 Sodium regulation nationallicence Adaptive change nationallicence Freshwater crustacean nationallicence Harris R. Department of Zoology, University of Leicester, LE1 7RH, Leicester, England aut Bayliss D. Department of Zoology, University of Leicester, LE1 7RH, Leicester, England aut Journal of Comparative Physiology B Springer-Verlag 160/1(1990-04-01), 85-92 0174-1578 160:1<85 1990 160 360 https://doi.org/10.1007/BF00258766 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00258766 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Harris R. Department of Zoology, University of Leicester, LE1 7RH, Leicester, England aut NATIONALLICENCE 700 1- Bayliss D. Department of Zoology, University of Leicester, LE1 7RH, Leicester, England aut NATIONALLICENCE 773 0- Journal of Comparative Physiology B Springer-Verlag 160/1(1990-04-01), 85-92 0174-1578 160:1<85 1990 160 360 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer