caa a22 4500 465763642 CHVBK 20180323111907.0 cr unu---uuuuu 170327e19900201xx s 000 0 eng 10.1007/BF00238426 doi (NATIONALLICENCE)springer-10.1007/BF00238426 Salinity tolerance and osmoregulation of the arctic marine amphipods Onisimus litoralis (Kroyer) and Anonyx nugax (Phipps) [Elektronische Daten] [James Shea, Jonathan Percy] Summary: The gammarid amphipod Onisimus litoralis, which inhabits arctic and subarctic intertidal and under-ice habitats, is a euryhaline hyperosmotic regulator. It survives 10 d exposures to salinities from 5 to 55 ppt. It hyperregulates its hemolymph osmolality during 3 h exposures to dilutions of 33 ppt seawater and remains hyperosmotic for at least 2 w. The hemolymph is isosmotic to the medium after 12 h exposures to salinities higher than ≈33 ppt. The gammarid amphipod Anonyx nugax, which inhabits arctic and subarctic subtidal areas, tolerates salinities from 23 to 45 ppt with little mortality. Unlike Onisimus, however, it is an osmoconformer and its hemolymph becomes isosmotic to all dilute salinities within its tolerance range after 12 h and to concentrated media after 3 h. The salinity tolerances and osmoregulatory abilities of both species are reflected in their distributions in the field. Springer-Verlag, 1990 Shea James Institute of Oceanography, McGill University, H3A 2B2, Montreal, Canada aut Percy Jonathan Department of Fisheries and Oceans Canada, Arctic Biological Station of the Maurice Lamontagne Institute, 555 Boul. St., H9X 3R4, Pierre, Ste-Anne-de-Bellevue, Canada aut Polar Biology Springer-Verlag 10/4(1990-02-01), 275-281 0722-4060 10:4<275 1990 10 300 https://doi.org/10.1007/BF00238426 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00238426 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shea James Institute of Oceanography, McGill University, H3A 2B2, Montreal, Canada aut NATIONALLICENCE 700 1- Percy Jonathan Department of Fisheries and Oceans Canada, Arctic Biological Station of the Maurice Lamontagne Institute, 555 Boul. St., H9X 3R4, Pierre, Ste-Anne-de-Bellevue, Canada aut NATIONALLICENCE 773 0- Polar Biology Springer-Verlag 10/4(1990-02-01), 275-281 0722-4060 10:4<275 1990 10 300 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer