Comparison of the osmoregulatory capabilities of two portunid crabs,Callinectes sapidus and C. similis |
| |
Authors: | D W Engel |
| |
Institution: | (1) Southeast Fisheries Center, Beaufort Laboratory, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Beaufort, North Carolina, USA |
| |
Abstract: | An investigation of the osmoregulatory capabilities of two portunid crabs, Callinectes sapidus and C. similis, was conducted to determine if their differences in distributional patterns were reflected in their capacity to adjust physiologically to changes in salinity. After acclimation to 5, 20 and 35 S, measurements of hemolymph and muscle concentrations of Na+, Cl- and K+ and muscle-free amino acids indicated that C. sapidus is a better osmoregulator at low salinity than C. similis, while both species osmoregulate equally well at high salinity. This difference in osmoregulatory capacity corresponds well with their distribution in coastal-plain estuaries.This research was supported under agreement (49-7)-5 between the National Marine Fisheries Service and the Energy Research and Development Administration.Communicated by M.R. Tripp, Newark |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|