Water permeability in selected decapod crustacea

Abstract

1. 1. Water influx constants for four decapods were calculated. {A table is presented} 2. 2. The brackish-water species Carcinus maenas and Palaemonetes varians cannot significantly alter their integumental water permeability. 3. 3. Urine volumes, predicted on a water diffusion basis, are two to four times lower than measured urine volumes. 4. 4. Internal water of Carcinus maenas and Macropipus depurator exchanges with the external medium as a two-pool system. © 1967.