Abstract
1. 1. The uptake of hexoses from dilute solutions in seawater by postlarval penaeid shrimp was measured at salinities from 10–40%. 2. 2. Uptake of d-mannitol was less than that of d-glucose but greater than that of both l-glucose and 3- O-methyl- d-glucose, which did not significantly differ. 3. 3. Preincubation in antibiotics reduced the uptake of both d-glucose and d-mannitol to the level of l-glucose uptake. 4. 4. The greater uptake of d-mannitol than l-glucose and the reduction of the uptakes of d-glucose and d-mannitol by preincubation in antibiotics suggest that bacteria are involved in the uptake of d-glucose and d-mannitol. 5. 5. Linear regression of the uptakes of both d-glucose and d-mannitol onto bacterial levels associated with the shrimp indicate that quantitative variations in bacterial levels can account for differences in the magnitude of uptake between different groups of shrimp.
Published Version
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