In order to explore biotic attraction to structure, we examined how the amount and arrangement of artificial biotic stalks affected responses of a shrimp, Palaemon macrodactylus, absent other proximate factors such as predation or interspecific competition. In aquaria, we tested the effect of differing densities of both un-branched and branched stalks, where the amount of material in the branch...

The objective of this study was to investigate the impact of long-term pyrene exposure on molting and reproduction in the model estuarine invertebrate, the grass shrimp (Palaemonetes pugio). Grass shrimp were exposed to measured concentrations of 5.1, 15.0, and 63. 4 ppb (microg/L) pyrene for 6 weeks, during which time we determined molting and survivorship. At the end of the exposure, we immed...

The use of many psychotropic drugs (PDs) is associated with increased caloric intake, significant weight gain, and metabolic disorders. nematode Caenorhabditis elegans (C. elegans) has been used to study the effects PDs on food intake. However, little known about body fat C. elegans. In elegans, feeding behavior metabolism are regulated through independent mechanisms. This aims evaluate intake ...

HIGHLIGHTS Fluoxetine increases the metabolic rate and excretion of ammonia in both species. O:N ratio fish showed higher values highest concentrations fluoxetine. The LC50 - 96 hour Palaemon pandaliformis represented greater toxicity. Both species are a good biological model for fluoxetine exposure studies.