Abstract
Serotonin is an important modulator of feeding behavior across animal species. In invertebrates, much is known about the regulation of feeding in several model organisms, but comparative data are limited. We examined the modulation of feeding behavior in crayfish by administering serotonin and two serotonin receptor ligands, mianserin and 5-carboxamidotryptamine. We found that, compared to control injections, exogenous serotonin significantly reduced appetitive behaviors in response to a chemical food stimulant and reduced consumption when food was present. The two ligands also significantly reduced the amount of food consumed. However, they had no significant effects on appetitive feeding movements, suggesting that appetitive and consummatory feeding phases may be regulated by different serotonergic mechanisms. (PsycInfo Database Record (c) 2022 APA, all rights reserved).
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