AI Article Synopsis
- Recent studies indicate that Mediterranean fish, specifically white sea bream (Diplodus sargus), are impacted by compounds from invasive marine species due to food web interactions.
- The invasive alga Caulerpa cylindracea contains a bioactive compound called caulerpin (CAU), which is linked to behavioral changes such as reduced aggressiveness in D. sargus.
- Further investigation reveals that fish consuming CAU-rich diets show increased expression of the neuropeptide Y (NPY) in their brains, shedding light on the underlying neural mechanisms influencing their behavior.
Article Abstract
Recent studies have suggested that Mediterranean indigenous fish species are affected by bioactive metabolites coming from marine invasive species via food web interactions. In particular, both physiological and behavioural changes in the white sea bream Diplodus sargus were related to caulerpin (CAU), a bisindolic alkaloid particularly abundant in the invasive alga Caulerpa cylindracea, on which the fish actively feed. Dietary administration of CAU decreased aggressiveness in D. sargus, suggesting an anxiolytic-like effect of CAU possibly mediated by endogenous anxiolytic agents. This hypothesis is supported here by the finding of a significant increase of NPY transcriptional expression in the brain of fish fed with CAU enriched food, shedding more light on the neural mechanisms behind the altered behaviour of D. sargus.
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| http://dx.doi.org/10.1007/s00359-019-01322-8 | DOI Listing |
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