Transcriptomic response to aquaculture intensification in Nile tilapia.

ABSTRACT: To meet future global demand for fish protein, more fish will need to be farmed using fewer resources, and this will require the selection of nonaggressive individuals that perform well at high densities. Yet, the genetic changes underlying loss of aggression and adaptation to crowding during aquaculture intensification are largely unknown. We examined the transcriptomic response to aggression and crowding in Nile tilapia, one of the oldest and most widespread farmed fish, whose social structure shifts from social hierarchies to shoaling with increasing density. A mirror test was used to quantify aggression and skin darkening (a proxy for stress) of fish reared at low and high densities, and gene expression in the hypothalamus was analysed among the most and least aggressive fish at each d

SUBMITTER: Rodriguez-Barreto D 

PROVIDER: S-EPMC6752142 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature