The unexpected loss of the "hunger hormone" ghrelin in true passerines: A game changer in migration physiology
S. Prost, J. P. Elbers, J. Slezacek, S. Fuselli, S. Smith, L. Fusani
The paper shows that true passerines lost the ghrelin gene but retain its receptor, suggesting a replacement ligand for migratory fat accumulation.
bioRxiv · May 23, 2023Evolutionary Biology