Mismatched light and temperature cues disrupt locomotion and energetics via thyroid-dependent mechanisms.

ABSTRACT: Animals integrate information from different environmental cues to maintain performance across environmental gradients. Increasing average temperature and variability induced by climate change can lead to mismatches between seasonal cues. We used mosquitofish (Gambusia holbrooki) to test the hypotheses that mismatches between seasonal temperature and light regimes (short days and warm temperature and vice versa) decrease swimming performance, metabolic rates and mitochondrial efficiency and that the responses to light and temperature are mediated by thyroid hormone. We show that day length influenced thermal acclimation of swimming performance through thyroid-dependent mechanisms. Oxygen consumption rates were influenced by acclimation temperature and thyroid hormone. Mitochondrial

SUBMITTER: Le Roy A 

PROVIDER: S-EPMC7287392 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature