CTmax is repeatable and doesn't reduce growth in zebrafish.

ABSTRACT: Critical thermal maximum (CTmax) is a commonly and increasingly used measure of an animal's upper thermal tolerance limit. However, it is unknown how consistent CTmax is within an individual, and how physiologically taxing such experiments are. We addressed this by estimating the repeatability of CTmax in zebrafish, and measured how growth and survival were affected by multiple trials. The repeatability of CTmax over four trials was 0.22 (0.07-0.43). However, CTmax increased from the first to the second trial, likely because of thermal acclimation triggered by the heat shock. After this initial acclimation response individuals became more consistent in their CTmax, reflected in a higher repeatability measure of 0.45 (0.28-0.65) for trials 2-4. We found a high innate thermal tolerance led t

SUBMITTER: Morgan R 

PROVIDER: S-EPMC5940882 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature