A study of strontium, magnesium, and calcium in the environment and exoskeleton of decapod crustaceans, with special reference to Uca burgersi on barbuda, west Indies

Analyses of samples from Barbuda, Leeward Islands, show that the strontium/calcium atom ratio of the exoskeleton of the fiddler crab Uca burgersi Holthuis is proportional to that of the environment, whilst the atom ratio magnesium/calcium of the exoskeleton is fairly constant regardless of the environmental ratio.