Length–weight relationships and growth parameters of two endemic fish species ( Floridichthys polyommus Hubbs, 1936 and Fundulus persimilis Miller, 1955) from the Yucatan Peninsula, Mexico

Summary This study reports length‐weight relationships and growth parameters for Floridichthys polyommus Hubbs, 1936 and Fundulus persimilis Miller, 1955 from La Carbonera, a karstic tropical coastal lagoon on the northwestern coast of the Yucatan Peninsula, Mexico. Specimens were collected between April 2009 and March 2010. The resulting length‐weight relationship for F. polyommus was: W = 0.0180 Lt 3.37 and W = 0.0142 Lt 3.35 for F. persimilis . This study presents the first estimation for both species of the von Bertalanffy growth model parameters, the growth performance index, the L 50 , and is the first report of the length‐weight relationship for F. persimilis .