Relationships between otolith size and fish length in some mesopelagic teleosts (Myctophidae, Paralepididae, Phosichthyidae and Stomiidae)

Length-mass relationships and linear regressions are given for otolith size (length and height) and standard length (L-S) of certain mesopelagic fishes (Myctophidae, Paralepididae, Phosichthyidae and Stomiidae) living in the central Mediterranean Sea. The length-mass relationship showed isometric growth in six species, whereas linear regressions of L-S and otolith size fit the data well for all species. These equations represent a useful tool for dietary studies on Mediterranean marine predators.