Descripción de la larva y juvenil del mojarrón calamus brachysomus (Lockington) (pisces: sparidae)

Abstract

This paper describes the larval and juvenile stages of the Pacific porgy Calamus brachysomus from 2.6 mm SL reared in the laboratory from eggs collected with a plankton net in Bahia Magdalena and Bahia de La Paz, Baja California Sur, Mexico during the summer of 1986 and spring of 1987. Flexion of the notochord occurred between 3.1 to 4.5 mm SL. Scales and cephalic spines appeared from 4.4 mm, the first ones completing their formation at 9.0 mm SL and the spines disappearing at 15.0 mm(SL). The incisor-like teeth appear at 4.2 mm and the molar-like teeth at 11.4 mm SL. The typical pigmentation pattern (vertical bars) of this species appears from 12.0 mm on. Included are tables of meristic characters and cephalic spination based on cleared and stained specimens, and a table of morphometric characters based on formalin fixed organisms. Drawings are given of each developmental stages and of cephalic spination.