Production experiment of halibut fry in large enclosed water columns

Abstract

Halibut eggs were hatched in 21 floating enclosures and the larvae stored through the yolk sac period under 5 different environmental conditions, each with 4 parallels. The effect of the different environments was examined as survival rates of larvae and on morphometric measurements at day 31 and day 49, when one of each type was emptied. Half of the initial number of enclosures, with their content of remaining larvae, were continued in a first feeding trial to bottom settling of the metamorphosed fry. An estimated number of 300 larvae reached metamorposis, and at the end of the experiment a total of 68 were captured and transferred to tanks at the station.