Dd. Benetti, SPAWNING AND LARVAL HUSBANDRY OF FLOUNDER (PARALICHTHYS-WOOLMANI) ANDPACIFIC YELLOWTAIL (SERIOLA-MAZATLANA), NEW CANDIDATE SPECIES FOR AQUACULTURE, Aquaculture, 155(1-4), 1997, pp. 307-318
This paper describes the spawning and larval rearing of a new species
of flounder (Paralichthys woolmani) and Pacific yellowtail (Seriola ma
zatlana) for aquaculture in Ecuador, Experimental production of these
species has been conducted for the first time from eggs in captivity.
Broodstock flounder were conditioned to spawn through temperature mani
pulation. Pacific yellowtail spawned under natural environmental condi
tions. Production of flounder fingerlings has been steady but survival
rates remain low (3-8%). Survivals ranging from 0-70% were achieved t
hroughout larval rearing of Seriola, however, high mortalities caused
by diseases, cannibalism and weaning onto artificial diets during and
after metamorphosis reduced the average survival rates through the juv
enile stage to less than 1%. Epizootics of epitheliocystis and Vibrio
alginolyticus have repeatedly occurred during the early developmental
stages and remain the bottleneck to sustainable mass production of S.
mazatlana and P. woolmani fingerlings. (C) 1997 Elsevier Science B.V.