15 MAY 1999
CULTURE OF THE MYSID, MYSIDOPSIS ALMYRA (BOWMAN), (CRUSTACEA: MYSIDACEA) IN A STATIC WATER SYSTEM: EFFECTS OF DENSITY AND TEMPERATURE ON PRODUCTION, SURVIVAL AND GROWTH
P.M. Domingues, P.E. Turk, J.P. Andrade, P.G. Lee-1999
Aquaculture Research, 30: 135-143
Abstract:
The effects of animal density and water temperature on the culture of the mysid, Mysidopsis almyra (Bowman), in a static water system were evaluated. An initial set of experiments tested the effects of mysid density on production. Densities of 25, 37.5, 50, 100 and 200 mysids/L were placed in trays with 20L of sea water. Temperature were maintained at 26 +/- 2 C. A second set of experiments was conducted in the same system at three different temperatures (18 +/- 1, 22 +/- 1 and 26 +/- 2C) using a mysid density of 50 mysids/L (1000 mysids/tray). All experiments had a duration of 30 days. The mysids in all trials were culture at 20 +/- 2 ppt salinity and fed Artemia nauplii enriched with marine fatty acids. There was a positive correlation between production and mysid densities up to populations of 100 mysids/L; maximum production was 273 +/- 99 hatchlings/day. At a population density of 200 mysids/L, high mortality and low production were recorded 4 days after the start of the experiment. The experiments testing different temperatures showed that mysid production was higher at 22 +/- 1 C, although this result was not significant (P>0.05). Growth rates and hatchling survival after 7 days were significantly higher (P<0.05) at 26 +/- 2 C compared to survival and growth at 18 or 22 C.
(National Resource Center for Cephalopods, University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555-1163, USA, e-mail of P.G. Lee: pglee@utmb.edu)