Culture of the mysid, Mysidopsis almyra (Bowman), (Crustacea: Mysidacea) in a static water system: effects of density and temperature on production, survival and growth

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–1 were placed in trays with 20 L of sea water. Temperatures 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 ± 2 °C) using a mysid density of 50 mysids L–1 (1000 mysids tray–1). All experiments had a duration of 30 days. The mysids in all trials were cultured at 20 ± 2‰ 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–1; maximum production was 273 ± 99 hatchlings day–1. At a population density of 200 mysids L–1, 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.

Physiological responses of Chinese longsnout catfish to water temperature

“…The growth of Chinese longsnout catfish was significantly affected by water temperature, which is consistent with the effect in Mysidopsis almyra (Domingues et al, 1999) and Lota lota (Hofmann and Fischer, 2003). The effect may be a function of changes in several processes including food intake and protein synthesis rates (Cossins and Bowler, 1987).…”

Ciclo de vida pós-marsupial e crescimento de Metamysidopsis elongata atlantica (Crustacea, Mysidacea, Mysidae) em cultivo de laboratório

“…Metamysidopsis elongata (Holmes, 1900) Bowman, 1964(WITTMANN, 1981BREMER & VIJVERBERG, 1982;ASTTHORSSON & RALPH 1984;BRANDT et al, 1993;DOMINGUES et al, 1999).…”

Ciclo de mudas e taxas de crescimento de Metamysidopsis elongata atlantica (Crustacea, Mysidacea) cultivado em diferentes temperaturas e salinidades

“…REITSEMA & NEFF (1980) reportam que Mysidopsis almyra (Bowman, 1964) maturou sexualmente entre 17 e 21 dias a 28ºC, e MCKENNEY (1996) registrou que, para a mesma espécie, maturar em temperatura de 19ºC foram necessários 20 a 25 dias. DOMINGUES et al (1999) relataram, para Mysidopsis almyra cultivado em laboratório a 26, 22 e 18ºC, que o tempo da primeira desova -13, 21 e 28 dias respectivamente -foi modificado em função da temperatura, aumentando com o decréscimo da mesma. No presente trabalho foram registradas cinco mudas até a maturação sexual (14 dias) em todas as salinidades e com temperatura de 20°C, concordando com estudos realizados por GAMA et al (2001) para M. elongata atlantica.…”