Metamysidopsis elongata atlantica (Bacescu, 1968) was reared in the laboratory for 45 days at 20±1°C and salinity of 30ppt. Growth curves (von Bertalanffy model) were calculated for both sexes and for each sex. The daily rate of carapace growth was significantly different between females and males (F test, p <0.05).>-1; males, 0.0448 mm day-1). After the maturity (15 to 45 days), these rates decreased similarly for both sexes (females, 0.0203 mm day-1; males, 0.0174mm day-1). The average growth rate was 0.0207mm day-1 over the 45 days. Twelve moults were observed in a period of 60 days. The first five moults occurred up to 14 days old (age of the sexual differentiation), with a mean intermoult period of 2.9 days. From the 6th molt it increased to 5.6 days. The results suggest that the use of the carapace length is a good measure to calculate the growth and longevity of these organisms.
Citation
Gama, A.M.S., Montú, M.A. & Gusmão, L.F.M. 2002. Post-marsupial life cicle and growth of Metamysidopsis elongata atlantica (Crustacea, Mysidacea, Mysidae) under laboratory condition. Iheringia, Sér. Zool. [online]. 2002, vol.92, n.1, pp. 77-83. Available from: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212002000100006&lng=en&nrm=iso>. ISSN 0073-4721. doi:10.1590/S0073-47212002000100006
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