COMPARATIVE ECOPHYSIOLOGY OF MYSIDACEAE HEMIMYSIS-SPELUNCOLA LEDOYER (CAVERNICOLOUS) AND LEPTOMYSIS-LINGVURA G.O. SARS (NON-CAVERNICOLOUS) - EFFECT OF TEMPERATURE ON GROWTH IN TANK

Two marine mysids, Leptomysis lingvura G.O. Sars, a species from surface waters and Hemimysis speluncola Ledoyer, a sciaphil species from submarine caves, were bred under laboratory conditions at four different temperatures (10, 14, 18, and 22 °C). During the first stages of the development (stages 1 to 7), the increase of length is linear, with a rate directly related to temperature conditions. The growth of Leptomysis appears to be more sensitive to temperature variations, especially in the low temperature range. Observations are made on the time of appearance and the size of successive stages during the immature and the adult period and, for Hemimysis, on the chronology of the larvae development in the marsupium. The size of adults obtained under laboratory conditions and of wild animals collected during an annual cycle are compared. © 1979.