Abstract
The effects of temperature on growth and on the duration of the molt cycle and inter-molt stages of Palaemon serratus were examined in relation to body size under controlled conditions in the laboratory. Over the size range studied, the best temperature for growth is 22° C, but when the temperature differs from this optimum, young shrimps are less affected than old ones. Growth of the smallest shrimps is depressed especially by extremely low temperatures; on the contrary, high temperatures act negatively on the growth of old animals. The duration of the molt cycle is directly and linearly related to shrimp length; increasing temperature shortens it according to a hyperbolic curve, with a greater effect on the largest animals. Neither body size nor temperature affects significantly the relative durations of the molt stages.
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