EFFECT OF SALINITY ON SURVIVAL AND DEVELOPMENT OF LARVAE AND POSTLARVAE OF MACROBRACHIUM AMERICANUM BATE (DECAPODA, PALAEMONIDAE) BY KARL-HEINZ HOLTSCHMIT and EDWARD PFEILER Instituto Tecnológico y de Estudios Superiores de Monterrey, Escuela de Ciencias Marítimas y Alimentarias, Apartado Postal 484, Guaymas, Sonora, Mexico INTRODUCTION The freshwater prawn Macrobrachium americanum Bate, 1868, is indigenous to western Mexico and is found in semitropical and tropical regions of western America as far south as northern Peru (Holthuis, 1952). De la Cruz (1968) reported on the distribution of this species in western Mexico and included some notes on its life history. The adults live in fresh water but larval develop- ment takes place in brackish water. After metamorphosis the juveniles migrate back to fresh water. M. americanum is a large species that shows potential for commercial culture. In the laboratory, larvae have been reared at salinities ranging from 10 to 16°/00 (Arana, 1974; Monaco, 1975; Lu et al., 1976). However, no one has yet reported optimum salinity conditions for this species. The purpose of the present paper is to describe the optimum salinities for survival and development of larvae of M. americanum. The results from preliminary experiments on postlarvae are also included.
Crustaceana – Brill
Published: Jan 1, 1984
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