Freshwater Crayfish 5(1): 549-551 (1983)
PEER REVIEWED RESEARCH ARTICLE
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Some observations on crawfish farming in Spain
Water for flooding of rice fields is pumped up to approximately eight meters, with the topsoil several meters above the water table. From observations, it was noted that crawfish burrowing and the presence of chimneys depend on the consistency of the soil and depth of the water table. (See Figure 1). Where the water table is constant and not too deep, crawfish burrows with chimneys are found. In rice fields, crawfish may dig down to the hardpan soil. Here water is trapped, making conditions suitable for crawfish survival. If the water table is close to the surface, the chimney will be taller. When the water is drained quickly out of the rice field and the water table is deep, the crawfish will dig to reach the ground water and will not construct a chimney.
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Lorena ASH. (1983). Some observations on crawfish farming in Spain. Freshwater Crayfish 5(1):549-551. doi: 10.5869/fc.1983.v5.549
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