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Freshwater Crayfish 9(1): 13-17 (1993)


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Relaying: a means to increase market size of Procambarus clarkii and increase net returns from rice/crayfish production

McClain WR, Bollich PK and Huffman DC  e-mail link

Published Online: 6/1/2020


Production of small crayfish often occurs in Louisiana. This places those producers at an economic disadvantage since premium prices are paid only for the larger size grades. A study was conducted to examine the effectiveness of transferring small Procambarus clarkii from poor production ponds to newly established rice fields to achieve further growth and larger crayfish. Small, low-market-value crayfish harvested from commercial ponds in late May were relayed into newly established rice plots at two test densities (560 and 1120 kg ha-1). After 30 days, crayfish were reharvested, graded, and sorted into three market size categories. Mean yields of 549 and 893 kg of crayfish ha-1 were achieved from the low and high stocked fields, respectively. Rice was subsequently harvested, and grain yields averaged 5548, 4159, and 4028 kg ha-1 for the rice-only, low stocked, and high stocked fields. respectively. The significant loss of grain yields in the crayfish/rice fields was attributed to the destruction of rice in the trapping lanes. An economic analysis for this inter-cropping scenario was conducted; based on differential 1991 prices for the three size categories of crayfish, average net returns were increased from $133.38 ha-1 for rice alone to $308.75 and $429.78 ha-1 for fields hosting the low and high populations of relayed crayfish, respectively.

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McClain WR, Bollich PK and Huffman DC. (1993). Relaying: a means to increase market size of Procambarus clarkii and increase net returns from rice/crayfish production. Freshwater Crayfish 9(1):13-17. doi: 10.5869/fc.1993.v9.013



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   Published Online: 6/1/2020

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