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Trophic ecology of red swamp crayfish Procambarus clarkii (Girard) -preferences and digestibility of plany foods
Ilhéu M and Bernardo JM 
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Abstract
Red swamp crayfish Procambarus clarkii (Girard), abound in a large diversity of freshwater habitats in the south of Portugal. Under conditions of high density, crayfish trophic behaviour could exert a considerable ecological impact, affecting species composition, diversity and biomass of plants. In this study trophic preference for plant material is evaluated through choice feeding experiments. Plants composition (ash, crude protein and fibre) and its digestibility are also evaluated and related to feeding preferences. Consumption of green macrophytes is expected to be low when detritus material is available, indicating that crayfish display a preference for microbially conditioned material. For this type of food a high assimilation efficiency was observed.
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Ilhéu M and Bernardo JM. (1995). Trophic ecology of red swamp crayfish Procambarus clarkii (Girard) -preferences and digestibility of plany foods. Freshwater Crayfish 10(1):132-139. doi: 10.5869/fc.1995.v10.132
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