We have previously shown that some insects, including cockroaches have the ability to self-select a consistent protein:carbohydrate ratio. Most notably, we have shown that Rhyparobia madera nymphs when offered casein (protein source) and sucrose (carbohydrate source), consume these nutrients at a ratio of approximately 20% protein and 80% sucrose. Here, we examined the ability of R. madera nymphs to self-select a nutritious meal when offered a protein source (casein), a carbohydrate source (sucrose) and source of lipid (canola oil). Various combinations of these diets were offered to nymphs and feeding rates and efficiencies were determined. Results showed that when given all three nutrients the nymphs consumed these cubes at a 17:76:7 casein:sucrose:canola oil ratio. When given different combinations of these nutrients it became apparent that the consumption of protein by R. madera nymphs was unchanged whether there was a choice of canola oil and/or sucrose as an energy source. These results indicate that even though R. madera is given the opportunity to chose different combinations of nutrients, the nymphs still retain the ability to be efficient by choosing an optimal protein intake for development and growth.
Species 1: Blattodea Blaberidae Rhyparobia madera (Madeira cockroach)
Keywords: feeding, behavior
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