Quantifying Stomach Contents Using Immunoassays: A Critique
Immunological techniques have a long history of use in the qualitative examination of invertebrate diets, especially for insects (Calver, 1984). Typical dietary questions asked in the ecological application of serological methods include: does predator A ingest prey X, Y, and Z ?; what proportion of the predator population eats a particular prey organism ?; how long is a meal detectable ?; does selective predation occur (that is, does the predator eat prey X but not Y or Z) ? After using antisera to answer similar questions in marine food webs (Feller et al., 1979), it has become apparent that ecologists will never be satisfied with answers to such qualitative questions alone.
KeywordsTotal Soluble Protein Prey Type Meal Size Soluble Protein Concentration Prey Protein
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