![]() Nevertheless, new techniques have improved our ability to collect the secretions and analyze the chemical components. ![]() To compound matters, the amount of chemical released is often small, which makes it difficult to collect a sufficiently large sample for chemical analysis. ![]() In addition, chemical signals are complex blends in many species, especially in insects and mammals. We generally cannot smell most animal pheromones, so we are not aware of most chemical senders. Identification and analysis of chemical signals has lagged behind the analysis of visual and auditory signals because our own sense of smell is rather poor. 6.1 How Are Pheromones Identified? Introduction
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