শনিবার, ৩০ আগস্ট, ২০১৪

Semio-Chemicals:
Semio-chemicals are chemicals that mediate interactions between organisms. They are divided into two major groups:
1. Pheromones, which mediate in intraspecific interactions and
2. Allelo-chemicals for interspecific interactions,

Pheromones:
Chemical substances secreted by an animal to external environment which causes specific reaction on reception by other animal of the same species are called pheromones. Pheromone is an exocrine gland secretion.
Pheromones are of four kinds. They are:
a. Sex Pheromone.
b. Aggregation Pheromone.
c. Alarm Pheromone.
d. Trail-making Pheromone.

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