Understanding Bee Behavior

Understanding Bee Behavior
Key concepts, typical patterns, and the ecological significance of bees

1. Overview

Bees are social insects (most species) that exhibit complex behaviors essential for colony survival, pollination, and ecosystem health. Their actions are driven by genetics, environmental cues, and communication systems.

2. Social Structure

Note: In solitary bee species (e.g., mason bees), only the female performs all tasks—nest building, provisioning, and egg laying.

3. Life Cycle

1. Egg – Laid by the queen in a wax cell (≈3 days).
2. Larva – Fed a diet of royal jelly (first 3 days) → worker/queen diet (subsequent days).
3. Pupa – Encased in a capped cell; metamorphosis lasts 12–14 days.
4. Adult – Emerges with specific duties determined by age (age‑polyethism).

4. Age‑Polyethism (Task Allocation by Age)

Transition is flexible; colony needs can accelerate or delay task shifts.

5. Communication Systems

5.1. Pheromonal Signals

• Queen mandibular pheromone (QMP): Inhibits worker ovary development, maintains social order.
• Alarm pheromone (isopentyl acetate): Released when a bee is threatened; triggers defensive stinging.
• Nasonov pheromone: Used by foragers to guide nestmates to food sources or new nest sites.

5.2. Waggle Dance (Apis mellifera)

• Purpose: Convey distance and direction to a food source.
• Components:
  • Waggle run: Straight segment; duration encodes distance (≈1 s ≈ 1 km).
  • Return loops: Indicate direction relative to the sun (angle of the waggle run).
• Interpretation: Receiver bees decode the vector and fly to the advertised location.

5.3. Tactile & Vibrational Cues

• Antennal contacts: Exchange information about colony status.
• Vibrations: Signal queen presence, brood health, or alarm.

6. Foraging Behavior