2.2. Determination of individual bee weight
The fresh weight of an Apis mellifera
worker drastically increases during its 21 days of development from an egg
weighing about 0.03-0.1 mg to about 120 mg at adult emergence. In contrast,
drones reach 277-290 mg after emergence (Hrassnigg and Crailsheim, 2005).
Hence, the weight of larvae is, among others factors, important in determining
their age (see section 2.5). Obtaining adult and brood of known age; Wang, 1965).
Determining the weight of individual honey bees can also be important when
assessing the effect of pathogens, parasites or toxins on their development and
health or when assessing their nutritional intake. In this section, we describe
procedures to obtain fresh weight of immature (see section 2.2.2.), adult honey
bees (2.2.3.) or their parts (2.2.4.) as well as dry weight of adults (2.2.5).
Larvae or adults collected for later analysis are best stored frozen to prevent