What Are The Design Requirements For Acrylic Plates For Stingless Bee Queen Rearing? Precision Dimensional Standards

The primary design requirement for acrylic plates used in in vitro stingless bee queen rearing centers on precise well dimensions. Specifically, the wells must be machined to a diameter of 5.8 mm and a depth of 7.5 mm. These specific measurements are critical to successfully replicating the environment necessary for artificial rearing.

The effectiveness of an acrylic carrier plate relies on strict biomimicry. The design must physically replicate the internal volume of a natural queen cell to accommodate both the necessary larval food provision and the uninhibited physical growth of the developing bee.

Replicating Natural Architecture

Precise Dimensional Specifications

To create a functional carrier, the acrylic plate must feature wells that match the geometry of a natural queen cell.

Research establishes the optimal parameters at a diameter of 5.8 mm and a depth of 7.5 mm. Adhering to these specific metrics is the foundation of successful in vitro rearing.

Ensuring Sufficient Volume

The primary function of these dimensions is to establish a specific internal volume.

This volume serves a dual purpose: it acts as a reservoir for the liquid larval diet and a chamber for the organism. The design must ensure the well is large enough to hold the required quantity of food without overflowing or compromising the space available for the larva.

Biological Implications of Design

Facilitating Physical Growth

The growth trajectory of a stingless bee queen larva is significant relative to its initial size.

The acrylic well must provide adequate physical space to accommodate this expansion. If the dimensions are correct, the larva can reach its full physiological size without contacting the well walls prematurely.

Preventing Developmental Issues

The correlation between available space and biological health is direct.

Proper design prevents developmental issues caused by spatial restrictions. By ensuring the carrier plate mimics the natural cell's volume, you mitigate the risk of physical deformities or stunted growth associated with confined environments.

Understanding the Trade-offs

The Consequence of Deviation

While acrylic offers durability and visibility, it is a rigid material that does not expand like natural wax might.

Therefore, there is no margin for error in the machining process. Deviating from the 5.8 mm by 7.5 mm standard—even slightly—can result in a well that either starves the larva (insufficient food volume) or physically crushes it during pupation (insufficient growth space).

Balancing Depth and Diameter

Altering the ratio between depth and diameter to achieve the same volume is generally not recommended.

The larva requires a specific shape to orient itself correctly for feeding and spinning its cocoon. Design changes that alter the well's geometry, even if total volume is preserved, may disrupt these natural behaviors.

Ensuring Rearing Success

When manufacturing or selecting acrylic plates for stingless bee queen rearing, strict adherence to the reference specifications is required.

If your primary focus is Standardization: Adhere strictly to the 5.8 mm diameter and 7.5 mm depth to ensure consistency across all rearing trials.
If your primary focus is Biological Health: Verify that the total volume allows for the complete larval food provision without imposing physical constraints on the larva.

Precise replication of natural geometry is the single most critical factor in designing effective rearing plates.

Summary Table:

Feature	Specification	Importance for Rearing
Well Diameter	5.8 mm	Ensures proper larval orientation and feeding space
Well Depth	7.5 mm	Provides volume for larval food and vertical growth
Material	Acrylic	Offers durability and visibility for monitoring
Design Principle	Biomimicry	Replicates natural queen cell volume and geometry
Critical Factor	Precision Machining	Prevents developmental deformities from spatial limits

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References

Charles Fernando dos Santos, Betina Blochtein. In vitro rearing of stingless bee queens and their acceptance rate into colonies. DOI: 10.1007/s13592-015-0398-2

This article is also based on technical information from HonestBee Knowledge Base .