Too Fast To Feed

#Aggregations of #blacksoldierfly larvae #behave like #fluids.

When the larval container tilts into a sloping position, the larvae actively rearrange themselves and create a horizontal surface. This fluid-like behavior improves how food mixes within the larval aggregates. However, larval movement alone cannot mix effectively in deeper layers. Strong gravitational forces and high contact pressure from surrounding larvae limit movement at the bottom.

Farmers can improve mixing by adjusting airflow. Proper airflow helps distribute food more evenly, increases feeding rates, and boosts overall production efficiency.

Ho et al. (2021) Frontiers in Physics study on BSF larval fluidization showed that airflow allows more larval layers to move. It also helps push food deeper into the aggregation. At high air velocity (around 2 m/s), the entire larval mass becomes fully fluidized. Both larvae and food move rapidly throughout the chamber. However, feeding efficiency does not improve under these conditions. In some cases, it becomes slower than in systems without airflow.

Fast airflow can suspend larvae in mid-air. As a result, many larvae lose contact with the food. This reduces feeding efficiency.

A moderate airflow rate (around 0–1.4 m/s) works best. It keeps larvae in contact with the food while still improving mixing. It also allows food to reach deeper layers without excessive disturbance.

#blacksoldierfly #animalbehavior #fluidization #activematter #airflow #wastemangement