Poeciliidae
The family Poeciliidae, belonging to the order Cyprinodontiformes, includes small, live-bearing fish. While widely known in the aquarium trade, they are recognized as potential pests in specialized aquaponic and hydroponic systems where plants are grown in close proximity to fish populations.
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Poeciliidae
These fish primarily damage crops grown in deep-water culture or raft systems. By feeding on the tender root hairs and young root tips of the plants, Poeciliidae hinder the nutrient uptake process, which stunts plant growth and reduces the overall yield of the crop.
The biology of Poeciliidae is marked by a very fast reproductive cycle and live birth, which allows them to colonize man-made agricultural water systems rapidly. Their ability to survive in a variety of water conditions makes them difficult to eradicate once they have established a population.
The economic harm caused by these fish involves both direct physical destruction of root systems and the alteration of the water chemistry. High fish density leads to nutrient imbalances, such as ammonia spikes, which can stress and ultimately kill delicate leafy green crops.
Effective management strategies include the installation of fine-mesh barriers to separate fish from plant zones and the implementation of regular population monitoring. In controlled environments, biological or mechanical removal is necessary to keep the fish population within levels that do not impact crop health.