American white pelican

The American white pelican (Pelecanus erythrorhynchos) is a member of the order Pelecaniformes and the family Pelecanidae. In the context of industrial aquaculture, this species is considered a major agricultural pest due to its significant impact on fish production systems and economic stability of fish farms.

These birds pose a serious threat to inland fisheries and commercial ponds. As highly efficient piscivores, they consume large quantities of marketable fish daily, leading to substantial financial losses. Their presence in aquaculture facilities is a critical issue that requires strategic management to maintain profitability.

The biology of this species is characterized by migratory behavior and colonial nesting. During seasonal movements, large flocks search for optimal feeding grounds, often targeting artificial fish ponds where prey density is high and access is relatively easy. This concentrated feeding behavior makes them particularly damaging to intensive fish farming operations.

The damage caused by these birds is direct, as they consume both fingerlings and mature fish. They utilize cooperative feeding strategies to corral fish, drastically reducing population counts in a short period. Furthermore, their presence can exacerbate the spread of fish-borne parasites and pathogens, compromising the overall health of the aquaculture stock.

Control measures are essential for protecting assets, including the use of overhead exclusion netting, acoustic deterrents, and visual repellents such as pyrotechnics or predatory decoys. Integrated pest management, which combines physical barriers with behavioral modification of the birds, is the most successful approach to mitigating their impact on production.