Name one risk associated with high-density fish stocking in raceways.

High-density fish stocking in raceways can indeed lead to an increased risk of disease outbreaks. When fish are kept in close quarters, the stress levels tend to rise significantly due to limited space and competition for resources such as food and oxygen. This stress weakens the immune system of the fish, making them more susceptible to infections and disease transmission among individuals. Moreover, a higher density of fish can facilitate the rapid spread of pathogens, as the proximity allows for easy contact and sharing of water, which may be contaminated with diseases.

In contrast, while increased feeding efficiency and higher growth rates may seem advantageous in a high-density environment, these benefits can be overshadowed by the critical health risks associated with overcrowded conditions. Additionally, improved water quality is generally difficult to maintain in a high-density setup, as waste accumulation and reduced water circulation can lead to deteriorating conditions, further raising the potential for health issues. Hence, the focus on disease risk effectively highlights a key concern in aquaculture practices related to stocking densities.