State of Florida Game and Fresh Water Fish Commission, Tallahassee. Some structures included in this category have perforations for the sole purpose of providing cover for small fish by excluding others on the basis of size. Snow fencing may also be stretched around and between trees. Click here for map of states that used this method. Structures are good for use in water supply reservoirs where organic materials are not allowed.
Structures are durable and long-lived.
Structures may experience silting problems and so limit fish access in some reservoirs. Growth of periphyton, an important food source for macroinvertebrates, on structures is limited in low fertility waters. Structures are not recommended for low fertility or silt-laden systems. Lemons, B. 1992. Lake Powell artificial habitat project.