|Document Type:||Chapter or Section|
|Type of Book:||Technical|
|Section or Chapter Title:||New methods for study of fishery problems|
|Book Title:||Proceedings of the 5th Alaska Science Conference|
|Author:||Gerald B. Collins|
One of the tasks of fishery biologists is the development of new techniques for obtaining information. Factual information on size of fish populations, on the rates and the patterns of fish migrations is necessary in order to properly regulate a fishery. Information is needed on factors affecting growth and survival of fish as a basis for decisions on hatchery or stream improvement programs. Detailed information on fish behavior and swimming abilities is required if effective fish passage facilities are to be designed that will pass anadromous fish upstream and downstream over dams. By its very nature, however, much of the information we need is difficult to acquire so we constantly seek new and improved methods to obtain it. The following examples of fishery research methods now being developed by the Pacific Salmon Investigations of the U.S. Fish and Wildlife Service are offered as illustrations of the search being made for new approaches to the study of fishery problems.