This report describes an investigation of the effects of stream channelization on fish and macro-invertebrates in low gradient reaches of Blacksmith Fork River and the Logan River in the floodplain of Cache Valley in northern Utah. Channelization adversely affected both fish and macro-invertebrate populations and biomass, with the severity of impact directly related to the amount and duration of disturbance of the physical habitat.

From abstract: This report contains information about part of Southeastern Alaska salmon streams is cataloged from the voluminous records of the Fisheries Research Institute of the University of Washington, U.S. Fish and Wildlife Service, Alaska Salmon Industry, and Alaska Department of Fish and Game, and other agencies.

From introduction: As a handbook of salmon streams, this catalog is expected to serve as an aid to conservation agencies as well as others who have an interest in the valuable salmon resources of Southeastern Alaska.

From introduction: Feeding trials were conducted in 1952 with blueback salmon and chinook salmon used as test animals.

Report regarding an investigation on fishing pressure, yield, and expenditures by fishermen on the Madison river in Montana.

Summary of the geographic distribution, habits and economic relations, and descriptions of the subspecies of the North American Sciuridæ.

Summary of the trumpeter swan, including geographic distribution, habitats for breeding and wintering, life cycle, nesting, food, limiting factors, longevity, population dynamics, and human management.

From introduction: "Systematic account of the genus Fiber through study of over 1,000 specimens, chiefly well-prepared skins, accompanied by skulls, together with many odd skulls and skeletons."

Overview of the mammals of Maryland, including descriptions of the orders and maps depicting distribution of the mammals.

From letter of transmittal: "The work consists of a systematic study of all the members of the genus, and includes keys for the identification of the various forms, together with the necessary illustrations, and maps showing the geographic distribution of the species."

Discusses history, nomenclature, common names, habits, external characters, and specimens of American marmots. Describes, lists locations, and provides a key to species and subspecies.

Brief description of the Tres Marías Islands, Mexico, including mammals, birds, reptiles, crustacea, and plants found there.

A report regarding the Southwest Florida Ecological Characterization study, with the purpose of which is to compile existing information about the biological, social and physical sciences for the Gulf coastal counties of Florida from Pasco County to Monroe County, including the Florida Keys and Dry Tortugas.