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Sonar estimation of chum salmon passage in the Aniak River, 2003

Autor: Heath D Sandall; Carl T Pfisterer; Alaska. Division of Sport Fish.; Alaska. Division of Commercial Fisheries.
Editorial: Anchorage : Alaska Dept. of Fish and Game, Division of Commercial Fisheries [i.e. Sport Fish], Research and Technical Services, [2006]
Serie: Fishery data series, no. 06-32.
Edición/Formato:   Libro impreso : Documento : Publicación gubernamental estatal o provincial   Archivo de computadora : Inglés (eng)
Resumen:
The Aniak River sonar project has provided daily fish passage estimates for most years since 1980. During this time, the project has undergone important changes including changing from the original Bendix sonar to dual-beam and is in the process of migrating to a high frequency imaging sonar (DIDSON). This season, the project adopted a new sampling protocol in which the sonar operated for three 4-hour blocks each  Leer más
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Detalles

Género/Forma: Statistics
Tipo de material: Documento, Publicación gubernamental, Publicación gubernamental estatal o provincial, Recurso en Internet
Tipo de documento Libro, Archivo de computadora, Recurso internet
Todos autores / colaboradores: Heath D Sandall; Carl T Pfisterer; Alaska. Division of Sport Fish.; Alaska. Division of Commercial Fisheries.
Número OCLC: 70668433
Notas: "Alaska Department of Fish and Game, Divisions of Sport Fish and Commercial Fisheries"--Cover.
"June 2006."
Descripción: ii, 50 pages : illustrations, map ; 28 cm.
Detalles: This item was harvested from the Fish and Game web site: http://www.sf.adfg.state.ak.us/FedAidPDFs/fds06-32.pdf in July 2006 for the Alaska State Publications Program; remote access available via StaticURL.
Título de la serie: Fishery data series, no. 06-32.
Responsabilidad: by Heath D. Sandall and Carl T. Pfisterer.

Resumen:

The Aniak River sonar project has provided daily fish passage estimates for most years since 1980. During this time, the project has undergone important changes including changing from the original Bendix sonar to dual-beam and is in the process of migrating to a high frequency imaging sonar (DIDSON). This season, the project adopted a new sampling protocol in which the sonar operated for three 4-hour blocks each day (0000-0400, 0800-1200, and 1600-2000 hours). The Aniak River sonar project was operational from 28 June through 31 July in 2003. During this period, an estimated 393,396 fish (SE 7,871) passed through the ensonified area. The peak passage of 23,208 fish occurred on 14 July and the 50% passage date occurred on 17-July. The escapement estimate was primarily comprised of age-0.3 fish (80.6%), while age -0.4 (17.9%), -0.5 (1.1%) and -0.2 (0.4%) classes were also present. Side-by-side comparisons of counts obtained with the BioSonics and DIDSON equipment suggest undercounting with the BioSonics at high densities.

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Primary Entity

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