Stock monitoring of whitefish in the Chatanika River during 1998
By: by Douglas F. Fleming.
Contributors: Alaska. Division of Sport Fish.
Series: Fishery data series -- no. 99-18.
Publisher: Alaska Dept. of Fish and Game, Division of Sport Fish, Research and Technical Services
Published: 1999
Place of publication: Anchorage
Language: eng
Number of pages: 24
Subjects: Whitefishes -- Alaska -- Chatanika River -- Statistics.; Least cisco -- Alaska -- Chatanika River -- Statistics.; Fish populations -- Alaska -- Chatanika River -- Measurement.
Description: Stock assessment in 1997 indicated Chatanika River whitefish were not sufficient in number or composition to prosecute fisheries in 1997 or 1998. A monitoring project was used in 1998 to collect age and size data from the pre-spawning populations. In late August, 462 humpback whitefish Coregonus pidschian 360mm FL and 216 least cisco C. sardinella 290mm FL were sampled from a 30 km section of the Chatanika River. Sampling was conducted using electrofishing within the geographic bounds and timing of stock assessments from 1992-1994. Humpback whitefish that were ages 6 and 7 were most common, which indicated lower recruitment levels than in prior years. The most common size of humpback whitefish was between 430 and 440 mm FL. Ages 6 and 7 were the most common ages of least cisco, and the most common sizes fell between 350 and 360 mm FL. Again, a tendency toward older aged individuals has indicated lower recruitment levels in 1998. There were, however, a presence of younger and smaller fish which may suggest future improvement in recruitment.
Notes: "August 1999."

Includes bibliographical references (p. 11-13).

Also issued online.

Partially financed by the Federal Aid in Sport Fish Restoration Act (16 U.S.C. 777-777K) Project F-10-14, Job no. R-3-5.