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A detailed assessment of the Arctic grayling Thymallus arcticus population was conducted at Piledriver Slough, near Fairbanks, Alaska during 1992. A mark-recapture experiment was conducted, from which abundance, age and size composition of the Arctic grayling population were estimated. The timing of the investigation corresponded with spring break-up and the onset of a popular spring fishery, similar to past investigations. Fish were captured using pulsed direct current backpack electrofishing gear. An estimated 14,030 (SE = 1,860) Arctic grayling greater than 149 millimeter fork length were present during the May spawning period. The stock was characterized by a high proportion of sub-legal sized Arctic grayling (less than 260 millimeter fork length) and ages 4 and 5 predominated. Preliminary estimates of survival and exploitation indicated the stock of Arctic grayling may have a low survival rate and higher than expected exploitation rates. The results of a concurrent mark-recapture experiment on stocked rainbow trout Oncorhynchus mykiss indicated an overwinter survival of 0.25 percent for the 1991 stocking cohort.
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Subjects
Statistics, Fish populations, Rainbow trout, Arctic grayling, Fish-culturePlaces
Piledriver Slough, AlaskaEdition | Availability |
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1
Stock assessment of Arctic grayling and rainbow trout in Piledriver Slough during 1992
1993, Alaska Dept. of Fish and Game, Division of Sport Fish
in English
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2
Stock assessment of Arctic grayling and rainbow trout in Piledriver Slough during 1992
1993, Alaska Dept. of Fish and Game, Division of Sport Fish
in English
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Book Details
Edition Notes
"March 1993".
Includes bibliographical references (p. 25-28).
Also issued online.
Classifications
The Physical Object
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Feedback?January 20, 2010 | Edited by WorkBot | add subjects and covers |
December 11, 2009 | Created by WorkBot | add works page |