Abundance and composition of the northern pike population in Harding Lake, 1997
By: by Stafford M. Roach.
Contributors: Alaska. Division of Sport Fish.
Series: Fishery data series -- no. 98-14.
Publisher: Alaska Dept. of Fish and Game, Division of Sport Fish
Published: 1998
Place of publication: Anchorage, Alaska
Language: eng
Number of pages: 29
Subjects: Pike -- Alaska -- Harding Lake.; Fish populations -- Alaska -- Harding Lake.
Other titles: Federal aid in sport fish restoration (Alaska)
Description: In 1997, estimated abundance of northern pike esox lucius within Harding Lake was 1,780 fish (SE = 323) for northern pike 300 mm FL, 1,415 fish (SE = 257) for northern pike 450 mm FL, and 246 fish (SE = 45) for northern pike 625 mm FL. Estimated density of northern pike 300 mm FL was 1.78 (SE = 0.32) fish per hectare. The estimated proportion was 0.21 (SE = 0.05) for northern pike from 300 to 449 mm FL; 0.66 (SE = 0.09) for northern pike from 450 to 624 mm FL; and, 0.14 (SE = 0.05) for northern pike 625 mm FL. In 1997, estimated recruitment (abundance of age-5 fish) was 377 northern pike (SE = 68). Estimated abundance was 421 fish (SE = 76) for northern pike < age-5 and 982 fish (SE = 180) for northern pike > age-5. The mean error in assigning the proper incremental age from the scales of 89 northern pike recaptured in 1997 from 1996 was -0.72 years (Z = 5.11; P 0.01); -0.13 years (Z = 0.39; P=0.69) for 16 northern pike that were age-4 in 1996; and -0.85 years (Z = 5.52; P0.01) for 73 northern pike age-5 in 1996. The estimated average percent error of the scale reader in reproducing the same age twice from a Harding Lake northern pike scale in 1997 was 3.2%. For Harding Lake northern pike, indirect value for maximum sustainable yield was estimated as 484 fish, number of northern pike needed to produce maximum sustainable yield was estimated as 1,626 spawning size fish, and the carrying capacity of Harding Lake was estimated as 3,251 northern pike age-5.
Notes: "July 1998"

Includes bibliographical references (p. 20-22).

Also issued online.

Partially financed by the Federal Aid in Sport Fish Restoration Act ... Project F-10-13, Job No. 3-4(c)."