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Growth of sockeye salmon in relation to abundance in the Kvichak district, Bristol Bay, Alaska

Mathisen, Ole A.
Research report
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URI
http://hdl.handle.net/11250/114692
Date
1969
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  • Fiskeridirektoratets skrifter, Serie Havundersøkelser (1900-1990) [314]
Abstract
1. Catch and escapement of Kvichak River sockeye salmon (Oncorhynchus

nerka) and smolt production from Iliamna Lake, the nursery area, have

been determined annually since 1955. Since 1962, information has

been collected on growth and abundance of fry and yearlings and

zooplankton production in Iliamna Lake.

2. Growth in length of smolts can be expressed as a negative exponential

function of population density. A similar relationship exists for maturing

salmon on their return from the ocean to the Kvichak River.

3. There is no strong correlation between the growth of juvenile salmon

in Iliamna Lake nursery area and the standing crop of zooplankters.

Other effects of crowding on growth need to be investigated.

4. An asymptotic limit for the number of smolts produced in the nursery

area has been computed, but it may be valid only for a single-peak

cycle, the current pattern of run variability in the Kvichak River.
Publisher
[Fiskeridirektoratets havforskningsinstitutt]
Series
Fiskeridirektoratets skrifter, Serie Havundersøkelser
vol 15 no 3

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