Statistical Records and Computations on Red Salmon (Oncorhynchus Nerka) Runs in the Nushagak District, Bristol Bay, Alaska, 1946-59 (Classic Reprint) - Softcover

Mathisen, Ole A.

Softcover

ISBN 10: 0282105328 ISBN 13: 9780282105327

Publisher: Forgotten Books, 2018

Synopsis

Excerpt from Statistical Records and Computations on Red Salmon (Oncorhynchus Nerka) Runs in the Nushagak District, Bristol Bay, Alaska, 1946-59

Accurate determination of sex ratio of fish on the spawning grounds is difficult because of observed differences between sexes in behavior during and after Spawning, in time of dying after spawning, in drifting after death, and in selective feeding by predators. The sex ratios from live and dead counts that were considered to be most representative have been used to arrive at escapement sex ratios in the Wood River lakes for the period 1946 58. In 1959, sex ratios for the Wood River lakes escapement were obtained from daily samples collected throughout the season by beach seine as the salmon entered Lake Aleknagik from Wood River. Daily sex ratios in 1959 were weighted by daily escapements past the Wood River tower enumeration site.

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Edition details

• Publisher: Forgotten Books
• Publication date: 2018
• Language: English
• ISBN 10: 0282105328
• ISBN 13: 9780282105327
• Binding: Paperback
• Number of pages: 46