Spring and Summer Spatial Distribution of Endangered Juvenile Lost River and Shortnose Suckers in Relation to Environmental Variables in Upper Klamath (Paperback) (ISBN-13: 9781496184146)

Lost River sucker Deltistes luxatus and shortnose sucker Chasmistes brevirostris were listed as endangered in 1988 for a variety of reasons including apparent recruitment failure. Upper Klamath Lake, Oregon, and its tributaries are considered the most critical remaining habitat for these two species. Age-0 suckers are often abundant in Upper Klamath Lake throughout the summer months, but catches decline dramatically between late August and early September each year, and age-1 and older subadult suckers are rare. These rapid declines in catch rates and a lack of substantial recruitment into adult sucker populations in recent years suggests sucker populations experience high mortality between their first summer and first spawn. A lack of optimal rearing habitat may exacerbate juvenile sucker mortality or restrict juvenile growth or development.

Author: U. S. Department of the Interior
ISBN-10: 1496184149
ISBN-13: 9781496184146
Publisher: Createspace Independent Publishing Platform
Language: English
Published: 03/30/2014
Pages: 62
Format: Paperback
Weight: 0.37lbs
Size: 11.02h x 8.50w x 0.13d