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- Autorius: U S Department of the Interior
- Leidėjas: CreateSpace Independent Publishing Platform
- Metai: 2014
- Puslapiai: 62
- ISBN-10: 1496184149
- ISBN-13: 9781496184146
- Formatas: 21.6 x 28 x 0.3 cm, minkšti viršeliai
- Kalba: Anglų
Spring and Summer Spatial Distribution of Endangered Juvenile Lost River and Shortnose Suckers in Relation to Environmental Variables in Upper Klamath Lake, Oregon (el. knyga) (skaityta knyga) | knygos.lt
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Aprašymas
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.
- Autorius: U S Department of the Interior
- Leidėjas: CreateSpace Independent Publishing Platform
- Metai: 2014
- Puslapiai: 62
- ISBN-10: 1496184149
- ISBN-13: 9781496184146
- Formatas: 21.6 x 28 x 0.3 cm, minkšti viršeliai
- Kalba: Anglų
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.
Atsiliepimai