Effects of Chiloquin Dam on Spawning Distribution and Larval Emigration of Lost River, Shortnose, and Klamath Largescale Suckers in the Williamson and Sprague Rivers, Oregon PDF Download
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Author: U.S. Department of the Interior
Publisher: CreateSpace
ISBN: 9781497400504
Category : Nature
Languages : en
Pages : 32
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Book Description
Chiloquin Dam was constructed in 1914 on the Sprague River near the town of Chiloquin, Oregon. The dam was identified as a barrier that potentially inhibited or prevented the upstream spawning migrations and other movements of endangered Lost River (Deltistes luxatus) and shortnose (Chasmistes brevirostris) suckers, as well as other fish species. In 2002, the Bureau of Reclamation led a working group that examined several alternatives to improve fish passage at Chiloquin Dam.
Author: U.S. Department of the Interior
Publisher: CreateSpace
ISBN: 9781497400504
Category : Nature
Languages : en
Pages : 32
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Book Description
Chiloquin Dam was constructed in 1914 on the Sprague River near the town of Chiloquin, Oregon. The dam was identified as a barrier that potentially inhibited or prevented the upstream spawning migrations and other movements of endangered Lost River (Deltistes luxatus) and shortnose (Chasmistes brevirostris) suckers, as well as other fish species. In 2002, the Bureau of Reclamation led a working group that examined several alternatives to improve fish passage at Chiloquin Dam.
Author: Barbara A. Martin
Publisher:
ISBN:
Category : Catostomidae
Languages : en
Pages : 30
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Book Description
Author: U.S. Department of the Interior
Publisher: CreateSpace
ISBN: 9781496183996
Category : Nature
Languages : en
Pages : 38
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Book Description
In 2006, we collected larval Lost River sucker Deltistes luxatus (LRS), shortnose sucker Chasmistes brevirostris (SNS), and Klamath largescale sucker Catostomus snyderi (KLS) emigrating from spawning areas in the Williamson and Sprague Rivers. This work is part of a multi-year effort to characterize the relative abundance, drift timing, and length frequencies of larval suckers in this watershed prior to the removal of Chiloquin Dam on the lower Sprague River. Additional larval drift samples were collected from the Fremont Bridge on Lakeshore Drive on the south end of Upper Klamath Lake near its outlet to the Link River. Because of difficulties in distinguishing KLS larvae from SNS larvae, individuals identified as either of these two species were grouped together and reported as KLS-SNS in this report.
Author: U.S. Department of the Interior
Publisher: CreateSpace
ISBN: 9781497359758
Category : Nature
Languages : en
Pages : 38
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Book Description
In 2009 and 2010, drift samples were collected from six sites on the lower Sprague and Williamson Rivers to assess drift patterns of larval Lost River suckers (Deltistes luxatus) (LRS) and shortnose suckers (Chasmistes brevirostris) (SNS). The objective of this study was to characterize the drift timing, relative abundance, and growth stage frequencies of larval suckers emigrating from the Sprague River watershed. These data were used to evaluate changes in spawning distribution of LRS and SNS in the Sprague River after the 2008 removal of Chiloquin Dam. Drift samples were collected at four sites on the Sprague River and one site each on the Williamson and Sycan Rivers.
Author: Craig M. Ellsworth
Publisher:
ISBN:
Category : Catostomidae
Languages : en
Pages : 13
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Book Description
Author:
Publisher:
ISBN:
Category : Bald eagle
Languages : en
Pages : 302
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Book Description
Author: Craig M. Ellsworth
Publisher:
ISBN:
Category : Catostomidae
Languages : en
Pages : 30
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Book Description
Author: Craig M. Ellsworth
Publisher:
ISBN:
Category : Catostomidae
Languages : en
Pages : 0
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Book Description
Author: Michael S. Cooperman
Publisher:
ISBN:
Category : Catostomidae
Languages : en
Pages : 254
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Book Description
We monitored larval Lost River and shortnose suckers from natal beds in the Williamson and Sprague rivers to nursery grounds in Upper Klamath Lake. Downstream movements occurred at night, in the middle of the channel, and on the falling limb of the hydrograph. Ages, sizes, and developmental stages of larvae from spawning beds and the river mouth were similar, while larvae collected contemporaneously from the lake tended to be larger and better fed. Our results indicate in-river rearing was rare, that a rapid outmigration to the lake was favorable for larval survival, and that modification of the lower Williamson River does not appear to have prohibited rapid entry or preclude access to Upper Klamath Lake. Within the Williamson River and Upper Klamath Lake, emergent macrophytes supported significantly higher abundance, larger mean sizes, and better fed larvae than submerged macrophytes, woody vegetation, or open water areas. Analysis of seven years of larval sucker production and survival corroborated the habitat analysis by identifying a positive relationship with emergent macrophyte availability as well as a positive relationship with air temperature and a negative relationship with high wind. These findings illustrate the importance of fast growth, appropriate habitat and calm hydrological conditions for larvae, and are highly consistent with other larval fish studies.
Author: U.S. Department of the Interior
Publisher: CreateSpace
ISBN: 9781497346710
Category : Reference
Languages : en
Pages : 86
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Book Description
Federally endangered Lost River sucker Deltistes luxatus and shortnose sucker Chasmistes brevirostris were once abundant throughout their range but populations have declined; they have been extirpated from several lakes, and may no longer reproduce in others. Poor recruitment into the adult spawning populations is one of several reasons cited for the decline and lack of recovery of these species, and may be the consequence of high mortality during juvenile life stages. High larval and juvenile sucker mortality may be exacerbated by an insufficient quantity of suitable rearing habitat. Within Upper Klamath Lake, a lack of marshes also may allow larval suckers to be swept from suitable rearing areas downstream into the seasonally anoxic waters of the Keno Reservoir.
