Download or read book Lost River Deltistes Luxatus and Shortnose Chasmistes Brevirostris Sucker Recovery Plan written by Kevin Stubbs and published by . This book was released on 1993 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Revised Recovery Plan for the Lost River Sucker Deltistes Luxatus and Shortnose Sucker Chasmistes Brevirostris written by and published by . This book was released on 1993 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Revised Recovery Plan for the Lost River Sucker Deltistes Luxatus and Shortnose Sucker Chasmistes Brevirostris written by and published by . This book was released on 1993 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lost River Deltistes Luxatus and Shortnose Chasmistes Brevirostris Sucker Recovery Plan written by Kevin Stubbs and published by . This book was released on 1993 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological conference Opinion Regarding the Effects of Operation of the Bureau of Reclamation s Klamath Project on the Endangered Lost River Sucker Deltistes Luxatus Endangered Shortnose Sucker Chasmistes Brevirostris Threatened Bald Eagle Haliaeetus Leucocephalus and Proposed Critical Habitat for the Lost River shortnose Suckers written by and published by . This book was released on 2001 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Five Year Status Report for Lost River Sucker written by California. Inland Fisheries Division. Endangered Species Project and published by . This book was released on 1987 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Temporal and Spatial Distribution of Endangered Juvenile Lost River and Shortnose Suckers in Relation to Environmental Variables in Upper Klamath Lake Oregon written by U.S. Department of the Interior and published by CreateSpace. This book was released on 2014-03-30 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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. Similar declines of age-1 suckers between spring and late summer also occur annually. 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.
Download or read book Distribution and Condition of Young of Year Lost River and Shortnose Suckers in the Williamson River Delta Restoration Project and Upper Klamath Lake Oregon 2008 10 Final Report written by U.S. Department of the Interior and published by CreateSpace. This book was released on 2014-03-30 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Nature Conservancy undertook restoration of the Williamson River Delta Preserve with a primary goal "to restore and maintain the diversity of habitats that are essential to the endangered [Lost River sucker (Deltistes luxatus) and shortnose sucker (Chasmistes brevirostris)] while, at the same time, minimizing disturbance and adverse impacts" (David Evans and Associates, 2005). The Western Fisheries Research Center of the U.S. Geological Survey was asked by the Bureau of Reclamation to assist The Nature Conservancy in assessing the use of the restoration by larval and juvenile suckers.
Download or read book Temporal and Spatial Distribution of Endangered Juvenile Lost River and Shortnose Suckers in Relation to Environmental Variables in Upper Klamath Lake Oregon written by U.S. Department of the Interior and published by CreateSpace. This book was released on 2014-03-30 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 sub-adult 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 access to, or abundance of, optimal rearing habitat may exacerbate juvenile sucker mortality or restrict juvenile growth or development.
Download or read book Demographics and 2008 Run Timing of Adult Lost River Deltistes Luxatus and Shortnose Chasmistes Brevirostris Suckers in Upper Klamath Lake Oregon 2008 written by U.S. Department of the Interior and published by CreateSpace. This book was released on 2014-03 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: We used capture–recapture data to assess population dynamics of endangered Lost River suckers (Deltistes luxatus) and shortnose suckers (Chasmistes brevirostris) in Upper Klamath Lake, Oregon. The Cormack–Jolly–Seber method was used to estimate apparent survival probabilities, and a temporal symmetry model was used to estimate annual seniority probabilities. Information theoretic modeling was used to assess variation in parameter estimates due to time, gender, and species. In addition, length data were used to detect multiple year-class failures and events of high recruitment into adult spawning populations. Survival of adult Lost River and shortnose suckers varied substantially across years. Relatively high annual mortality was observed for the lakeshore-spawning Lost River sucker subpopulation in 2002 and for the river spawning subpopulation in 2001.
Download or read book Spring and Summer Spatial Distribution of Endangered Juvenile Lost River and Shortnose Suckers in Relation to Environmental Variables in Upper Klamath Lake Oregon written by U S Department of the Interior and published by . This book was released on 2014-03-30 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book University of California Peer Review of Biological conference Opinion Regarding the Effects of Operation of the Bureau of Reclamation s Klamath Project on the Endangered Lost River Sucker Deltistes Laxatus sic Endangered Shortnose Sucker Chasmistes Brevirostris Threatened Bald Eagle Haliaeetus Leucocephalus and Proposed Critical Habitat for the Lost River shortnose Suckers written by and published by . This book was released on 2001 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution Health and Development of Larval and Juvenile Lost River and Shortnose Suckers in the Williamson River Delta Restoration Project and Upper Klamath Lake Oregon written by U.S. Department of the Interior and published by CreateSpace. This book was released on 2014-03 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Patterns of Retention and Vagrancy in Larval Lost River and Shortnose Suckers from Upper Klamath Lake Oregon written by Susan A. Reithel and published by . This book was released on 2006 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Larval transport and retention of two endangered suckers were studied in a highly altered lacustrine/riverine complex. The endangered populations of Lost River sucker, Deltistes luxatus, and shortnose sucker, Chasmistes brevirostris, in Upper Klamath Lake (UKL), Oregon are the largest remnant populations of these suckers. Downstream of UKL, the Keno Impoundment is a seasonally lethal, anoxic habitat. We investigated species densities and hatch date differences between larvae retained in Upper Klamath Lake and those transported below the Link River Dam into the Keno Impoundment. In 2004, larval and juvenile Lost River suckers were captured in greater densities below the dam. Larval shortnose suckers were captured in greater densities in UKL while juveniles were captured in equal densities above and below the dam. Lost River suckers had earlier hatch dates than shortnose suckers and individuals below the dam had earlier average hatch dates for both species. These patterns suggest that, in 2004, early spawned fish, especially Lost River suckers, were more likely to be transported from Upper Klamath Lake while shortnose suckers were more likely to be retained.
Download or read book Age and Growth of Young of the year Lost River Suckers Deltistes Luxatus and Shortnose Suckers Chasmistes Brevirostris of Upper Klamath Lake Oregon written by Daniel Joseph Logan and published by . This book was released on 1998 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Upper Klamath Lake in southern Oregon has two species of lacustrine suckers, Lost River sucker Deltistes luxatus and shortnose sucker Chasmistes brevirostris that were historically abundant. Results of surveys performed in the mid-1980's indicated that populations of both species were declining and ageing with apparent recruitment failure in most years since 1970. In 1988 both species were listed as endangered species and high priority has been placed on investigating recruitment of Upper Klamath Lake suckers. Lapilli are the preferred otolith for ageing suckers. Lapilli form predictably on the day of hatch, have the most conservative morphology of the three otoliths, and deposit easily discernable increments that begin on the day of hatch and proceed daily, and grow in a predictable relationship with somatic growth. Ages estimated by otolith analysis and resulting hatch dates of young-of-the-year Lost River sucker and shortnose sucker were consistent annually and consistent with reported spawning period for suckers from Upper Klamath Lake. Otolith increment analysis is necessarily lethal, whereas scale circuli analysis is not lethal. My findings suggest that scale circuli count is an inefficient estimator of daily Daily age estimates for age in young-of-the-year Lost River sucker and shortnose sucker. any given circuli count varied by approximately 51 days in Lost River sucker and 30 days Additionally, my results do not accurately predict the size or age at in shortnose sucker. which scales are formed, thereby invalidating an assumption of age and growth models. Consequently, scale circuli analysis cannot be used to produce accurate estimates of age or growth for young-of-the-year Lost River sucker and shortnose sucker. Lost River sucker and shortnose sucker achieve a relatively large size by the autumn of their first year, consistent with other members of Catostomidae. Interspecific difference in growth rates was evident in each year with Lost River sucker exhibiting faster growth than shortnose sucker in each year. Abundance of young-of-the-year suckers does not appear to be strongly correlated to somatic growth rate, though hatch date and environmental parameters are highly correlated with abundance. In both Lost River sucker and shortnose sucker, in years with the highest abundance (1991 and 1993), the mean hatch dates of surviving fish were later than in years with the lowest abundance. Also, young-of-the-year Lost River sucker and shortnose sucker experienced wide environmental fluctuations in Upper Klamath Lake as seasonal limnological and climatic variation create a dynamic habitat for young suckers. Water temperature, precipitation, air temperature, and minimum lake elevation are all strongly correlated to abundance of young-of-the-year suckers.
Download or read book Effects of Ambient Water Quality on the Endangered Lost River Sucker Deltistes Luxatus in Upper Klamath Lake Oregon written by Barbara Ann Martin and published by . This book was released on 1997 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Endangered and Threatened Wildlife and Plants Designation of Critical Habitat for Lost River Sucker and Shortnose Sucker Us Fish and Wildlife Service Regulation Fws 2018 Edition written by The Law The Law Library and published by Createspace Independent Publishing Platform. This book was released on 2018-10-24 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Endangered and Threatened Wildlife and Plants - Designation of Critical Habitat for Lost River Sucker and Shortnose Sucker (US Fish and Wildlife Service Regulation) (FWS) (2018 Edition) The Law Library presents the complete text of the Endangered and Threatened Wildlife and Plants - Designation of Critical Habitat for Lost River Sucker and Shortnose Sucker (US Fish and Wildlife Service Regulation) (FWS) (2018 Edition). Updated as of May 29, 2018 We, the U.S. Fish and Wildlife Service, designate critical habitat for the Lost River sucker and shortnose sucker under the Endangered Species Act. In total, approximately 146 miles (234 kilometers) of streams and 117,848 acres (47,691 hectares) of lakes and reservoirs for Lost River sucker and approximately 136 miles (219 kilometers) of streams and 123,590 acres (50,015 hectares) of lakes and reservoirs for shortnose sucker in Klamath and Lake Counties, Oregon, and Modoc County, California, fall within the boundaries of the critical habitat designation. The effect of this regulation is to conserve Lost River sucker's and shortnose sucker's habitat under the Endangered Species Act. This book contains: - The complete text of the Endangered and Threatened Wildlife and Plants - Designation of Critical Habitat for Lost River Sucker and Shortnose Sucker (US Fish and Wildlife Service Regulation) (FWS) (2018 Edition) - A table of contents with the page number of each section
