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Assessment And Requirements Of Sauger And Walleye Populations In The Lower Yellowstone River And Its Sic Tributaries
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Book Synopsis Assessment and Requirements of Sauger and Walleye Populations in the Lower Yellowstone River and It's [sic] Tributaries by : Russell F. Penkal
Download or read book Assessment and Requirements of Sauger and Walleye Populations in the Lower Yellowstone River and It's [sic] Tributaries written by Russell F. Penkal and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessment and Requirements of Sauger and Walleye Populations in the Lower Yellowstone River and It's Sic Tributaries by :
Download or read book Assessment and Requirements of Sauger and Walleye Populations in the Lower Yellowstone River and It's Sic Tributaries written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Competition Potential Between Sauger and Walleye in Non-native Sympatry by : Brian Joseph Bellgraph
Download or read book Competition Potential Between Sauger and Walleye in Non-native Sympatry written by Brian Joseph Bellgraph and published by . This book was released on 2006 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sauger, Sander canadensis, populations throughout Montana and North America have exhibited declines over the past few decades. Sauger population abundance declined in the middle Missouri and Yellowstone rivers of Montana in the mid-1980s following a period of drought. Higher flows resulted in a rebound of the lower Yellowstone River population; however, the middle Missouri River population has remained at low abundance. Various factors may contribute to the reduced population abundance of sauger in the middle Missouri River, including interspecific competition with walleye, Sander vitreus. Historical trend data of sauger and walleye were assessed to determine long-term trends of sauger and walleye fitness. To assess competition potential, seasonal migrations, habitat use, and diets of both species were compared in the middle Missouri River. Trophic position of sauger was also compared between the middle Missouri and Yellowstone rivers to evaluate the trophic status of sauger in sympatry and allopatry with walleye. Sauger and walleye were tracked using radio telemetry to establish and compare seasonal migrations. Habitat use was compared at three hierarchical scales, diets were collected on fish sampled using electrofishing, and diet overlap was calculated. Trophic position was calculated using stable isotope analysis. Historical trend data indicated that sauger and walleye are currently at low abundance and sauger had low relative weights, which is likely due to low prey availability. Prior to the presumed spawning period, 96% of the sauger and 57% of the walleye migrated downstream as far as 273 km. After spawning, both species returned to previously-occupied river reaches and demonstrated site fidelity during the non-migratory season. Habitat use and selection by sauger and walleye were similar at all three hierarchical scales. Diet overlap was high during the spring [0.72 (SE=0.003)] and summer [0.95 (SE=0.0008)] and moderate during autumn [0.49 (SE=0.003)]. Sauger trophic position differed statistically between the middle Missouri and Yellowstone rivers; however, the biological consequences of the difference are uncertain. Overall, resource overlap of sauger and walleye in the middle Missouri River, Montana suggests that competition potential between these species is high, which may preclude the recovery of native sauger populations if resources are limiting.
Book Synopsis Conservation Genetics of Sauger in the Upper Missouri River Drainage by : Daniel Michael Bingham
Download or read book Conservation Genetics of Sauger in the Upper Missouri River Drainage written by Daniel Michael Bingham and published by . This book was released on 2011 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybridization with non-native walleye may play a substantial role in sauger declines throughout the upper Missouri River drainage of Montana and Wyoming. I identified 11 microsatellite loci to detect interspecific hybridization and describe the genetic population structure of sauger. Two major population groupings of sauger were revealed by principal component analysis. The first consisted of samples from the Missouri and lower Yellowstone River drainages, which showed no evidence for genetic divergence among each other. The second major grouping contained samples from the Bighorn River drainage and the upper Yellowstone River. Samples from the upper Bighorn River drainage were genetically distinct from downstream samples. The Bighorn and upper Yellowstone River samples had substantially lower heterozygosity and allelic richness than the lower Yellowstone and Missouri River samples. Analysis of simulated data sets suggested that 100% of sauger and walleye and 100% of first and second generation hybrids could be correctly identified using these 11 loci. This indicates that my analysis method has the power to discriminate sauger and walleye and to detect hybridization and introgression. I detected only eighteen hybrids out of 925 individuals analyzed. Hybridization appeared recent, as nearly 50% of the hybrids showed significant evidence for having a non-hybrid ancestor within two generations. Only one hybrid was detected in the Missouri River. All others were found in the Yellowstone River drainage, despite a substantially higher rate of walleye stocking in the Missouri River drainage. Environmental conditions in the Yellowstone River drainage may be more conducive to hybridization, or hybrid and walleye survival. The rarity of hybrids, despite massive walleye stocking, is unexpected. Introgression of walleye genes into native sauger does not appear to be an immediate threat. Nevertheless, the presence of hybrids could still be harmful because their production represents wasted reproductive effort. Given my results, I recommend that (1) the transfer of genetically distinct stocks of sauger not take place; (2) historical levels of gene flow among populations be restored; and (3) the walleye fishery in the upper Missouri River drainage be replaced with a sauger or sterile walleye fishery.
Book Synopsis Sauger Population Demographics, Evaluation of Harvest Regulations and Population Connectivity in Large Midwestern Rivers by : Kasey L. Yallaly
Download or read book Sauger Population Demographics, Evaluation of Harvest Regulations and Population Connectivity in Large Midwestern Rivers written by Kasey L. Yallaly and published by . This book was released on 2018 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sauger Sander canadensis are a native top level predator and popular sport fish. They are native to large, turbid midwestern rivers and are a highly migratory species that relies on unrestricted access to specific habitats throughout their lifespan. Due to specific habitat requirements and popularity as a sport fish, Sauger are in decline across much of their range. Habitat alterations including barriers, channelization and sedimentation, as well as overharvest, have resulted in population declines. Sauger are often subject to relatively high levels of exploitation because of their tendency to concentrate below dams during migrations, which leaves them vulnerable to anglers. The lower Kaskaskia River below Carlyle Lake dam and the lower Ohio River contain important Sauger sport fisheries despite the presence of multiple dams on both rivers and the potential for high levels of exploitation. However, effects of current and potential harvest regulations on Sauger stocks in the Kaskaskia and Ohio rivers have not been assessed. From previous annual monitoring surveys, Sauger in the Ohio and Kaskaskia rivers have very different size and age structures and are managed under different regulations. Additionally, the Kaskaskia River and its largest reservoir (Carlyle Lake) are stocked annually with Sauger, but the contributions of stocked Sauger and immigrants from the Mississippi River to the Kaskaskia River Sauger stock are unknown. I first sought to assess population demographics of Sauger in the Kaskaskia and Ohio Rivers to gain a baseline understanding of both populations and then used these data to evaluate harvest regulations on each river. This objective tested the null hypothesis that no differences in recruitment indices, growth rates and mortality rates exist between Sauger populations within each river. Sauger in the Kaskaskia River are currently managed under a 356-mm minimum length limit and a 6-fish daily bag limit. Prior to 2018, the lower Ohio River was managed under no minimum length limit and a 10-fish daily bag limit. To assess the contribution of Sauger from different environments to the Kaskaskia River stock, I used otolith microchemistry to infer recruitment sources of fish and assess movement of fish between the Kaskaskia and middle Mississippi rivers. This objective tested the null hypothesis that no difference existed in the contribution of different rivers to the Kaskaskia River sauger population. The Ohio River Sauger population had a small age and size structure relative to the Kaskaskia River. Sauger from each river exhibited fast growth rates and high annual mortality. Population modeling indicated that the current 356-mm minimum size limit for Sauger in the Kaskaskia River is sufficient at preventing growth overfishing and is likely resulting in the larger size structure compared to the Ohio River. Sauger were likely experiencing growth and recruitment overfishing in the Ohio River under no minimum length limit and will likely benefit from the 356-mm minimum length limit implemented in 2018. Otolith microchemistry revealed that Sauger from the Mississippi River represented a small contribution to the Kaskaskia River Sauger stock; however, some fish showed evidence of moving between the Kaskaskia and Mississippi rivers. Similar water chemistry between the hatchery and Carlyle Lake prevented the identification of hatchery origin Sauger. Because the Sauger stock in the Kaskaskia River appears to be primarily supported by stocking of fish into Carlyle Lake or natural reproduction within the Kaskaskia River, fisheries managers should focus on quantifying the contribution of hatchery fish to the Kaskaskia River stock.
Book Synopsis Assessment of Walleye, Sauger, and Black Bass Populations in Lewis and Clark Lake, South Dakota by : Brian E. Van Zee
Download or read book Assessment of Walleye, Sauger, and Black Bass Populations in Lewis and Clark Lake, South Dakota written by Brian E. Van Zee and published by . This book was released on 1996 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Introgression Between Introduced Walleye and Native Sauger in Fort Peck Reservoir and the Yellowstone River, Montana by : Robb F. Leary
Download or read book Introgression Between Introduced Walleye and Native Sauger in Fort Peck Reservoir and the Yellowstone River, Montana written by Robb F. Leary and published by . This book was released on 1997 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Assessment of the Huron River Walleye Population by : Joseph M. Leonardi
Download or read book An Assessment of the Huron River Walleye Population written by Joseph M. Leonardi and published by . This book was released on 2000 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Walleye and Sauger Recruitment Assessment in Pools 5, 8 and 10 of the Mississippi River by : Heidi A. Langrehr
Download or read book Walleye and Sauger Recruitment Assessment in Pools 5, 8 and 10 of the Mississippi River written by Heidi A. Langrehr and published by . This book was released on 1988 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessment of Continuous Walleye-sauger Fishing at Lock and Dam No. 3 and 4 of the Mississippi River, 1968-74 by : Richard B. Sternberg
Download or read book Assessment of Continuous Walleye-sauger Fishing at Lock and Dam No. 3 and 4 of the Mississippi River, 1968-74 written by Richard B. Sternberg and published by . This book was released on 1974 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lower Yellowstone River Fishery Study by : Michael H. Haddix
Download or read book Lower Yellowstone River Fishery Study written by Michael H. Haddix and published by . This book was released on 1976 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fishes of Vermont by : Richard W. Langdon
Download or read book Fishes of Vermont written by Richard W. Langdon and published by . This book was released on 2006-01-01 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Foragers of the Terminal Pleistocene in North America by : Renee Beauchamp Walker
Download or read book Foragers of the Terminal Pleistocene in North America written by Renee Beauchamp Walker and published by U of Nebraska Press. This book was released on 2007-01-01 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: These essays cast new light on Paleoindians, the first settlers of North America. Recent research strongly suggests that big-game hunting was but one of the subsistence strategies the first humans in the New World employed and that they also relied on foraging and fishing.
Book Synopsis Condition of the World's Aquatic Habitats by :
Download or read book Condition of the World's Aquatic Habitats written by and published by . This book was released on 1995 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biology, Management, and Culture of Walleye and Sauger by : Bruce A. Barton
Download or read book Biology, Management, and Culture of Walleye and Sauger written by Bruce A. Barton and published by . This book was released on 2011-01-01 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis British Prosobranch Molluscs by : Vera Fretter
Download or read book British Prosobranch Molluscs written by Vera Fretter and published by Scion Publishing. This book was released on 1994 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work offers detailed information on British prosobranch molluscs.
Author :Brian W. Coad Publisher :Waterdown Ont. : Canadian Sportfishing Productions ISBN 13 :9780969239178 Total Pages :0 pages Book Rating :4.2/5 (391 download)
Book Synopsis Encyclopedia of Canadian Fishes by : Brian W. Coad
Download or read book Encyclopedia of Canadian Fishes written by Brian W. Coad and published by Waterdown Ont. : Canadian Sportfishing Productions. This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: