Download or read book Sustaining the Recovery of Lake Sturgeon Acipenser Fulvescens in the North Saskatchewan River of Alberta written by Owen B. Watkins and published by . This book was released on 2016 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nearly all Lake Sturgeon (Acipenser fulvescens) populations across North America have experienced losses to historic abundances estimated to be > 99%. This species is especially vulnerable to overharvest, habitat degradation, river fragmentation from dams, and is slow to recover due to life history characteristics. In the Alberta section of the North Saskatchewan River, Canada, passive management strategies led to overharvest, and combined with poor water quality, contributed to the collapse of the Lake Sturgeon population circa 1940. However, improved water quality beginning in the 1960s, along with the implementation of a zero-harvest regulation in 1997 prompted a Lake Sturgeon population recovery. Lake Sturgeon population viability remained questionable with low population abundance with particularly few adult fish, complicated by industrial development, and an increasing human population. Furthermore, the North Saskatchewan River has a popular multi-species sport fishery, complicating Lake Sturgeon management and recovery. My objective is to determine whether the status of the Lake Sturgeon population in the North Saskatchewan River in Alberta is declining, improving or remaining the same. To address this objective I required knowledge of Lake Sturgeon life history and sources of mortality. More specifically, I investigated: 1) population metrics for a status assessment, 2) a resource selection function for identification of important habitat using inputs from telemetry and land classification data, 3) defining technological limitations of telemetry information and 4) an assessment of current rates of angling mortality and management options for Lake Sturgeon recovery. I found that both recruitment and adult abundance had increased in the most recent years (2008 to 2012), even though the total mortality rate was higher than the 7% threshold proposed by the Alberta Lake Sturgeon Recovery Team. However, a high rate of somatic growth implies that abundance in the North Saskatchewan River is still below carrying capacity. Telemetry of 58 Lake Sturgeon over a 38-month period suggested that the population used the entire section of the North Saskatchewan River downstream from Drayton Valley, Alberta to the Alberta-Saskatchewan border. Additionally, some fish moved exceptional distances (> 925 rkm) between Alberta and Saskatchewan, illustrating the importance of river connectivity. Landscape classifications adjacent to the river were ineffective predictors of Lake Sturgeon congregations. There was a difference in habitat selection by males and females, with females found further downstream, but occupying similar slope gradients as the males. Small-scale details of habitat selection could not be investigated because of the technical limitations of existing telemetry technology. I found that radio telemetry detections from an aircraft were dependent upon transmitter type, water depth, receiver altitude, and scanning time. Larger transmitters were detected from a greater distance than smaller transmitters and the probability of detection was highest at a receiver altitude of 300 m when the two transmitter types were at a depth of 1 m. Furthermore, my relocations of the two transmitter types based upon maximum signal strength had a precision of ± 177 m distance for all depths and receiver altitudes from the actual transmitter location. I provide six probability of detection models for researchers to quantify their telemetry equipment. For investigating recovery management options, I used a theoretical objective of having a total population of 5,000 Lake Sturgeon, with an occasional fish surviving to 100-years. This requires total mortality to be approximately 5%, although my current estimate of total mortality is approximately 9.4%. To achieve my population objective, mortality must be significantly reduced. Estimates from catch and release fishing by three angler groups (non-specific anglers, anglers targeting sturgeon and research anglers) suggests that sport angling and its associated incidental mortality results in fewer than 18 dead Lake Sturgeon annually and further restrictions on sport angling are currently unnecessary. My only remaining management option to improve Lake Sturgeon survival is through habitat protection. My telemetry data suggested 10 primary locations of Lake Sturgeon congregations. Existing provincial regulations (Class 'A' watercourse designations) currently protect approximately 30% of these congregation sites. To protect at least 75% of these areas, I propose 10 new Class 'A' extents that reduce the total area of current Class 'A' protection (from 64 to 58 river km), which provides an improved means for protecting Lake Sturgeon and habitat.

Download or read book Lake Sturgeon Acipenser Fulvescens Rafinesque in the North Saskatchewan River Alberta written by Daryl Watters and published by . This book was released on 1993 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Survey of the Lake Sturgeon Acipenser Fulvescens Fishery on the South Saskatchewan River Alberta written by L. A. Winkel and published by Alberta Sustainable Resource Development, Fisheries & Wildlife Management Division, Resource Status and Assessment Branch. This book was released on 2000 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Information in Support of a Recovery Potential Assessment of Lake Sturgeon Acipenser Fulvescens Western Hudson Bay Saskatchewan Nelson River and Great Lakes Upper St Lawrence Populations written by C.D. Lacho and published by . This book was released on 2021 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Life History Habitat and Distribution of the Lake Sturgeon Acipenser Fulvescens in the South Saskatchewan River Alberta written by Gordon Neal Haugen and published by . This book was released on 1969 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Lake Sturgeon Acipenser Fulvescens Movements Abundance and Harvest in the South Saskatchewan River Alberta written by Recreation, Parks & Wildlife Foundation and published by . This book was released on 1991 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Life History Habitat and Distribution of the Lake Sturgeon Acipenser Fulvescens in the South Saskatchewan River Alberta written by Gordon Neal Haugen and published by Fish and Wildlife Division, Department of Lands and Forests. This book was released on 1969 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lake Sturgeon Acipenser Fulvescens written by Alberta. Alberta Environmental Protection. Natural Resources Service and published by . This book was released on 1998 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alberta s Lake Sturgeon Management Plan written by David K. Berry and published by . This book was released on 1996 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Movement and Habitat Use of Lake Sturgeon Acipenser Fulvescens in the South Saskatchewan River System written by Christine D Lacho and published by . This book was released on 2013 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Regional Peer Review on the Recovery Potential Assessment Lake Sturgeon Acipenser Fulvescens Designatable Units 1 Western Hudson Bay Populations and 2 Saskatchewan Nelson River Populations written by and published by . This book was released on 2021 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluating Collection Rearing and Stocking Methods for Lake Sturgeon Acipenser Fulvescens Restoration Programs in the Great Lakes written by James Andrew Crossman and published by . This book was released on 2008 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Harvest of Lake Sturgeon Acipenser Fulvescens from the South Saskatchewan River Alberta Between 1968 and 1978 written by Duane S. Radford and published by . This book was released on 1980 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Changes in Lake Sturgeon Acipenser Fulvescens Habitat in the South Saskatchewan River Under Regional Climate Change written by Kerry Head and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alberta Lake Sturgeon Recovery Plan 2011 2016 written by Alberta Lake Sturgeon Recovery Team and published by . This book was released on 2012 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The 1973 Harvest of Lake Sturgeon Acipenser Fulvescens from the South Saskatchewan River written by Radford, D. S. (Duane S.) and published by Department of Lands and Forests. This book was released on 1973 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of a Workshop on the Lake Sturgeon Acipenser Fulvescens written by C. H. Olver and published by Toronto, ON : Ministry of Natural Resources. This book was released on 1987 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: