2016 Genetic Diversity Monitoring of White Sturgeon in the Kootenai Tribe of Idaho Native Fish Conservation Aquaculture Program and Study of 10N Reproductive Development PDF Download
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Author: Andrea Schreier
Publisher:
ISBN:
Category : Hatchery fishes
Languages : en
Pages : 18
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Book Description
"The Kootenai Tribe of Idaho's Native Fish Conservation Aquaculture Program (KTOI NFCAP) has been propagating and releasing white sturgeon to support the endangered Kootenai River white sturgeon population since the early 1990s. Because genetic diversity loss often accompanies captive breeding programs, an important goal of the NFCAP is to preserve the wild population's genetic diversity and protect its adaptive potential. Since 2006, the Genomic Variation Laboratory (GVL) has been conducting genetic monitoring of the Tribe's white sturgeon conservation aquaculture program. We've used neutral microsatellites to measure the amount of genetic diversity present in the wild population and monitor the amount of diversity represented in each year class produced. Individual genotypes determined by the monitoring project can be used as genetic tags for parentage analysis for future NFCAP broodstock management. Parentage analysis can be conducted on potential broodstock of hatchery origin to prevent crossing close relatives (e.g. full siblings). Here we present the results of genetic monitoring of the 2016 year class."--Introduction (page 2).
Author: Andrea Schreier
Publisher:
ISBN:
Category : Hatchery fishes
Languages : en
Pages : 18
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Book Description
"The Kootenai Tribe of Idaho's Native Fish Conservation Aquaculture Program (KTOI NFCAP) has been propagating and releasing white sturgeon to support the endangered Kootenai River white sturgeon population since the early 1990s. Because genetic diversity loss often accompanies captive breeding programs, an important goal of the NFCAP is to preserve the wild population's genetic diversity and protect its adaptive potential. Since 2006, the Genomic Variation Laboratory (GVL) has been conducting genetic monitoring of the Tribe's white sturgeon conservation aquaculture program. We've used neutral microsatellites to measure the amount of genetic diversity present in the wild population and monitor the amount of diversity represented in each year class produced. Individual genotypes determined by the monitoring project can be used as genetic tags for parentage analysis for future NFCAP broodstock management. Parentage analysis can be conducted on potential broodstock of hatchery origin to prevent crossing close relatives (e.g. full siblings). Here we present the results of genetic monitoring of the 2016 year class."--Introduction (page 2).
Author: Paul J. Anders
Publisher:
ISBN:
Category : Fish hatcheries
Languages : en
Pages : 13
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Book Description
"The Kootenai Tribe of Idaho proposed an experimental hatchery program to address the decline of the white sturgeon population in the Kootenai River. Since its inception in 1990, the Kootenai River White Sturgeon Conservation Aquaculture Program has continued to meet its objective of reducing the threat of extinction by providing annual year classes from native broodstock, representing inherent genetic variability in its broodstock and progeny groups, and minimizing the introduction or transmission of pathogens or disease to the wild (source) population. By the late 1990s it became clear that non-hatchery efforts to restore recruitment were failing to counteract the extinction threat. This trend continues to the present (2008). In 2004 updated demographic analysis suggested that as few as 500 adults remained in the population, and triggered increased hatchery production for demographic and genetic conservation. In 2005, a report was prepared describing endangered Kootenai River white sturgeon population trends and causal factors of decline along with program history, protocols, and accomplishments during its first 15 years of operation (KTOI 2006). Subsequent data analysis revealed newly reduced survival rates based on lower recapture frequencies of earlier life stages and release groups of smaller fish. Embryos and free-embryos (yolks-sac larvae) released during several years in the early 2000s have provided no evidence for post-release survival to date. Review of these analyses warranted an updated report to recommend and delineate 2008 operational changes for the program. This report includes a brief program history for perspective, a summary of postrelease survival analyses of early life stages released from the Kootenai Hatchery (Justice and Pyper 2007), and recommends program operational changes for 2008. This report does not address hatchery operations beyond 2008 because the Program is currently involved in Step 1 of the Northwest Power and Conservation Council's 3- Step Hatchery Master Planning process. Recommendations regarding Program facility and operational changes beyond 2008 will be reported in future Master Planning documents."--Program overview.
Author: Andrea Marie Schreier
Publisher:
ISBN: 9781267400901
Category :
Languages : en
Pages :
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Book Description
The application of genetic markers to investigate evolutionary and ecological questions about white sturgeon, Acipenser transmontanus, has been limited due to the species' highly duplicated nuclear genome. Here, polysomic microsatellite markers were used to 1) examine the ancestral level of genome duplication in white sturgeon, 2) examine genetic diversity and patterns of population structure within and among drainages across the species' range, and 3) provide genetic monitoring for a conservation aquaculture program sustaining an endangered white sturgeon population. In the first chapter, we followed the inheritance of eight microsatellite markers in 15 families of white sturgeon from a commercial caviar farm to determine whether white sturgeon (~250 chromosomes) should be classified as tetraploid or octoploid. The eight microsatellite loci were detected predominantly in four or eight copies, with one locus observed in>8 copies. Numbers of alleles per locus, patterns of allele transmission, and inference of gene copy number in parents suggested that white sturgeon should be considered ancient octoploids. The discovery of dodecaploid parents and their decaploid offspring in the farm population, confirmed by flow cytometry analysis, indicated that some aspect of sturgeon aquaculture was inducing spontaneous autopolyploidy in white sturgeon. Next, microsatellite markers were applied to examine white sturgeon population structure across the species' range. Population assignment testing was used to determine the origin of white sturgeon sampled in non-natal estuaries, or those not containing a spawning population, to evaluate marine dispersal behavior. The Sacramento-San Joaquin River system was found to contain a single white sturgeon population while the Fraser River exhibited a hierarchical pattern of population structure. Strong levels of genetic divergence were detected above and below a natural barrier, Hells Gate, and fine-scale population substructure was identified above Hells Gate. Population structure in the Columbia River drainage (including the mainstem Columbia and Snake Rivers) was complex and suggested a pattern of isolation by distance. Net downstream gene flow also may have contributed to this pattern, with individuals migrating downstream through impoundments and over barriers with little upstream movement possible. There was no support for the current practice of managing each impounded reach on the Columbia or Snake rivers as a separate population. Lack of population structure within historically continuous river habitat found across the species' range suggested spawning site fidelity in white sturgeon may occur on a regional scale, with local gene flow among geographically proximate spawning sites. Population assignment of samples collected from non-natal estuaries indicated that all populations with ocean access make marine migrations, and individuals did not necessarily originate from the nearest spawning population. Finally, microsatellites were used to conduct genetic monitoring of the Kootenai Tribe of Idaho's conservation aquaculture program (CAP) for the endangered Kootenai River white sturgeon population. Continuous recruitment failure in this population has left it entirely dependent on the CAP for reproduction. A genetic profile database of wild broodstock used in the CAP was created to monitor hatchery-induced genetic changes in the Kootenai River population. Broodstock genotypes also were used to evaluate the accuracy of parentage assignment in the Kootenai River population, as hatchery managers soon will depend on this analysis to prevent inbreeding when most sexually mature adults available for captive breeding will be derived from hatchery production. Numbers of alleles and numbers of alleles per individual per locus were calculated to monitor the amount of wild type genetic diversity captured in broodstock utilized by the CAP. Parentage analysis with 18 microsatellite markers was validated in known hatchery families from the 2010 year class. Genetic diversity in the Kootenai River population was very low relative to other populations examined, likely due to founder effects and genetic drift after isolation from the mainstem Columbia c. 10,000 YBP. In less than one sturgeon generation, 96% of Kootenai River genetic diversity has been captured in broodstock that contributed offspring that survived to release in the Kootenai River and further propagation will likely preserve additional genetic variation. The 18 microsatellite panel improved parentage assignment accuracy and allowed a greater number of assignments relative to the previous panel used for parentage analysis, suggesting that this technique may become a useful tool in the management of this vulnerable population.
Author: United States. Bonneville Power Administration
Publisher:
ISBN:
Category : Fish habitat improvement
Languages : en
Pages : 74
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Book Description
Author: G.T.O LeBreton
Publisher: Springer Science & Business Media
ISBN: 1402028334
Category : Science
Languages : en
Pages : 336
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Book Description
Modern North American sturgeons and paddlefish are the result of 100 million years of evolution. Once an integral part of aboriginal culture, their numbers were decimated by overfishing and habitat destruction during the past two centuries. This book details the extensive science aimed at helping these remarkable species recover from the brink of extinction, and describes the historical, biological, and ecological importance of North American sturgeon and paddlefish. The text is enhanced by photographs and detailed line drawings. This comprehensive volume will be an invaluable resource for researchers, educators, and consultants, in academic and government settings, who work to further scientific understanding of these fishes. No other single compilation has documented current information in such detail.
Author: Harold L. Kincaid
Publisher:
ISBN:
Category : Rare fishes
Languages : en
Pages : 16
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Book Description
Author: Tatiana A. Dettlaff
Publisher: Springer Science & Business Media
ISBN: 3642770576
Category : Science
Languages : en
Pages : 309
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Book Description
This book is the first comprehensive description of development of the Acipenserid fish published in the English language. It con tains the results of more than 40 years of studies by the authors and their colleagues. My own life in science has been intimately related both with the authors and the fish, which are the subject of this book. Therefore, it gives me a great pleasure to present to the English reader an expanded version of the book. Those interested in the history of biology must be well aware of the fact that genetics in the USSR was practically demolished by Lysenko at the session of the Lenin All-Union Academy of Agricultural Sciences in 1948. However, it is much less well known that other fundamental branches of biology were also persecuted at that time, experimental embryology (developmental mechanics) among them. As a result, many embryologists, in cluding the authors of this book, were forced to turn to more ap plied problems, this being the only way to continue research. They had to abandon amphibians and concentrate their efforts on sturgeon.
Author: Ramón Carmona
Publisher: Springer Science & Business Media
ISBN: 1402084374
Category : Science
Languages : en
Pages : 465
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Book Description
Sturgeons are considered “living fossils”, sharing many morphological and biological features with ancestral fish. Furthermore, sturgeons are of the utmost interest from an economic perspective, not only for the caviar but for the flesh. However, the wild populations of the majority of the species are at serious risk of extinction all over the world. So, it is urgent to develop strategies for both farming culture and conservation and recovery in natural habitats. This book provides a comprehensive view of the biology and sustainable development of sturgeons putting emphasis on the Southern Europe autochthonous species such as Acipenser nacarii and Acipenser sturio that share geographical distribution. Other relevant species (such as Huso huso, A. oxyrhinchus, A. ruthenus, A. stellatus) and areas (Germany, Russia, North America) are also considered. The contents are organised in three sections: Taxonomy and Biogeography (including the morphological and genetic analyses that clarify the taxonomy and phylogeny of sturgeons, focused on those from Southern Europe), Biology and Aquaculture (where several aspects of the developmental biology, feeding, and reproduction are considered in relation to the improvement of sturgeon farming), and Recovery and Conservation (that collates and analyses different recovery research actions, the ecology of the rivers for restoration as well as the problems related to the trade of caviar).
Author: Patrick J. Babin
Publisher: Springer Science & Business Media
ISBN: 1402062354
Category : Science
Languages : en
Pages : 513
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Book Description
This book presents a comprehensive overview on egg production in fish, from the standpoint of the oocyte. It covers oocyte development, maturation, hydration and fertilization. The book places special emphasis on using state-of-the-art tools for discerning the ultra-structure of the follicle and genomic/proteomic tools to fully understand biological basis of fish reproduction.
Author: Fred Sequin Conte
Publisher: UCANR Publications
ISBN: 9780931876844
Category : Technology & Engineering
Languages : en
Pages : 124
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