Relevant bibliographies by topics / White sturgeon White sturgeon

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Academic literature on the topic 'White sturgeon White sturgeon'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "White sturgeon White sturgeon"

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DiLauro, Martin N., Wayne Kaboord, Rosemary A. Walsh, William F. Krise, and Michael A. Hendrix. "Sperm-cell ultrastructure of North American sturgeons. I. The Atlantic sturgeon (Acipenser oxyrhynchus)." Canadian Journal of Zoology 76, no. 10 (October 1, 1998): 1822–36. http://dx.doi.org/10.1139/z98-127.

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Atlantic sturgeon (Acipenser oxyrhynchus) and lake sturgeon (Acipenser fulvescens) sperm-cell morphologies were examined using scanning electron microscopy. Major differences were found in four of nine metrics, all in the head region of the cell. Atlantic sturgeon sperm cells were much shorter than those of lake sturgeon. Anterior head width exceeded posterior head width, in contrast to the arrangement in lake sturgeon sperm cells. Lake sturgeon sperm cells are nearer in size to those of other sturgeons than are Atlantic sturgeon sperm cells. Comparisons were made with sperm-cell structures known from other sturgeon species, including the Russian sturgeon (Acipenser gueldenstaedti colchicus), stellate sturgeon (Acipenser stellatus), Chinese sturgeon (Acipenser sinensis), and white sturgeon (Acipenser transmontanus). Variation in cell morphology may indicate evolutionary relationships. In addition, the fine structure of Atlantic sturgeon sperm cells was examined using transmission electron microscopy and selected metrics are described. The cell possesses a distinct acrosome, a midpiece, and a single flagellum. A comparison is made with ultrastructural details of the sperm cells of stellate and white sturgeons. Similarities among these species include radial symmetry about the longitudinal axis, an elongate shape, a distinct acrosome, and the presence of endonuclear canals. Noteworthy differences include a smaller total length and width than stellate and white sturgeon sperm cells. The main sperm-cell body is approximately 4 µm long and the flagellum about 37 µm long, resulting in a total cell length of about 41 µm. Also, the Atlantic sturgeon sperm cell possesses only two membraned endonuclear canals, in contrast to the arrangement in white and stellate sturgeons, where three such organelles are found. A structural connection of unknown function between the nuclear fossa and proximal centriole is also present in the Atlantic sturgeon sperm cell. Sperm-cell nuclei of white and stellate sturgeons are elongate trapezoids, with the anterior end narrower, whereas in Atlantic sturgeon the anterior portion of the trapezoid is wider than the posterior. Structural similarities between species may indicate a commonality of ancestral and evolutionary relationships that may have taxonomic implications. Ultrastructure suggests a closer evolutionary relationship between the white and stellate sturgeon than between either of these species and the Atlantic sturgeon. The present findings may be used by biologists studying the reproductive physiology, forensics, taxonomy, and genetics of sturgeons.
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DiLauro, Martin N., Wayne S. Kaboord, and Rosemary A. Walsh. "Sperm-cell ultrastructure of North American sturgeons. III. The lake sturgeon (Acipenser fulvescens Rafinesque, 1817)." Canadian Journal of Zoology 78, no. 3 (April 1, 2000): 438–47. http://dx.doi.org/10.1139/z99-241.

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Lake sturgeon (Acipenser fulvescens) sperm cell fine structure was examined using transmission electron microscopy. The cell possesses a distinct acrosome, a defined head region, a midpiece, and a single flagellum. Sperm cells of this species share a general radial symmetry, an elongate shape, a distinct acrosome, and the presence of endonuclear canals with those of other sturgeons. The mean length of the lake sturgeon sperm cell body (acrosome + nucleus + midpiece) is approximately 7.13 µm and the length of the flagellum is about 50 µm, resulting in a total cell length of about 57 µm. The lake sturgeon sperm cell is much longer and slightly wider than that of the Atlantic sturgeon. The sperm-cell nuclei of lake, shortnose, white, and stellate sturgeons are elongate trapezoids in shape, with the anterior (acrosome) end narrowest but, in the Atlantic sturgeon, the anterior portion of the trapezoid is wider than the posterior. Although slightly smaller in total length and width, the lake sturgeon sperm cell is most similar to the shortnose sperm cell in ultrastructure, overall size, and shape; it also shares similarity of shape with the stellate and white sturgeon sperm cells. The cell nuclei of these four sturgeons have three endonuclear canals. The acrosome of the lake sturgeon sperm cell has longer posterolateral projections than that of the Atlantic or shortnose sturgeon sperm cell. A structural connection, the fibrous body, is present in the lake sturgeon sperm cell between the nuclear fossa and the proximal centriole, as in the Atlantic and shortnose sturgeon sperm cells. Our results suggest a more recent evolutionary linkage between the lake and shortnose sturgeons than with the Atlantic sturgeon. This work presents the first ultrastructural description of the lake sturgeon sperm cell.
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DiLauro, Martin N., Wayne S. Kaboord, and Rosemary A. Walsh. "Sperm-cell ultrastructure of North American sturgeons. II. The shortnose sturgeon (Acipenser brevirostrum, Lesueur, 1818)." Canadian Journal of Zoology 77, no. 2 (August 1, 1999): 321–30. http://dx.doi.org/10.1139/z98-219.

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The fine structure of the sperm cell of the shortnose sturgeon (Acipenser brevirostrum) was examined using transmission electron microscopy and selected metrics. The cell possesses a distinct acrosome, a defined head region, a midpiece, and a single flagellum. The mean length of the sperm cell body (acrosome + nucleus + midpiece) is approximately 9.71 µm, and the length of the flagellum is about 37 µm, resulting in a total cell length of about 46 µm. The sperm cell of the shortnose sturgeon is much longer and slightly wider than that of the Atlantic sturgeon. The nuclei of shortnose, white, and stellate sturgeon sperm cells are elongate trapezoids with the anterior (acrosome) end narrowest, the opposite of that of the Atlantic sturgeon. Although slightly smaller in total length and width than the sperm cells of the stellate and white sturgeons, that of the shortnose sturgeon is most similar to them in overall ultrastructure, as all three cells have three endonuclear canals. A structural connection of unknown function between the nuclear fossa and the proximal centriole, which is similar to the fibrous body in other species, is present in the shortnose sturgeon sperm cell. Our results suggest a more recent evolutionary link between the shortnose, white, and stellate sturgeons than between any of these and the Atlantic sturgeon. This is the first description of sperm cell ultrastructure in the shortnose sturgeon, an endangered species.
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Trenkler, I. V. "The aquaculture of Acipenseriformes. Part 6. Northern and South America." Rybovodstvo i rybnoe hozjajstvo (Fish Breeding and Fisheries), no. 10 (October 1, 2020): 68–79. http://dx.doi.org/10.33920/sel-09-2010-07.

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The history and contemporary state of global aquaculture of sturgeons and paddlefish are reviewed. The paddlefish Polyodon spathula became first object of cultivation of Acipenseriformes in USA. The paddlefish has high rate of growth in ponds using natural feeds, mature females can produce about 15% of their body weight in roe similar to eggs of star sturgeon Acipenser stellatus. Some liabilities include juveniles vulnerable to bird predation, poor tolerance to high densities, low oxygen and handling stress, waiting period of at least 7 years before females produce eggs. The paddlefish farming is carried out mainly in Kentucky, Indiana, Missouri and Alabama in polyculture with canal catfish Ictalurus punctatus or freshwater shrimp Macrobrachium rosenbergii. The most important object of North-American sturgeon breeding is white sturgeon Acipenser transmontanus, the biggest and fast-growing species of Acipenser genera. The largest commercial sturgeon farms are located in California, Idaho and Florida. A research program on biotechnology of white sturgeon farming has been initiated by the University of California at Davis in December 1979. The first successful artificial propagation of white sturgeon from Sacramento River was carried out in 1980, the first hatchery females matured in 1994. The hatchery progeny of Snake River white sturgeon was received in 1988, the first females matured in 2000. The first caviar was processed only after maturation of second generation. In Florida and North Carolina farmers used for cultivation small number of Russian sturgeon A. gueldenstaedti, Siberian sturgeon A. baeri, sterlet A. ruthenus, beluga Huso huso and star sturgeon A. stellatus. The total annual volume of sturgeon farming in USA was equal to 1285 tons (1166 MT). In Canada the only object of sturgeon farming is white sturgeon with annual production near 2 tons of caviar. In South America Uruguay has developed sturgeon culture with one large farm created in 1994 using help of Russian specialists.
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Yakovleva, Ekaterina, Valentina Shevchenko, and Vera Gnucheva. "PRELIMINARY RESULTS OF EXPERIMENTAL WORK ON PRODUCING OFFSPRING AND COMPARATIVE EVALUATION OF PURE SPECIES (WHITE STURGEON, FRINGEBARBEL STURGEON) AND THEIR INTERSPECIES HYBRIDS (WHITE STURGEON × FRINGEBARBEL STURGEON AND FRINGEBARBEL STURGEON × WHITE STURGEON)." Vestnik of Astrakhan State Technical University. Series: Fishing industry, no. 1 (March 17, 2020): 111–17. http://dx.doi.org/10.24143/2073-5529-2020-1-111-117.

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The article presents the comparative results of the experimental work on studying valuable pure species offspring (white sturgeon, fringebarbel sturgeon) and their interspecies hybrid forms (white sturgeon × fringebarbel sturgeon and fringebarbel sturgeon × white sturgeon) in the early stages of ontogenesis. The tests were carried out in the research and experimental base BIOS (the Astrakhan region) in 2019. The fish-breeding and biological characteristics of the producers of parental species that participated in the crossing to produce reciprocal hybrid forms are presented. The interbreeding scheme was developed. The complex study was conducted at the stage of the early ontogenesis. Observing over eggs development took place at all significant stages of embryogenesis. The survival rates of one-day prolarvae of all experimental groups, in relation to the eggs laid for the incubation, and their weight data became the result of the experiment. The results of the experimental work will help to develop proposals for the exploitation of broodstock producers of pure sturgeon species to produce hybrid offspring, which may have increased growth and survival rates both at the stages of embryogenesis and the active feeding of larvae, and during juveniles rearing, which is a promising factor for commercial aquaculture.
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DiLauro, Martin N., Rosemary A. Walsh, Michelle Peiffer, and Randy M. Bennett. "Sperm-cell ultrastructure of North American sturgeons. IV. The pallid sturgeon (Scaphirhynchus albus Forbes and Richardson, 1905)." Canadian Journal of Zoology 79, no. 5 (May 1, 2001): 802–8. http://dx.doi.org/10.1139/z01-036.

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Sperm-cell morphology and ultrastructure in the pallid sturgeon (Scaphirhynchus albus) were examined using transmission and scanning electron microscopy. Metrics and structure were compared with similar metrics obtained from other published descriptions of sturgeon sperm cells. General morphology was found to be similar to that of sperm cells of the white (Acipenser transmontanus), lake (A. fulvescens), stellate (A. stellatus), Chinese (A. sinensis), Russian (A. gueldenstaedti colchicus), and shortnose (A. brevirostrum) sturgeons, which all shared a gradual tapering of the nuclear diameter from posterior to anterior, unlike that of the Atlantic sturgeon (A. oxyrhynchus). The sperm cell of the pallid sturgeon was similar in size to that of the Atlantic sturgeon, being only slightly larger. The sperm cell of the pallid sturgeon differed from those of other sturgeons chiefly in the acrosomal region, where the posterolateral projections (PLP) have the shape of an acute triangle and are arranged in a spiral about the longitudinal axis of the cell. The PLP were longer than those of other sturgeons, being twice the length of those of the Atlantic sturgeon and 58% longer than those of the lake sturgeon. Also, in cross section the acrosome had the shape of a hollow cone rather than the cap of an oak tree acorn, as was found in ultrastructural studies of other sturgeons. In addition, we were able to confirm that the structural arrangement of the distal centriole of the midpiece is identical with that of the proximal centriole: nine sets of microtubular triplets around the periphery of the centriole. This information is of potential use to fishery biologists, forensic biologists, zoologists, reproductive physiologists, taxonomists, evolutionary biologists, and aquaculturists.
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Doszpoly, Andor, and Igor Shchelkunov. "Partial genome analysis of Siberian sturgeon alloherpesvirus suggests its close relation to AciHV-2 — Short communication." Acta Veterinaria Hungarica 58, no. 2 (June 1, 2010): 269–74. http://dx.doi.org/10.1556/avet.58.2010.2.13.

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Partial genome sequence of a herpes-like virus, isolated from Siberian sturgeon ( Acipenser baeri ), was determined and subjected to phylogenetic analysis. The virus (SbSHV) has been shown to be the causative agent of an acute disease with high mortality in farmed juvenile sturgeons in Russia. Two fragments (of 7000 and 300 base pairs in length) encompassing 3 complete and 3 partial ORFs were amplified by PCR. Sturgeon herpesvirus strains, classified into species Acipenserid herpesvirus 2 (AciHV-2), have been isolated and partially sequenced from several regions (California, Idaho, Oregon and Canada) of North America from white ( A. transmontanus) and shortnose sturgeons ( A. brevirostrum ). The sequence of the SbSHV strain shared highest identity with that of the Canadian strain originating from shortnose sturgeon. The phylogenetic analysis also confirmed that SbSHV is closely related to AciHV-2 and could also be classified into this virus species. This is the first report on the occurrence of AciHV-2 in Europe. Previously, only another virus species, AciHV-1 has been detected in farmed white sturgeons in Italy. The size and position of ORFs in the examined gene block confirmed that this genomic region is highly conserved in members of the genus Ictalurivirus .
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Drennan, JD, SE LaPatra, JT Siple, S. Ireland, and KD Cain. "Transmission of white sturgeon iridovirus in Kootenai River white sturgeon Acipenser transmontanus." Diseases of Aquatic Organisms 70 (2006): 37–45. http://dx.doi.org/10.3354/dao070037.

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Burcea, Alexandru, Gina-Oana Popa, Iulia Elena Florescu (Gune), Marilena Maereanu, Andreea Dudu, Sergiu Emil Georgescu, and Marieta Costache. "Expression Characterization of Six Genes Possibly Involved in Gonad Development for Stellate Sturgeon Individuals (Acipenser stellatus, Pallas 1771)." International Journal of Genomics 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/7835637.

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Nowadays, in sturgeon’s aquaculture, there is a necessity for sex identification at early stages in order to increase the efficiency of this commercial activity. The basis for a correct identification is studying the different factors that influence the gonad development. The research has been directed towards molecular methods that have been employed with various degrees of success in identifying genes with different expression patterns between male and female sturgeons during their development stages. For the purpose of understanding the sexual development of 4-year-old stellate sturgeon (Acipenser stellatus) individuals, we have selected six genes (foxl2, cyp17a1, ar, dmrt1, sox9, and star). We analysed the gene expression of the selected genes for gonads, anal fin, liver, body kidney, and white muscle. The cyp17a1, ar, dmrt1, and sox9 genes have a significant higher expression in male gonads than in female gonads, while the data shows no significant differences in the expression of the investigated genes in the other organs. We investigate these genes to shed light on aquaculture sturgeon sexual development.
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Baker, D. W., V. Matey, K. T. Huynh, J. M. Wilson, J. D. Morgan, and C. J. Brauner. "Complete intracellular pH protection during extracellular pH depression is associated with hypercarbia tolerance in white sturgeon, Acipenser transmontanus." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 296, no. 6 (June 2009): R1868—R1880. http://dx.doi.org/10.1152/ajpregu.90767.2008.

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Sturgeons are among the most CO2 tolerant of fishes investigated to date. However, the basis of this exceptional CO2 tolerance is unknown. Here, white sturgeon, Acipenser transmontanus, were exposed to elevated CO2 to investigate the mechanisms associated with short-term hypercarbia tolerance. During exposure to 1.5 kPa Pco2, transient blood pH [extracellular pH (pHe)] depression was compensated within 24 h and associated with net plasma HCO3− accumulation and equimolar Cl− loss, and changes in gill morphology, such as a decrease in apical surface area of mitochondrial-rich cells. These findings indicate that pHe recovery at this level of hypercarbia is accomplished in a manner similar to most freshwater teleost species studied to date, although branchial mechanisms involved may differ. White sturgeon exposed to more severe hypercarbia (3 and 6 kPa Pco2) for 48 h exhibited incomplete pH compensation in blood and red blood cells. Despite pHe depression, intracellular pH (pHi) of white muscle, heart, brain, and liver did not decrease during a transient (6 h of 1.5 kPa Pco2) or prolonged (48 h at 3 and 6 kPa Pco2) blood acidosis. This pHi protection was not due to high intrinsic buffering in tissues. Such tight active cellular regulation of pHi in the absence of pHe compensation represents a unique pattern for non-air-breathing fishes, and we hypothesize that it is the basis for the exceptional CO2 tolerance of white sturgeon and, likely, other CO2 tolerant fishes. Further research to elucidate the specific mechanisms responsible for this tremendous pH regulatory capacity in tissues of white sturgeon is warranted.
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Dissertations / Theses on the topic "White sturgeon White sturgeon"

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Lu, Xiaonan. "Determining sexual maturity in white sturgeon (Acipenser transmontanus) to maximize yield and quality of caviar." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Spring2009/x_lu_012009.pdf.

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Oldenburg, Eric William. "Effects of acclimation on poststocking dispersal of age-1 pallid sturgeon." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/oldenburg/OldenburgE0508.pdf.

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Tashjian, Diran Hovsep. "Selenium toxicokinetics, chronic toxicity, and interaction with salinity stress in white sturgeon /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2005. http://uclibs.org/PID/11984.

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Gauthier-Fauteux, Simon. "Linking fluvial dynamics to white sturgeon habitat in the Nechako River, BC." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/60693.

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Considerable effort has been dedicated to restoring sturgeon habitat within dammed rivers. However, sedimentation causes long-term failure because interstitial voids provide critical habitat during early life-stages. Based on the premise that a better understanding of geomorphic processes will improve restoration design, this study characterizes flow and sediment transport dynamics through a white sturgeon spawning reach on the Nechako River, BC. An extensive dataset was collected throughout the 2015 flood. Bedload transport was sampled on 36 days with flows ranging from 44 m³/s to 656 m³/s. During a high flow of 525 m³/s, channel bathymetry and water surface elevation were surveyed and velocity profiles were collected across 9 transects. Banklines, bars and island topography were later surveyed during low flow. Sediment transport into the reach was positively related with discharge. This relation was non-linear and transport rates increased rapidly once flows exceeded 400 m³/s. The relation weakened with downstream distance and sediment transport peaked progressively later throughout the year. No relation was observed at the downstream end of the reach, where transport rates remained low and constant relative to upstream. Sediment was primarily transported through secondary channels conveying a disproportionate amount of sediment compared to flow. Within the single-thread channel, the locations conveying the greatest amount of sediment remained spatially consistent over time. Hydrodynamic modelling indicates the Burrard Ave. Bridge causes backwatering once discharge exceed 225-275 m³/s. Velocity, shear stress and transport capacity at the downstream end of the reach do not increase with discharge because of the backwatering and the expansion in channel width through the island complex. The locations of maximum shear stress and transport capacity shift upstream with increasing discharge, but shear stress does not exceed 23 N/m² for flows up to 775 m³/s. The fluvial dynamics within the spawning reach create challenges and opportunities for habitat restoration. Backwatering is problematic because it causes mid-reach deposition during high flows and limits shear stress magnitude over the downstream spawning substrate. Meanwhile, the presence of sediment transport pathways through secondary channels and within the mainstem can be used to site restoration projects in areas apt to maintain suitable habitat.
Arts, Faculty of
Geography, Department of
Graduate
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Eom, Junho. "Investigation of physiological and behavioral alarm responses in larval white sturgeon (Acipenser transmontanus)." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58203.

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White sturgeon populations in North America have dramatically decreased because of the commercial demand for caviar in the past and anthropogenic activities in the present. To conserve white sturgeon, recovery planning is required to ensure that the fish are self-sustaining through natural reproduction. However, little is known about many important aspects of white sturgeon biology, including their ability to detect and respond to alarm cues, the goal of this thesis. My results show that larval white sturgeon possess epidermal club cells, which in other fish are known to contain alarm cues. I investigated the effect of exposure to whole body extracts (WBE) of conspecifics (which contain the epidermal cells) on olfaction, through the use of electro-olfactogram (EOG), and investigated the effect of WBE exposure on behavioural responses and whole body cortisol levels in ~20 day post hatch white sturgeon larvae. The fish larvae showed alarm behaviors, such as avoidance, dashing, and freezing when exposed to WBE. In WBE treatment, the fish also increased whole body cortisol levels that are known as an indicator of stress. This thesis not only provides information on fundamental aspects of white sturgeon biology, but also may help fisheries management to understand how alarm substances are perceived in hatchery-reared naïve white sturgeon larvae.
Science, Faculty of
Zoology, Department of
Graduate
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Baker, Daniel William. "Physiological responses associated with aquatic hypercarbia in the CO₂-tolerant white sturgeon, Acipenser transmontanus." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/30449.

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Through investigations conducted at the organismal, tissue and cellular levels, this thesis provides clear evidence that the white sturgeon, Acipenser transmontanus, is among the most CO₂ tolerant of all fishes investigated to date. During moderate increases in water CO₂ tension (PCO₂) (≤ 15 mm Hg PCO₂, hypercarbia), white sturgeon exhibited changes in gill morphology and restored blood pH (pHe) through net HCO₃⁻/Cl⁻, a process observed in most fishes (Chapter 3). At CO₂ tensions lethal to other fishes (≥ 22.5 mm Hg PCO₂), white sturgeon completely protected intracellular pH (pHi) of the heart, liver, brain and white muscle (termed preferential pHi regulation), despite a large reduction in pHe (up to 1 pH unit) (Chapter 3, 4). Tissue pHi regulation was activated in heart within minutes of the onset of hypercarbia (measured via NMR, Chapter 5), and completely protected pHi in this tissue even during exposure to potentially lethal CO₂ levels (i.e., 90 mm Hg PCO₂). In hearts examined in situ, maximum cardiac performance was well defended and associated with partial pHi compensation in ventricles (which exhibited only ~40% of predicted acidosis). Preferential pHi regulation was not associated with large increases in metabolic costs, as during exposure to severe hypercarbia (~45 mm Hg PCO₂), heart [ATP] and [CrP] had recovered to pre-exposure levels within 90 min, and whole animal was decreased (30%) when pHi was completely protected. Preferential pHi regulation of this magnitude and rapidity has not been documented before in any vertebrate in response to hypercarbia and represents a novel pattern of acid-base regulation among fishes. White sturgeon represent the first exclusively water-breathing fish to exhibit preferential pHi regulation during hypercarbia. Furthermore, white sturgeon are the most basal vertebrate to demonstrate complete pHi protection during severe pHe depression. As sturgeon may retain ancestral characteristics, I propose that preferential pHi regulation is the basis for enhanced CO₂ tolerance in other tolerant Osteichthyan fishes, and first arose in association with ionoregulatory and respiratory challenges experienced during freshwater invasion in the vertebrate lineage.
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Whitlock, Rebecca Eleanor. "Applying Bayesian mark-recapture and decision analysis methods to evaluate fisheries management options for Fraser River white sturgeon." Thesis, Imperial College London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.542935.

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McAdam, Donald Steven Osborne. "Diagnosing causes of white sturgeon (Acipenser transmontanus) recruitment failure and the importance of substrate condition to yolksac larvae survival." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43301.

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White sturgeon are a conservation concern throughout their range, and three populations in Canada are experiencing nearly zero recruitment. While the presence of large dams on the Nechako, upper Columbia and Kootenay rivers suggests a causal relationship between flow regulation and recruitment failure, persistent uncertainty regarding the species’ biology and its interaction with anthropogenic habitat change limits the understanding of the causal mechanisms of recruitment failure. Recruitment failure causation in the Nechako and upper Columbia rivers was evaluated by comparing hindcasted recruitment with historical environmental changes. For the Nechako River population, recruitment failure coincided with substrate changes at a known spawning site; these changes were identified based on air photos and changes in river bed elevation. Evaluation of the upper Columbia River population considered the effects of multiple dams and other anthropogenic impacts, as well as the effects of sturgeon aging error and population structure. Eleven recruitment failure hypotheses were evaluated based on fifteen criteria, including stock specific temporal and spatial patterns of recruitment decline. Estimated timing of stock-specific recruitment declines was also compared with reach and watershed scale environmental changes and site-specific habitat changes. For both analyses, substrate change at spawning sites was identified as the likely cause of recruitment failure. Embryos and yolksac larvae are expected to be the primary life stages affected in both cases. Laboratory and field enclosure studies assessed the effects of substrate on drift, hiding and survival of yolksac larvae. Contrary to many prior investigations, interstitial hiding was the predominant behaviour in laboratory studies in the presence of suitable interstitial habitat, and both drift and predation by sculpins (Cottus spp.) increased when interstitial habitat was unavailable. Rapid and sustained hiding by yolksac larvae and increased survival all suggest that hiding predominantly occurs in the vicinity of spawning habitat. Collectively my results indicate that recruitment failure results from increased early life history mortality in response to substrate changes at spawning sites. Increased survival of yolksac larvae in response to gravel augmentation in field studies suggests that larger-scale substrate restoration at spawning sites provides a habitat based approach for recruitment restoration.
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Talbott, Mariah Jane. "Determining morphological and biochemical parameters associated with ovarian follicular atresia and caviar quality and yield in cultured white sturgeon (Acipenser transmontanus)." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/talbott/TalbottM0510.pdf.

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Harvesting sturgeon Acipenseridae when the ovarian follicles have the appropriate firmness and size is important for the caviar industry in order to produce a consistently uniform product and maximize caviar yield. Therefore, it is beneficial for the caviar industry to detect fish with atretic ovarian follicles prior to harvest, which can cause a decrease in caviar grade or complete loss of the product and to harvest fish at the correct stage of ovarian maturity to produce the highest quality and yield of caviar possible. The objectives of this study were to find a parameter that can detect early signs of ovarian follicular atresia by measuring blood plasma concentrations of sex steroids and determine if correlations exist among plasma sex steroid concentrations, morphological characteristics, and caviar yield and quality. To achieve the first objective, blood and ovarian follicles were collected repeatedly from 15 fish prior to and after inducing follicular atresia. Plasma testosterone (T) was the best indicator of the onset of atresia. Logistic regression models were used to illustrate how a threshold value of T can be determined to decrease the probability of harvesting white sturgeon with atretic ovaries. To achieve the second objective, biological samples (blood, ovarian follicles) and morphological measurements were collected from white sturgeon at caviar harvest (n = 20 per month) for five months. Analyses of parameters associated with caviar quality were limited because 92% of fish produced the same quality of caviar. Plasma E2 was correlated with caviar yield, caviar yield as a percent of body weight, and gonadosomatic index (GSI), whereas T was not correlated with either caviar yield or caviar yield as a percent of body weight. Ovarian fat varied greatly among individuals. Consequently, the ovarian stage associated with caviar yield could not be determined by measuring morphological parameters indicative of ovarian maturity. Post-hoc analyses were conducted to determine if parameters differed among ovarian fat categories. In the future, this study may benefit sturgeon conservation propagation programs by improving techniques for detection of ovarian atresia and offering a less-invasive method for estimating fecundity by utilizing the correlation between plasma E2 and GSI.
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Veinott, G. "Elemental concentrations in the fin rays of white sturgeon, Acipenser transmontanus, by laser ablation sampling-inductively coupled plasma-mass spectrometry (LAS-ICP-MS)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq40492.pdf.

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Books on the topic "White sturgeon White sturgeon"

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Echols, James C. Review of Fraser River white sturgeon (Acipenser transmontanus). Vancouver, B.C: Dept. of Fisheries and Oceans, 1995.

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Echols, James C. Review of Fraser River white sturgeon (Acipenser transmontanus). Vancouver, B.C: Dept. of Fisheries and Oceans, 1995.

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Conner, Bud. Great white sturgeon angling. Portland, Or: F. Amato, 1996.

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Fickeisen, Duane H. White sturgeon bibliography: Final report. Portland, Or: Bonneville Power Administration, Division of Fish and Wildlife, 1986.

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DeVore, John. Lower Columbia River white sturgeon current stock status and management implications. Olympia, WA: Washington State Dept. of Fish and Wildlife, Fish Program, Salmon and Steelhead Division, 1999.

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Brannon, E. L. Movements of white sturgeon in Lake Roosevelt : final report 1988-1991. Portland, OR: The Division, 1992.

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Marcuson, Patrick E. Kootenai River white sturgeon investigations: Annual report, 1993. Portland, Or: The Division, 1994.

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Apperson, Kimberly A. Kootenai River white sturgeon investigations and experimental culture. Portland, Or: The Division, 1991.

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Paragamian, Vaughn L. Kootenai River white sturgeon investigations: Annual progress report. Portland, Or: Bonneville Power Administration, 1995.

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Brannon, E. L. Columbia River white sturgeon genetics and early life history: Population segregation and juvenile feeding bahavior ; final report. Portland, OR: Bonneville Power Administration, Division of Fish and Wildlife, 1988.

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Book chapters on the topic "White sturgeon White sturgeon"

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Cherr, Gary N., and Wallis H. Clark. "Induction of the Acrosomal Reaction in Sperm from the White Sturgeon, Acipenser Transmontanus." In The Molecular and Cellular Biology of Fertilization, 235–49. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2255-9_14.

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De Riu, N., S. S. O. Hung, and G. Moniello. "White Sturgeon (Acipenser transmontanus) Optimum Feeding Rates at Weeks 6 and 10 After Initiation of Feeding." In Veterinary Science, 187–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23271-8_31.

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Chapman, Frank A., Susan L. Lucas, and Sean F. O'Keefe. "Effect of Sodium Potassium Phosphate (Carnal 2110) on Acceptability and Color of Hot Smoked White Sturgeon (Acipenser transmontanus)." In Flavor and Lipid Chemistry of Seafoods, 166–74. Washington, DC: American Chemical Society, 1997. http://dx.doi.org/10.1021/bk-1997-0674.ch015.

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"Biology, Management, and Protection of North American Sturgeon." In Biology, Management, and Protection of North American Sturgeon, edited by Xin Deng, Joel P. Van Eenennaam, and Serge I. Doroshov. American Fisheries Society, 2002. http://dx.doi.org/10.47886/9781888569360.ch19.

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<em>Abstract.</em>—Gametes of green sturgeon <em>Acipenser medirostris</em> (caught in the Klamath River, California) and farm-reared white sturgeon <em>A. transmontanus</em> were obtained using hormonal induction of ovulation and spermiation. The offspring of one female in each species were reared in the laboratory, to compare their development and growth. Green and white sturgeon embryos had similar rates of development and hatched after 169 h and 176 h, respectively, at incubation temperature 15.7 ± 0.2°C. Embryos of both species exhibited similar holoblastic development and passed through 36 stages characteristic of acipenserids. Green sturgeon fertilization and hatching rates were 41.2% and 28.0%, compared with 95.4% and 82.1% for the white sturgeon. Larval survival to 45 d (metamorphosis) was 93.3% in green and 92.1% in white sturgeon. Newly hatched green sturgeon (length 13.7 ± 0.4 mm, mean ± SD) were larger and less pigmented, compared with white sturgeon. They had large ovoid yolk sacs and did not exhibit pelagic behavior that was observed in white sturgeon. The onset of exogenous feeding in green sturgeon occurred at age 10–15 d and length 24.0 ± 0.5 mm, and metamorphosis was completed at age 45 d and length 74.4 ± 5.9 mm (rearing temperature 18.5 ± 0.2°C). Weight and length of green sturgeon larvae and juveniles were considerably greater than in white sturgeon at each sampling time, but the relative growth rate and weight-length relationship were similar in both species. This suggests an effect of larger egg size and maternal yolk supply on the growth of green sturgeon. We conclude that green sturgeon differs from the white sturgeon in their reproductive strategy and, potentially, reproductive habitat.
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"Biology, Management, and Protection of North American Sturgeon." In Biology, Management, and Protection of North American Sturgeon, edited by Susan C. Ireland, Paul J. Anders, and John T. Siple. American Fisheries Society, 2002. http://dx.doi.org/10.47886/9781888569360.ch17.

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<em>Abstract.</em>—The white sturgeon population <em>Acipenser transmontanus</em> in the Kootenai River was listed as endangered by the U.S. Fish and Wildlife Service (USFWS) in 1994 due to postglacial isolation and the virtual lack of recruitment since 1974. The Kootenai River White Sturgeon Conservation Aquaculture Program was initiated to preserve genetic variability, begin rebuilding natural age-class structure, and prevent extinction while measures are identified and implemented to restore natural recruitment. The program is part of a comprehensive recovery strategy detailed in the USFWS recovery plan for the Kootenai River population of white sturgeon. A breeding plan, including culture methods to minimize potential detrimental effects of conventional stocking programs, has been implemented to guide recovery, population management, and the systematic collection and spawning of wild adults before they are lost from the wild breeding population. Between 1990 and 2000, 33 families were produced from the mating of 51 wild white sturgeon broodstock. Genetic analysis indicated that five mitochondrial control region length variants represented in the wild white sturgeon population were represented in similar frequencies in the wild white sturgeon broodstock. A total of 2,702 hatchery-reared white sturgeon were released into the Kootenai River between 1992 and 1999. White sturgeon juveniles approved for release had no diagnostic disease symptoms and less than or equal to 10% prevalence of endemic pathogens. A total of 398 hatchery-reared fish were recaptured in the wild (14.7% of 2,702 stocked; single recapture events) during the 1993–1999 sampling period. The Kootenai River Conservation Aquaculture Program is currently meeting its objectives of reducing the threat of population extinction by providing frequent year classes from native broodstock, representing inherent within-population genetic diversity in its broodstock and progeny, and minimizing the introduction of disease into the recipient wild population.
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"Anadromous Sturgeons: Habitats, Threats, and Management." In Anadromous Sturgeons: Habitats, Threats, and Management, edited by William A. Nelson, Colin D. Levings, and Andrew J. Paul. American Fisheries Society, 2007. http://dx.doi.org/10.47886/9781888569919.ch22.

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<em>Abstract</em>. — White sturgeon <em>Acipenser transmontanus</em> were once abundant in the lower Fraser River of British Columbia, but have been dramatically reduced by overfishing and habitat loss. Significant efforts have been put into collecting baseline abundance and demographic data over the past decade. However, much of the population biology is still unknown, thereby limiting the ability of managers to focus conservation efforts. For example, one of the pressing questions is the importance of slough habitats, which are used by young juveniles much more than older juveniles and adults. In the absence of direct estimates of birth and death rates, a valuable alternative is to infer these rates from data on population structure using demographic models. Here, we fit an age-based model for white sturgeon to the available length-frequency data from slough and river habitats. Our analysis of the parameterized model indicates that the white sturgeon population in the lower Fraser River was declining through the 1980s and into the 1990s. We estimate a growth rate in the range of λ = 0.90 to λ = 0.96, which corresponds to a 4–10% decrease in the population each year. This estimate agrees with an independent estimate of λ = 0.91 derived using only catch-per-unit-effort data on juvenile white sturgeon from a slough habitat. Sensitivity analysis of the fitted population model reveals that juvenile survival has the largest influence on population growth. Thus, we infer that improving juvenile survival in the slough habitats is key to conserving this white sturgeon population. We feel that observational and experimental studies that focus on the survival of young juveniles will have the largest impact on our understanding of white sturgeon population biology.
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"Biology, Management, and Protection of North American Sturgeon." In Biology, Management, and Protection of North American Sturgeon, edited by Paul J. Anders, Diana L. Richards, and Madison S. Powell. American Fisheries Society, 2002. http://dx.doi.org/10.47886/9781888569360.ch6.

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<em>Abstract.</em>—The Kootenai River ecosystem in Idaho, Montana and British Columbia, Canada has been altered and degraded during the past 75 years. By the mid-1960s, phosphorus concentrations increased 15-fold, and nitrogen doubled from baseline conditions in the Kootenai River due to municipal and industrial development. Pollution abatement beginning in the late 1960s, and subsequent impoundment of the Kootenai River (Libby Dam 1972) reversed this culturally eutrophic condition. By the mid-1990s the Kootenai River was classified as ultraoligotrophic, as it remains today. Reverberating trophic responses to cultural denutrification were temporally correlated with the collapse of the functional Kootenai River ecosystem and its endemic white sturgeon <em>Acipenser transmontanus</em> population. Natural recruitment of white sturgeon in the Kootenai River has been virtually absent during the past 30 years, with several exceptions. In response to consistent natural recruitment failure, the Kootenai River white sturgeon population was listed as endangered on September 6, 1994, under the U.S. Endangered Species Act. Depressed biological productivity, alteration of spawning and rearing habitats, fish species abundance changes, altered predator–prey dynamics, and consistent white sturgeon recruitment failure constituted biological (ecological) responses to Kootenai River Basin development. We propose an integrated hypothesis to explain natural recruitment failure in the Kootenai River white sturgeon population. This hypothesis suggests that, during some years, natural recruitment failure may have been caused by female stock limitation. In other years (those lacking female stock-limitation), we propose that recruitment failure was due to one or more postspawning early life mortality factors.
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"Anadromous Sturgeons: Habitats, Threats, and Management." In Anadromous Sturgeons: Habitats, Threats, and Management, edited by Patrick A. Nealson and Harold M. Brundage. American Fisheries Society, 2007. http://dx.doi.org/10.47886/9781888569919.ch24.

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<em>Abstract.</em>—As part of an assessment of available remote sensing technologies for monitoring shortnose sturgeon <em>Acipenser brevirostrum</em>, field evaluations of a split-beam hydroacoustic monitoring system were conducted on the Delaware River in December 2002. The survey area selected for evaluation of the system was a section of the river near Bordentown, New Jersey, where adult shortnose sturgeon are known to aggregate during the winter months. Hydroacoustic measurements were collected on eight adult shortnose sturgeon captured in gill nets on December 4–6, 2002 by passing over these netted fish with a 200-kHz split-beam hydroacoustic system sampling a downlooking 15° transducer. The netted sturgeon were recovered following the acoustic sampling, physically measured, and released. The primary objective of this comparison was to determine if shortnose sturgeon could be detected by a hydroacoustic system, given their backscattering characteristics and general close proximity to the bottom. A secondary study objective evaluated shortnose sturgeon acoustic attributes relative to those of other coexisting fish species to assess if sturgeon exhibited any unique characteristics that might be used to distinguish them. The 2002 feasibility assessment determined that shortnose sturgeon could be detected in close proximity to the bottom by a scientific split-beam hydroacoustic system sampling at a relatively narrow (0.2 ms) broadcast pulse width. A netted sturgeon resting directly on the bottom was resolved by the acoustic system. Acoustic measurements of a tungsten carbide sphere determined that the target could be detected to within 12 cm of the substrate. The eight netted sturgeon returned mean target strength (TS) estimates of –26.5 decibels (dB), well above –80 dB ambient background noise levels. Relative to white sucker <em>Catostomus commersonii</em>, the other captured fish species, shortnose sturgeon differed in two measured acoustic parameters, mean fish TS, and distance from the bottom. Shortnose sturgeon were observed to return greater mean TS values (increased acoustic backscatter) and to be generally more associated with the bottom than the other evaluated fish species. Given the limited data set, these observations are only qualitative in nature, but indicate that shortnose sturgeon can be detected using split-beam echo sounding systems and may exhibit some unique acoustic characteristics allowing their differentiation from other fish species. Comparisons of shortnose sturgeon mean TS and total length determined that the attributes were positively correlated. Sturgeon mean TS measured during the experiments was greater than predicted for fish of equivalent length by the empirical TS-length relationship published by Love (1977).
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"Biology, Management, and Protection of North American Sturgeon." In Biology, Management, and Protection of North American Sturgeon, edited by Timothy G. Cochnauer. American Fisheries Society, 2002. http://dx.doi.org/10.47886/9781888569360.ch7.

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<em>Abstract.</em>—White sturgeon <em>Acipenser transmontanus</em> in the Hells Canyon reach of the Snake River have been under sport catch-and-release regulations for almost thirty years. Three states, Idaho, Oregon, and Washington bound this river section, and each imposed catchand-release regulations in 1970s. Nez Perce Tribe tribal members can harvest sturgeon throughout the year in this Snake River section. The population structure at the initiation of catch-and-release regulations showed a deficit in the 92–183 cm (TL) length range as white sturgeon within this group were harvested before 1972. The population composition was 86% between 55 and 92 cm, 4% between 92 and 183 cm, and 10% greater than 183 cm. Information collected during 1982–85 and in 1998 shows increasing abundance in the mid-sized length-group (92–183 cm TL). Because of the positive response of this population to a reduction in legal sport harvest, there have been discussions regarding the elimination of catchand-release fishing. Because of the longevity of white sturgeon, it may take another 25–30 years for the older age-class segment (>183 cm TL) to show a response to catch and release. For the interim, I suggest that strong consideration be given for retaining the Hells Canyon population as a conservation research population. This designation would allow for better understanding of population dynamics for future managers, but still allow present activities of catch-and-release sport fishing and tribal harvest.
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"Propagated Fish in Resource Management." In Propagated Fish in Resource Management, edited by VAUGHN L. PARAGAMIAN and RAYMOND C. P. BEAMESDERFER. American Fisheries Society, 2004. http://dx.doi.org/10.47886/9781888569698.ch32.

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<em>Abstract.</em>—In 1994, the Kootenai River white sturgeon <em>Acipenser transmontanus </em>was listed in the United States as an endangered species. Under provisions of the Endangered Species Act, a recovery plan was prepared and included two main recovery measures: (1) mitigation of spring flows for spawning and early life rearing, and (2) implementation of a conservation aquaculture and breeding plan to prevent extinction and sustain year-classes. The hatchery program was controversial and intended as a short-term measure as the flow mitigation strategy for wild fish developed. It called for the release each year of up to 1,000 white sturgeon from each of 10–12 families. It was believed that the mitigation of spring flows from Libby Dam would rapidly bring about recovery. However, after 8 years of flow mitigation and intensive monitoring and evaluation, it became apparent that recovery needs were more complex. Flow releases were not at the expected magnitude and habitat issues became a significant concern because the spawning location of sturgeon did not appear suitable (silt and sand) for adequate survival of eggs and larvae. Recruitment of wild fish was extremely low, while survival of hatchery sturgeon was higher than expected. Hatchery fish soon became abundant out numbering juvenile wild sturgeon by about 400:1. Assessment of sturgeon demographics, with extinction risk models, provided evidence that the wild population would be extinct within three decades and the population would be comprised almost exclusively of hatchery fish. Population projections described a significant near-term bottleneck in spawner numbers as the wild population diminished but hatchery fish had not yet matured. Managers are faced with a contentious dilemma of elevating the importance of the hatchery program by taking a higher proportion of the remaining wild spawners, escalating the number of hatchery releases, which could result in increasing the risk of inbreeding depression, loss of genetic diversity, genetic swamping, disease magnification, long term domestication, and intraspecific competition with wild recruits, compromising recovery. However, without significant hatchery intervention, the population could become a museum piece with no management options to benefit anglers. There will be disagreements, but risks must be considered, and we propose some compromises that may ease the intrusion of hatchery fish and provide management options.
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Conference papers on the topic "White sturgeon White sturgeon"

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Eriksen, Karl, Alan Coburn, Amanda Cox, and Chris Thornton. "The Use of Physical Modeling to Design Kootenai River White Sturgeon Spawning Habitat." In World Environmental and Water Resources Congress 2008. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40976(316)227.

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Reports on the topic "White sturgeon White sturgeon"

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Paragamian, Vaughn L., Gretchen L. Kruse, and Virginia Wakkinen. Kootenai River White Sturgeon Investigations : White Sturgeon Spawning and Recruitment Evaluation, 1998 Annual Report. Office of Scientific and Technical Information (OSTI), March 2001. http://dx.doi.org/10.2172/782929.

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Paragamian, Vaughn L., Gretchen L. Kruse, and Virginia Wakkinen. Kootenai River White Sturgeon Investigations; White Sturgeon Spawning and Recruitment Evaluation, 1999 Annual Report. Office of Scientific and Technical Information (OSTI), November 2001. http://dx.doi.org/10.2172/799229.

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Paragamian, Vaughn L. Kootenai River White Sturgeon Investigations; White Sturgeon Spawning and Recruitment Evaluation, 1996 Annual Report. Office of Scientific and Technical Information (OSTI), September 1997. http://dx.doi.org/10.2172/663506.

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Rust, Pete, and Virginia Wakkinen. Kootenai River White Sturgeon Investigations; White Sturgeon Spawning and Recruitment Evaluation, 2003-2004 Annual Report. Office of Scientific and Technical Information (OSTI), June 2005. http://dx.doi.org/10.2172/901200.

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Rust, Pete, and Virginia Wakkinen. Kootenai River White Sturgeon Investigations; White Sturgeon Spawning and Recruitment Evaluation, 2004-2005 Annual Report. Office of Scientific and Technical Information (OSTI), May 2006. http://dx.doi.org/10.2172/901208.

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Bellgraph, Brian J., William A. Perkins, Marshall C. Richmond, John A. Serkowski, Samuel F. Harding, and Ryan A. Harnish. Lake Roosevelt White Sturgeon Modeling Support. Office of Scientific and Technical Information (OSTI), November 2016. http://dx.doi.org/10.2172/1494303.

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Fickeisen, Duane H. White Sturgeon Bibliography, 1985 Final Report. Office of Scientific and Technical Information (OSTI), March 1986. http://dx.doi.org/10.2172/5684144.

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Marcuson, Patrick E. Kootenai River White Sturgeon Investigations, 1993 Annual Report. Office of Scientific and Technical Information (OSTI), May 1994. http://dx.doi.org/10.2172/878244.

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Apperson, K. A., and P. J. Anders. Kootenai River white sturgeon investigations and experimental culture. Test accounts, June 1990. http://dx.doi.org/10.2172/6075931.

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Marcuson, Patrick E., Virginia Wakkinen, and Gretchen Kruse-Malle. Kootenai River White Sturgeon Investigation, 1994 Annual Report. Office of Scientific and Technical Information (OSTI), July 1995. http://dx.doi.org/10.2172/245637.

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