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... The Sox9 gene of Acipenser sturio, one of the most primitive vertebrates, was analyzed. No sex-specific differences were observed. Sturgeon Sox9 consists of three exons and two introns with completely conserved exon-intron boundaries showing high levels of homology to other vertebrate Sox9 sequences, especially in the N-terminus region containing the HMG box. We found strong evidence for negative ...
... Recent molecular data on the maternally inherited mitochondrial (mt) DNA have challenged the traditional view that the now extinct Baltic sturgeon population belonged to the European sturgeon Acipenser sturio. Instead, there is evidence that American sea sturgeon Acipenser oxyrinchus historically immigrated into the Baltic Sea. In this study, we test the hypothesis that A. oxyrinchus introgressed ...
... Green and European Atlantic sturgeon are listed as a vulnerable and a critically endangered species, respectively. These anadromous species inhabit different continents but have many similar life history traits and demographic characteristics, including wide geographic ranges, similar migratory and foraging behavior, age and size structures of reproductive stocks and, historically, diverse populat ...
... A highly debated problem in Acipenseridae taxonomy is whether Acipenser oxyrinchus (North American Atlantic sturgeon) and A. sturio (European Atlantic sturgeon) are true species: a detailed comparison of their karyotypes could provide relevant information. Here we describe for the first time the karyotype of A. oxyrinchus (2n = 121 ± 3), and its features, among which the constitutive heterochromat ...
Acipenser oxyrinchus; drainage; juveniles; migratory behavior; radio transmitters; rearing; rivers; sturgeon; water temperature; Poland
Abstract:
... The movements of individual juvenile sturgeon, Acipenser oxyrinchus Mitchill, during their first stage of downstream migration were observed in the Drawa River, Poland. Two groups of 10 sturgeon each (9 months old, reared in closed recirculation systems) were tagged with internal radio-transmitters. The first group of sturgeon (119-184 g) were tagged with Holohill BD-2N transmitters (weight 0.43 g ...
Acipenser gueldenstaedtii; Acipenser oxyrinchus; adults; aquaculture; demography; extinction; fecundity; fisheries; issues and policy; juveniles; life history; mortality; risk; rivers; simulation models; spawning; sturgeon; viability; water pollution; Danube River
Abstract:
... Populations of six sturgeon species in the Danube River (beluga, Russian sturgeon, stellate sturgeon, sterlet, ship sturgeon and Atlantic sturgeon) have experienced severe decline during the last several decades, mostly due to the unsustainable fishery, river fragmentation and water pollution. Present lack of knowledge on basic sturgeon demography, life history and relative effects of different ne ...
... This study presents the parasitic relationship between the leech, Caspiobdella fadejewi, and the juvenile Atlantic sturgeon, Acipenser oxyrinchus. The aim was to determine leech invasion intensity and extensity and describe parasite feeding location preferences on the ventral side of the snout and gill cavities. The prevalence of C. fadejewi occurrence was 37.3%, at an intensity of one to eight le ...
... The Atlantic sturgeon, Acipenser oxyrinchus oxyrinchus Mitchill, has been considered to be an extinct species in the Baltic Sea for many years. A program to restore it to the Vistula basin was initiated in 2006 using cultured fish. This paper presents data regarding the distribution of juvenile Atlantic sturgeon released into the Drwęca and Wisłoka rivers (Vistula drainage). Tag returns from juven ...
... Atlantic sturgeon, Acipenser oxyrinchus Mitchill was once one of the largest European freshwater fish, and it was common in the Vistula River drainage. Since 2006, juvenile Atlantic sturgeon obtained by artificially reproducing wild spawners caught in the St. John River in Canada have been stocked into several rivers in Poland. The current study to assess the feeding of Atlantic sturgeon in the Dr ...
Acipenser oxyrinchus; ammonia; animal growth; body weight; excretion; feed conversion; fish; juveniles; nutritive value; oxygen; oxygen consumption; stocking rate; water temperature; France
Abstract:
... The impact of stocking density on the growth, feed conversion, oxygen consumption, and ammonia excretion of juvenile Atlantic sturgeon (Acipenser oxyrinchus Mitchill) was studied. Three initial stocking densities were used in the experiment: 1.27, 2.49, and 3.80 kg m⁻². The length of the experiment was 64 days. The mean water temperature was 15.0°C. The fish were fed commercial feed Nutra T 1.9 (T ...
Acipenser oxyrinchus; body length; gravel; habitat preferences; habitats; juveniles; radio telemetry; rivers; sand; sturgeon; tree trunk; Poland
Abstract:
... The aim of conducting the study was to describe the habitats and the movements of juvenile Atlantic sturgeon, Acipenser oxyrinchus oxyrinchus Mitchill, in the Wisłoka River. Radio telemetry methods were used to identify migration rates and the sites where sturgeon stopped during the day. In the 2009-2010 period, 25 juvenile sturgeon equiped with radio telemetry transmitters were released into the ...
... Historically the Chesapeake Bay supported a large population of Atlantic sturgeon Acipenser oxyrinchus , but loss of suitable spawning habitat and overfishing coincided with dramatic in-system declines throughout the 20th century. Atlantic sturgeon harvest moratoriums were implemented in 1974 for Virginia waters and were expanded coastwide in 1998. In 1997, researchers became aware that commercial ...
... One of the largest impediments to the conservation of freshwater mussels is the absence of host-fish data. Suitable hosts must be present in sufficient numbers and occur at the appropriate time for successful mussel recruitment. Habitat degradation and fragmentation caused by dams and other anthropogenic alterations may reduce host availability. Host data are lacking for the federally threatened P ...
... Due to overfishing and habitat alteration, the anadromous Atlantic sturgeon Acipenser oxyrinchus oxyrinchus is severely depleted across its historic range. The James and York rivers in Virginia are the two rivers comprising the Chesapeake Bay distinct population segment, where Atlantic sturgeon reproduction has been confirmed. It is widely recognized that Atlantic sturgeon spawn in the spring thro ...
Acipenser brevirostrum; Acipenser oxyrinchus; Alosa pseudoharengus; Microgadus tomcod; Morone saxatilis; diadromous fish; ecological restoration; ecosystems; freshwater; geographic information systems; habitat preferences; habitats; life history; rearing; rivers; spawning; surveys; watersheds; Maine; New England region
Abstract:
... The Penobscot River basin, covering approximately 22,265 km², is the largest river wholly within Maine and the second largest river system in New England. The Penobscot River Restoration Project (PRRP) is a multimilliondollar endeavor that aims to restore native sea-run fish through the removal of two main-stem dams and improved fish passage at a third dam on the Penobscot River. We used geographi ...
... Threats such as habitat loss, invasive species, and overexploitation cause species extinctions; however, stochastic processes can accelerate extinction rates as census sizes decline. Using molecular and ecological data, we explored the influence of these processes on the demography of a candidate species under the U.S. Endangered Species Act—the Atlantic sturgeon Acipenser oxyrinchus oxyrinchus . ...
... In 2012, all populations of Atlantic sturgeon Acipenser oxyrinchus oxyrinchus were listed as either threatened or endangered under the U.S. Endangered Species Act. During 2007–2010, researchers documented 31 carcasses of adult Atlantic sturgeon in the tidal freshwater portion of the James River, Virginia. Twenty-six of the carcasses had gashes from vessel propellers, and the remaining five carcass ...
Acipenser oxyrinchus; adults; anthropogenic activities; basins; bycatch; development projects; endangered species; genetic heterogeneity; hosts; loci; microsatellite repeats; migratory behavior; mitochondrial DNA; rivers; sequence analysis; spawning; sturgeon; summer; water power; Georgia; Hudson River; Maine; New Brunswick; New York; Quebec; Saint Lawrence River
Abstract:
... Five distinct population segments of Atlantic sturgeon Acipenser oxyrinchus were recently listed (April 2012) as endangered or threatened under the U.S. Endangered Species Act. Atlantic sturgeon are anadromous, spawning occurs in rivers from the St. Lawrence River, Quebec, to the Satilla River, Georgia, and subadults and adults undertake extensive coastal migrations. Bycatch of Atlantic sturgeon i ...
... Invasive surgical procedures on sturgeon (family Acipenseridae) are sometimes conducted without anesthesia. We examined plasma cortisol concentrations in Atlantic Sturgeon Acipenser oxyrinchus exposed to the anesthetic MS-222 (tricaine methanesulfonate), electronarcosis, or no anesthetic 1 and 24 h after a small incision mimicking an invasive procedure (tag implantation or laparoscopy). We also de ...
Acipenser oxyrinchus; acoustics; basins; blood; blood glucose; bycatch; cortisol; fish; fish behavior; government agencies; habitat destruction; invertebrates; littoral zone; overfishing; summer; survival rate; telemetry; Nova Scotia; United States
Abstract:
... Atlantic Sturgeon Acipenser oxyrinchus aggregate in Minas Basin in the inner Bay of Fundy, Nova Scotia, during summer, presumably to feed on abundant intertidal invertebrates. The Atlantic Sturgeon aggregation is composed of multiple stocks from Canada and the USA. Government agencies from both nations have recently recognized Atlantic Sturgeon as threatened or endangered due to overfishing and ha ...
... Acoustic telemetry has become a leading tool for monitoring the movements of and habitat use by many sturgeon species worldwide; however, procedures for internal tagging of small juvenile sturgeon (<55 cm TL) are lacking. We examined effects of implantation technique on growth, tag retention, and survival of juvenile (<55 cm) Shortnose Sturgeon Acipenser brevirostrum and Atlantic Sturgeon A. oxyri ...
Acipenser oxyrinchus; acoustics; brackish water; data analysis; endangered species; fisheries; fisheries management; freshwater; habitats; jumping; models; rivers; saline water; sturgeon; surveys; telemetry; video cameras; North Carolina; South Carolina
Abstract:
... Technological advances represent opportunities to enhance and supplement traditional fisheries sampling approaches. One example with growing importance for fisheries research is hydroacoustic technologies such as side-scan sonar. Advantages of side-scan sonar over traditional techniques include the ability to sample large areas efficiently and the potential to survey fish without physical handling ...
... The results of the works on the international project for the Baltic sturgeon restoration in the basin of the Neman River are considered. The mutual goal of the project is the restoration of the Baltic sturgeon population in its whole former area in the Baltic Sea. Successful works on the restoration of the Baltic sturgeon population are conducted in the Oder and the Vistula basins. The stockings ...
Acipenser oxyrinchus; Artemia; Perla; animal growth; body weight; diet; feeds; fish; fish feeding; larvae; France; Italy; Poland
Abstract:
... The aim of this experiment was to assess the impact live and formulated diets had on the growth and survival of larval Atlantic sturgeon, Acipenser oxyrinchus Mitchill. In the first experiment, the results of feeding the fish decapsulated (group D) and undecapsulated (group ND) Artemia sp. cysts were compared. Increases in the body weights and lengths of the fish fed decapsulated and undecapsulate ...
... Physical processes in the coastal Mid-Atlantic create a complex and dynamic seascape. Understanding how coastal fishes respond to this complexity has been a major motivation in establishing coastal biotelemetry arrays. Most coastal arrays maximize the probability offish detection by positioning hydrophones near geophysical bottlenecks. The development of a real-time ocean observatory allows for sy ...
... On February 6, 2012, the National Marine Fisheries Service listed five distinct population segments (DPSs) of Atlantic Sturgeon Acipenser oxyrinchus encompassing their entire U.S. range, including one DPS in Chesapeake Bay, as either threatened or endangered under the Endangered Species Act. Designation of DPSs is a management tool that identifies significant, discrete, geographically defined port ...
... Understanding mortality rates and movement patterns across a species’ distribution can provide key insight necessary for developing effective conservation, recovery, and management plans. We directly estimated site fidelity and natural mortality rates for the threatened Gulf sturgeon (Acipenser oxyrinchus desotoi) across a large portion of their range in the northern Gulf of Mexico using acoustic ...
... The National Marine Fisheries Service listed five distinct population segments of Atlantic Sturgeon Acipenser oxyrinchus as threatened and endangered under the Endangered Species Act on February 6, 2012. At that time, the only known spawning population of sturgeon in the Chesapeake Bay was in the James River. The goal of this research was to determine whether reproduction was also occurring in the ...
Acipenser oxyrinchus; genetic variation; genotype; inbreeding; juveniles; life history; microsatellite repeats; mitochondrial DNA; population size; rivers; spawning; Delaware River; Hudson River; New York
Abstract:
... Juvenile Atlantic sturgeon (Acipenser oxyrhinchus oxyrhinchus) forming aggregations at coastal sites in the mid-Atlantic Bight were subjected to a mixed stock analysis (MSA) and individual-based assignment using twelve microsatellite loci. We confirmed earlier findings from an analysis of mitochondrial DNA that three river spawning populations (Hudson, James and Delaware Rivers) are the primary so ...
Andréia M. Porcari; Gabriel D. Fernandes; Katia Roberta A. Belaz; Nicolas V. Schwab; Vanessa G. Santos; Rosana M. Alberici; Varvara A. Gromova; Marcos N. Eberlin; Albert T. Lebedev; Alessandra Tata
Acipenser oxyrinchus; Acipenser sturio; ambient temperature; desorption; fish roe; hydrolysis; lipid composition; matrix-assisted laser desorption-ionization mass spectrometry; monitoring; oxidation; pasteurization; phospholipids; spectrometers; storage time; tandem mass spectrometry; triacylglycerols
Abstract:
... The lipid profile of Sturgeon roe (caviar) was monitored by matrix assisted laser desorption/ionization mass spectrometry (MALDI(+)-MS), thermal imprinting easy ambient sonic-spray ionization mass spectrometry (TI-EASI(+)-MS) and electrospray mass spectrometry (ESI(+)-MS). Freshly salted and commercially salted pasteurized caviar samples of Atlantic sturgeon (Acipenser sturio) were stored either a ...
Acipenser oxyrinchus; Endangered Species Act of 1973; biomass; carrying capacity; case studies; ecosystems; fisheries; fisheries law; fisheries management; habitat conservation; habitat destruction; habitats; population dynamics; population size; rivers; spawning; threatened species; United States
Abstract:
... Conservation efforts under regulatory programs such as the U.S. Endangered Species Act and Magnuson-Stevens Fisheries Conservation and Management Act seek to restore species in decline to a level where the populations are no longer in jeopardy. Key to designing effective conservation plans for the more than 2,500 species currently managed by these two U.S. programs is the establishment of realisti ...
... In this review, stock identification methods used, resulting stock numbers and boundaries, and assessment and management context were explored for all 25 species managed by the Atlantic States Marine Fisheries Commission (ASMFC). This included invertebrates and vertebrates distributed between Maine and Florida, with a few species ranging across all these states and some ranging into the Gulf of Me ...
... We have developed a multiplex assay covering 16 microsatellite loci, amplified in four polymerase chain reaction (PCR) assays, and loaded on the ABI DNA Analyzer in two separate panels. The assay was tested on 603 individuals originating from wild populations and hatchery stocks of Atlantic sturgeon. The assay was also tested on 12 individuals of European sturgeon and appeared to be almost equally ...
endangered species; morphometry; managers; rivers; anadromous fish; Acipenser oxyrinchus; data collection; indigenous species; drainage; adults; Louisiana; Gulf of Mexico; Florida
Abstract:
... The Gulf sturgeon, Acipenser oxyrinchus desotoi Mitchill 1815, is an anadromous fish native to the Gulf of Mexico (GOM). This threatened species ascend northern GOM rivers ranging from the Pearl River, Louisiana to the Suwannee River, Florida. The drainage fidelity seen within this species coupled with the complex migration patterns create many unknowns concerning the functionality between drainag ...
... Sturgeon aquaculture has increased considerably worldwide but little is known about their immunological development and competence in early life stages. Culture of larvae is one of the most critical stages in intensive sturgeon farming, often associated with high mortality rates. The objective of this study was to characterize the developmental morphology (light and transmission electron microscop ...
Acipenser oxyrinchus; Oxyrhynchus; Polyodontidae; aquacultural and fisheries equipment; electric field; endangered species; fisheries; foods; mortality; neodymium; praseodymium; sturgeon; United States
Abstract:
... Atlantic sturgeon (Acipenser oxyrhynchus) populations have been declared either endangered or threatened under the U.S. Endangered Species Act. Effective measures to repel sturgeon from fishing gear would be beneficial to both fish and fishers because they could reduce both fishery‐associated mortality and the need for seasonal and area closures of specific fisheries. Some chondrostean fishes (e.g ...
... The Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus Mitchill, 1815) is an anadromous sturgeon species, yet little is known with regard to its osmoregulatory ability and habitat use at early life stages. In order to examine whether salinity poses a physiological challenge to juvenile Atlantic sturgeon near the sizes where they may begin to move into saline habitats, growth and osmoregulatory abi ...
... An experimental release of 1192 hatchery‐reared, individually PIT tagged, 220 days old (296–337 mm TL) Gulf sturgeon, Acipenser oxyrinchus desotoi, was undertaken in 1992 in the Suwannee River, Florida. The original objectives of the 1992 release experiment were to: (1) evaluate survival rate of cultured Gulf sturgeon in the wild vs survival rate of their wild 1992 cohort counterparts, (2) determi ...
Acipenser brevirostrum; Acipenser oxyrinchus; DNA; adults; basins; coasts; extinction; habitat destruction; population dynamics; risk; spawning; summer; Canada; United States
Abstract:
... Sturgeon species worldwide have undergone population declines due to habitat alteration and overexploitation and many are listed by the International Union for Conservation of Nature (IUCN) and national agencies. Atlantic and shortnose sturgeon on the east coast of North America are listed as “endangered” or “threatened” over most of their ranges. It has been proposed, however, that IUCN risk cate ...
Danijela Popović; Hanna Panagiotopoulou; Mateusz Baca; Krzysztof Stefaniak; Paweł Mackiewicz; Daniel Makowiecki; Tim L. King; Jakub Gruchota; Piotr Weglenski; Anna Stankovic; Aristeidis Parmakelis
... AIM: Migrants of the Atlantic sturgeon, Acipenser oxyrinchus, from North America are thought to have founded the Baltic sturgeon population during the Little Ice Age around 1200 years ago, replacing the European sturgeon, Acipenser sturio. To test this hypothesis and to further elucidate the colonization of the Baltic Sea by A. oxyrinchus, we carried out DNA analyses of ancient and contemporary po ...
Acipenser oxyrinchus; rain; regression analysis; rivers; summer; water temperature; Gulf of Mexico; Mississippi
Abstract:
... Environmental cues that are associated with individual movement of threatened Gulf Sturgeon from upriver areas to nearshore and offshore winter feeding areas have been described throughout much of their range in the Gulf of Mexico. In this study, we focus on small‐scale movement of Gulf Sturgeon between summer ‘holding’ areas and the fall staging area in the Pascagoula River system (Mississippi, U ...
Acipenser oxyrinchus; adults; females; fisheries; growth models; juveniles; males; rivers; New Brunswick; Quebec; Saint Lawrence River
Abstract:
... As a long-lived and late-maturing species, Atlantic Sturgeon Acipenser oxyrinchus are susceptible to overharvest, which makes knowledge concerning their age and growth essential to sustainable management. The Saint John River, New Brunswick, and the St. Lawrence River, Quebec, support the two remaining commercial fisheries for Atlantic Sturgeon in North America; however, the relationship between a ...
Acipenser oxyrinchus; adults; anadromous fish; anesthesia; anesthetics; life history; males; researchers; rivers; spawning; surgery; telemetry; Virginia
Abstract:
... With advances in technology and demand for life history information, researchers are increasingly conducting invasive procedures on fish that require an anesthetic. This study examined the effectiveness of electronarcosis as a field anesthetic on Atlantic Sturgeon Acipenser oxyrinchus oxyrinchus during the spawning season in the James River, Virginia. Concerns about sampling Atlantic Sturgeon duri ...
Acipenser oxyrinchus; acoustics; habitat destruction; models; overfishing; population density; population dynamics; rivers; seawater; sturgeon; surveys; threatened species; North Carolina; South Carolina
Abstract:
... Sturgeons (Acipenseridae) are one of the most threatened taxa worldwide, including species in North Carolina and South Carolina. Populations of Atlantic Sturgeon Acipenser oxyrinchus in the Carolinas have been significantly reduced from historical levels by a combination of intense fishing and habitat loss. There is a need for estimates of current abundance, to describe status, and for estimates o ...
Acipenser oxyrinchus; acoustics; anadromous fish; developmental stages; eggs; habitat preferences; habitats; research planning; rivers; spawning; spring; telemetry; water temperature; North Carolina
Abstract:
... In 2012, the National Oceanic and Atmospheric Administration (NOAA) declared Atlantic Sturgeon Acipenser oxyrinchus oxyrinchus to be threatened or endangered throughout its range in U.S. waters. Restoration of the subspecies will require much new information, particularly on the location and timing of spawning. We used a combination of acoustic telemetry and sampling with anchored artificial subst ...
... We determined that the average gastrointestinal tract length of 8–11-month-old Gulf of Mexico Sturgeon Acipenser oxyrinchus desotoi , a subspecies of Atlantic Sturgeon A. oxyrinchus , was approximately 82% of its fork length. The time required for digesta to pass through the digestive tract was approximately 32 h. Defecation was initiated between 8 and 16 h after feeding. The main site for digesti ...
Acipenser oxyrinchus; aquariums; dredging; juveniles; laboratory techniques; locomotion; sediments; sturgeon; suspended sediment; swimming; total suspended solids; waterways; South Carolina
Abstract:
... Tested was the hypothesis that juvenile Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) would exhibit no response in short‐term survival or swimming performance when exposed to varying concentrations of suspended sediment simulating dredge plumes in waterways where this species may be impacted by dredging operations. Sediment collected from Savannah Harbor, South Carolina, USA was used to simu ...
fisheries management; endangered species; gillnets; habitat preferences; migratory behavior; anadromous fish; flounder; Acipenser oxyrinchus; trawl nets; surveys; habitats; Paralichthys dentatus; coasts; bycatch; population dynamics; adults; New York
Abstract:
... Population declines of Atlantic Sturgeon Acipenser oxyrinchus oxyrinchus prompted initial fisheries closures and an eventual endangered or threatened species listing across the U.S. portion of their range in 2012. Atlantic Sturgeon aggregations and migration routes along the coast of Long Island overlap with commercial fishing activities that may lead to incidental take in nondirected fisheries. T ...
Acipenser oxyrinchus; bycatch; coastal water; coasts; endangered species; estuaries; genetic techniques and protocols; microsatellite repeats; mitochondrial DNA; rivers; spawning; spring; sturgeon; viability; Delaware; Hudson River; New York
Abstract:
... Atlantic Sturgeon Acipenser oxyrinchus oxyrinchus was federally listed under the U.S. Endangered Species Act as five distinct population segments (DPS). Currently, at least 18 estuaries coastwide host spawning populations and the viability of these vary, requiring differing levels of protection. Subadults emigrate from their natal estuaries to marine waters where they are vulnerable to bycatch; on ...