First verified occurrence of the shortnose sturgeon (Acipenser brevirostrum) in the James River, Virginia
1
Citation
13
Reference
10
Related Paper
Citation Trend
Abstract:
The shortnose sturgeon (Acipenser brevirostrum) is an endangered species of fish that inhabits the continental slope of the Atlantic Ocean from New Brunswick, Canada, to Florida.This species has not been documented previously in the freshwater portion of any river of the Chesapeake Bay, except in the Potomac River.On 13 March 2016, a shortnose sturgeon was captured in the freshwater portion of the James River at river kilometer 48.The fish had a fork length of about 75 cm and was likely mature.Genetic analysis confirmed the fish was a shortnose sturgeon and was assigned to the Chesapeake Bay-Delaware population segment.Regardless of whether this shortnose sturgeon was part of a remnant Chesapeake Bay population or whether its capture there is an indicator of an expansion of range from the Delaware River by way of the Chesapeake and Delaware Canal, dedicated research is needed to determine the status of the shortnose sturgeon inhabiting the Chesapeake Bay.Sturgeon catches (n = 256) from 1981-1999 reported mainly by commercial fishermen and anglers in German, Polish, and Dutch coastal waters and tributaries were analysed. During the study period, 20 % of catches were reported from coastal waters and 65 % from rivers and estuaries of large river systems, including the Odra, Elbe, Rhine and Weser. The data indicate that, from 19811993, there was a major decline in the Atlantic sturgeon Acipenser sturio L., 1758, and an increase in the total catches of non-indigenous sturgeon species. The Siberian sturgeon Acipenser baerii Brandt, 1869, the Russian sturgeon Acipenser gueldenstaedtii Brandt & Ratzeberg, 1833, and various hybrids dominated. Occasional catches of the white sturgeon Acipenser transmontanus Richardson, 1836 and the sterlet Acipenser ruthenus L., 1758 were also reported. During the study period, significant changes in species composition and distribution of catches were observed. The predominance of non-indigenous sturgeon species is a result of the increasingly intensive sturgeon aquaculture activities in Germany, Poland, and the Netherlands. The most frequently reared species now dominate the catches. In addition to these escapees from fish farms, several intentional releases of sturgeons were reported. The results show that introduced exotic sturgeon species may thrive under certain natural conditions. Therefore, they may interfere with restoration efforts for the native A. sturio, competing for habitat and introducing diseases and hybridization.
Huso
Cite
Citations (14)
Huso
Beluga
Cite
Citations (15)
Cite
Citations (0)
Baltic sea
Cite
Citations (1)
At the work on the basis of empirical data on the number of generations 1959-1987of Beluga (Huso, hoso L), sturgeon (Acipenser gueldenstaedtii Brand), stellate sturgeon (Acipenser stellatus Pallas), the coefficient of yield to the fishey of young fishes, which were cultivated at the fishery plants of Russia, was calculated. You can see the analysis of scales of natural spawning of sturgeon. Determined the proportions of fish from natural and artificial origin: Beluga, Russian sturgeon, stellate sturgeon. This work shoes recommendations for conservation and restoration of sturgeon populations in the Caspian Sea.
Beluga
Huso
Cite
Citations (0)
KEGG
Yersinia ruckeri
Grass carp
Cite
Citations (22)
Cite
Citations (5)
The history and contemporary state of global aquaculture of sturgeons and paddlefish are reviewed. 5th part is devoted to sturgeon breeding in the basin of Black sea (without countries of former USSR reviewed earlier) аnd in the Middle East. Six species of sturgeon once migrated in the Danube River and Turkish rivers Yeşilırmak, Kızılirmak and Sakarya for spawning: anadromous beluga Huso huso, Russian sturgeon Acipenser gueldenstaedtii, stellate sturgeon A.stellatus, European sturgeon A. sturio and the river resident ship sturgeon A. nudiventris and sterlet A. ruthenus. Sturgeons had played an important role in the history Black sea fisheries, but due to overexploitation, followed by extensive river regulations and deterioration of water quality decrease in their populations has led most of them to the verge of extinction. During the 20th Century, world demand for sturgeon meat and caviar has inflated the economic value of sturgeons so Danube basin countries and Turkey develop commercial aquaculture and conservational programs. As result of protective measures the limited natural spawning of beluga, Russian and stellate sturgeons and sterlet is preserved in Danube. In Sakarya River last spawning population of stellate sturgeon exists. These species and Siberian sturgeon are important objects of commercial aquaculture in all countries of Black sea basin. The leaders of commercial sturgeon farming in this region are Bulgaria and Israel. The sturgeon aquaculture of Hungary and Turkey developed rapidly. Saudi Arabia and United Arab Emirates are important importers of caviar. Saudi Arabia is large consumer of caviar and UAE is one of main re-exporter of caviar. Both Arab countries develop own sturgeon aquaculture.
Huso
Beluga
Overexploitation
Cite
Citations (0)