Ural (Zhayik) River Spawning Grounds of the Sturgeon (Acipenseridae) in the Republic of Kazakhstan: Modern Situation

Шалгимбаева, Г. М.; Mugue, Nikolai; Isbekov, Kuanysh Baibulatovich; Volkov, Alexander N.; Микодина, Е. В.

doi:10.1134/s0032945222060273

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…Ural's spawning sites are in a constant state of flux due to natural hydrological variability, but there are now unmistakable signs of trouble [28,81,82]. Although information about the current condition of spawning areas in Russia is scarce, the sites spanning nearly 800 km of the river's lower reaches in Kazakhstan were recently surveyed [83]. The number of these sites has fluctuated only slightly over the past half century-from 63 sites in 1968 to 70 in 1986, 63 in 2004, and 68 in 2016.…”

Section: Habitatmentioning

confidence: 99%

“…Various methods have been employed since at least the mid-nineteenth century to constrain fishing in the Ural River and preserve its valuable sturgeon stocks [38,41]. Aware of the fragility and value of sturgeon, Russia and its predecessor and successor states issued multiple regulations governing the length of fishing seasons, the use of fishing gear, catch and size limits, the location of legal fishing areas, and eventually outright bans on fish-ing [19,41,83]. Although sturgeon fishing was legal across the Caspian basin during the Soviet era, restrictions were gradually tightened beginning in the early 1950s.…”

Section: Overfishingmentioning

confidence: 99%

“…Removing as much uncertainty as possible from the problem is the third strategy [169]. The uncertainties associated with insufficient information about the hydrology of the Ural River, IUU fishing, and the consequences of stocking are well known, as is the bottleneck imposed by inadequate environmental monitoring data [28,83,152,170,171]. The lack of fundamental knowledge about structural changes in populations of Ural sturgeon species due to anthropogenic and other pressures [143] also generates ambiguity.…”

Section: The Wicked Nature Of Re-establishing Sturgeon In the Ural Rivermentioning

confidence: 99%

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Re-Establishing Naturally Reproducing Sturgeon Populations in the Caspian Basin: A Wicked Problem in the Ural River

Pueppke,

Nurtazin,

Murzashev

et al. 2023

Water

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Although Eurasia’s Caspian basin once supported the world’s richest and most diverse complex of sturgeon species, recent human activities have decimated populations of these ecologically and economically important fish. All five anadromous Caspian sturgeon species are critically endangered, and the potamodromous sterlet is also threatened. The precipitous decline of these species is due to a combination of factors that includes illegal, unreported, and unregulated (IUU) fishing; destruction of feeding and spawning habitat; water pollution; and the environmental consequences of climate change. International efforts are currently underway to re-establish sustained naturally reproducing sturgeon populations in the basin. Here, we update and review the status of sturgeon in the Caspian Sea with emphasis on the northern basin and the inflowing Volga and Ural rivers. We then focus on efforts to restore sturgeon in the Ural, which originates in Russia and flows through Kazakhstan before entering the Caspian Sea. With nearly ideal hydrological conditions for sturgeon, the Ural is the basin’s sole remaining river that allows migrating sturgeon unimpeded access to potentially productive spawning grounds. The challenge of re-establishing sturgeon in the Ural River exhibits the classical characteristics of wicked problems: ambiguous definitions, changing assumptions and unanticipated consequences, tradeoffs and economic dependencies, an incomplete and contradictory knowledge base, and no straightforward pathway toward a final solution. This challenge is examined here for the first time from the perspective of its wicked dynamics, with consideration given to approaches that have proven effective elsewhere in resolving wicked environmental problems.

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Section: Habitatmentioning

confidence: 99%

Section: Overfishingmentioning

confidence: 99%

Section: The Wicked Nature Of Re-establishing Sturgeon In the Ural Rivermentioning

confidence: 99%

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Re-Establishing Naturally Reproducing Sturgeon Populations in the Caspian Basin: A Wicked Problem in the Ural River

Pueppke,

Nurtazin,

Murzashev

et al. 2023

Water

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Biological Parameters of Sturgeons from the Ural (Zhaiyk) River in the Republic Kazakhstan According to Data on Illegal, Unreported, and Unregulated Catches

Mikodina,

Ruban,

Shalgimbayeva

2024

Inland Water Biol

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Sturgeon Biological Parameters in the Ural River (Zhaiyk) of the Republic Kazakhstan

Mikodina,

Ruban,

Shalgimbaev

2024

Biologiâ vnutrennih vod

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The dynamics of capture of 4 Sturgeon species (family Acipenseridae): Russian sturgeon Acipenser gueldenstaedtii, Sterlet A. ruthenus, Stellate Sturgeon A. stellatus, Beluga Acipenser (Huso huso) in the IUU catches of the Ural (Zhaiyk) River within of the Republic of Kazakhstan borders is done. The annual number of Sturgeons estimated by arrested IUU catches in the period 2012–2018 which demonstrate the fluctuation of the Ural River Sturgeons number as well as male dominance is given. The biological indicators of Ural’s Sturgeons during the period of maximum catches in 2018: sex ratio, age, weight, length, length-weight relationship are given.

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Ural (Zhayik) River Spawning Grounds of the Sturgeon (Acipenseridae) in the Republic of Kazakhstan: Modern Situation

Cited by 3 publications

References 4 publications

Re-Establishing Naturally Reproducing Sturgeon Populations in the Caspian Basin: A Wicked Problem in the Ural River

Re-Establishing Naturally Reproducing Sturgeon Populations in the Caspian Basin: A Wicked Problem in the Ural River

Biological Parameters of Sturgeons from the Ural (Zhaiyk) River in the Republic Kazakhstan According to Data on Illegal, Unreported, and Unregulated Catches

Sturgeon Biological Parameters in the Ural River (Zhaiyk) of the Republic Kazakhstan

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