Results 21 to 30 of about 1,457 (192)

Application of piezoactuators in the technology of low-temperature preservation of fish reproductive cells [PDF]

open access: yesE3S Web of Conferences, 2023
The sperm of Russian sturgeon (Acipenser gueldenstaedtii Brandt et Ratzeburg, 1833) was the research object. Acoustic-mechanical influence on sturgeon semen improves fish-biological and reproductive indices of the seminal fluid.
Ponomareva Elena   +6 more
doaj   +1 more source

The Preference of Anadromous Sturgeon Species Regarding Temperature and Depth Parameters During Spawning Migration in The Lower Danube [PDF]

open access: yesE3S Web of Conferences, 2023
Anadromous sturgeon populations in the Lower Danube are in severe decline, and this is due to a combination of anthropogenic and natural factors that have a major impact on the life cycle of the species.
Deák György   +5 more
doaj   +1 more source

EVOLUTION OF RUSSIAN STURGEON STOCKS (ACIPENSER GUELDENSTAEDTII) IN THE SOUTHERN CASPIAN SEA, IRAN

open access: yes‬‭Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 2004
The changes of Russian sturgeon stocks in the southern Caspian Sea was studied by measuring and considering different population parameters such as fish length, weight and age and also fluctuation of catch and catch per unit effort.
M. Moghim
doaj   +3 more sources

Occurrence of exotic Russian sturgeons, Acipenser gueldenstaedtii Brandt et Ratzeburg, 1833 (Actinopterygii: Acipenseridae) in the Baltic Sea [PDF]

open access: yesActa Ichthyologica et Piscatoria, 2003
Exotic species of acipenserid fishes have been frequently encountered in the commercial catches of the Baltic Sea, since the early 1990s. Such sightings are rarely reflected as published records.
S. Keszka, T. Heese
doaj   +3 more sources

Gonadotropins in the Russian Sturgeon: Their Role in Steroid Secretion and the Effect of Hormonal Treatment on Their Secretion. [PDF]

open access: yes, 2016
In the reproduction process of male and female fish, pituitary derived gonadotropins (GTHs) play a key role. To be able to specifically investigate certain functions of Luteinizing (LH) and Follicle stimulating hormone (FSH) in Russian sturgeon ...
Aizen, Joseph   +8 more
core   +7 more sources

Detection of white sturgeon iridovirus (WSIV) in sturgeons (Actinopterygii: Acipenseriformes: Acipenseridae) from aquaculture facilities located in Poland, Germany, and Italy [PDF]

open access: yesActa Ichthyologica et Piscatoria, 2019
Background. White sturgeon iridovirus (WSIV) is one of the most serious threats for sturgeon aquaculture as the mortality in juvenile individuals can reach 95%.
P. Hofsoe-Oppermann   +3 more
doaj   +3 more sources

Koi herpes virus: do acipenserid restitution programs pose a threat to carp farms in the disease-free zones? [PDF]

open access: yesActa Ichthyologica et Piscatoria, 2009
Background. Sturgeons have long been extinct in Polish inland waters. A substantial effort has recently been put into their restitution, covering the drainage areas of two major Polish rivers, the Oder and the Vistula.
S.M. Bergmann   +7 more
doaj   +3 more sources

River Damming Impacts on Fish Habitat and Associated Conservation Measures

open access: yesReviews of Geophysics, Volume 61, Issue 4, December 2023., 2023
Abstract River damming has brought great benefits to flood mitigation, energy and food production, and will continue to play a significant role in global energy supply, particularly in Asia, Africa, and South America. However, dams have extensively altered global river dynamics, including riverine connectivity, hydrological, thermal, sediment and ...
Qiuwen Chen   +16 more
wiley   +1 more source

Investigation of rheological, physicochemical, and sensorial properties of traditional low‐fat Doogh formulated

open access: yesFood Science &Nutrition, Volume 11, Issue 11, Page 7218-7228, November 2023., 2023
Two‐phase Doogh is the main challenge of keeping it in the refrigerator. Use of hydrocolloids for the stability of dairy drinks. Application of mathematical models in estimating rheological models of Doogh samples. Abstract Doogh is a fermented beverage made from yoghurt with water and salt. Similarly, drinks based on yoghurt are available in different
Fatemeh Rahmati   +3 more
wiley   +1 more source

Are Mediterranean marine threatened species at high risk by climate change?

open access: yesGlobal Change Biology, Volume 29, Issue 7, Page 1809-1821, April 2023., 2023
We evaluate the risk of Mediterranean threatened marine species to climate change, combining a trait‐based evaluation of their vulnerability and exposure to future thermal conditions. More than one‐quarter of threatened Mediterranean marine species are at high climate risk, with hotspots of risk occurring in the west Mediterranean, Adriatic and Aegean ...
Anastasia Chatzimentor   +3 more
wiley   +1 more source

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