Big Amu Darya Shovelnose Sturgeon (Pseudoscaphirhynchus kaufmanni)
Small narrow snout (dwarf) form
https://life-on-earth.ru/amu-darya-and-syr-darya-shovelnose-sturgeons/amu-darya-shovelnose-sturgeons-pseudoscaphirhynchus-nukus-balyk-hatchery-brood-stock-data-base/2-uncategorised/132-pseudoscaphirhynchus-kaufmanni-nukus-balyk-hatchery-brood-stock-inaturalist-343826677-chip-531348#sigProId3c79daadde
The first 10 photos were taken on 04.04.2026
The next 4 photos were taken on 19.03.2026
iNaturalist link:
https://www.inaturalist.org/observations/343826677
Microchip implant 900263004-531348
Implanted 04.04.2026
Origin:The Amu Darya river, town of Pitnak area (Khorezm province, Uzbekistan); 18.03.2026; weight 140 g
The weight data may not be correct before 04.04.2026 due to scales lapse that were not properly checked.
Ultra sound screening with AcuVista VT880a portable water proof ultra sound scanner:
Date: 04.04.2026
Result: female with mature eggs
Weight on 04.04.2026 - 139 g
Biopsy of eggs was taken on 05.04.2026
Result: Polarization factor 0,13-0,14 (not ready to spawn yet)
Water temperature in the pool is + 17,5 oC (beneath spawning temperature)
https://life-on-earth.ru/amu-darya-and-syr-darya-shovelnose-sturgeons/amu-darya-shovelnose-sturgeons-pseudoscaphirhynchus-nukus-balyk-hatchery-brood-stock-data-base/2-uncategorised/132-pseudoscaphirhynchus-kaufmanni-nukus-balyk-hatchery-brood-stock-inaturalist-343826677-chip-531348#sigProIdc7e64d6225
Videos of ultra sound screening on 04.04.2026: