Populations of sturgeon (Acipenseridae) are declining in many places in the world because of several potential factors, including overharvesting, habitat alteration, and pollution. In North America, populations of the white sturgeon (Acipenser transmontanus) have been experiencing poor annual recruitment in major river systems for more than three decades. Metal pollution has been hypothesized a...

The current status of the inland waters ichthyofauna Iran is revised and updated. A total 292 fish species belong to 3 classes, 24 orders, 36 families 106 genera inhabit Iran. Among these, 29 (9.9%) are exotic 102 (35%) endemic. Orders with largest numbers in Cypriniformes (182 species) followed by Gobiiformes (30 species), Cyprinodontiformes (15 Siluriformes (12 Clupeiformes (10 Acipenseriform...

Acipenser fulvescens, the lake sturgeon, belongs to one of the few extant non-teleost ray-finned (bony) fishes. The sturgeons (family Acipenseridae) have a phylogenetic history that dates back about 250 million years. The study reported here is the first investigation of peripheral coding strategies for spectral analysis in the auditory system in a non-teleost bony fish. We used a shaker system...

Populations of sturgeon (Acipenseridae) have experienced global declines, and in some cases extirpation, during the past century. In the current era of climate change and over-harvesting of fishery resources, climate models, based on uncertain boundary conditions, are being used to predict future effects on the Earth's biota. A collection of approximately 400-year-old Atlantic sturgeon spines f...

Estimations of a poaching catch in the Amur estuary for kaluga and amur sturgeon are presented. Total illegal these species 2011 2016 is amounted as 8,300 15,060 ind. or 409.1 745.0 t, respectively. The volume on exceeded 1–2 orders (in 26–268 times) legal research purposes artificial reproduction. relatively stable through decades.

The ecological aspect of the behavioral and physiological adaptation fish in autumn-winter period water bodies temperate subarctic climatic zones Northern Hemisphere is considered. It has been established that studied areas with a decrease temperature form aggregations deep, low-speed sites for successful wintering. In considered life cycle, metabolism slows down to reduce depletion lipid reser...