Results 151 to 160 of about 784 (183)

The threatened status of acipenseriform species: a summary

Environmental Biology of Fishes, 1997
...increased demand has recently driven the price of black market smoked sturgeon as high as $ 26 a kilogram. With poachers standing to gain roughly a third of this price [besides the much higher price of caviar], a large fish could be worth thousands of dollars.
Vadim J. Birstein, William E. Bemis, John R. Waldman   +2 more
openaire   +1 more source

Sturgeons and paddlefishes (Acipenseriformes)

2009
Abstract The extant sturgeons (Acipenseridae, containing four genera—Acipenser, Huso, Pseudoscaphirhynchus, and Scaphirhynchus) and paddleAshes (Polyodontidae, containing two monospeciAc genera—Polyodon and Psephurus) with some extinct families form a monophyletic group of the ray-Anned Ashes, the Order Acipenseriformes.
Zuogang Penga, Rui Diogob, Arne Ludwigc, Shunping Hea   +3 more
exaly   +2 more sources

Molecular biological study on hormones in Acipenseriformes

Hereditas (Beijing), 2011
Sturgeons belong to the Acipenseriformes, which provide an ideal model for evolutionary studies due to their unique characters. At present, many species of Acipenseriformes are very rare and near extinct. It is urgent to protect these species. However, data on molecular mechanisms of their growth and reproduction regulation are still limited.
Hong CAO, Rong-Jia ZHOU
openaire   +3 more sources

Identification of Acipenseriformes species in trade

Journal of Applied Ichthyology, 2008
Summary Sturgeons and paddlefishes (Acipenseridae) are highly endangered freshwater fishes. Their eggs (sold as caviar) are one of the most valuable wildlife products in international trade. Concerns of overharvesting and the conservation status of many of the 27 extant species of Acipenseriformes led to all species being included on the CITES ...
exaly   +2 more sources

Morphological Phylogeny of the Order Acipenseriformes

Journal of Applied Ichthyology, 2006
exaly   +2 more sources

Sperm maturation in sturgeon (Actinopterygii, Acipenseriformes): A review

Theriogenology, 2017
The morphology of the reproductive system of acipenseriform fishes is quite different from that of teleostean species, but an associated unique physiological difference in male sturgeons was not discovered until recently; sperm of sturgeons passes through the kidneys then via Wolffian ducts into the environment rather that emptying directly through ...
Borys, Dzyuba, Jacky, Cosson, Viktoriya, Dzyuba, Pavlo, Fedorov, Olga, Bondarenko, Marek, Rodina, Otomar, Linhart, William L, Shelton, Sergii, Boryshpolets   +8 more
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Leo Semenovich Berg and the biology of Acipenseriformes: A dedication

Environmental Biology of Fishes, 1997
This volume is dedicated to the memory of Leo Semenovich Berg (1876–1950), a Russian ichthyologist and geographer. In the foreword to the English translation of Berg's remarkable treatise, ‘Nomogenesis or evolution according to law’, Theodosius Dobzhansky wrote: ‘Berg was one of the outstanding intellects among Russian scientists.
Vadim J. Birstein, William E. Bemis
openaire   +1 more source

Sturgeon rivers: an introduction to acipenseriform biogeography and life history

Environmental Biology of Fishes, 1997
We present an overview of the global distribution of all 27 living species of Acipenseriformes in an attempt to understand their biogeographic history and the range of life history patterns displayed by different species. Our biogeographic analysis (based on the most recent phylogenetic analysis including fossil Acipenseriformes) suggests that ...
William E. Bemis, Boyd Kynard
openaire   +1 more source

Complete mitochondrial genome ofAcipenser schrenckii(Acipenseriformes, Acipenseridae)

Mitochondrial DNA, 2013
Abstract The complete nucleotide sequence of Acipenser schrenckii mtDNA is 16,592 bp long (Accession No. KC820796). The total mitochondrial genome is consisted of 13 protein-coding genes, 2 rRNA genes, 22 tRNA genes and 1 control region. The gene organization and arrangement is identical to typical vertebrates.
Xiao-Li, Dong, Jing, Yu, Ying, Zhang, Da-Jiang, Sun   +3 more
openaire   +2 more sources

Olfactory organ of acipenseriformes and comparison with other actinopterygians: Patterns of diversity

Journal of Morphology, 1994
AbstractThe position and structure of the olfactory organ and its openings vary among actinopterygians. The anterior nasal opening is a simple perforation in the skin in many extant actinopterygians (e.g., acipenseriforms, lepisosteids, and primitive Recent teleosts) and represents the primitive condition.
Xin-Yu, Chen, Gloria, Arratia
openaire   +2 more sources