Results 171 to 180 of about 1,783 (204)
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Polyploidy in Acipenseriformes: Cytogenetic and Molecular Approaches
2007Cytogenetic and molecular data gave insights into species differentiation processes within the sturgeon order, suggesting new taxonomical and phylogenetic relationships.
FONTANA F +3 more
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Molecular biological study on hormones in Acipenseriformes
Hereditas (Beijing), 2011Sturgeons 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
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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 +2 more
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Sperm maturation in sturgeon (Actinopterygii, Acipenseriformes): A review
Theriogenology, 2017The 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 +8 more
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Leo Semenovich Berg and the biology of Acipenseriformes: A dedication
Environmental Biology of Fishes, 1997This 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
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Sturgeon rivers: an introduction to acipenseriform biogeography and life history
Environmental Biology of Fishes, 1997We 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
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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
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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
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Complete mitochondrial genome ofAcipenser schrenckii(Acipenseriformes, Acipenseridae)
Mitochondrial DNA, 2013Abstract 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 +3 more
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Nematocysts of Polypodium hydriforme, a cnidarian parasite of acipenseriform fishes
Hydrobiologia, 2004Structure of nematocysts from Polypodium hydriforme was studied by scanning and transmission electron microscopy. Two nematocyst types were observed: holotrichous isorhizas with minute spines, and true atrichous isorhizas. Among holotrichous isorhizas four morphological categories were distinguished based on differences in morphology of their ...
Alexey Ibragimov, Ekaterina Raikova
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Threatened fishes of the world: Psephurus gladius (Martens, 1862) (Acipenseriformes: polyodontidae)
Environmental Biology of Fishes, 2009[Gao, Xin; Wang, Jian Wei] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei Province, Peoples R China; [Brosse, Sebastien] Univ Toulouse 3, CNRS, Lab Evolut & Divers Biol, UMR 5174, F-31062 Toulouse 4 ...
Gao, X., Wang, J.W., Brosse, S.
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