Results 181 to 190 of about 1,783 (204)

Role of Paedomorphosis in the Emergence of the Skull Bauplan in Acipenseriformes (Actinopterygii)

Biology Bulletin Reviews, 2020
Acipenseriformes (Actinopterygii) are commonly recognized as a sister group of Neopterygii. They represent the basal-most taxa of extant ray-finned fishes, along with Polypterus (Polypteriformes). This position on the cladogram determines the key importance of sturgeons for an understanding of the evolutionary history of actinopterygians, as well as ...
openaire   +1 more source

Early development of the pituitary gland in Acipenser naccarii (Chondrostei, Acipenseriformes): an immunocytochemical study

Anatomy and Embryology, 2004
The distribution and appearance of secretory cells in the pituitary gland were investigated for the first time in a chondrostean species, Acipenser naccarii, from embryos to juveniles, by immunohistochemistry with mammalian and teleost hormone antisera.
GRANDI, Gilberto, CHICCA, Milvia
openaire   +3 more sources

Biology and Culture of Sturgeon Acipenseriformes

1985
The annual world sturgeon catch has ranged from 20,000 to 40,000 metric tons during the past fifty years and, as such, has been less significant than the catch of many other commercial fisheries. However, because of the sturgeon’s high value as a food and game fish, this fishery has far exceeded the importance and monetary returns of many others.
openaire   +1 more source

The aquaculture of Acipenseriformes. Part 6. Northern and South America

Rybovodstvo i rybnoe hozjajstvo (Fish Breeding and Fisheries), 2020
The history and contemporary state of global aquaculture of sturgeons and paddlefish are reviewed. The paddlefish Polyodon spathula became first object of cultivation of Acipenseriformes in USA. The paddlefish has high rate of growth in ponds using natural feeds, mature females can produce about 15% of their body weight in roe similar to eggs of star ...
openaire   +1 more source

Origin and Diversification of Acipenseriforms

Journal of Ichthyology, 2022
openaire   +1 more source

Polyploidization by reticular speciation in Acipenseriform evolution: a working hypothesis

Journal of Applied Ichthyology, 1999
Summary A working hypothesis to explain the polyploid evolution of Acipenserids as a result of reticular speciation is presented. It is assumed that the process of polyploidization is a result of multiple origin of poly-chromosomal sturgeon species and different DNA content despite similar karyotypes and low rate of mtDNA evolution.
openaire   +1 more source

?????????????????? ?????????????????????? ?????????? ?? ???????????????????? ?????????????????? ?????????????????? ??????????????, Acipenser stellatus (Acipenseriformes, Acipenseridae), ?????????????? ????????

2009
Age and growth rate of Black Sea starry sturgeon (Acipenser stellatus, Pallas 1771) were studied based on analysis of pectoral fin spine sections internal structure. Time of annual growth marks formation was determined. Parameters of von Bertalanffy growth equation were estimated.
openaire   +1 more source

Cryopreservation of acipenseriformes sperm: current state and prospects. Part 1.

Fisheries
An analysis of published information in the field of cryopreservation of acipenseriformes sperm was carried out. The presented review briefly traces the historical experience in the development of cryopreservation methods and examines in detail the current state of research over the past two decades.
O. B. Dokina, A. A. Krasilnikova, K. V. Kovalev, N. D. Pronina   +3 more
openaire   +1 more source

Genetics of North American Acipenseriformes

2006
Michael R. Robinson, Moira M. Ferguson
openaire   +1 more source

Interrelationships of Acipenseriformes, with Comments on “Chondrostei”

1996
Lance Grande, William E. Bemis
openaire   +1 more source