First observations of intersex development in paddlefish Polyodon spathula

2020 ◽  
Vol 97 (3) ◽  
pp. 919-925
Author(s):  
Jason D. Schooley ◽  
Adam Geik ◽  
Dennis L. Scarnecchia
Keyword(s):  
Polyodon Spathula

Allelic Polymorphism of Ukrainian Stocks of Paddlefish (Polyodon spathula)

2019 ◽  
Vol 55 (3) ◽  
pp. 14-19 ◽  
Author(s):  
Kh. M. Kurta ◽  
O. O. Malysheva ◽  
M. Yu. Yevtushenko ◽  
V. G. Spyrydonov
Keyword(s):  
Allelic Polymorphism ◽  
Polyodon Spathula

Research Regarding Content in Amino-acids and Biological Value of Proteins from Polyodon spathula Sturgeon Meat

2017 ◽  
Vol 68 (5) ◽  
pp. 1063-1069
Author(s):  
Cristina Simeanu ◽  
Daniel Simeanu ◽  
Anca Popa ◽  
Alexandru Usturoi ◽  
Dan Bodescu ◽  
...  
Keyword(s):  
Amino Acids ◽  
Nutritive Value ◽  
Essential Amino Acids ◽  
Meat Production ◽  
Age Group ◽  
Chemical Methods ◽  
Biological Value ◽  
Polyodon Spathula ◽  
The One ◽  
Total Amino Acids

Polyodon spathula sturgeon breed is successfully reared in Romania in many fishery farms for meat production and it is capitalized on domestic market as consumption fish. In the current paper were studied a number of 1400 sturgeons from Polyodon spathula breed (1200 individuals of one summer - P.s.0+ and 200 individuals of fourth summers - P.s.3+). From this flock were weighted around 10%, for each age group, and for laboratory determinations were chosen 10 fishes for each age with the corporal mass close to the group mean. After analysing the fillets gathered from the studied fishes for establishing the chemical characteristics, nutritive and biological values of proteins were drawn some interesting conclusions. So, regarding chemical composition we notice that in the meat of analysed fishes water is in a rate of 75.41% at P.s.3+ and 78.37% for P.s.0+; proteins - between 18.08% for P.s.0+ and 19.89% for P.s.3+, values which place those fishes in the group of protein fishes; lipids - between 2.45% and 3.45%, values which situated those sturgeons in category of fishes with a low content in lipids; collagen � 3.83% at P.s.0+ and 4.14% at P.s.3+ which indicate low values for proteins of weak quality in the meat of those sturgeons. Study of nutritive value for the analysed fishes indicate the fact that fishes P.s.0+ have a mediocre nutritive value, having the ratio w/p of 4.33 while sturgeons P.s.3+ were placed in the 2nd category � fishes with a good nutritive value (rate w/p = 3.79). Energetic value of the studied fillets was 97.39 kcal/100 g for P.s.0+ and 114.31 kcal/100 g for P.s.3+, which enlightened an increase of nutritive value with aging, fact especially due to accumulation of adipose tissue. Study of proteins quality, through the presence of those 8 essential amino-acids in the meat of analysed fishes, show the fact that at sturgeons P.s.0+ proportion of essential amino-acids was 20.88% from total amino-acids, while at sturgeons P.s.3+ was 26.23%, fact which enlightened an increasing of proteins� biological value with fish aging. This fact was also shown by calculation of proteins� biological value through chemical methods (EAA index); calculated value for sturgeons P.s.0+ was a little bit lower (118.73) than the one calculated for sturgeons P.s.3+ (118.79).

scholarly journals The primitive pores of Polyodon spathula (Walbaum)

1910 ◽  
Vol 9 (2) ◽  
pp. 455-468 ◽  
Author(s):  
Henry F. Nachtrieb
Keyword(s):  
Polyodon Spathula

Growth, Condition, and Size Distribution of Paddlefish,Polyodon spathula, Juveniles Reared in Ponds at Three Densities

2008 ◽  
Vol 39 (4) ◽  
pp. 565-571 ◽  
Author(s):  
Richard J. Onders ◽  
Steven D. Mims ◽  
Siddhartha Dasgupta
Keyword(s):  
Size Distribution ◽  
Growth Condition ◽  
Polyodon Spathula

Alterations of digestive enzyme activities, intestinal morphology and microbiota in juvenile paddlefish, Polyodon spathula, fed dietary probiotics

2014 ◽  
Vol 41 (1) ◽  
pp. 91-105 ◽  
Author(s):  
Cheng Fang ◽  
Mingyang Ma ◽  
Hong Ji ◽  
Tongjun Ren ◽  
Steven D. Mims
Keyword(s):  
Enzyme Activities ◽  
Digestive Enzyme ◽  
Intestinal Morphology ◽  
Polyodon Spathula ◽  
Digestive Enzyme Activities

Evaluation of three organic fertilizers for paddlefish,Polyodon spathula, production in nursery ponds

Aquaculture ◽  
1991 ◽  
Vol 99 (1-2) ◽  
pp. 69-82 ◽  
Author(s):  
Steven D. Mims ◽  
Julia A. Clark ◽  
James H. Tidwell
Keyword(s):  
Organic Fertilizers ◽  
Polyodon Spathula

Ultrastructural study of spermatozoa of the paddlefish, Polyodon spathula

Zygote ◽  
2005 ◽  
Vol 13 (3) ◽  
pp. 241-247 ◽  
Author(s):  
Otilia Zarnescu
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ultrastructural Study ◽  
Primitive Type ◽  
Polyodon Spathula ◽  
Transmission Electron ◽  
Architectural Features

Paddlefish, Polyodon spathula, spermatozoa were examined by transmission electron microscopy. Their structure has the same characteristic architectural features as sturgeon spermatozoa. Paddlefish spermatozoa are of the primitive type and consist of a rod-shaped head, a midpiece and a long flagellum. The head is about 5.15 mm in length and contains the nucleus and an apical acrosomal complex. Inside the nucleus there are three nuclear channels that begin in the subacrosomal area and have a triple helical arrangement. An nuclear fossa is present centrally, at the posterior end of the nucleus. The midpiece contains a pair of centrioles in a perpendicular arrangement, mitochondria and a narrow cytoplasmic sleeve. The flagellum has a central axoneme with a 9+2 pattern and two lateral projections or fins.

Anatomy and histology of the digestive system of the paddlefish (Polyodon spathula)

1973 ◽  
Vol 140 (2) ◽  
pp. 243-255 ◽  
Author(s):  
George F. Weisel
Keyword(s):  
Digestive System ◽  
Polyodon Spathula

Polychlorinated Biphenyls and Chlordane in the Gonads of Paddlefish, Polyodon spathula, from the Ohio River

1998 ◽  
Vol 61 (5) ◽  
pp. 650-657 ◽  
Author(s):  
D. T. Gundersen ◽  
M. D. Krahling ◽  
J. J. Donosky ◽  
R. G. Cable ◽  
S. D. Mims
Keyword(s):  
Polychlorinated Biphenyls ◽  
Ohio River ◽  
Polyodon Spathula

Apparent digestibility coefficients of protein, lipid and carbohydrate in practical diets fed to paddlefish,Polyodon spathula(Walbaum)

2009 ◽  
Vol 40 (15) ◽  
pp. 1785-1788 ◽  
Author(s):  
Richard J Onders ◽  
Steven D Mims ◽  
Carl D Webster ◽  
Ann L Gannam
Keyword(s):  
Apparent Digestibility ◽  
Polyodon Spathula
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