51813_Sturgeon biodioversity an.PDF

Figure 24. Direct evidence for paedomorphosis in the neurocranium of Acipenser brevirostrum. In a few cases we can directly obse ...

evolution of respiration in Acipenseroidei. Living stem actinopterygians and sarcopterygians are not likely to help in a broader ...

ton (Traquair 1887, Woodward 1891, I895a,b,c). Many workers equated these changes with ‘degene- racy’ of the skeleton (Goodrich ...

gans than any other groups, with estimates of 70000 organs in an adult Polyodon(Nachtrieb 1912). The chief location of these org ...

Northcutt 1978, New & Bodznick 1985) or by a com- bination of physiological and behavioral approach- As in all of the groups ...

nizing the International Conference on Sturgeon Biodiversity and Conservation. Penny Jaques, Nan- cy Ruddock and Judy Shardo hel ...

attempt to predict further changes after the construction of the planned hydro-electric power stations and diversion schemes). B ...

transmontanus unusual adaptations for bottom dwelling. Respir. Physiol.34: 153–170. Burggren, W.W. & W.E. Bemis. 1992 Metabo ...

manni Bogdanov under artifical environment conditions. Sotv. J. Dev. Biol. 22: 236–296. Goodrich, E.S. 1909. Vertebrata craniata ...

Lacepède, B.G.E. 1797. Sur laPolyodonFueille (Spatularia foli- McCallister, D.E. 1968. Evolution of branchiostegals and classifi ...

Patterson,C. 1975.Thebraincaseofpholidophoridandleptole- Rosen,R.A.&D.C.Hales.1981.Feedingofthepaddlefish,Po- pid fishes, wi ...

in Polypterini, Lepidosteoidei, and Amiodei. Pap. Anim. Morph. Kiev. 5: 17 - 71 (in Russian). Thompson, D.H. 1934. Relative grow ...

a b Sturgeons of the Danube River and one of their hybrids: a-Acipenser ruthenus43 cm TL from the Fish Culture Research Institut ...

Environmental Biology of Fishes 48: 73 - 126,1997. © 1997Kluwer Academic Publishers. Printed in the Netherlands. Osteology and p ...

ground swell of interest in sturgeon biology (e.g., Binkowski & Doroshov 1985, Williot 1991, Gersha- novich & Smith1995) ...

Acipenseriformes Acipenseroidei Figure 1.proposed phylogenetic relationships within Acipenseriformes: Characters defining this c ...

Materials and methods Phylogenetic methods Interrelationships among genera of Acipenseridae were examined using cladistic method ...

four generaHuso, Acipenser,Scaphirhynchus,and Pseudoscaphirhynchus. At higher levels, the taxa recognized in this study are the ...

Acipenseridae. Some species ofAcipenserregress Character 2. DermaIboneforms a pectoral fin spine the ventral scutes (e.g.,A. ful ...

a Acipenser transmontanus b Acipenseroxyrinchus Figure 2.Pectoral fin spine of Acipenseridae (Character 2): a-Illustrations of t ...