51813_Sturgeon biodioversity an.PDF

ideal for retaining small prey (fishes and/or insect Rostrum and flattening larvae) that they prefer, as well as to winnow detri ...

of extensive adult scalation and peduncle scalation inScaphirhynchus is unclear, but correlates well with their benthic life his ...

benthic prey fauna continued with evolution of preferential benthic cruising acipenserines. Many species ofAcipenserdepend on be ...

Acipenseridae is defined by a pervasive array of rinac; Characters 48. 52, 54 for Scaphirhynchini), peramorphic characters. Scut ...

Future research on Acipenseridae with facilities, finances, and help that made field work rewarding and beneficial. This project ...

system of fishes. Trudy Zoologicheskogo Instituta 7: 7–57 (in Goodrich, E.S. 1909. Vertebrata Craniata. First fascicle: cyclos- ...

dem Yangtsekiang und über die sogenannten Glaspolypen. Monats. Deulsch. Akad. Wissen. Berlin 1861: 476–480. Nielsen, E. 1949. St ...

Environmental Biology ofFishes48:127–155,1997. © 1997KluwerAcademicPublishers. Printed in theNetherlands. Phylogeny of the Acipe ...

Within Acipenseriformes, all workers agree that ous occur in Central Asia (Nesov & Karnyshkin the Acipenseridae and Polyodon ...

Table 1.Chromosome numbers and DNA content in the Acipenseriformes, Lepiaosteiformes, and Amiiformes^1. Species Chromosome DNA c ...

Table 1(Continued). Species Chromosome DNA content in Ploidy, n Reference numbers Pg (according to the DNA content) Far East and ...

Table 2.Characteristics of karyotypes of several acipenseriform species^1. Species Chromo- Number of Number of Number of Approxi ...

rent views on paleogeography will provide useful The size of macrochromosomes in both groups is tools for resolving complex rela ...

chromosome number in three generations of the ‘bester’, the fertile hybrid between beluga, Huso huso,and sterlet,A. ruthenus,doe ...

nucleus in species investigated (Table 3): 2–4 (maxi- of four homologs, and Dingerkus & Howell (1976) mum 6) in the 120-chro ...

Table4.Natural hybridization of sturgeon species and their ploidy. Interspecies hybrids Intergenera hybrids Caspian Sea basin^1 ...

cated loci is much lower, only 6%(Carlson et al. 1982). Why this is so is unknown. In this species du- plicated loci for insulin ...

teristics of the karyotypes of spotted ratfish, gars, and sturgeons, Ohno (1970) and later Dingerkus (1979) proposed that the an ...

Figure 1. A schematic representation of changes in ploidy in Acipenseriformes. M = macro-, m = microchromosomes ly more symmetri ...

biology, and ecology, as well as overlapping ranges character in cladistic terms) to the hypothetical in western North America ( ...