51813_Sturgeon biodioversity an.PDF

bry’s sturgeon is adaptable to a variety of habitats, individuals prefer sublittoral areas 10-20 m from the river bank, with cur ...

least 6 years of age; all are mature by 8 years. Ma- ture females generally weighat least 9 kg. In natural populations. only 6.7 ...

mid-gastrula stage occurs 28–30 hours after fertil- Aquaculture, fisheries, and conservation ization, neurulation is complete 43 ...

United States and Russia (Graham 1986, Smith 1990, 1991, Khodorevskaya et al. 1997 this volume). Perhaps Dabry’s sturgeon could ...

geon,Acipenserdabryanus.pp. 179–187.In:The Biology of Sturgeons in Changjiang and Their Artificial Propagation, Si- chuan Scient ...

Environmental Biology of Fishes48:265–278, 1997. © 1997Kluwer Academic Publishers. Printed in the Netherlands Observations on th ...

obtained from sturgeon broodstock raised at five commercial farms in Northern California and at the University of California, Da ...

Figure 1. Different states of gametogenesis in cultured white sturgeon male. Paraffin sections stained by H&E (scale at bott ...

Figure 2. Different states of gametogenesis in cultured white sturgeon female. Paraffin sections stained by PAS: a-early phase o ...

posetissue. Meiosisstarts in October-November and continues for 3–4months.Ripemalesthathave completed thefirstcycle ofspermatoge ...

Figure 3. Total plasma calcium (Ca) concentrations and diameter (ED) of vitellogenic ovarian follicles in eight females repeated ...

Figure 4.Approximate length and seasonality of the testicular and ovarian cycles in domestic white sturgeon. based on observ a- ...

Figure 5.The age and body size at puberty in cultured white stur- geon females. Data are pooled observations on the broodstock o ...

cultured Siberian sturgeon,A. baerii(Akimova et al, 1979, Williot et al. 1991). Neuroendocrine control Knowledge of the neuroend ...

tellogenesisin females, the pituitary concentrations was found that stGTH II was more potent than of both gonadotropins increase ...

plasma androgens (Moberg et al. 1995, Cuisset et al. warm water. In the wild, most species of sturgeons 1995). Recently, we demo ...

evidenceis available, to our knowledge. The effect of seasonal factors on reproduction of Acipenseri- stocks of Russian sturgeon ...

River in 1973, as determined by the distribution of larvae. Cali- fornia Fish and Game 62: 32–40. Kroll, K.J. 1990. Preliminary ...

geon. pp. 389–399.In:P. Williot (ed.) Acipenser, CEMA- GREF Publ., Bordeaux. Moberg, G.P., J.G. Watson,H. Papkoff, K.J. Kroll &a ...

EnvironmentalBiologyof Fishes 48:279–289,1997. © 1997Kluwer Academic Publishers.Printed in theNetherlands. Contemporary status o ...