51813_Sturgeon biodioversity an.PDF

Two specimens ofAcipenser schrenckii, 81 cm TL above; 90 cm TL below, both from the Amur River near Khabarovsk and now residing ...

Environmental Biology of Fishes 48:241–255, 1997. © 1997KIuwer Academic Publishers. Printed in the Netherlands Qiwei Wei1.2, Fu’ ...

Figure 1.Map of China and adjacent countries showing the Amur,Yellow,Yangtze and Pearl rivers and current ranges of sturgeons an ...

November) from 1981 through 1993, and in the spring of 1984. Sturgeons are caught by fishermen in accordance with our requiremen ...

iningstomachs of copperfish,Coreius heterodom, for the presence of sturgeon eggs (Deng & Xu 1991). Hydrologicaldatawere prov ...

Fisheries.–The pull nets and rowhooksused to cap- ture sturgeons in the Amur River until the 1950s were replaced by three-layer ...

168000 juveniles (1.0 to 1.5 or 20 to 30gBW) were stockedinto the Amurriver from1988 t o 1991, and the number ofyoung sturgeon i ...

Chongqing (Anonymous 1988). The Sichuan Fish- eries Research Institute (1980) reported a spawning ground near Yibing as evidence ...

Figure3.Total number of occurrences of adult Chinese paddlef- Figure2.Size frequencydistribution of Seventeenadult Chinese ish,P ...

Figure 4. Size frequency distribution of spawning population of Chinese sturgeon. A. coded separately to show sexual dimorphism ...

determine the age at first reproduction for the en- tire subsample of 341. The ages of individuals which belong to the class of ...

mous 1988). Asample of 54 femaleswithstageIV gonads had:no gonadal fat; GSI11.77–25.95% (mean 19.11%); and egg diameter 4.0x4.2– ...

Figure 7.Annual landings of the migratory population of Chi- nese sturgeon,A. sinensis ,in the Yangtze River. low the Gezhouba D ...

including 161 from the reaches above the dam (Fig. Recommendations 7). Commercial fishing has been closed since 1983, and fishin ...

sturgeon at the Yangtze estuary to permit effective Deng, X., Z.L. Deng & M.Y. Cai. 1991. Spawning population characteristic ...

Gray) in the Yangtze Estuary. pp. 435–444. In:The Proceed- ings of the First Conference on National Parks and Protected Areas in ...

Reproduction of Acipenser dabryanus Duméril, 1868,31.8 cm SL. probably from the Dongting Lake, Yangtze River, in J.T. Nichols (1 ...

EnvironmentalBiology of Fishes 48 : 257–264, 1997. © 1997 KluwerAcademicPublishers.Printedin the Netherlands. Biology and life h ...

Figure 1. Past and present ranges of Acipenser dabryanus. Data from Nichols (1943), Wu et al. (1963), Yang (1986), Zhang (1988), ...

of pertinent information that can be quickly located in order to make conservation recommendations Description Dabry’s sturgeon ...