Abstract:is one of the important commercial fish in the Yangtze River, and the section between Yichang and Jingzhou is an important spawning ground and habitat of . In order to study its population status in this area, 470 samples were collected from the annual survey of H. molitrix has a relatively complex age structure, which contains 7 age classes ranging from 1 to 7. The preponderant age class was comprised of 3-5 year-old individuals, making up 72.7% of the total. Body-length range of the population was 18.2-93.8 cm, mainly between 40.0-70.0 cm (77.2%). The relation between body length and body weight was estimated as =0.9297, =470), for non-uniform motion pattern; Von Bertalanffy equations and the corresponding growth curves were calculated as W; growth parameters were estimated as =4.2753 kg growth inflection was 5.43 years, and inflection point length and inflection point weight were =4.2753 kg, respectively. The results showed that the population structure of was complex, but the growth performance had declined. Conservation of the population and habitat of this species should be prioritized.
长江中游宜昌
