Living Status and Perspective of the Silver Carp (Hypophthalmichthys molitrix) in the Lower Reach of the Yangtze River: Insights from Population Distribution, Age Structure, and Habitat Preference Analyses

Using systemic, periodic surveys from 2015 to 2019, population distribution, speculated age and habitat preference were analyzed assess the living status for Silver Carp (Hypophthalmichthys molitrix) in lower Yangtze River. Small Carps became more temporarily abundant spring autumn, catch per unit effort (CPUE) fluctuated yearly. Spatially, going Anqing (AQ) Changshu (CS), 200 mm standard length(SL) group less abundant, whereas those 400–600 >600 SL groups steadily increased. According Von Bertalanffy growth equation, exhibits isometric growth, inflection point of body weight (BW) 564.01mm 2948.31g, respectively, with a characteristic index (φ) 5.0655. The fish dominant range was 0+ 5 years, reflecting young composition fish. Furthermore, survey findings revealed that has different on selection life history. Juvenile comparatively staying River, where there exists relatively stable bifurcated river. Adult fishes mostly found CS Nantong(NT) section river is wide food rich. When compared historical data, it live AQ through NT section. perspective reach River clarified, future work should be concerned strengthening conservation restoration adequate habitat.