![]() Relatively low fish prey in April forced BD to adjust its diet, adding the ingestion of shrimps and cephalopods corresponding to temporal variations in food availability. It can be explained by varied food availability in ECS. Interestingly, the fish’s contribution to BD showed obvious seasonal variation. ![]() ![]() Further quantitative analysis based on the MixSIAR model showed that BD mainly fed on zooplankton and fish, but its feeding habit was characterized by the consumption of gradually reduced zooplankton and increased fish associated with increased body size. ![]() More importantly, the TP of BD within the same body size showed wide amplitude, indicating BD possess high trophic plasticity, and can capture prey from low to high trophic levels. Significant differences in δ ¹³ C and δ ¹⁵ N values were found between sampling months and among body sizes. Using stable isotope analysis (SIA), we investigated the trophic ecology of BD in the south-central ECS in two periods. Bombay duck (BD) outcompete other traditionally commercial fishes in the East China Sea (ECS) in recent years, displaying a continuous and sharp increase of catches, however, little is known whether the competition advantage of BD was related to its trophic plasticity. High trophic plasticity is often invoked to explain the successful expansion of many aquatic species. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |