This paper is the first document on the spatial distribution of P. Juvenile individuals have been observed in healthy and uninfected populations with high survival rates.

On the other hand, it has been determined that the lowest mortality rate (9.62%) has been found at Ilgardere station. The results revealed that mass mortality was observed at the two stations (Abide Beach and Kumkale Village Beach) located near the Aegean Sea. Samplings were carried out between July and August 2020 at 9 different stations in the Çanakkale Strait. nobilis populations in the Çanakkale Strait. Accordingly, the present study aimed to determine the current status of the P. Particularly, Haplosporidium pinnae caused gigantic destruction in the P. The population of Pinna nobilis (Linnaeus, 1758) has been severely damaged, especially by the effect of the disease, in addition to the causes such as fishing activities, overexploitation, environmental pollution, habitat degradation, tourism, and human impacts. The present study provides the evidence that high trophic plasticity exists in the feeding strategy of BD, which is reflected in the ability to adjust the feeding preference according to nutritional needs and food environmental changes thus, it is competitively advantageous and may partly explain why BD is becoming the predominant species and displays an extensive distribution in the ECS. 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.

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