三疣梭子蟹4个野生群体形态差异分析

了解梭子蟹、虾蛄中重金属镉的污染情况，及时发现食品安全问题和隐患。

对上海市市售的产自不同省份的梭子蟹、虾蛄，按不同区域和场所分类采集，并对部分样品进行组织部位制样。采用石墨炉原子吸收光谱法进行镉项目检测，并对梭子蟹和虾蛄中镉残留展开暴露评估。

124批梭子蟹中，镉检出率为100%（124/124）；63批虾蛄中，镉检出率为100%（63/63）。不同组织部位的镉含量不同，梭子蟹和虾蛄可食部位中肝胰脏镉的富集程度最高。梭子蟹肝胰脏镉平均检出值、P₅₀、P₉₅分别占每月耐受摄入量（PTMI）的52.64%、49.28%和98.65%；虾蛄肝胰脏镉平均检出值、P₅₀、P₉₅分别占PTMI的30.76%、32.04%和46.16%。

梭子蟹和虾蛄中的重金属镉平均残留量整体处于安全范围内。

Analysis of morphological variations among four wild populations of Portunus trituberculatus

To understand the concentration of heavy metal cadmium and cadmium in portunus and mantis shrimp， and to timely identify food safety problems and potential hazards.Portunus and mantis shrimp samples from different provinces were collected and categorized based on different regions and locations， and some samples were made from tissue parts. Graphite furnace atomic absorption spectrometry was used to detect cadmium items， the cadmium exposure of portunus and mantis shrimp was evaluated simultaneouslyThe detection rate of cadmium in 124 batches of portunus sold in Shanghai was 100% （124/124）， the detection rate of cadmium in 63 batches of mantis shrimp sold in the market was also 100% （63/63）. The cadmium content varied in different tissue parts， and the cadmium enrichment in hepatopancreas was the highest in the edible parts of portunus and mantis shrimp. The average detection value， 50th percentile value， 95th percentile value of cadmium in the hepatopancreas of portunus accounted for 52.64%， 49.28% and 98.65% of the PTMI， respectively. The average detection value， 50th percentile value and 95th percentile value of cadmium in the hepatopancreas of mantis shrimp accounted for 30.76%， 32.04% and 46.16% of the PTMI， respectively.The average residual levels of heavy metal cadmium in portunus and mantis shrimp are within the safe range.