【摘要】 为了探究不同泥沙比底质对泥螺（Bullacta exarata）潜沙行为的影响，观察了泥螺在不同泥沙比底质的潜沙行为，判断其对底质的偏好性，并通过检测自然滩涂底质与不同配比底质间的物化指标，分析其对泥螺潜沙行为的影响，探究不同泥沙比底质对泥螺潜沙行为影响的原因。结果表明：（1）泥螺潜沙行为分为准备期、潜沙期及结束期，潜沙期为主要阶段；（2）在5种实验底质中，泥沙比3∶7的底质泥螺分布率最大，其次为泥沙比1∶1底质；不同底质中泥螺24 h潜沙率无显著性差异；在纯沙、泥沙比3∶7和1∶1的3种底质中，泥螺潜沙深度无显著性差异，且均显著高于泥沙比7∶3和纯泥底质；（3）泥螺在5种底质中的分布率与底质中水溶性Ca²⁺、Mg²⁺含量呈负相关；潜沙深度与有机碳、有机质含量呈负相关，与平均粒径大小呈正相关；泥螺24 h潜沙率与有机碳和有机质的含量呈负相关。综合分析得出，泥沙比3∶7底质更适合泥螺潜沙。本研究结果为找到泥螺潜沙行为最活跃的底质配比，优化泥螺养殖环境提供了理论依据。更多还原

【Abstract】 In order to explore the effects of different substrates on the sediment submersion behavior of mud snails（Bullacta exarata）, this study investigates the submersion behavior of B.exarata in substrates with different sediment-to-sand ratios, to assess their substrate preference. The study also analyzed the physicochemical properties of natural tidal flat sediments and substrates with various sediment-to-sand ratios to explore their impact on the burrowing behavior of mud snails and to identify the underlying reasons. The results indicated that: 1) The submersion behavior of mud snails could be divided into preparation, burrowing, and termination phases, with the burrowing phase being the primary stage; 2) Among the five experimental substrates, the highest distribution rate of mud snails was observed in the group with the sediment-to-sand ratio of 3∶7, followed by 1∶1 ratio. There was no significant difference in the 24-hour burrowing rate among different substrates. In pure sand, and substrates with sediment-to-sand ratios of 3∶7 and 1∶1, the burrowing depth of mud snails showed no significant difference and was significantly greater than that in substrates with ratio of 7∶3 and pure mud; 3) The distribution rate of mud snails in five substrates was negatively correlated with the water-soluble Ca²⁺ and Mg²⁺ contents in the substrate. Burrowing depth was negatively correlated with organic carbon and organic matter content and positively correlated with the average particle size. The 24-hour burrowing rate was negatively correlated with the content of organic carbon and organic matter. The comprehensive analysis showed that the 3∶7 substrate sediment was more suitable for mud snails. These findings provide a theoretical basis for identifying the optimal substrate composition that promoted the most active burrowing behavior in mud snails and for optimizing their farming environment.更多还原