The bivalve Corbicula japonica is a popular food in Japan. The abundance of the clam in a lake changes over time. Clam transport is assumed to be passive even after the clam’s settlement. But it is not clear whether clams can be considered like sand particles, or whether biological features of the clams affect their movement. Features of clams that differ from sediment particles and may affect movement include secretion of mucous threads, use of the foot byssus, burrowing, as well as the clam’s shape. The aim of the work was to determine whether these biological features modified the interaction with the hydrodynamics which would affect the transport of juvenile and adult clams within a lake. We performed a series of laboratory experiments to measure the critical shear stresses of clams for transport. The mucous threads substantially decreased critical shear stress and in contrast, the byssus significantly increased critical shear stress. We then performed field measurements in Lake Shinji and evaluated the possibilities of clam transport depending on these biological behaviors. Thus, the evaluated shear stresses for clams will be applied into a clam dispersal and transport simulation model, which can be useful to understand the strategy of clams’ survivals.

双壳Cor是日本最受欢迎的食物。湖泊中蛤的丰富度会随着时间而变化。即使蛤s定居后，蛤transport运输仍被认为是被动的。但是尚不清楚蛤can是否可以像沙粒一样被考虑，或者蛤biological的生物学特性是否会影响它们的活动。与沉积物颗粒不同并且可能影响运动的蛤的特征包括粘液分泌物，足底肌的使用，穴位以及蛤'的形状。这项工作的目的是确定这些生物学特征是否改变了与水动力的相互作用，从而影响了湖中幼蛤和成年蛤的运输。我们进行了一系列实验室实验，以测量运输蛤c的临界剪切应力。粘液线显着降低了临界剪切应力，相反，鼻底明显增加了临界剪切应力。然后，我们在真治湖进行了野外测量，并根据这些生物学行为评估了蛤transport运输的可能性。因此，将评估的蛤shear剪切应力应用于蛤lam扩散和运输模拟模型，这对于理解蛤survival生存策略是有用的。