PDF(Pubmed)
Abstract：
Animals have evolved diverse comminuting tools. While vertebrates possess mineralized teeth, insect mandibles often bear metal-inclusion-hardened serrated cusps. Microscopic dental enamel wear (microwear) is known to be caused by contact with ingesta. To test if insect mandible microwear is also diet-dependent, we kept newly moulted adult two-spotted crickets (Gryllus bimaculatus) for four weeks on alfalfa-based rodent pellets with and without added mineral abrasives (loess, quartz, volcanic ash). Six crickets per diet were examined after 1, 3, 7, 14, 21 and 28 days. All diets induced progressive mandible wear, affecting specific locations along the distal tooth cusps differently. The depth of furrows increased on most abrasive-containing diets until day 21, while wear mark complexity increased from day 1 to 3 and 14 to 21. After 28 days, these parameter values for large volcanic ash and large quartz diets significantly exceeded those for the control diet. These results are comparable to observations from guinea pig feeding experiments with the same diets. Cricket mandible wear was affected by all abrasives. Notably, large volcanic ash and large quartz induced the deepest, most complex lesions, akin to observations in guinea pigs. This suggests a universal wear process, supporting that microwear analyses are suitable for inferring invertebrate diets.
摘要：
动物已经进化出各种各样的粉碎工具。虽然脊椎动物拥有矿化的牙齿，昆虫下颌骨通常带有金属包裹硬化的锯齿状尖点。众所周知，牙釉质的微观磨损（微磨损）是由与牙釉质的接触引起的。为了测试昆虫下颌骨微磨损是否也依赖于饮食，我们在有或没有添加矿物磨料的苜蓿基啮齿动物颗粒上保留了新蜕皮的成年两斑of（Gryllusbimaculatus）四个星期（黄土，石英,火山灰）。在1、3、7、14、21和28天后检查每种饮食6只the。所有饮食都会导致下颌骨进行性磨损，影响沿远端牙尖的特定位置不同。直到第21天，大多数含磨料的饮食的沟槽深度都增加了，而磨损标记的复杂性从第1天到第3天和第14天到第21天增加。28天后,大量火山灰和大量石英饮食的这些参数值大大超过了对照饮食的参数值。这些结果与来自相同饮食的豚鼠喂养实验的观察结果相当。板球下颌骨的磨损受到所有磨料的影响。值得注意的是,大火山灰和大石英引起最深的，最复杂的病变,类似于豚鼠的观察。这表明了一个普遍的磨损过程，支持微磨损分析适合推断无脊椎动物饮食。
