ABSTRACT

This study aimed to analyze the accuracy of three currently used methods to quantify the volume of the prey of amphibians using the volumetric displacement method as a comparative parameter. The compared methods were the formula for semi-spherical bodies, which measures the height, length, and width of the prey; the formula for ellipsoid bodies, which estimates the height of the prey; and the parallelepiped formula, where the prey is macerated at a height of 1 mm. After the identification of the prey to the taxonomic level of order, the volume of consumed prey was measured using the three methods. The values obtained with the formula for semi-spherical and ellipsoid bodies had a greater difference from the reference values (volumetric displacement method). Regarding the values obtained with the parallelepiped formula, they were similar and had a significant correlation with the reference values. The presented results demonstrate that the parallelepiped formula, using prey maceration, is a more accurate method for estimating prey volume than the semi-spherical and ellipsoid formulas.

摘要

本研究旨在分析目前使用的三种使用体积位移法作为比较参数来量化两栖动物猎物体积的方法的准确性。比较的方法是半球体公式，测量猎物的高、长、宽；椭球体公式，用于估计猎物的高度；和平行六面体公式，其中猎物被浸渍在 1 毫米的高度。在将猎物鉴定到分类学级别后，使用三种方法测量消耗的猎物的体积。用半球形和椭球体公式得到的值与参考值（体积位移法）有较大差异。关于使用平行六面体公式获得的值，它们相似并且与参考值有显着相关性。所呈现的结果表明，与半球形和椭圆体公式相比，使用猎物浸渍的平行六面体公式是一种更准确的估计猎物体积的方法。