(Table 1) Morphometrics of narwhal (Monodon monoceros) fluke planforms

In this study, we compared the fluke geometries of male and female narwhals, which may be associated with hydrodynamic effects. Computerized tomography (CT) scanning was used to obtain data for analyses of the three-dimensional geometry of the flukes. The flukes from four narwhals (two males and two females) were obtained from aboriginal hunters in the vicinity of Broughton Island, Canada. The body lengths of the animals ranged from 2.98 to 3.60 m. Both males had erupted, upper left tusks. Standard body measurements were made including the span of the fluke (i.e., linear distance between fluke tips).本研究针对雄性与雌性独角鲸的尾鳍几何形态展开对比分析，该形态或与流体动力学效应存在关联。本研究采用计算机断层扫描（CT）技术采集数据，以解析尾鳍的三维几何特征。研究从加拿大布劳顿岛周边的原住民猎手处获取了4头独角鲸的尾鳍样本，其中雄性、雌性个体各2头。受试个体的体长区间为2.98至3.60米。两头雄性个体均带有已萌出的左上獠牙。研究人员对受试个体开展了标准化身体测量，测量项包含尾鳍跨度（即尾鳍两尖端间的直线距离）。