Technical University of Denmark, National Institute of Aquatic Resources, North Sea Science Park, DK-9850 Hirtshals, Denmark.
J Fish Biol. 2012 Jan;80(1):166-80. doi: 10.1111/j.1095-8649.2011.03160.x.
The simple surface abstraction of the cylinder model (each prey as well as the total stomach contents is considered a cylinder that is gradually reduced by successive peeling off its curved side) was challenged by data on evacuation of a meal composed of three sandeels Ammodytes tobianus and a dab Limanda limanda fed to Atlantic cod Gadus morhua. While the body shape of A. tobianus comes close to that of a cylinder, the flatfish L. limanda takes a discoid form. As opposed to a modified form of the cylinder model, where the contrasting geometries of the fish prey were implemented, the simple, original cylinder model held the potential to predict evacuation of the individual prey types as well as the total stomach contents. Thus, the present study adds significantly to the increasing evidence that points to the generic nature of the model and its implicit square root function. Also, the present study corroborated a basic assumption that the variability of evacuation data not accounted for by the cylinder model primarily can be ascribed to the intraspecific variation in gastric performance of the predator.
圆柱模型的简单表面抽象（每个猎物以及总胃内容物都被视为一个逐渐通过连续剥离其曲面而减小的圆柱体）受到了由三种拟沙丁鱼（Ammodytes tobianus）和一条鲽鱼（Limanda limanda）组成的一餐的排空数据的挑战，这些食物被投喂给大西洋鳕鱼（Gadus morhua）。虽然 A. tobianus 的体型接近圆柱体，但比目鱼 L. limanda 呈盘状。与实施鱼类猎物对比几何形状的圆柱模型的修正形式不同，简单的原始圆柱模型有可能预测单个猎物类型以及总胃内容物的排空。因此，本研究极大地增加了越来越多的证据，这些证据表明该模型的普遍性及其隐含的平方根函数。此外，本研究证实了一个基本假设，即无法用圆柱模型解释的排空数据的可变性主要可以归因于捕食者胃功能的种内变异。
