The gastric evacuation rates of Spiny Dogfish Squalus acanthias, Summer Flounder Paralichthys dentatus and Goosefish Lophius americanus held at two different temperatures were determined in the laboratory by gastric lavage. Overall, exponential models provided the best fit for the evacuation rates. The Spiny Dogfish, an elasmobranch, evacuated more slowly than the Summer Flounder (a teleost) but the Goosefish, also a teleost, had the slowest evacuation rate of the three species. The Goosefish evacuation rate was nearly ten times slower than that of Summer Flounder. Evacuation was more rapid at the higher temperature tested in all three species. At 15°C, Summer Flounder had the highest average evacuation rate (0.094 exponential rate of decline), followed by Spiny Dogfish (0.063 exponential rate of decline), and then Goosefish (0.018 exponential rate of decline). Among the three species, activity levels and feeding behaviors are also very different, contributing to differences in evacuation rate. Species-specific parameters of evacuation rate should be considered to better inform multispecies and ecosystem models and to more accurately estimate consumption and prey removal rather than using broad taxonomic groupings as in current common practice.

中文翻译：

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多刺角鲨、鹅鱼和夏季比目鱼的胃排空率：对多物种模型的影响

刺角鲨 Squalus acanthias , Summer Flounder Paralichthys dentatus和 Goosefish Lophius americanus的胃排空率在实验室中通过洗胃测定在两种不同温度下保持的温度。总的来说，指数模型最适合疏散率。刺角鲨是一种弹鳃类动物，其疏散速度比夏比目鱼（一种硬骨鱼）慢，但鹅鱼（也是一种硬骨鱼）的疏散速度是这三个物种中最慢的。鹅鱼的撤离速度比夏比目鱼慢了近十倍。在所有三个物种中测试的较高温度下，疏散速度更快。在 15°C 时，夏比目鱼的平均疏散率最高（0.094 指数下降率），其次是多刺角鲨（0.063 指数下降率），然后是鹅鱼（0.018 指数下降率）。三个物种之间，活动水平和摄食行为也有很大不同，导致疏散率的差异。应考虑特定物种的疏散率参数，以更好地为多物种和生态系统模型提供信息，并更准确地估计消耗和猎物的清除，而不是像当前通常的做法那样使用广泛的分类分组。