Tawni B. Riepe, Zachary E. Hooley‐Underwood, Megan Johnson
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引用次数: 0
摘要
随着全球气温变化、水坝和用水量的增加导致溪流水温升高,本地鱼类面临着不确定的未来。我们的研究确定了火绒嘴吸盘鱼幼体的热极限。通过在三种适应温度(11 °C、16 °C和22 °C)下培育吸盘鱼卵,我们利用临界最高热量(CTMax)和最低热量(CTMin)试验确定了幼体存活的理想条件和温度耐受范围。幼虫在16 °C时存活率最高。我们的数据表明,在三个适应温度范围内,幼虫可在 6.9 °C 至 26.4 °C 的静态温度下存活。超过 34.8 °C的上限温度和 6.3 °C的下限温度,这些鱼类可能无法适应。虽然火绒嘴吸盘鱼能承受高温,但即使温度稍有下降也会造成危害。通过确定火绒嘴吸盘鱼的温度极限,我们可以做出明智的管理决策,保护这种沙漠鱼类的种群。
Thermal Tolerance of Larval Flannelmouth Sucker Catostomus latipinnis Acclimated to Three Temperatures
As water temperatures rise in streams due to global temperature variations, dams, and increased water usage, native fish species face uncertain futures. Our study defines the thermal limits of flannelmouth sucker larvae. By raising sucker eggs at three acclimation temperatures (11 °C, 16 °C, and 22 °C), we defined ideal conditions for larval survival and the temperature tolerance range using critical thermal maximum (CTMax) and minimum (CTMin) trials. Larvae survived best at 16 °C. Within our three acclimation temperatures, our data suggest that larvae can survive static temperatures between 6.9 °C and 26.4 °C. Beyond an upper temperature of 34.8 °C and a lower temperature of 6.3 °C, these fish may fail to adapt. While flannelmouth suckers withstand high temperatures, even small temperature decreases prove detrimental. By defining the temperature limits of the flannelmouth sucker, we can make informed management decisions to preserve the populations of this desert fish.