中文内容为资料集译写。每条说明所依据的摘要或正文范围。 / Chinese text is prepared for this collection. Summary evidence is identified for each entry.
Nature全文 PDF双髻鲨头翼的流体动力学评估
A hydrodynamics assessment of the hammerhead shark cephalofoil
Scientific reports · 2020
依据索引收录的作者摘要概括。
Summary based on the indexed author abstract.
主要发现 Key findings
流体模拟比较八种双髻鲨与三种典型头型鲨鱼，显示头翼提高机动性，但在平行来流时无显著升力，并增加阻力。
Fluid simulations comparing eight hammerheads and three typical sharks indicate improved manoeuvrability but no substantial lift with the cephalofoil parallel to flow, together with increased drag.
结论 Conclusions
头翼的优势伴随运动能耗代价，不能简单视为高效产生升力的机翼。
Cephalofoil benefits carry energetic costs and should not be reduced to an efficient lift-producing wing analogy.
Science仅摘要 Abstract only深潜路氏双髻鲨以屏息方式调节体温
"Breath holding" as a thermoregulation strategy in the deep-diving scalloped hammerhead shark.
Science (New York, N.Y.) · 2023
摘要解读依据已查看的索引作者摘要；如已保存全文，可用于进一步阅读。
Summary based on the inspected indexed author abstract; archived full text, when available, is provided for further reading.
主要发现 Key findings
生物记录仪显示，路氏双髻鲨从温暖表层下潜至超过八百米的寒冷水域时，仍保持较高肌肉温度；快速降温发生于上升后期。传热模型提示其暂时抑制了经鳃发生的对流换热。
Biologgers recorded scalloped hammerheads maintaining warm muscle temperatures during dives from warm surface water to depths beyond 800 metres in much colder water. Rapid cooling began late in ascent, and heat-transfer modeling suggested that gill-mediated convective heat exchange had been temporarily suppressed.
结论 Conclusions
推断的鳃功能抑制与海洋哺乳动物屏息潜水类似，可能帮助深潜觅食时保温；鳃闭合属于机制解释，并非直接观察结果。
The inferred suppression of gill function resembles breath-hold diving in marine mammals and may conserve heat during deep foraging. Gill closure is a mechanistic interpretation rather than a direct observation.