Fahlman Andreas, Borque-Espinosa Alicia, Facchin Federico, Fernandez Diana Ferrero, Caballero Paola Muñoz, Haulena Martin, Rocho-Levine Julie
Research Department, Fundación Oceanogràfic de la Comunitat Valenciana, Valencia, Spain.
Global Diving Research Inc., Ottawa, ON, Canada.
Front Physiol. 2020 Mar 3;11:142. doi: 10.3389/fphys.2020.00142. eCollection 2020.
In the current study, we used breath-by-breath respirometry to evaluate respiratory physiology under voluntary control in a male beluga calf [, body mass range ( ): 151-175 kg], an adult female (estimated = 500-550 kg) and a juvenile male ( = 279 kg) false killer whale () housed in managed care. Our results suggest that the measured breathing frequency ( ) is lower, while tidal volume ( ) is significantly greater as compared with allometric predictions from terrestrial mammals. Including previously published data from adult bottlenose dolphin () beluga, harbor porpoise (), killer whale (), pilot whale (), and gray whale () show that the allometric mass-exponents for and are similar to that for terrestrial mammals ( : 1.00, : -0.20). In addition, our results suggest an allometric relationship for respiratory flow ( ), with a mass-exponent between 0.63 and 0.70, and where the expiratory was an average 30% higher as compared with inspiratory . These data provide enhanced understanding of the respiratory physiology of cetaceans and are useful to provide proxies of lung function to better understand lung health or physiological limitations.
在当前研究中，我们使用逐次呼吸气体测定法，对一头圈养的雄性白鲸幼崽[体重范围（ ）：151 - 175千克]、一头成年雌性白鲸（估计体重 = 500 - 550千克）和一头幼年雄性伪虎鲸（体重 = 279千克）在自主控制下的呼吸生理进行了评估。我们的结果表明，与陆生哺乳动物的异速生长预测相比，所测呼吸频率（ ）较低，而潮气量（ ）显著更大。纳入先前发表的来自成年宽吻海豚（ ）、白鲸、港湾鼠海豚（ ）、虎鲸、领航鲸（ ）和灰鲸（ ）的数据表明， 和 的异速生长质量指数与陆生哺乳动物相似（ ：1.00， ： - 0.20）。此外，我们的结果表明呼吸流量（ ）存在异速生长关系，质量指数在0.63至0.70之间，且呼气 平均比吸气 高30%。这些数据增进了我们对鲸类呼吸生理的理解，有助于提供肺功能指标，以更好地了解肺部健康或生理限制。
