...Robert A. MacArthur; Gillian L. Weseen; Kevin L. Campbell SUMMARY We tested the hypothesis that the body oxygen stores, aerobic dive limit(ADL) and dive performance of muskrats can be enhanced by dive-conditioning in a laboratory setting. We compared several key variables in 12 muskrats trained...

...Pierre E. Signore; David R. Jones ABSTRACT Neural control of the cardiac responses to exercise in air (running) and under water (diving) was studied in the muskrat (Ondatra zibethicus) by means of acute pharmacological blockade with the muscarinic blocker atropine and the β-adrenergic blocker...

...Pierre E. Signore; David R. Jones ABSTRACT Neural control of free and forced diving bradycardia and peripheral resistance was studied in the muskrat (Ondatra zibethicus) by means of acute pharmacological blockade with the muscarinic blocker atropine, the α -adrenergic blocker phentolamine and the β...

...Daniel R. Streeby; Thomas A. McKean ABSTRACT Muskrats (Ondontra zibethicus) are common freshwater diving mammals exhibiting a bradycardia with both forced and voluntary diving. This bradycardia is mediated by vagal innervation; however, if hypoxia is present there may be local factors that also...

..., the muskrat (Ondatra zibethicus), is able to survive ischemia and hypoxia better than the heart of a similarly sized non-diving rodent, the guinea pig (McKean and Landon, 1982 ; McKean, 1984). We hypothesized that the K ATP channel might be involved in the explanation for this species difference. 25 5...

...TA McKean 19 10 1989 © 1990 by Company of Biologists 1990 muskrat ATPase myosin heart Muskrats (Ondatra zibethicus) are among the most common freshwater diving mammals in North America. They have a well-developed diving response that occurs upon either forced...

...F. E. Fish ABSTRACT The surface swimming of muskrats (Ondatra zibethicus Linnaeus) was studied by forcing individual animals to swim against a constant water current, of velocity ranging from 0·2 to 0·75 ms −1 , in a recirculating water channel. Lateral and ventral views of the swimming muskrats...