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Body oxygen stores, aerobic dive limits and diving behaviour of the star-nosed mole (Condylura cristata) and comparisons with non-aquatic talpids

Ian W. McIntyre, Kevin L. Campbell and Robert A. MacArthur^*

Department of Zoology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2

View larger version (19K): [in a new window]   Fig. 1. Frequency distribution of all voluntary dive times recorded for 18 star-nosed moles tested in water at 3–30°C. Vertical dashed lines denote behavioural and calculated aerobic dive limits (ADL; see Materials and methods for details).

View larger version (19K): [in a new window]   Fig. 2. The relationship between inter-dive surface period and the length of the preceding dive in 15 freely diving star-nosed moles tested in water at 3–30°C. D:S ratio, dive:surface ratio.

View larger version (16K): [in a new window]   Fig. 3. Relationship between the mean O2 of star-nosed moles in water (N=11 animals) and (A) the percentage of time spent diving and (B) the dive frequency during 8- and 10-min immersion trials in water at 30°C. Dashed lines denote the mean resting O2 of the same individuals in air (2.56 ml O2 g–1 h–1).

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