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Migratory Pollinators Program

Table 2.
Data necessary for calculating the energetic cost of spring migration in a pregnant female lesser long-nosed bat.  Sources of data are cited in the text except as noted below.

Parameter                                                    Value
Fat-free wet mass                                         24.5 g
Fat deposited prior to migration                      ca. 3 g
Typical flight speed                                          40 kph
Resting metabolism*                                         2.0 ml O2 per g-h
Cost of flight relative to resting metabolism**        20X
Energy from one cactus flower visit                      0.45 kJ

*
McNab (1989).

** Winter and von Helversoen (1998).

 

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