Table 5

The thrust force increment on the calf due to drafting

Case

X/Xmax

K

X

X/Xreq


H1

0.82

3.99

11.7

0.62

H2

0.71

3.66

3.1

0.18

DL

0.98

3.65

8.2

0.48

DR

0.99

7.39

20.5

0.58

A2

0.9

4.62

7.3

0.33

A3

0.02

7.94

0.2

0.005

A4

1

4.26

11.5

0.57

A5

0.98

4.9

7.7

0.33

A6

0.96

4.61

4.9

0.22

BR

0.94

7.94

15.3

0.41


X/Xmax is the fraction of the maximal thrust possible, obtained from inserting the value of ΞΎ/L2 from Table 4 into Figure 5c and following the vertical line. K is calculated from equation (5). The thrust increment X (in newtons) is calculated assuming a swimming speed of 2.4 m/sec, and the X/Xreq represents the thrust transferred from the mother as a fraction of the total thrust required of the calf.

Weihs Journal of Biology 2004 3:8   doi:10.1186/jbiol2

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