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Li Line transect t t<br />
�� �� Search along along tracks & record<br />
�� Primary effort (position, time, altitude, who)<br />
�� E Environmental i t l conditions diti<br />
�� Species, group size<br />
�� Information to get d perpendicular distance<br />
Strip sampled = 22wL<br />
wL<br />
L = transect length<br />
w = strip width d<br />
w<br />
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r<br />
L