Table 1. Average numbers (±S.D.) of P elements estimated by TEMP, RetroSeq and normalized coverage in isofemale strains from three worldwide populations of D. melanogaster.

Columns labeled raw and filtered represent output generated by each method before or after default filtering by McClintock, respectively, and columns labeled weighted represent the sum of the number of insertions weighted by sample frequency (see Materials and Methods for details).

Population	# strains	TEMP raw	TEMP filtered	TEMP raw weighted	TEMP filtered weighted	RetroSeq raw	RetroSeq filtered	Coverage
N. America	15	159.3 ± 48.5	68.7 ± 8.9	30.7 ± 4.1	26.4 ± 2.9	83.4 ± 15.7	77.0 ± 13.8	22.4 ± 2.0
Europe	20	247.3 ± 78.5	106.7 ± 13.9	43.3 ± 6.0	35.9 ± 4.3	127.0 ± 22.1	116.5 ± 18.3	34.4 ± 4.6
Africa	15	233.7 ± 60.1	108.3 ± 20.2	45.8 ± 6.2	39.9 ± 5.0	131.9 ± 29.3	120.5 ± 22.2	32.9 ± 4.4