Table 3.

Catch rate of D. bifasciata in seven locations within Japan during early-mid October between 1973 and 1984. Catch rate is given as mean per trap per day, with number of traps and number of days trapped in parentheses. Proportion of catch that was bifasciata is given across all traps and days, with total Drosophila catch in parentheses.

Island	Location		bifasciata caught per day/ per trap (traps, days)	bifasciata as proportion of catch (n)
Hokkaido	Misumai	42°57' N 141°16' E	4.67 (5, 14)	13.6% (2407)
	Koryukozan	42°51' N 141°17' E	8.38 (5, 17)	15.94% (4458)
	Tomakomai	42°43' N 141°36' E	6.48 (6, 14)	2.01% (27033)
	Matsumae	41°26' N 140°08' E	2.54 (8, 7)	2.48% (5726)
Honshu	Mimmaya	41°10' N 140°24' E	0.21 (8, 7)	0.51% (2342)
	Morioka	39°15' N 141°10' E	0.79 (4, 7)	0.82% (2683)
	Kiyosumi	35°10' N 140°10' E	0.00 (4, 7)	0 (903)