Some Unresolved Issues of Measuring the Efficiency of Pollinators: Experimentally Testing and Assessing the Predictive Power of Different Methods

Table 8

Foraging modes, number of foragers, foraging rates, and pollen transfer efficiency of different flower visitors of bath sponge(Luffa cylindrica).

Parameter	Foraging mode	Visitor species
		Apis florea	Halictus species	Melissodes species	Xylocopa fenestrata
No. of foragers /m^2; (a)	N	1.84±0.35	0.25±0.02	-	- (b)
	P	0.38±0.15	0.15±0.01	0.13±0.01	- (c)
	NP	0.46±0.14	0.28±0.02	0.28±0.03	0.73±0.05 (c)
	N+P+NP	2.68±0.65	0.48±0.05	0.41±0.04	0.73±0.05 (c)
Foraging rate (per minute)(a)	N	nr	nr	-	-
	P	3.6±0.39	3.2±0.37	3.2±0.37	- (c)
	NP	2.4±0.19	1.6±0.28	2.2±0.24	6.5±0.54(c)
(conditional probability)		0.054	0.054	0.054	0.054
PTE (per minute)		0.05	0.09	0.14	0.35

: derived from ♂:♀ ratio = 4138  : 253. Other abbreviations are as in Table 5.