Table 2.

Guppy mechanisms

	Feeding rates		Female excretion		Male excretion		Pop excretion	Diet
Effect	14–18 mm	>18mm	NH4	PO4	NH4	PO4	NH4	Invert	Diatom	Detritus
Phenotype	LP	—	HP‡	—	LP	LP	HP†	HP†	LP§	LP‡
Density	LD	LD§	—	HD‡	—	HD	HD*	LD	HD‡	HD
Phenotype × density	—	—	Ord‡	—	Ord	Ord	Nonord*	—	—	—

Codes indicate treatment with the highest mean for the contrast (—, no trend; F, guppies; HD, high density; HP, high predation; LD, low density; LP, low predation; N, no guppies). Interactions are shown as ordinal (Ord) or nonordinal (Non).

*, P < 0.001;^†, P < 0.10;^‡, P < 0.05;^§, P < 0.01.