Reciprocal cross infection of sticklebacks with the diphyllobothriidean cestode Schistocephalus solidus reveals consistent population differences in parasite growth and host resistance

Table 1 Experimental design matrix

	Stickleback origin	NO			DE			NO♀ × DE♂			DE♀ × NO♂
	Stickleback family	A	B	C	D	E	F	G	H	I	J	K	L
S. solidus origin	S. solidus family
DE	P_1	20	20	20	20	20	20	20	-	-	20	-	-
	P_3	20	20	20	20	20	20	-	20	-	-	20	-
	P_5	20	20	20	20	20	20	-	-	20	-	-	20
	Total	180			180			60			60
NO	P_2	20	20	20	20	20	20	20	-	-	20		-
	P_4	20	20	20	20	20	20	-	20	-	-	20	-
	P_6	20	20	20	20	20	20	-	-	20	-	-	20
	Total	180			180			60			60
Control	-	20	20	20	20	20	20	20	20	20	20	20	20
Control	Total	60			60			60			60

Reciprocal infection scheme of 1200 sticklebacks from Norwegian (NO), German (DE), NO-maternal hybrid (NO♀ × DE♂) and DE-maternal hybrid (DE♀ × NO♂) families (three families each, labelled by capital letters A through L) exposed to sympatric and allopatric Schistocephalus solidus families (three families each)

ISSN: 1756-3305