Table 1. Information about the samping sites.

Site locations number (No), date of capture, whether sampling in freshwater (F) or marine (M) habitat, longitude/latitude, and altitude for the studied sticklebacks. The populations are numbered from south to north. One of the populations was sampled twice, first during the spawning season in May (“No 9s”), then in 3–4 months after the end of the spawning season (“No 9a”).

No	Site	Date of capture	M/F	Longitude, Latitude	Altitude (m)
1	Øvre Sundbydam	5–6/6–12	F	59°38,492′N,10°35,239′E	50
2	Engenvannet	14/6–12	F	59°53,754′N, 10°31,880′E	1
3	Vassnesvannet	12/6–12	F	60°03,664′N, 05°22,206′E	4
4	Kvernavannet	11/6–12	F	60°10,006′N, 05°23,696′E	4
5	Myrdalsvannet	14/6–12	F	60°31,423′N, 05°39,859′E	74
6	Nygårdsparken	14/6–12	F	60°38,228′N, 05°32,940′E	2
7	Jonsvannet	19–20/8–12	F	63°21,941′N,10°34,879′E	150
8	Torghatten	12/7–12	F	65°43,08′N, 12°11,282′E	3
9s	Pallvannet	23/5–12	F	67°18,259′N, 14°24,471′E	138
9a	Pallvannet	7/10–12	F	67°18,259′N, 14°24,471′E	138
10	Nedre Vollvann	8–9/6–12	F	67°18,055′N, 14°26,767′E	123
11	Frosktjønna	22/5–12	F	67°18,760′N, 14°37,658′E	70
12	Vatnvatnet	17–20/6–12	F	67°20,030′N, 14°46,460′E	8
13	Nord Valen	26–29/6–12	M	67°25,298′N, 13°54,202′E	1
14	Kalven	23–28/6–12	M	67°25,298′N, 13°54,202′E	1
15	Åsvannet	8–10/7–12	F	68°17,215′N, 16°41,027′E	79
16	Håkøybotn	8/8–12	F	69°37,658′N, 18°43,968′E	2
17	Skarsfjord	31/7–12	F	69°56,769′N, 18°51,621′E	3