Table 1 Sampling of ivory gull. N_µsat and N_SNP give the number of sampled individuals used for microsatellites and SNPs analyses, respectively.

Breeding region	Nb pairs estimated	Location	Site	Abbr.	Status	N_µsat.	N_SNP
Greenland	2000–2500^a	National Park	Station Nord	1_StNo	Unknown	81	11
				2_StBr	Breeding	25	17
Norway	1500–2000^b	Svalbard	Svenskoya	3_Sven	Breeding	9	9
			Auga	4_Auga	Breeding	18	18
			Hübnerbreen	5_Hubn	Breeding	7	–
			Freemanbreen	6_Free	Breeding	36	20
Russia	10,500–15,000^c	Franz Josef Land	Nagurskoje	7_Nagu	Unknown	5	–
			Rudolf Island	8_Rudo	Unknown	17	–
			Eva-Liv Island	9_EvLi	Unknown	5	–
		Severnaya Zemlya	Schmidt Island	10_SchI	Unknown	12	–
			Domashny Island	11_Doma	Unknown	23	–
			Komsomalets Island	12_Koms	Unknown	6	–
		Kara Sea Islands	Heiberg Islands	13_Heil	Unknown	4	–
Canada	400^d	Nunavut	Seymour Island	14_SeyI	Breeding	11	–
			Alert (Ellesmere Island)	15_AlEI	Unknown	12	12
Total	14,400–19,900					271	87

^aBoertmann et al. (2020).
^bStrøm et al. (2020).
^cGavrilo and Martynova (2017).
^dEnvironment Canada (2014).
Bold values on the bottom of the table just higlight the sum of samples analysed.

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