Table 2. Composition and skew rate in the forward strand of seven species mitogenome. Newly sequenced mitogenomes in this study are noted with an asterisk (*).

		Proportion of nucleotides (%)
Species	Accession no.	A	T	G	C	AT content	AT skew	GC skew
Calidris ruficollis	MG736926	31.85	24.76	13.48	29.83	56.61	0.13	–0.36
Calidris tenuirostris*	MW160419	30.94	24.80	13.83	30.43	55.74	0.11	–0.38
Calidris alpine*	MW168383	31.20	25.18	13.75	29.81	56.38	0.11	–0.37
Calidris alba*	MW168384	31.45	25.08	13.61	29.86	56.53	0.11	–0.37
Calidris subminuta*	MW168385	31.60	24.43	13.40	30.53	56.03	0.13	–0.39
Limicola falcinellus*	MW160420	31.49	24.80	13.58	30.10	56.30	0.12	–0.38
Eurynorhynchus pygmeus	KP742478	31.29	24.85	13.84	30.02	56.14	0.11	–0.37