. 2015 Oct 30;5:15909. doi: 10.1038/srep15909

Table 2. Fibre size data (CSA and LD) for each species from two groups with different dive behaviour; shallow (D. delphis, n = 4; S. coruleoalba, n = 2; and S. frontalis, n = 6) versus deep-diving species (K. breviceps, n = 2; M. europaeus, n = 3; and Z. cavirostris, n = 5^*).

Group	CSA (μ²)		LD (μ)
Group	Type I	Type II	Type I	Type II	II/I
Shallow-diving	661,94 ± 129,91	1709,36 ± 124,29	33,02 ± 1,35^*	55,84 ± 6,26^**	1,7
D. delphis	640,15 ± 254,52	1586,48 ± 606,47	31,58 ± 4,11	50,83 ± 2,10	1,6
S. coeruleoalba	544,30 ± 62,82	1706,59 ± 4,39	34,24 ± 1,36	62,85 ± 0,48	1,83
S. frontalis	801,37 ± 394,39	1835,02 ± 580,52	33,24 ± 5,08	53,83 ± 5,62	1,62
Deep-diving	2242,19 ± 1721,19	4690,46 ± 2284,00	51,93 ± 22,67^*	83.95 ± 18,97^**	1,61
K. breviceps	4033,98 ± 1020,81	3491,08 ± 470,78	74,39 ± 0,77	72,62 ± 5,65	0,97
M. europaeus	601,58 ± 319,46	3256,00 ± 1115,14	29,08 ± 3,33	73,38 ± 8,03	2,52
Z. cavirostris	2091,00 ± 1444,68	7324,31 ± 2877,30	52,35 ± 11,87	105,84 ± 17,43	2,02

Values are expressed as mean (±s.d.). An extra specimen was added within the Z. cavirostris species in the morphometric analysis for the LD in order to homogenise the number of both groups. The Mann-Whitney U test for two independent-samples revealed a highly significant difference in the mean LD of the type I^* (P = 0.019) and type II^** (P = 0.000) myofibers when shallow- and deep-diving groups were compared.

Table 2. Fibre size data (CSA and LD) for each species from two groups with different dive behaviour; shallow (D. delphis, n = 4; S. coruleoalba, n = 2; and S. frontalis, n = 6) versus deep-diving species (K. breviceps, n = 2; M. europaeus, n = 3; and Z. cavirostris, n = 5*).

Table 2. Fibre size data (CSA and LD) for each species from two groups with different dive behaviour; shallow (D. delphis, n = 4; S. coruleoalba, n = 2; and S. frontalis, n = 6) versus deep-diving species (K. breviceps, n = 2; M. europaeus, n = 3; and Z. cavirostris, n = 5^*).