Synchronism of naupliar development of Sacculina carcini Thompson, 1836 (Pancrustacea, Rhizocephala) revealed by precise monitoring

Table 2 Dimensions (µm) of the naupliar instars from single sex broods of Sacculina carcini Thompson, 1836

Instar	Length, µm (mean ± SD)		S	Width, µm (mean ± SD)		S
Instar	Female	Male	S	Female	Male	S
Larva-body
N2	250.8 ± 9.7	278.0 ± 6.6	***	115.4 ± 5.3	127.2 ± 3.4	***
N3	272.6 ± 11.6	303.6 ± 9.8	***	121.5 ± 5.9	132.2 ± 5.2	***
N4	285.1 ± 8.2	312.2 ± 8.2	***	126.6 ± 8.9	142.8 ± 2.8	***
N5	285.9 ± 23.3	315.0 ± 12.7	***	136.5 ± 11.5	144.4 ± 6.6	***
Cypris	238.4 ± 5.1^a	276.5 ± 6.9^b	***	–	–
Larva-Furca
N2	37.8 ± 3.1	43.0 ± 5.0	**	22.0 ± 1.6	23.7 ± 1.4	***
N3	48.4 ± 6.5	55.1 ± 5.6	***	23.0 ± 1.8	26.8 ± 1.9	***
N4	48.3 ± 7.0	47.2 ± 7.0	p = 0.478	24.3 ± 2.2	27.6 ± 2.6	***
N5	38.4 ± 6.8	39.1 ± 7.5	p = 0.8344	21.8 ± 1.8	20.5 ± 1.9	**

Single-sex broods, retrospectively sexed, were used. N1 were not found in naturally released broods (n = 25 for each instar N2–N5)
N2–N5 naupliar instars 2–5, p p value, *** p < 0.0001; ** p < 0.001, S significant, SD standard deviation
^a(n = 31)
^b(n = 49)

ISSN: 1438-3888