Distribution and reproductive biology of the little cuttlefish Sepiola atlantica (Cephalopoda: Sepiolidae) around Anglesey, North Wales

Table 1 Mean dorsal mantle length (DML) and wet weight (Ww) at each maturity stage for juvenile, male and female Sepiola atlantica collected from Y Foryd Bay and Traeth Penrhos

Maturity stage	N	Mean ♂ DML (mm) ± SD	N	Mean ♀ DML (mm) ± SD	Significant difference between ♂ & ♀
DML Y Foryd Bay
II	19	12.97 ± 1.4	7	14.02 ± 1.8	Not significant***
III	8	14.81 ± 0.9	31	16.22 ± 1.4	Significant**
IV	49	16.13 ± 1.7	38	19.68 ± 1.6	Significant*
DML Traeth Penrhos
II	14	12.70 ± 1.2	7	13.45 ± 2.1	Not significant**
III	2	14.35 ± 0.07	6	16.33 ± 1.2	n/a
IV	8	15.63 ± 1.7	8	18.50 ± 1.3	Significant**

Maturity stage	N	Mean ♂ Ww (g) ± SD	N	Mean ♀ Ww (g) ± SD	Significant difference between ♂ & ♀
Ww Y Foryd Bay
II	19	0.81 ± 0.1	7	0.88 ± 0.1	Not significant**
III	8	1.19 ± 0.2	6	1.38 ± 0.3	Not significant**
IV	49	1.58 ± 0.4	38	2.15 ± 0.5	Significant*
Ww Traeth Penrhos
II	14	0.75 ± 0.1	7	0.93 ± 0.3	Not significant**
III	2	0.88 ± .09	6	1.33 ± 0.1	n/a
IV	8	1.54 ± 0.6	8	1.84 ± 0.5	Not significant**

Asterisks denote the statistical tests used to determine significance at P < 0.05. * One-way ANOVA. ** Student’s t test, *** Mood’s median test
n/a Not applicable

ISSN: 1438-3888