Table 1.

Biometric data of female eels at Maretarium, Kotka, Finland.

		BL	BW	K	BGI	EI	PFI	GSI	HSI	ISI	CSI
matured eel
fresh			3360					47.0
defrosted		112	2587	0.184	0.271	24.9	4.89	31.2	2.05	0.232	0.193
live eels		111	3036	0.222	0.241	21.2	4.85	<2
		102	2680	0.253	0.223	18.1	5.07	1.6
		92	1707	0.219	0.215	27.2	5.78	2.0
		115	4165	0.274	0.212	18.2	4.37	<2
		94	1773	0.213	0.210	24.4	5.21	1.0
		104	2285	0.203	0.209	16.7	5.63	1.5
		104	2418	0.215	0.208	18.7	4.79	1.0
		104	2090	0.186	0.198	14.2	4.83	1.7
		114	2656	0.179	0.195	20.2	4.30	1.3
		110	2586	0.194	0.194	20.8	4.30	0.9
		117	2717	0.170	0.190	19.7	4.19	1.6
	av	106	2556	0.212	0.208	20.0	4.85	1.4
	sd	8	672	0.031	0.015	3.6	0.54	0.4

The fresh carcass of a mature eel was weighed and GSI was estimated by compensating for weight loss (see text). Other data from the mature eel were collected from the defrosted carcass. Data from eleven live eels are ordered by BGI, under the assumption that the biggest belly would indicate most advanced gonadal development. GSI values of two eels could not accurately be determined by ultrasound but were smaller than 2. All live eels were still previtellogenic but the eyes were very large. BL = body length; BW = body weight; K = Fulton’s condition factor; BGI = body girth index; EI = eye index; PFI = pectoral fin index; GSI = gonadosomatic index; HSI = hepatosomatic index; ISI = intestinal somatic index; CSI = cardiac somatic index.