Table 2.

Concentrations of the plankton captured by the 180 μm WP2 plankton net during the day and at night for depth intervals 30–0, 60–30 and 90–60 m

Taxa	Depth (m)	ind./m3 (day)	ind./m3 (night)	Taxa	Depth (m)	ind./m3 (day)	ind./m3 (night)
Calanus finmarchicus	0−30	50	82	Heterorhabdus norvegicus*	0–30	<1	<1
	30–60	41	148		30−60	<1	6
	60–90	89	–		60–90	4	–
Calanus glacialis	0–30	4	10	Harpacticus chelifer	0–30	9	50
	30–60	31	31		30–60	54	30
	60–90	147	–		60–90	<1	–
Calanus hyperboreus	0–30	<1	1	Harpacticoida spp.	0–30	2	<1
	30–60	<1	<1		30–60	11	<1
	60–90	4	–		60–90	<1
Pseudocalanus spp.	0–30	3,100	10,300	Oithona atlantica	0–30	388	725
	30–60	<1	16,820		30–60	<1	555
	60–90	775	–		60–90	<1	–
Microcalanus spp.	0–30	563	2,300	Oithona similis	0–30	400	825
	30–60	163	1,900		30–60	<1	1,335
	60–90	63	–		60–90	131	–
Metridia lucens*	0–30	3	17	Appendicularia*	0–30	17	15
	30–60	4	18		30–60	3	3
	60–90	6	–		60–90	96	–
Metridia longa*	0–30	<1	<1	Limacina helicina	0–30	2	<1
	30–60	<1	3		30–60	<1	1
	60–90	11	–		60–90	12	–
Acartia longiremis	0–30	175	375	Sagitta elegans	0–30	<1	2
	30–60	<1	385		30–60	5	11
	60–90	<1	–		60–90	12	–
Paraeuchaeta norvegica	0–30	<1	<1	Eukrohnia hamata	0–30	4	30
	30–60	1	<1		30–60	2	21
	60–90	<1	–		60–90	11	–
Diastylis lucifera*	0–30	<1	<1	Thysanoessa longicaudata*	0–30	<1	2
	30–60	1	<1		30–60	3	7
	60–90	<1	–		60–90	2	–
Bradyidius similis	0–30	<1	1	Thysanoessa inermis*	0–30	<1	<1
	30–60	<1	3		30–60	<1	22
	60–90	6	–		60–90	<1	–
Oncaea borealis*	0–30	12	<1
	30–60	51	200
	60–90	<1	–

Asterisks indicate organisms known to be bioluminescent