Long-Term Relationships between the Marine Environment, Krill and Salps in the Southern Ocean

Table 2

Mean abundance of Antarctic krill and salps in the study area averaged for January to March. Source: KRILLBASE [8]. N: number of stations.

Field season	Antarctic krill		Salps
	N	ind.m^-2	N	ind.m^-2
1976	113	162.4	113	494.6
1977	—	—	—	—
1978	217	14.3	217	1.0
1979	—	—	—	—
1980	8	2.5	—	—
1981	190	8.9	190	7.5
1982	175	33.2	175	1.4
1983	—	—	—	—
1984	167	26.3	17	73.3
1985	244	17.5	216	7.5
1986	—	—	—	—
1987	—	—	—	—
1988	130	48.6	—	—
1989	4	35.6	26	499.9
1990	256	3.5	182	64.0
1991	49	1.7	30	4.2
1992	2	0	2	0
1993	168	7.4	—	—
1994	190	3.4	23	115.9
1995	179	1.6	15	37.6
1996	262	19.0	80	2.2
1997	124	6.2	123	53.1
1998	277	23.8	277	96.7
1999	163	2.2	163	29.4
2000	125	8.0	125	116.9
2001	291	19.5	235	63.8
2002	74	1.9	74	15.7
2003	67	2.2	67	4.2