Table 1 Composition of gut contents (%) of different size classes of (a) Mysis mixta and (b) Neomysis integer
From: Ecology of mysid shrimps in the Bornholm Basin (central Baltic Sea)
Month | Size class TL (mm) | n | Empty N (%) | Ident. prey organisms | B. coregoni maritima | Podon sp. | P. acuspes | T. longicornis | C. hamatus | Unident. objects | Detritus, sand, phyto (% of guts) |
|---|---|---|---|---|---|---|---|---|---|---|---|
(a) | |||||||||||
April 2002 | 3–6 | 13 | 7 (54) | 1 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 38.5 |
18–21 | 2 | 2 (100) | 0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
June | 3–6 | 3 | 1 (33) | 5 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 |
7–12 | 5 | 1 (20) | 8 | 22.2 | 0.0 | 0.0 | 55.6 | 11.1 | 11.1 | 20.0 | |
18–21 | 3 | 0 (0) | 38 | 7.7 | 2.6 | 2.6 | 84.6 | 0.0 | 2.6 | 0.0 | |
July | 3–6 | 8 | 6 (75) | 0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100 | 12.5 |
7–12 | 17 | 1 (6) | 82 | 8.0 | 2.3 | 9.2 | 63.2 | 11.5 | 5.7 | 0.0 | |
13–17 | 3 | 0 (0) | 18 | 5.6 | 0.0 | 0.0 | 72.2 | 22.2 | 0.0 | 0.0 | |
End July | 7–12 | 13 | 2 (15) | 103 | 85.6 | 11.5 | 1.9 | 0.0 | 0.0 | 1.0 | 0.0 |
13–17 | 32 | 5 (16) | 325 | 75.2 | 20.0 | 0.3 | 1.8 | 1.2 | 1.5 | 3.1 | |
August | 7–12 | 2 | 0 (0) | 21 | 65.2 | 0.0 | 26.1 | 0.0 | 0.0 | 8.7 | 0.0 |
13–17 | 39 | 1 (3) | 542 | 88.0 | 5.1 | 3.3 | 2.2 | 0.0 | 1.5 | 12.8 | |
18–21 | 2 | 0 (0) | 20 | 95.0 | 0.0 | 5.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
October | 13–17 | 45 | 0 (0) | 415 | 65.8 | 15.9 | 1.9 | 14.0 | 1.0 | 1.4 | 6.7 |
18–21 | 6 | 1 (17) | 51 | 84.3 | 11.8 | 0.0 | 2.0 | 2.0 | 0.0 | 0.0 | |
November | 13–17 | 3 | 0 (0) | 25 | 8.0 | 4.0 | 24.0 | 64.0 | 0.0 | 0.0 | 0.0 |
18–21 | 7 | 0 (0) | 77 | 11.5 | 0.0 | 12.8 | 64.1 | 10.3 | 1.3 | 0.0 | |
January 2003 | 13–17 | 7 | 0 (0) | 28 | 62.1 | 3.4 | 10.3 | 20.7 | 0.0 | 3.4 | 42.9 |
18–21 | 6 | 1 (17) | 31 | 12.9 | 0.0 | 38.7 | 48.4 | 0.0 | 0.0 | 33.3 | |
(b) | |||||||||||
June 2002 | 3–6 | 8 | 8 (100) | 0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
7–12 | 1 | 0 (0) | 2 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | |
October | 3–6 | 28 | 5 (18) | 49 | 74.1 | 9.3 | 0.0 | 7.4 | 0.0 | 9.3 | 14.3 |
7–12 | 12 | 0 (0) | 60 | 90.2 | 3.3 | 1.6 | 3.3 | 0.0 | 1.6 | 8.3 | |
November | 3–6 | 13 | 3 (23) | 28 | 3.2 | 0.0 | 6.5 | 67.7 | 12.9 | 9.7 | 0.0 |
7–12 | 20 | 2 (10) | 117 | 8.3 | 0.0 | 24.8 | 59.5 | 4.1 | 3.3 | 15.0 | |
January 2003 | 3–6 | 9 | 8 (89) | 3 | 0.0 | 0.0 | 33.3 | 66.7 | 0.0 | 0.0 | 0.0 |
7–12 | 14 | 6 (43) | 17 | 0.0 | 15.0 | 40.0 | 30.0 | 0.0 | 15.0 | 21.4 | |
13–17 | 8 | 1 (13) | 23 | 0.0 | 0.0 | 43.5 | 52.2 | 4.3 | 0.0 | 12.5 | |
March | 3–6 | 3 | 1 (33) | 1 | 0.0 | 0.0 | 0.0 | 50.0 | 0.0 | 50.0 | 33.3 |
7–12 | 5 | 2 (40) | 1 | 0.0 | 0.0 | 25.0 | 0.0 | 0.0 | 75.0 | 20.0 | |
13–17 | 3 | 0 (0) | 8 | 12.5 | 0.0 | 37.5 | 50.0 | 0.0 | 0.0 | 0.0 | |