Table 2 The total number of bryozoan colonies collected per river in each sampling trip according to different categories (and the numbers collected from trees 1, 2, and 3). Colony categories are: alive but not producing statoblasts (- stats); alive and producing statoblasts (+ stats); dead with no statoblasts (- stats); dead with mature statoblasts (+ stats). The last four columns provide data for the number (and percentage) of uninfected, covertly and overtly-infected colonies that were identified by dissection and the overtly-infected colonies’ respective sac number. See Methods for further details on sampling to determine infection status
From: Persistence, impacts and environmental drivers of covert infections in invertebrate hosts
River | Sampling trip | Sampling date | Alive (- stats) | Alive (+ stats) | Dead (- stats) | Dead (+ stats) | Covertly-infected | Uninfected | Overtly-infected | Sac number |
|---|---|---|---|---|---|---|---|---|---|---|
Avon | 1 | 20/10/2011 | 143 (48, 35, 60) | 147 (50, 60, 37) | 1 (0, 1, 0) | 0 | 6 (19%), 8 (25%), 8 (26%) | 25 (81%), 24 (75%), 22 (71%) | 0 | 0 |
2 | 05/12/2011 | 101 (34, 21, 46) | 53 (29, 17, 7) | 6 (3, 2, 1) | 3 (1, 1, 1) | 25 (53%), 25 (68%), 29 (81%) | 22 (47%), 12 (32%), 7 (19%) | 0 | 0 | |
3 | 19/01/2012 | 14 (3, 0, 11) | 8 (0, 2, 6) | 4 (1, 0, 3) | 3 (2, 0, 1) | 3 (60%), 2 (100%), 14 (78%) | 2 (40%), 0, 4 (22%) | 0 | 0 | |
4 | 05/03/2012 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
5 | 18/04/2012 | 242 (94, 77, 71) | 1 (1, 0, 0) | 2 (0, 0, 2) | 0 | 13 (41%), 8 (25%), 10 (31%) | 19 (59%), 24 (75%), 22 (69%) | 0 | 0 | |
6 | 11/06/2012 | 214 (72, 74, 68) | 75 (23, 24, 28) | 1 (0, 0, 1) | 3 (3, 0, 0) | 11 (34%), 20 (59%), 16 (50%) | 21 (66%), 14 (41%), 16 (50%) | 0, 0, 1 (1%) | 0, 0, 2 | |
7 | 18/07/2012 | 227 (81, 81, 65) | 51 (11, 11, 29) | 4 (0, 1, 3) | 1 (0, 0, 1) | 14 (44%), 14 (44%), 12 (39%) | 18 (56%), 18 (56%), 19 (61%) | 0, 1 (1%), 1 (1%) | 0, 1, 2 | |
8 | 29/08/2012 | 221 (80, 72, 69) | 54 (17, 9, 28) | 7 (3, 3, 1) | 2 (0, 2, 0) | 20 (49%), 11 (31%), 42 (76%) | 21 (51%), 24 (69%), 13 (24%) | 0, 1 (1%), 2 (2%) | 0, 5, 6, 11 | |
Dun | 1 | 25/10/2011 | 166 (73, 35, 58) | 57 (22, 8, 27) | 15 (3, 4, 8) | 3 (0, 1, 2) | 22 (59%), 14 (40%), 15 (52%) | 15 (41%), 21 (60%), 14 (48%) | 0, 0, 1 (1%) | 0, 0, 14 |
2 | 08/12/2011 | 129 (56, 24, 49) | 19 (8, 9, 2) | 51 (30, 10, 11) | 9 (3, 4, 2) | 39 (89%), 32 (91%), 35 (85%) | 5 (11%), 3 (9%), 6 (15%) | 1 (1%), 2 (5%), 0 | 2, 2, 1, 0 | |
3 | 23/01/2012 | 96 (37, 26, 33) | 9 (2, 3, 4) | 48 (32, 7, 9) | 10 (5, 3, 2) | 39 (89%), 32 (100%), 35 (90%) | 5 (11%), 0, 4 (10%) | 0 | 0 | |
4 | 08/03/2012 | 120 (50, 35, 35) | 6 (1, 4, 1) | 37 (13, 10, 14) | 0 | 23 (72%), 32 (100%), 24 (75%) | 9 (28%), 0, 8 (25%) | 0 | 0 | |
5 | 23/04/2012 | 236 (92, 48, 96) | 3 (3, 0, 0) | 8 (5, 0, 3) | 0 | 6 (19%), 20 (65%), 9 (28%) | 26 (81%), 11 (35%), 23 (72%) | 1 (1%), 2 (4%), 0 | 5, 3, 6, 0 | |
6 | 06/06/2012 | 243 (99, 44, 100) | 0 | 5 (0, 5, 0) | 0 | 22 (69%), 28 (88%), 25 (78%) | 10 (31%), 4 (13%), 7 (22%) | 1 (1%), 0, 0 | 1, 0, 0 | |
7 | 23/07/12 | 215 (88, 45, 82) | 16 (5, 1, 10) | 11 (6, 2, 3) | 0 | 9 (28%), 15 (48%), 10 (32%) | 23 (72%), 16 (52%), 21 (68%) | 3 (3%), 1 (2%), 0 | 26, 4, 1, 25, 0 | |
8 | 05/09/2012 | 189 (77, 42, 70) | 33 (7, 7, 19) | 16 (8, 1, 7) | 3 (2, 0, 1) | 23 (64%), 27 (68%), 33 (75%) | 13 (36%), 13 (33%), 11 (25%) | 3 (3%), 1 (2%), 1 (1%) | 1, 4, 5, 11, 9 | |
Itchen | 1 | 15/10/2012 | 239 (83, 83, 73) | 1 (1, 0, 0) | 20 (8, 10, 2) | 0 | 23 (72%), 26 (81%), 21 (66%) | 9 (28%), 6 (19%), 11 (34%) | 0, 0, 1 (1%) | 0, 0, 2 |
2 | 03/12/2012 | 258 (79, 88, 91) | 1 (0, 1, 0) | 32 (19, 5, 8) | 0 | 19 (59%), 15 (47%), 16 (50%) | 13 (41%), 17 (53%), 16 (50%) | 0, 1 (1%), 1 (1%) | 0, 2, 1 | |
3 | 14/01/2013 | 87 (84, 1, 2) | 0 | 13 (13, 0, 0) | 0 | 28 (33%), 0, 1 (50%) | 56 (67%), 1 (100%), 1 (50%) | 0 | 0 | |
4 | 25/02/2013 | 26 (26, 0, 0) | 0 | 20 (19, 1, 0) | 1 (1, 0, 0) | 12 (44%), 0, 0 | 15 (56%), 0, 0 | 0 | 0 | |
5 | 03/04/2013 | 11 (0, 0, 11) | 0 | 3 (0, 0, 3) | 0 | 0, 0, 3 (27%) | 0, 0, 8 (73%) | 0 | 0 | |
6 | 20/05/2013 | 191 (47, 97, 47) | 0 | 6 (1, 2, 3) | 0 | 1 (3%), 8 (25%), 25 (78%) | 31 (97%), 24 (75%), 7 (22%) | 0 | 0 | |
7 | 01/07/2013 | 222 (97, 97, 28) | 0 | 9 (2, 3, 4) | 0 | 11 (34%), 14 (44%), 25 (89%) | 21 (66%), 18 (56%), 3 (11%) | 0 | 0 | |
8 | 12/08/2013 | 296 (97, 100, 99) | 4 (3, 0, 1) | 0 | 0 | 14 (44%), 18 (56%), 13 (41%) | 18 (56%), 14 (44%), 19 | 1 (1%), 0, 1 (1%) | 1, 0, 12 |