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Table 1 Egg mass deposition by B. truncatus in the presence of L. varicus snails

From: Potential of Lanistes varicus in limiting the population of Bulinus truncatus

Week Treatment 1 Treatment 2 Treatment 3 Treatment 4
No. of live B. truncatus snails No. of egg masses (density)a No. of live Lv:Bt No. of egg masses (density)a No. of live Lv:Bt No. of egg masses (density)a No. of live Lv:Bt No. of egg masses (density)a
1 40 724 (18.1) 30:10 2 (0.2) 20:20 3 (0.2) 10:30 2 (0.2)
2 40 647 (16.2) 30:10 0 (0.0) 20:20 3 (0.2) 10:28 4 (0.5)
3 40 819 (20.5) 30:10 0 (0.0) 20:20 3 (0.2) 10:28 4 (0.1)
4 38 695 (18.3) 29:9 1 (0.1) 20:19 0 (0.0) 10: 28 4 (0.2)
5 38 611 (16.1) 29:8 1 (0.1) 20:19 1 (0.1) 10:26 7 (0.3)
6 38 652 (17.2) 29:8 0 (0.0) 20:19 0 (0.0) 10:26 3 (0.3)
7 38 595 (15.7) 29:7 0 (0.0) 20:15 2 (0.1) 10:26 2 (0.1)
8 38 407 (10.7) 29:7 2 (0.3) 20:13 8 (0.6) 10:26 1 (0.3)
9 37 462 (12.5) 28:5 0 (0.0) 20:10 0 (0.0) 10:24 0 (0.4)
10 37 418 (11.3) 28:5 0 (0.0) 20:8 2 (0.3) 10:23 9 (0.3)
11 35 483 (13.8) 28:3 0 (0.0) 20:7 0 (0.0) 10:20 84 (4.2)
12 34 420 (12.4) 28:3 0 (0.0) 20:7 2 (0.3) 10:20 13 (0.7)
Total 453 6933 (15.3) 347:85 6 (0.7) 240:177 24 (1.8) 100:305 133 (6.2)
  1. Lv:Bt number of L. varicus:number of B. truncatus snails
  2. aAverage number of egg masses/snail
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