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Table 2 Mortality rates (n recently dead/total number) of oysters greater than and smaller than 40 mm SL from each of the 10 estuaries surveyed in 2014

From: Exploring the decline of oyster beds in Atlantic Canada shorelines: potential effects of crab predation on American oysters (Crassostrea virginica)

Estuary <40 mm SL >40 mm SL
Mortality rate 95% CI Mortality rate 95% CI
Boughton river 74.6% (185/248) 68.8–79.6 14.3% (30/209) 10.2–19.8
East river 5.2% (106/2034) 4.3–6.3 23.6% (87/369) 19.5–28.2
North river 4.5% (105/2309) 3.8–5.5 13.2% (123/930) 11.2–15.6
Dunk river 1.3% (23/1808) 0.8–1.9 6.0% (22/368) 3.9–8.9
Wilmot river 1.2% (18/1495) 0.7––1.9 4.5% (15/370) 2.4–6.6
Kildare river 24.9% (57/229) 26.5––40.5 17.4% (92/530) 14.4–20.8
Hills river 36.2% (202/558) 35.6–44.1 33.3% (99/297) 28.2–38.9
Mill river 3.7% (31/844) 2.6–5.2 7.6% (24/317) 5.1–11.1
Cascumpec bay 6.8% (23/339) 4.5–10.0 19.8% (79/400) 16.1–23.9
Bideford river 0.96% (12/1255) 0.5–1.7 5.1% (16/312) 3.1–8.2