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Table 1 Parameters of embryonic development of Sparicotyle chrysophrii by environmental factor

From: Come rain or come shine: environmental effects on the infective stages of Sparicotyle chrysophrii, a key pathogen in Mediterranean aquaculture

Environmental factor Factor level Incubation period (h) Hatching period (h) Hatching peaka (h) Hatching success (%)
Mean ± SD (Range)
Temperature (± 0.1 °C) 10 995.5 ± 23.6 (948–1044)b 96b 988b 7.3c
14 253.4 ± 17.3 (212–332) 120 248 91.0
18 178.1 ± 14.8 (148–256) 108 176 93.3
22 143.1 ± 22.5 (116–200) 84 124 93.7
26 128.0 ± 12.0 (116–172) 56 124 77.3
30 148.8 ± 20.8 (124–184) 60 148 6.0
pH (± 0.1) 7.0 150.0 ± 9.0 (144–176) 32 144/148 56.0
7.9 143.1 ± 22.5 (116–200) 84 124 93.7
Light regime (light:darkness) 12:12 147.4 ± 25.6 (120–200) 80 124 93.0
0:24 125.1 ± 11.3 (112–232) 120 124 89.3
24:0 141.4 ± 23.4 (108–268) 160 140 88.0
Salinity(ppt)-Temperature (± 0.1 °C) 27−18 191.7 ± 13.6 (152–220) 68 196 89.3
36−18 169.6 ± 15.3 (140–268) 128 168 85.3
37−18 172.7 ± 18.2 (140–228) 88 172 64.7
38−18 179.5 ± 12.7 (168–220) 52 168 80.7
47−18 218.7 ± 11.5 (180–244) 64 220 74.6
27−22 141.8 ± 11.5 (120–168) 148 148 85.3
36−22 129.2 ± 9.3 (108–156) 48 124 74.7
37−22 138.3 ± 16.3 (124–196) 72 128 82.0
38−22 135.0 ± 16.7 (124–228) 104 128 69.0
47−22 182.2 ± 12.7 (148–204) 56 176 64.7
  1. aHatching peak; moment when the highest number hatchings was registered
  2. bIncludes replicates with emerged eggs (n = 3)
  3. cIncludes all replicates (n = 6)