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Table 2 Larval longevity and swimming ratio 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 Na Survival period (h) Swimming ratio (%)
Mean ± SD (Range) Mean ± SD (Range)
Temperature (± 0.1 °C) 10 44b 33.5 ± 28.0 (4–104)b 72.6 ± 22.6 (12.5–96.2)b
14 273 20.5 ± 17.7 (0–100) 61.9 ± 24.5 (0–94.7)
18 280 17.3 ± 13.9 (0–72) 61.4 ± 25.4 (0–93.8)
22 281 12.9 ± 9.0 (0–52) 53.7 ± 26.3 (0–92.3)
26 232 9.5 ± 7.1 (0–32) 43.9 ± 24.9 (0–85.7)
30 20 3.6 ± 2.2 (0–8) 18.8 ± 10.3 (0–25.0)
pH (± 0.1) 7.0 168 7.7 ± 7.0 (0–40) 37.6 ± 22.9 (0–90.0)
7.9 281 12.9 ± 9.0 (0–52) 53.7 ± 26.3 (0–92.3)
Light regime (light:darkness) 12:12 281 12.9 ± 8.7 (0–52) 54.5 ± 23.5 (0–88. 9)
0:24 268 12.8 ± 9.3 (0–48) 57.1 ± 23.1 (0–90.0)
24:0 249 12.4 ± 7.5 (0–40) 52.9 ± 24.7 (0–92.3)
Salinity(ppt)-Temperature (± 0.1 °C) 27−18 134 12.9 ± 8.5 (0–36) 57.7 ± 22.2 (0–88.9)
36−18 128 15.8 ± 8.7 (4–40) 62.6 ± 20.0 (12.5–90.0)
37−18 98 31.6 ± 19.1 (4–84) 77.3 ± 21.2 (12.5–95.2)
38−18 122 26.1 ± 12.4 (4–56) 76.5 ± 16.6 (12.5–92.9)
47−18 155 13.4 ± 9.5 (0–44) 55.9 ± 28.2 (0–90.9)
27−22 128 13.3 ± 14.1 (0–76) 48.5 ± 33.3 (0–90.9)
36−22 112 13.4 ± 6.5 (4–48) 61.0 ± 17.0 (12.5–91.7)
37−22 123 13.9 ± 7.0 (4–32) 61.6 ± 20.0 (25.0–87.5)
38−22 103 13.7 ± 10.6 (4–44) 51.9 ± 25.5 (25.0–90.9)
47−22 97 15.6 ± 13.8 (0–44) 53.3 ± 31.5 (0–90.9)
  1. aN, number of emerged oncomiracidia used to calculate the survival period and swimming ratio
  2. bIncludes replicates with emerged eggs (R = 3)