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Table 1 Morphometric and meristic counts (mean ± SE) of C. gariepinus from culture and captured specimens from the Ganga River

From: Morpho-meristics, maturity stages, GSI and gonadal hormone plasticity of African catfish Clarias gariepinus (Burchell 1822) that invaded into the Ganga River, India

  Culture River caught specimens from Mean ± SE of I, II, III, IV
I
Kanpur
II
Allahabad
III
Varanasi
IV
Ghazipur
Morphometric parameters (in cm)
 Total length (TL) 50.00 ± 0.61 42.3–47.0 38.4–48.0 43.7–52.4 11.7–50.7 43.46 ± 3.12
 Standard length (SL) 37.08 ± 1.37 34.6–40.8 33.8–42.3 40.4–48.6 8.6–46.5 38.38 ± 3.04
 Head depth (HD) 8.32 ± 0.09 5.0–7.2 6.3–7.3 7.9–8.4 4.2–8.5 7.05*± 0.38
 Body depth at anus (BAD) 3.58 ± 0.06 3.5–4.0 3.6–3.9 3.5–3.8 2.4–3.7 3.56 ± 0.12
 Snout length (SNL) 4.38 ± 0.09 2.0–2.8 2.4–3.1 2.8–3.5 1.7–3.4 2.73 ± 0.16
 Eye diameter (ED) 1.17 ± 0.03 1.0–1.2 1.0–1.3 1.0–1.3 0.8–1.3 1.13 ± 0.04
 Dorsal fin length (DFL) 28.55 ± 0.14 19.1–25.8 21.8–26.3 25.4–29.2 5.8–28.8 24.07 ± 1.87
 Pectoral fin length (PECFL) 4.78 ± 0.10 3.5–4.7 3.7–4.4 3.8–4.6 2.4–4.7 4.07 ± 0.19
 Pelvic fin length (PELFL) 3.99 ± 0.11 3.2–3.6 3.1–3.8 3.1–3.6 3–21.2 4.85 ± 1.49
 Anal fin length (AFL) 11.63 ± 0.89 11.5–18.7 15.8–19.4 10.8–11.8 4.1–11.9 13.58 **± 1.32
 Caudal fin length (CFL) 12.93 ± 0.79 5.4–10.1 4.6–5.7 3.3–4.1 2.4–4.2 5.02 ± 0.60
 Pre-pelvic distance from tip of mouth (PPELD) 20.67 ± 0.14 14.3–16.8 15.2–17.2 16.4–18.9 4.1–20.1 15.79 ± 1.15
 Pre-pectoral distance from tip of mouth (PPECD) 10.48 ± 0.10 7.4–7.7 7.3–7.5 7.6–9.2 3.2–10.2 7.60 ± 0.47
 Pre-anal distance from tip of mouth (PAD) 25.46 ± 0.13 17.3–20.6 18.9–21.8 21.1–25.6 7.6–26.4 20.39 ± 1.39
 Caudal peduncle depth (CPD) 3.76 ± 0.11 3.0–5.4 4.6–5.7 3.3–4.1 2–4.2 4.18 ± 0.31
 Pectoral spine length (PECSL) 3.64 ± 0.10 2.4–4.1 2.9–4.3 3.4–4.2 2.0–4.7 3.49 ± 0.24
 Head length (HL) 12.23 ± 0.37 10.1–10.3 10.3–11.3 7.2–7.7 2.5–8.2 8.58*± 0.71
 Weight (W) g 953.83 ± 16.18 430–520 380–670 690–815 170–838 578.42 ±59.10
Meristic parameters
 Dorsal fin rays (DFR) 71.33 ± 0.45 70–74 70–73 70–74 70–72 71.42 ± 0.43
 Anal fin rays (AFR) 52.42 ± 0.26 52–54 52–53 51–53 51–53 52.33 ± 0.26
 Pectoral fin rays (PECFR) 6.67 ± 0.31 8–9 8–9 6–8 6–9 7.92* ± 0.11
 Pelvic fin rays (PELFR) 6.92 ± 0.26 6–7 6–8 6–8 6–7 6.67 ± 0.22
 Caudal fin rays (CFR) 15.58 ± 0.23 15–16 15–17 15–17 15–16 15.67 ± 0.22
  1. Significance level *P<0.05, **P<0.01 in comparison to C. gariepinus in culture