Skip to main content

Table 1 Fecundity and survival estimates for isolated (T1) and paired (T2) individuals from Biomphalaria pfeifferi and Biomphalaria camerunensis populations

From: Analysis of mating system, fecundity, hatching and survival rates in two Schistosoma mansoni intermediate hosts (Biomphalaria pfeifferi and Biomphalaria camerunensis) in Cameroon

Parameters

Snail species

T1

T2

p-value

Number of G1 individuals

B. pfeifferi

35

34

 
 

B. camerunensis

30

30

 

Mean number of egg capsules (sd)

B. pfeifferi

19.0 (4.1)

19.3 (3.7)

0.732

 

B. camerunensis

18.9 (12.6)

27.9 (11.9)

0.010*

Mean number of eggs (sd)

B. pfeifferi

363.2 (66.0)

366.6 (72.9)

0.840

 

B. camerunensis

121.2 (95.8)

315.2 (183.8)

<0.0001*

Number of incubated capsules

B. pfeifferi

32

30

 
 

B. camerunensis

36

42

 

Average incubation time (sd)

B. pfeifferi

9.6 (0.5)

9.4 (0.8)

0.202

 

B. camerunensis

10.0 (1.7)

8.2 (0.9)

<0.0001*

Hatching rate (95 % CI)

B. pfeifferi

87.2 (84.2–89.7)

92.3 (89.5–94.4)

0.5323

 

B. camerunensis

68.8 (63.6–73.5)

92.3 (89.9–94.3)

<0.0049*

Number of G2 offspring

B. pfeifferi

30

30

 
 

B. camerunensis

36

36

 

G2 survival rate at D8 (95 % CI)

B. pfeifferi

72.6 (68.4–76.5)

67.4 (62.8–71.6)

0.0848

 

B. camerunensis

94.3 (90.5–96.6)

82.5 (78.8–85.7)

0.0001*

G2 survival rate at D16 (95 % CI)

B. pfeifferi

64.2 (59.7–68.5)

50.1 (45.5–54.8)

0.0001*

 

B. camerunensis

85.5 (80.4–89.5)

79.7 (75.9–83.2)

0.648

G2 survival rate at D30 (95 % CI)

B. pfeifferi

54.1 (49.5–58.6)

39.2 (34.8–43.9)

0.0001*

 

B. camerunensis

82.5 (77.0–86.9)

76.7 (72.7–80.3)

0.0838

  1. sd: standard deviation; 95 % CI 95 % confidence interval; * the difference is significant