Table 2 Mitochondrial cytochrome c oxidase 1 diversity of B. globosus and B. truncatus collected from the Madziwa area, Zimbabwe

B. globosus

Overall

166

12

0.514 ± 0.046

0.002

0.008

− 2.136*

− 3.604

Chihuri C

32

6

0.637 ± 0.076

0.003

0.009

− 2.307**

0.397

Site 1

8

2

0.250 ± 0.180

0.000

0.001

− 1.055

− 0.182

Site 2

8

3

0.464 ± 0.200

0.001

0.001

− 1.310

− 0.999

Site 3

8

2

0.536 ± 0.123

0.001

0.001

1.167

0.866

Site 4

8

4

0.786 ± 0.113

0.010

0.014

− 1.466

2.726

Kaziro C

19

3

0.374 ± 0.130

0.001

0.001

− 0.729

− 0.671

Site 7

7

1

0

0

–

–

–

Site 8

4

2

0.500 ± 0.265

0.001

0.001

− 0.612

0.172

Site 9

8

3

0.607 ± 0.164

0.001

0.001

− 0.448

− 0.478

Mupfure C

98

10

0.558 ± 0.057

0.002

0.009

− 2.202**

− 2.108

Site 5

10

3

0.644 ± 0.101

0.002

0.002

− 0.356

0.390

Site 6

9

4

0.583 ± 0.183

0.001

0.002

− 1.610

− 1.283

Site 10

8

3

0.714 ± 0.123

0.014

0.013

0.675

6.022

Site 11

8

3

0.679 ± 0.122

0.001

0.001

0.069

− 0.224

Site 12

7

2

0.476 ± 0.171

0.001

0.001

0.559

0.589

Site 13

8

4

0.643 ± 0.184

0.001

0.002

− 1.448

− 1.832

Site 14

8

2

0.250 ± 0.180

0.000

0.001

− 1.055

− 0.182

Site 15

8

3

0.607 ± 0.164

0.001

0.001

− 0.448

− 0.478

Site 16

8

3

0.464 ± 0.200

0.001

0.002

− 1.448

− 0.305

Site 17

8

2

0.250 ± 0.180

0.000

0.001

− 1.055

− 0.182

Site 18

8

2

0.571 ± 0.094

0.001

0.001

1.444

0.966

Site 19

8

2

0.250 ± 0.180

0.000

0.001

− 1.055

− 0.182

Nduna C

17

1

0

0

–

–

–

Site 20

4

1

0

0

–

–

–

Site 21

5

1

0

0

–

–

–

Site 22

8

1

0

0

–

–

–

B. truncatus

Overall

16

3

0.575 ± 0.080

0.017

0.012

1.617

11.547

Nyamaruru R

1

1

0

0

–

–

–

Mupfure R

7

3

0.286 ± 0.196

0.005

0.007

− 1.610*

4.273

Kamoyo S

8

1

0

0

–

–

–