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TABLE 4.1 Estimates of Mean Number of Parasite Species per Host, Mean Host Specificity, and Global Species Richness for the Parasitic Trematodes, Cestodes, Nematodes, and Acanthocephalans That Parasitize Each of the Major Vertebrate Taxa of Hosts [after Poulin and Morand, 2004)]

Parasite Species

Host Species (known no. of host species)

Chondrichthys (843)

Osteichthys (18,150)

Amphibia (4,975)

Reptilia (6,300)

Aves (9,040)

Mammalia (4,637)

Total (43,945)

Mean parasite species per host species

Trematoda

0.12

2.04

1.27

1.06

3.24

1.61

 

Cestoda

2.71

1.57

0.27

0.39

3.67

1.89

 

Acanthocephala

1.01

0.19

0.42

0.72

0.28

 

Nematoda

0.48

1.49

2.82

2.15

3.32

3.90

 

Mean host specificity

Trematoda

2.00

6.35

5.40

1.77

2.97

2.01

 

Cestoda

1.69

6.38

4.75

2.21

2.36

1.89

 

Acanthocephala

14.95

6.74

12.50

8.35

4.32

 

Nematoda

2.67

10.28

5.27

2.12

3.28

6.07

 

Estimated global species richness

Trematoda

51

5,831

1,170

3,773

9,862

3,714

24,401

Cestoda

1,352

4,466

283

1,112

14,058

4,637

25,908

Acanthocephala

1,226

140

212

779

301

2,658

Nematoda

152

2,631

2,662

6,389

9,150

2,979

23,963

Total

1,555

14,154

4,225

11,486

33,849

11,631

76,930



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