Introduction Patterns - Alien Reptiles and Amphibians - page 32

Fig. 2.6 Distribution frequency of minimum number of introduction events among species. The
distribution is modelled by the negative power function y = 419.44 × −1.8280 , with R 2 = 0.9077

Table 2.2 Numbers of introduction events per taxonomic family. Family numbers correspond to
those of Fig. 2.7
Family
number

Number of
introductions

Family
number

Number of
introductions Family Family

1 Emydidae 2,108 26 Elapidae 34

2 Gekkonidae 503 27 Varanidae 30

3 Ranidae 471 28 Teidae 22

4 Iguanidae 343 29 Bombinatoridae 16

5 Colubridae 302 30 Microhylidae 15

6 Hylidae 241 31 Pelomedusidae 15

7 Bufonidae 154 32 Chelidae 14

8 Testudinidae 153 33 Proteidae 13

9 Lacertidae 148 34 Discoglossidae 12

10 Geoemydidae 127 35 Anguidae 9

11 Leptodactylidae 103 36 Kinosternidae 8

12 Pythonidae 86 37 Myobatrachidae 8

13 Scincidae 86 38 Alytidae 7

14 Boidae 84 39 Cordylidae 7

15 Typhlopidae 81 40 Crocodylidae 7

16 Trionychidae 71 41 Rhacophoridae 6

17 Salamandridae 68 42 Cryptobranchidae 5

18 Plethodontidae 53 43 Gymnophthalmidae 3

19 Viperidae 53 44 Helodermatidae 3

20 Chelydridae 50 45 Pygopodidae 3

21 Alligatoridae 45 46 Amphisbaenidae 2

22 Agamidae 43 47 Pelobatidae 2

23 Chamaeleontidae 43 48 Acrochordidae 1

24 Pipidae 37 49 Dendrobatidae 1

25 Ambystomatidae 36 50 Leptotyphlopidae 1