Table 1 List and characteristics of recorded hyenas.

#30 Rocco (lives with Domino)

male

20

vasectomized

Control

S

20

#57 Gremlin (lives with Kadogo)

male

14

Flut

Anti-androgen

S

98

#59 Winnie (lives with Kombo)

male

14

Flut&Fin

Anti-androgen

S

40

#64 Dusty (lives with Denali)

male

11

gonadectomized

gonadectomized

D

35

#65 Denali (lives with Dusty)

male

11

Control

Control

S

27

#82 Buster (lives with BJ)

male

7

Letrozole

Anti-oestrogen

S

52

#55 Nakuru (lives with Nairobi)

female

14

Flut&Fin

Anti-androgen

S

26

#56 Nairobi (lives with Nakuru)

female

14

Flut&Fin

Anti-androgen

D

31

#61 Domino (lives with Rocco)

female

13

Flut&Fin

Anti-androgen

D

63

#63 BJ (lives with Buster)

female

12

gonadectomized

gonadectomized

D

33

#68 Ursa (lives with Cass)

female

10

Control

Control

S

53

#71 Cass (lives with Ursa)

female

10

Control

Control

D

55

#77 Kombo (lives with Winnie)

female

9

Control

Control

D

42

#83 Kadogo (lives with Gremlin)

female

6

Letrozole

Anti-oestrogen

D

33

#90 Tembo (lives with Haji and Jambo)

male

2

Fin&Csdx

Anti-androgen

S

26

#91 Haji (lives with Tembo and Jambo)

female

2

Fin&Csdx

Anti-androgen

S

21

#92 Jambo (lives with Tembo and Haji)

female

2

Fin&Csdx

Anti-androgen

D

40