I20 



VERTEBRATE REPRODUCTIVE CYCLES 



Castration, effects on bird 

 behaviour, 83 

 effects on mammalian 



behaviour, 84 

 effects on migration, 93 

 Chimpanzee, sexual be- 

 haviour of, 83, 90 

 Clutch size in birds, 16 

 Colonial nesting in birds, 42 

 Concentration camps, effects 



of, 13 

 Continuous breeding, in 

 domesticated animals, 

 12 

 in primates, 16 

 Copulation, effects on ovula- 

 tion, 18, 77 

 Corpus luteum, hormone in 

 mammals, 65, 69 

 hormone in bitterling, 66 

 structure, 58, 61 

 Courtship display, effects of 

 hormones on, 87, 88 

 significance of, 42, 77 

 Crow, effects of light on, 27 



migration of, 02 

 Cycles, types of, i 



Daylength, effects of. 24, 32, 



and egg-laying in birds, 12 

 Deep sea, breeding in, 40 

 Display, significance of, 42, 77 

 Domestication, effects of, 12 

 Drive, sexual, 81 



Egg-laying in birds, effects 

 of latitude, 8, 9, 11 

 effects of daylength, 12 



Emigration, effects on sea- 

 sonal cycle, 20 



Emperor penguin, autumn 

 breeding of, 5 



Environment, effects of, 20, 



41, 73 

 Equator, breeding on, 10, 21 



Erotization of nervous system, 



Exercise, effects of, 74 

 Eye, importance of, 75, 76 



Female behaviour, and 

 ovaries, 85 

 and hormones, 89 

 Female hormones, 54, 62, 89 

 Ferret, effects of light on, 28 

 importance of eyes, 75 

 internal rhythm in, 30 

 oestrogens and behaviour 

 of, 90 

 Fertilization, delaved in bats, 



7 

 delayed in salamanders, 8 

 Fishes, effects of anterior 

 pituitary hormones, 50 

 effects of emigration, 23 

 effects of light, 29 

 effects of moon, 37 

 effects of temperature, 39 

 sex reversal in, 86 

 Follicle-stimulating-hormone, 



48, 51, 56, 59, 68 

 Food, effects of, 24, 40 

 Frog, breeding in Australian 

 desert, 38 



Gonadotropic hormones, of 

 anterior pituitary 



gland, 48 

 of placenta, 50 



Glossary, 105 



Graafian follicle, 58 



Gulls, colonial nesting in, 42 



Heat, 2. 15 



Hens, peck order in, 89 

 sex reversal in, 86 



Hormones, and behaviour, 87 

 and reproduction, 45 

 effects on nervous system, 



of anterior pituitary gland, 

 48 



