1540 



SUBJECT INDEX 



Euplectes pyromelana, reproduction, light and, 



1137 

 Euploids 



Melandrium, sex determination in, 36-38 

 Rumex, sex determination in, 41 

 Euplotes, mating types, 44 



European common hare, breeding season, illu- 

 mination and, 501-502 

 European mole, female prostate, 374 

 Eurycea 

 mesonephric duct, sperm storage in, 1040 

 sex dimorphism, hedonic glands, 1043 

 Eurycea bisHneata, spermatogenesis, seasonal oc- 

 currence, 1036-1037 

 En taenia (see Thamnophis) 



16-Exoestradiol, and isocitric dehydrogenase ac- 

 tivity, 656 

 Experiential factors 



and effect of castration on erotic arousal in man, 



1388 

 and development of behavior, 1357-1359, 1403 

 and development of dominance in fowl, 1258 

 and incubation behavior by ring doves, 1340 

 and mating behavior, 1340 

 and nest-building 

 by birds, 1334 

 by rabbit, 1333 

 by rat, 1337 

 and parental behavior, 1332-1340. 1343 

 Exploratory behavior, rats 

 litter-size and, 1358 

 selective breeding and, 1355 

 External stimuli 



and egg-laying in fowl, refractory {)eriod to 



light, 1146 

 and reproductive activity in birds, neural medi- 

 ation of, 1134-1138 

 and seasonal breeding cycles, 1342 

 availability of food, and seasonal breeding 



cycles in birds, 1342 

 availability of nest, and egg-laying in brood 



parasites, 1281-1282 

 continuous light, harmful effects on reproduc- 

 tion in fowl, 114() 

 courtship by male 

 and estrogen secretion in ring dove, 1281 

 and follicle-stimulating hormone secretion in 



ring dove, 1281 

 and nest-building in birds, 1275-1276 

 crowding, and ovarian functioning in mice, 1342 

 emotional arousal, and inhibition of milk-ejec- 

 tion, 1324-1325 

 environmental stress, and ovarian follicular 



growth, 457 

 environmental temperature 



and broodiness in turkeys, 1142 

 and nest -building l)v Muridae, 1309 

 and ropnxluction iii birds, 1141-1142 

 and seasonal l)rpeding cycles, 1342 

 light 



and fat deposition in birds, 1139 



and ovulation-egg-laving sequences in fowl, 



1149, 1150 

 and seasonal breeding cycles, 1137-1141, 1342 

 nesting material 



and luteinizing hormone secretion in ring 



dove, 1281 

 and progesterone secretion in ring dove, 1281 

 nesting sites 



and nest-building by birds, 1276 

 and reproduction in birds, 1142-1143 

 olfactory, and reproductive cycle in mouse, 277, 



1342 

 other birds, and breeding cycles in birds, 1342 



External stimuli (cont.) 



presence of eggs, and incubation in birds, 1294- 



1297 

 presence of ram 



and estrus in ewe, 277 

 and ovarian follicular growth in ewe, 277 

 presence of young 



and hypophyseal gonadotrophin secretion, 



1302 

 and inhibition of egg-laying, 1302 

 and retrieving behavior, 1317-1320 

 psychic, and reproduction in birds, 1143-1144 

 rainfall, and seasonal breeding cycles in birds, 



1142 

 rainy season, and nest-building by birds, 1276 

 sight of incubating mate, and secretion of crop 



milk by male pigeon, 277 

 sight of other birds, and ovulation in pigeon, 277 

 sight of young, and parental behavior in birds, 



1300-1301 

 sounds 



and gametogenesis in birds, 1142 

 and milk-ejection, 1343 



of other birds, and egg-laying in shell para- 

 keet, 277, 1280 



Falconinae, ovary, symmetrical development, 1111 

 Falco sparverius 



ovary, androgen and, 1131 

 oviduct, androgen and, 1125 

 Fallopian tube (see Oviduct) 

 Fat bodies, Lacerta, orchiectomy and, 1045 

 Fat deposition cycles, birds, 1139-1140 



association with migration, 1139 

 Fat free diets 



and hypophyseal cytology, 676 

 and testis, 082 

 Fatty acid 

 deficiency 



and ovary, 685 

 and pregnancy, 691 

 and uterus, 685 

 levels, and testis structure, 680 

 Feather 



color, direct effect of luteinizing hormone, 1120 

 development (see also Molting) 

 estrogen inhibition of cock feathering, 1119- 



1120 

 estrogen stimulation of hen feathering, 1119- 



1120 

 thyroxine and, 1121 

 Felis catus (see Cat) 

 Felis concolor 

 litter size, 961 

 pregnancy, length, 961 

 Felis leo (see Lion) 



Female accessory reproductive glands 

 homologues in males, 368 

 in mammals, 367-368 

 Female sex broods in Drosophila 

 maternally influenced, 25-26 

 paternally influenced, 26-27 

 Femoral glands 



Lacerta, orchiectomy and, 1045 

 lizards, as male accessory sex structures, 1043 

 Sceloporus 

 estrone and, 1068 

 testosterone and, 1047, 1068 

 Ferret 



breeding season, 502 

 copulation, 723 

 corpus luteum 



functional life, 460 



