372 



Subject Index 



Mice {see also house mouse, AIus, white- 

 footed mice, mouse), 26, 148, 170, 193, 

 196, 19S, 212, 218, 222, 257, 264, 277, 

 293, 309 



adrenals, 200 



adrenal weights, 246 



adrenocortical responses, 270 



albino, 264 



androgen, 221 



anestrus, 220 



antibody formation, 278 



blood level of TSH, 237 



corticosterone, 236 



Coxsackie infections, 256, 257 



decline in birthrate, 291 



during pregnancy, 196 



effect of new environment, 265 



effect of overcrowding, 269 



effect of population density, 274 



effect of social pressures, 268 



eosinophil counts, 252 



fighting social competition, 287 



gonadotropins, 309 



harderian glands, 240 



hierarchy, 265 



hypoglycemic shock, 321 



hypophysectomized, 212 



inanition, 222 



inbred, 274 



inbred albino, 273 



laboratory, 196 



lactation, 274 



medullary hypertrophy, 227 



method of inducing an inflammatory 

 response, 277 



nursing, 210 



ovarian atrophy, 220 



ovaries, 220 



pituitary-adrenocortical activity, 273 



pneumococcal infection, 256 



pregnant, 210 



preputial glands, 292 



radiothyroidectomized, 239 



release of iodine, 238 



reproduction, 274 



reproductive suppression, 275 



resistance to infection, 277 



shock death, 225 



social hierarcy, 264 



sociopsychologic interactions, 280 



sjjlenic hypertrophy, 242, 273, 274 



streptococcal infection, 256 



susceptibility to trichinella, 277 



testes, 238 



thymus, 283 



thj'roid activity, 235 



trichinosis, 257 



tuberculosis, 257, 279 



tuberculosis infections, 256 

 Microsorex hiyi, 193, 246 

 Microtus (see also voles), 77, 301, 305, 323 



hypoglycemic shock, 320 



natural populations, 303 



relationships between population den- 

 sity and reproduction, 310 



"shock disease", 225 

 Microtus agrestis, 196, 251, 273, 323 



behavior, 222 



estrous pattern, 222 



inhibition of growth and i('])roduction, 

 316 



number of births, 222 



respons(>s to increased pf)pulation den- 

 sity, 281 



sociopsj-chologic factors, 264 



splenic hypertrophy, 273 

 Microtus arvalis, 196, 218 



confined populations, 272 



crowding mortality, 280 



sex accessories, 219 

 Microtus californicus, 323 



reproduction, 317 

 Microtus montanus, 305, 316, 317, 320, 323 



population density, 303, 314 



population fluctuation, 303 

 Microtus ochrogaster 



reproduction, 317 

 Microtus oeconomus 



population cycles, 318 

 Microtus orcadensis 



nucleus pulposus enlargement, 261 



sociopsychologic factors, 264 



splenic hyjjertrophy, 273 

 Microtus pcnnsylvanicus, 323 



adrenocortical-densitj' relationships, 304 



adrenal weight, 285 



body-adrenal relationships, 247 



effect of increased population density, 

 284 



J 



