380 



Subject Index 



12, 112 

 /i', 112 

 N, 110 

 Nb, 113 

 N^""', 113 

 No, 113 

 0a, 112 

 ^a^""), 113 



0a^»', 113 



6>(''), 112 

 0f, 112 

 0"), 112 



^a'""*, 113 



V, 111 



minimal, 173 



rank, 171 



reduction in hierarchj^ of mice, 148 

 Visitation frequency, 165 

 Vitamin A 



effects on behavior, 170 

 Vitamin B 



insufficiency, 222 

 Vocalization, 38, 48, 75 



loss of, 77 

 Voles, (see also Microius, Clethrionomys, 

 and Pitymys), 193, 196, 253, 261, 293, 

 317, 318, 322, 323 



adrenalectomized, 218 



adrenal weight, 285, 286, 301 



adrenocortical-densit}' relationships, 304 



anestrus, 220 



birth rates, 292 



competition for food, 297 



confined populations, 272 



copulatory pressure, 290 



crowding mortality, 280 



decline in birthrate, 291 



decrease in reproduction, 286 



depression of fertility, 221 



effects of high density, 276 



effect of increased population density, 

 284 



effect of overcrowding, 269 



effect of population densities, 275 



eosinophil counts, 252 



female, 286 



fights, 296 



hypoglycemic shock, 320, 321 



inhibition of growth and reproduction, 

 316 



intraspecific strife, 323 



laboratory, 274 



litter survival, 294 



meadow, 196, 218, 272, 323 



northern montana, 304 



mortality, 322 



natural populations, 303 



nests, 294 



ovarian atrophy, 220 



pine, 196 



population fluctuation, 312 



red-backed, 196, 311, 312, 314, 318, 323 



relationships between population den- 

 sity and reproduction, 310 



reproductive function, 314 



responses to increased population den- 

 sity, 281 



responses to sociopsychologic factors, 

 269 



self-limited populations, 299 



social pressure, 288 



sociopsychologic factors, 264 



sociopsychologic interactions, 280 



splenic hypertrophy, 242, 272, 273, 274 



X-zone, 283 



White-footed mice (see also Peromyscris), 



273, 323 

 White-footed mice 



population, 305 

 Withdrawal, 162 

 Withdrawal state, 180 

 Woodchuck (see also Marmota), 193 



relationships between population den- 

 sity and reproduction, 310 

 Wound healing 



delay, 210 



X-zone 



acidophilic cells, 197 



androgens, 197 



basophilic nuclei, 197 



Crocidura russula, 197 



experimental treatments, 196 



function, 217 



hormones, 196 



pituitary luteinizing hormone, 197 



Pitymys subterraneus, 196, 197 



reactions to, 196 



shrews, 197 



