1. Sex ratio manipulation and decreased growth of male offspring of undernourished golden hamsters (Mesocricetus auratus)

   • Jay B. Labov
   • U. William Huck
   • Robert D. Lisk

   OriginalPaper Pages: 241 - 249

2. Whistle repertoires of two bottlenosed dolphins, Tursiops truncatus: mimicry of signature whistles?

   • Peter Tyack

   OriginalPaper Pages: 251 - 257

3. Foraging strategies of the marine iguana, Amblyrhynchus cristatus

   • Krisztina G. K. Trillmich
   • Fritz Trillmich

   OriginalPaper Pages: 259 - 266

4. Male dominance, female choice and male copulatory behavior in two species of voles (Microtus ochrogaster and Microtus montanus)

   • Lawrence E. Shapiro
   • Donald A. Dewsbury

   OriginalPaper Pages: 267 - 274

5. Social organization in free-living prairie voles, Microtus ochrogaster

   • Lowell L. Getz
   • Joyce E. Hofmann

   OriginalPaper Pages: 275 - 282

6. Eusociality and extraordinary sex ratios in the spider Anelosimus eximius (Araneae: Theridiidae)

   • Fritz Vollrath

   OriginalPaper Pages: 283 - 287

7. Male choice and competition in Tetraopes tetraophthalmus: effects of local sex ratio variation

   • W. S. Lawrence

   OriginalPaper Pages: 289 - 296

8. Infrasonic calls of the Asian elephant (Elephas maximus)

   • Katharine B. Payne
   • William R. Langbauer Jr.
   • Elizabeth M. Thomas

   OriginalPaper Pages: 297 - 301

9. Sexual selection and spring arrival times of red-necked and Wilson's phalaropes

   • John D. Reynolds
   • Mark A. Colwell
   • Fred Cooke

   OriginalPaper Pages: 303 - 310

10. The unsung songs of great tits (Parus major): learning neighbours' songs for discrimination

    • P. K. McGregor
    • M. I. Avery

    OriginalPaper Pages: 311 - 316