Locomotor impairment and defense in gravid lizards (Eumeces laticeps): behavioral shift in activity may offset costs of reproduction in an active forager William E. Cooper Jr.Laurie J. VittRaymond B. Huey OriginalPaper Pages: 153 - 157
Provisioning behavior and the estimation of investment ratios in a solitary bee, Calliopsis (Hypomacrotera) persimilis (Cockerell) (Hymenoptera: Andrenidae) Bryan N. Danforth OriginalPaper Pages: 159 - 168
Experimental manipulations of dispersal in the subsocial spider, Theridion pictum Lore M. Ruttan OriginalPaper Pages: 169 - 173
Conflicts, social economics and life history strategies in ants Nigel R. FranksBryan IrelandAndrew F. G. Bourke OriginalPaper Pages: 175 - 181
Inter-litter competition and communal nursing among Norway rats: advantages of birth synchrony Julie A. MennellaMark S. BlumbergHoward Moltz OriginalPaper Pages: 183 - 190
Inter-male competition for high-quality host-plants: the evolution of protandry in a territorial grasshopper Guang-yu WangMichael D. GreenfieldTodd E. Shelly OriginalPaper Pages: 191 - 198
Provisioning of nestlings by dunnocks, Prunella modularis, in pairs and trios compensation reactions by males and females B. J. HatchwellN. B. Davies OriginalPaper Pages: 199 - 209
Parental effort in the California gull: tests of parent-offspring conflict theory Bruce H. Pugesek OriginalPaper Pages: 211 - 215
Intensity of territorial defense in red squirrels: an experimental test of the asymmetric war of attrition Karen PriceStan BoutinRon Ydenberg OriginalPaper Pages: 217 - 222
Mate choice by female white-crowned sparrows in a mixed-dialect population Glen ChiltonM. Ross LeinLuis F. Baptista OriginalPaper Pages: 223 - 227
