The function of call alternation in the African reed frog (Hyperolius marmoratus): precise call timing prevents auditory masking T. Ulmar Grafe Pages: 149 - 158
Predators choosing between patches with standing crop: the influence of switching rules and input types Markus Frischknecht Pages: 159 - 166
Apparent resource competition among embryos in the brood pouch of a male pipefish Ingrid Ahnesjö Pages: 167 - 172
Polygyny in the red-winged blackbird: do females prefer monogamy or polygamy? S. PribilJaroslav Picman Pages: 183 - 190
Adoption or infanticide: options of replacement males in the European starling H. G. SmithL. WennerbergTorbjörn von Schantz Pages: 191 - 197
Sperm competition or sperm selection: no evidence for female influence over paternity in yellow dung flies Scatophaga stercoraria L. W. SimmonsP. StockleyG. A. Parker Pages: 199 - 206