1. Factors affecting male-male competition in thirteen-lined ground squirrels

   • P. L. Schwagmeyer
   • C. H. Brown

   OriginalPaper Pages: 1 - 6

2. Intra and interspecific behavior of Microtus pennsylvanicus and Microtus pinetorum

   • J. A. Cranford
   • T. L. Derting

   OriginalPaper Pages: 7 - 11

3. Time and energy budgets and competition in the common shrew (Sorex araneus L.)

   • C. J. Barnard
   • C. A. J. Brown
   • Jane Gray-Wallis

   OriginalPaper Pages: 13 - 18

4. Pack size and wolf pup survival: their relationship under varying ecological conditions

   • Fred H. Harrington
   • L. David Mech
   • Steven H. Fritts

   OriginalPaper Pages: 19 - 26

5. Behavioraldominance and its relationship to habitat patch utilization by the hispid cotton rat (Sigmodon hispidus)

   • Stephen R. Spencer
   • Guy N. Cameron

   OriginalPaper Pages: 27 - 36

6. Colonization in a pika population: dispersal vs philopatry

   • Andrew T. Smith
   • Barbara L. Ivins

   OriginalPaper Pages: 37 - 47

7. Differential response of humpback whales, Megaptera novaeangliae, to playback of song or social sounds

   • Peter Tyack

   OriginalPaper Pages: 49 - 55

8. Territoriality by hilltopping males of the great purple hairstreak, Atlides halesus (Lepidoptera, Lycaenidae): convergent evolution with a pompilid wasp

   • John Alcock

   OriginalPaper Pages: 57 - 62

9. Colony activity integration in primitively eusocial wasps: the role of the queen (Polistes fuscatus, Hymenoptera: Vespidae)

   • Hudson K. Reeve
   • George J. Gamboa

   OriginalPaper Pages: 63 - 74

10. The effects of size on the mating behaviour of the dung fly Sepsis cynipsea

    • Paul I. Ward

    OriginalPaper Pages: 75 - 80