1. Ranges and cold hardiness of two earthworm subspecies (Eisenia nordenskioldi, Lumbricidae, Oligochaeta)

   • D. I. Berman
   • E. N. Meshcheryakova

   OriginalPaper 07 December 2013 Pages: 719 - 727

2. Growth and shell morphology of three mytilidae (Bivalvia) species from the Sea of Japan

   • E. E. Vekhova

   OriginalPaper 07 December 2013 Pages: 728 - 737

3. Postembryonic development of anurans in ponds littered with metal-containing refuse (simulation experiments)

   • E. A. Severtsova
   • D. R. Aguillon Gutierrez

   OriginalPaper 07 December 2013 Pages: 738 - 747

4. Song structure variability in passerine birds: Random variation or direct informative changes

   • M. I. Goretskaia

   OriginalPaper 07 December 2013 Pages: 748 - 759

5. On the growth of incisors in ground squirrels (Spermophilus) during hibernation

   • G. A. Klevezal
   • A. I. Anufriev

   OriginalPaper 07 December 2013 Pages: 760 - 767

6. Structure of colonies in the northern mole vole, Ellobius talpinus (Rodentia, Cricetidae)

   • N. G. Evdokimov

   OriginalPaper 07 December 2013 Pages: 768 - 778

7. Seropositivity for different pathogens in polar bears (Ursus maritimus) from Barents Sea Islands

   • S. V. Naidenko
   • E. A. Ivanov
   • V. V. Rozhnov

   OriginalPaper 07 December 2013 Pages: 779 - 782

8. Observations of the walrus (Odobenus rosmarus) in the Barents, Kara, and Laptev seas in 2010–2012

   • D. M. Glazov
   • O. V. Shpak
   • V. V. Rozhnov

   OriginalPaper 07 December 2013 Pages: 783 - 789

9. Dependence of killer whale (Orcinus orca) acoustic signals on the type of activity and social context

   • O. A. Filatova
   • M. A. Guzeev
   • E. Hoyt

   OriginalPaper 07 December 2013 Pages: 790 - 796

10. Observation of the gray whale (Eschrichtius robustus) in the Laptev Sea

    • O. V. Shpak
    • D. M. Kuznetsova
    • V. V. Rozhnov

    Short Communications 07 December 2013 Pages: 797 - 800