1. Maternal investment, sibling competition, and offspring survival with increasing litter size and parity in pigs (Sus scrofa)

   • Inger Lise Andersen
   • Eric Nævdal
   • Knut Egil Bøe

   Original Paper Open access 12 January 2011 Pages: 1159 - 1167

   

2. The effect of maternal body size on embryo survivorship in the broods of pregnant male pipefish

   • Kenyon B. Mobley
   • Charlotta Kvarnemo
   • Adam G. Jones

   Original Paper 11 January 2011 Pages: 1169 - 1177

   

3. Support for maternal manipulation of developmental nutrition in a facultatively eusocial bee, Megalopta genalis (Halictidae)

   • Karen M. Kapheim
   • Sandra P. Bernal
   • William T. Wcislo

   Original Paper Open access 06 January 2011 Pages: 1179 - 1190

   

4. Maternal nutrition affects offspring performance via maternal care in a subsocial spider

   • Mor Salomon
   • David Mayntz
   • Yael Lubin

   Original Paper 29 December 2010 Pages: 1191 - 1202

   

5. No evidence for offspring sex-ratio adjustment to social or environmental conditions in cooperatively breeding purple-crowned fairy-wrens

   • Sjouke A. Kingma
   • Michelle L. Hall
   • Anne Peters

   Original Paper 31 December 2010 Pages: 1203 - 1213

   

6. Tests of the harassment-reduction function and frequency-dependent maintenance of a female-specific color polymorphism in a damselfly

   • Mingzi Xu
   • Ola M. Fincke

   Original Paper 11 January 2011 Pages: 1215 - 1227

   

7. Body size and sexual selection in the koala

   • William A. H. Ellis
   • Fred B. Bercovitch

   Original Paper 06 January 2011 Pages: 1229 - 1235

   

8. Spectral reflectance and communication in the wolf spider, Schizocosa ocreata (Hentz): simultaneous crypsis and background contrast in visual signals

   • David L. Clark
   • J. Andrew Roberts
   • George W. Uetz

   Original Paper 29 January 2011 Pages: 1237 - 1247

   

9. Experienced males have higher mating success than virgin males despite fitness costs to females

   • Panagiotis G. Milonas
   • Shannon L. Farrell
   • David A. Andow

   Original Paper 18 January 2011 Pages: 1249 - 1256

   

10. Yolk androgens in great tit eggs are related to male attractiveness, breeding density and territory quality

    • Vladimír Remeš

    Original Paper 18 January 2011 Pages: 1257 - 1266

    

11. Growth rate and retention of learned predator cues by juvenile rainbow trout: faster-growing fish forget sooner

    • Grant E. Brown
    • Maud C. O. Ferrari
    • Douglas P. Chivers

    Original Paper 18 January 2011 Pages: 1267 - 1276

    

12. Hovering guards of the stingless bee Tetragonisca angustula increase colony defensive perimeter as shown by intra- and inter-specific comparisons

    • Jelle S. van Zweden
    • Christoph Grüter
    • Francis L.W. Ratnieks

    Original Paper 18 January 2011 Pages: 1277 - 1282

    

13. Variation in signal timing behavior: implications for male attractiveness and sexual selection

    • Gerlinde Höbel

    Original Paper 20 January 2011 Pages: 1283 - 1294

    

14. Prior residency advantage for Atlantic salmon in the wild: effects of habitat quality

    • Eli Kvingedal
    • Sigurd Einum

    Original Paper Open access 21 January 2011 Pages: 1295 - 1303

    

15. Female mate preference for a costly ornament in male guppies

    • Kenji Karino
    • Takatsugu Ishiwatari
    • Aya Sato

    Original Paper 18 January 2011 Pages: 1305 - 1315

    

16. Quantifying iridescent coloration in animals: a method for improving repeatability

    • Melissa G. Meadows
    • Nathan I. Morehouse
    • Kevin J. McGraw

    Methods 06 January 2011 Pages: 1317 - 1327