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Natural selection

Extreme Sexual Brain Size Dimorphism in Sticklebacks: A Consequence of the Cognitive Challenges of Sex and Parenting?

Alexander Kotrschal, Katja Räsänen, [ ... ], Niclas Kolm

Considerable MHC Diversity Suggests That the Functional Extinction of Baiji Is Not Related to Population Genetic Collapse

Shixia Xu, Jianfeng Ju, [ ... ], Guang Yang

The Weaker Sex? The Propensity for Male-Biased Piglet Mortality

Emma M. Baxter, Susan Jarvis, Javier Palarea-Albaladejo, Sandra A. Edwards

Paternity and Dominance Loss in Male Breeders: The Cost of Helpers in a Cooperatively Breeding Mammal

Sophie Lardy, Aurélie Cohas, [ ... ], Dominique Allainé

The Fitness Cost of Antibiotic Resistance in Streptococcus pneumoniae: Insight from the Field

M. Cyrus Maher, Wondu Alemayehu, [ ... ], Travis C. Porco

Supplementation of Male Pheromone on Rock Substrates Attracts Female Rock Lizards to the Territories of Males: A Field Experiment

José Martín, Pilar López

Ejaculate Economics: Testing the Effects of Male Sexual History on the Trade-Off between Sperm and Immune Function in Australian Crickets

Damian K. Dowling, Leigh W. Simmons

Intense or Spatially Heterogeneous Predation Can Select against Prey Dispersal

Frederic Barraquand, David J. Murrell

Sex, War, and Disease: The Role of Parasite Infection on Weapon Development and Mating Success in a Horned Beetle (Gnatocerus cornutus)

Jeffery P. Demuth, Amrita Naidu, Laura D. Mydlarz

Neighbours' Breeding Success and the Sex Ratio of Their Offspring Affect the Mate Preferences of Female Zebra Finches

Dominique Drullion, Frédérique Dubois

Sexual Selection Halts the Relaxation of Protamine 2 among Rodents

Lena Lüke, Alberto Vicens, [ ... ], Montserrat Gomendio

Special Agents Can Promote Cooperation in the Population

Xin Wang, Jing Han, Huawei Han

Maintenance of Sperm Variation in a Highly Promiscuous Wild Bird

Sara Calhim, Michael C. Double, [ ... ], Andrew Cockburn

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