<p>1 - Sexual Conflict and Sexual Selection in the Goodeinae, a Clade of Viviparous Fish with Effective Female Mate Choice</p> <p>Constantino Macías Garcia and Alejandra Valero </p> <p>2 - A Spatial Dance to the Music of Time in the Leks of Long-tailed Manakins</p> <p>David B. McDonald</p> <p>3 - Host Use by Generalist and Specialist Brood Parasitic Cowbirds at Population and Individual Levels</p> <p>María C. de Mársico, Bettina Mahler, Manuela Chomnalez, Alejandro G. Di Giácomo and Juan C. Reboreda</p> <p>4 - Dealing with Uncertainty: Flexible Reproductive Strategies in a Tropical Passerine Bird in an Unstable Ecological and Social Environment</p> <p>Michael S. Webster, Jordan Karubian and Hubert Schwabl</p> <p>5 – Color in a Long-lived Tropical Seabird: Sexual Selection in a Life History Context</p> <p>Roxana Torres and Alberto Velando</p><SUP> </SUP> <p>6 - Intra-specific Variation in the Behavioral Ecology of a Tropical Carnivore, the Spotted Hyena</p> <p>Kay E. Holekamp and Stephanie M. Dloniak</p> <p>7 – Ecology, Social Behavior and Conservation in Zebras</p> <p>Daniel I. Rubenstein</p> <p>8 - Social Organization in Callithrix jacchus: Cooperation and Competition</p> <p>Maria Emília Yamamoto, Arrilton Araújo, Maria Bernardete C. de Sousa and Maria de Fátima Arruda</p> <p>9 - Ecological Determinants of Social Systems: Perspectives on the Functional Role of Roosting Ecology in the Social Behavior of Tent-roosting Bats</p> <p>Gloriana Chaverri and Thomas H. Kunz</p>