| | This journal provides immediate access to some articles. Research Articles Upstream reciprocity and the evolution of gratitude Martin A Nowak and Sébastien Roch PMCID: PMC2197219 Using models to identify routes of nosocomial infection: a large hospital outbreak of SARS in Hong Kong Kin On Kwok, Gabriel M Leung, Wai Yee Lam, and Steven Riley PMCID: PMC2197207 Compelling evidence that a single nucleotide substitution in TYRP1 is responsible for coat-colour polymorphism in a free-living population of Soay sheep J Gratten, D Beraldi, B.V Lowder, A.F McRae, P.M Visscher, J.M Pemberton, and J Slate PMCID: PMC2197217 Early Cambrian origin of modern food webs: evidence from predator arrow worms J Vannier, M Steiner, E Renvoisé, S.-X Hu, and J.-P Casanova PMCID: PMC2197202 No gastric mill in sauropod dinosaurs: new evidence from analysis of gastrolith mass and function in ostriches Oliver Wings and P. Martin Sander PMCID: PMC2197205 Integration of sensory and motor processing underlying social behaviour in túngara frogs Kim L Hoke, Michael J Ryan, and Walter Wilczynski PMCID: PMC2197214 Rapid jamming avoidance in biosonar Erin H Gillam, Nachum Ulanovsky, and Gary F McCracken PMCID: PMC2197216 Food web dynamics affect Northeast Arctic cod recruitment Dag Ø Hjermann, Bjarte Bogstad, Anne Maria Eikeset, Geir Ottersen, Harald Gjøsæter, and Nils Chr Stenseth PMCID: PMC2197215 1200 years of regular outbreaks in alpine insects Jan Esper, Ulf Büntgen, David C Frank, Daniel Nievergelt, and Andrew Liebhold PMCID: PMC2197206 Detection of a population replacement at the Classic–Postclassic transition in Mexico Rolando González-José, Neus Martínez-Abadías, Antonio González-Martín, Josefina Bautista-Martínez, Jorge Gómez-Valdés, Mirsha Quinto, and Miquel Hernández PMCID: PMC2197204 Tag-based indirect reciprocity by incomplete social information Naoki Masuda and Hisashi Ohtsuki PMCID: PMC2197208 Inbreeding effects on immune response in free-living song sparrows (Melospiza melodia) Jane M Reid, Peter Arcese, Lukas F Keller, Kyle H Elliott, Laura Sampson, and Dennis Hasselquist PMCID: PMC1950295 Does migration of hybrids contribute to post-zygotic isolation in flycatchers? Thor Veen, Nina Svedin, Jukka T Forsman, Mårten B Hjernquist, Anna Qvarnström, Katherine A. Thuman Hjernquist, Johan Träff, and Marcel Klaassen PMCID: PMC2197218 Detecting kin selection at work using inclusive fitness Alan Grafen PMCID: PMC2197210 Seasonality in a temperate zone bird can be entrained by near equatorial photoperiods Alistair Dawson PMCID: PMC2197212 Male phenotypic quality influences offspring sex ratio in a polygynous ungulate Knut H Røed, Øystein Holand, Atle Mysterud, Aage Tverdal, Jouko Kumpula, and Mauri Nieminen PMCID: PMC2197213 Songbird migration across the Sahara: the non-stop hypothesis rejected! Heiko Schmaljohann, Felix Liechti, and Bruno Bruderer PMCID: PMC2197203 An event-based model of superspreading in epidemics Alex James, Jonathan W Pitchford, and Michael J Plank PMCID: PMC2197209 Partner choice creates competitive altruism in humans Pat Barclay and Robb Willer PMCID: PMC2197220 |
