Published in Proc Natl Acad Sci U S A on January 21, 2009
Sperm morphology and sperm velocity in passerine birds. Proc Biol Sci (2009) 1.55
Resolving variation in the reproductive tradeoff between sperm size and number. Proc Natl Acad Sci U S A (2011) 1.37
Sperm swimming velocity predicts competitive fertilization success in the green swordtail Xiphophorus helleri. PLoS One (2010) 1.33
Sperm competition and the evolution of sperm design in mammals. BMC Evol Biol (2011) 1.24
Linking sperm length and velocity: the importance of intramale variation. Biol Lett (2010) 1.12
Sperm competition, sperm numbers and sperm quality in muroid rodents. PLoS One (2011) 1.11
Female reproductive tract form drives the evolution of complex sperm morphology. Proc Natl Acad Sci U S A (2012) 1.10
Mating behavior and the evolution of sperm design. Proc Natl Acad Sci U S A (2011) 1.10
Sperm midpiece length predicts sperm swimming velocity in house mice. Biol Lett (2010) 1.07
Mating and Parental Care in Lake Tanganyika's Cichlids. Int J Evol Biol (2011) 1.02
How multiple mating by females affects sexual selection. Philos Trans R Soc Lond B Biol Sci (2013) 0.99
Why mammalian lineages respond differently to sexual selection: metabolic rate constrains the evolution of sperm size. Proc Biol Sci (2011) 0.98
Experimental evolution of sperm competitiveness in a mammal. BMC Evol Biol (2011) 0.97
Sperm competition selects for sperm quantity and quality in the Australian Maluridae. PLoS One (2011) 0.97
Patterns of genetic variation and covariation in ejaculate traits reveal potential evolutionary constraints in guppies. Heredity (Edinb) (2010) 0.95
Sperm competitiveness in frogs: slow and steady wins the race. Proc Biol Sci (2009) 0.93
Mass-specific metabolic rate and sperm competition determine sperm size in marsupial mammals. PLoS One (2011) 0.92
Long sperm fertilize more eggs in a bird. Proc Biol Sci (2015) 0.91
Sex, ecology and the brain: evolutionary correlates of brain structure volumes in Tanganyikan cichlids. PLoS One (2010) 0.90
Short-term variation in sperm competition causes sperm-mediated epigenetic effects on early offspring performance in the zebrafish. Proc Biol Sci (2014) 0.86
Why small males have big sperm: dimorphic squid sperm linked to alternative mating behaviours. BMC Evol Biol (2011) 0.85
Evolution of sperm structure and energetics in passerine birds. Proc Biol Sci (2013) 0.85
Convergence, recurrence and diversification of complex sperm traits in diving beetles (Dytiscidae). Evolution (2012) 0.84
Genetic and potential non-genetic benefits increase offspring fitness of polyandrous females in non-resource based mating system. BMC Evol Biol (2010) 0.82
Tactic-specific differences in seminal fluid influence sperm performance. Proc Biol Sci (2013) 0.81
Variability in sperm form and function in the context of sperm competition risk in two Tupinambis lizards. Ecol Evol (2014) 0.80
Assessing the potential for post-copulatory sexual selection in elasmobranchs. J Fish Biol (2012) 0.80
Distinct evolutionary patterns of morphometric sperm traits in passerine birds. Proc Biol Sci (2012) 0.79
Ejaculate Characteristics Depend on Social Environment in the Horse (Equus caballus). PLoS One (2015) 0.79
Proteins involved in motility and sperm-egg interaction evolve more rapidly in mouse spermatozoa. PLoS One (2014) 0.79
Dietary carotenoids do not improve motility or antioxidant capacity in cichlid fish sperm. Fish Physiol Biochem (2014) 0.79
Recent advances in bird sperm morphometric analysis and its role in male gamete characterization and reproduction technologies. Asian J Androl (2016) 0.78
Female major histocompatibility complex type affects male testosterone levels and sperm number in the horse (Equus caballus). Proc Biol Sci (2015) 0.78
Variation in apical hook length reflects the intensity of sperm competition in murine rodents. PLoS One (2013) 0.78
Sperm length is not influenced by haploid gene expression in the flies Drosophila melanogaster and Scathophaga stercoraria. Proc Biol Sci (2009) 0.78
Ovarian fluid allows directional cryptic female choice despite external fertilization. Nat Commun (2016) 0.77
No experimental evidence for sneaking in a west african cichlid fish with extremely long sperm. Int J Evol Biol (2013) 0.77
Postcopulatory sexual selection results in spermatozoa with more uniform head and flagellum sizes in rodents. PLoS One (2014) 0.77
Sperm number trumps sperm size in mammalian ejaculate evolution. Proc Biol Sci (2015) 0.77
Structural evolution of CatSper1 in rodents is influenced by sperm competition, with effects on sperm swimming velocity. BMC Evol Biol (2014) 0.77
Current status and potential of morphometric sperm analysis. Asian J Androl (2016) 0.77
The dynamics of sperm cooperation in a competitive environment. Proc Biol Sci (2014) 0.77
Sexual selection and the adaptive evolution of PKDREJ protein in primates and rodents. Mol Hum Reprod (2014) 0.76
Exposure to endosulfan influences sperm competition in Drosophila melanogaster. Sci Rep (2014) 0.76
Hidden female physiological resistance to male accessory gland substances in a simultaneous hermaphrodite. J Exp Biol (2017) 0.75
Evolution of sperm morphology in anurans: insights into the roles of mating system and spawning location. BMC Evol Biol (2014) 0.75
Integrated and independent evolution of heteromorphic sperm types. Proc Biol Sci (2013) 0.75
Sneaker Male Squid Produce Long-lived Spermatozoa by Modulating Their Energy Metabolism. J Biol Chem (2016) 0.75
Differences in the fatty-acid composition of rodent spermatozoa are associated to levels of sperm competition. Biol Open (2015) 0.75
A cost for high levels of sperm competition in rodents: increased sperm DNA fragmentation. Proc Biol Sci (2016) 0.75
No evidence of sperm conjugate formation in an Australian mouse bearing sperm with three hooks. Ecol Evol (2013) 0.75
Testes mass, but not sperm length, increases with higher levels of polyandry in an ancient sex model. PLoS One (2014) 0.75
Inferring the historical patterns of biological evolution. Nature (1999) 18.22
Effect size, confidence interval and statistical significance: a practical guide for biologists. Biol Rev Camb Philos Soc (2007) 11.97
Phylogenetic analysis and comparative data: a test and review of evidence. Am Nat (2002) 10.78
Bayesian analysis of correlated evolution of discrete characters by reversible-jump Markov chain Monte Carlo. Am Nat (2006) 6.10
Sperm in competition: not playing by the numbers. Trends Ecol Evol (2004) 3.36
Sperm competition influences sperm size in mammals. Proc Biol Sci (1991) 3.26
Spermatozoal traits and sperm competition in Atlantic salmon: relative sperm velocity is the primary determinant of fertilization success. Curr Biol (2004) 2.74
Sperm mobility determines the outcome of sperm competition in the domestic fowl. Proc Biol Sci (1999) 2.54
Larger sperm outcompete smaller sperm in the nematode Caenorhabditis elegans. Proc Biol Sci (1998) 2.35
Sperm competition in fishes: the evolution of testis size and ejaculate characteristics. Am Nat (1997) 2.07
Sperm competition: motility and the midpiece in primates. Nature (2002) 1.96
Relative testis size and sperm morphometry across mammals: no evidence for an association between sperm competition and sperm length. Proc Biol Sci (2003) 1.85
Sperm velocity and longevity trade off each other and influence fertilization in the sea urchin Lytechinus variegatus. Proc Biol Sci (2000) 1.74
Implications of diversity in sperm size and function for sperm competition and fertility. Int J Dev Biol (2008) 1.68
Sperm competition games: external fertilization and "adaptive"' infertility. J Theor Biol (1996) 1.66
Male fertility in natural populations of red deer is determined by sperm velocity and the proportion of normal spermatozoa. Biol Reprod (2004) 1.61
Sperm mobility: A primary determinant of fertility in the domestic fowl (Gallus domesticus). Biol Reprod (1999) 1.40
The origins of sexual dimorphism in body size in ungulates. Evolution (2002) 1.29
Sperm competition: linking form to function. BMC Evol Biol (2008) 1.29
Sperm competition and sperm midpiece size: no consistent pattern in passerine birds. Proc Biol Sci (2007) 1.25
Sexual selection determines parental care patterns in cichlid fishes. Evolution (2008) 1.23
Evolutionary relationships in the sand-dwelling cichlid lineage of lake tanganyika suggest multiple colonization of rocky habitats and convergent origin of biparental mouthbrooding. J Mol Evol (2004) 1.16
Reproductive-tactic-specific variation in sperm swimming speeds in a shell-brooding cichlid. Biol Reprod (2007) 1.08
The use of optical tweezers to study sperm competition and motility in primates. J R Soc Interface (2008) 1.05
Evolutionary pathways in shorebird breeding systems: sexual conflict, parental care, and chick development. Evolution (2005) 1.05
Trout sperm motility. The transient movement of trout sperm is related to changes in the concentration of ATP following the activation of the flagellar movement. Eur J Biochem (1987) 1.03
Sperm quality as reflected through morphology in salmon alternative life histories. Biol Reprod (2002) 1.00
Phylogenetic relationships of the Lake Tanganyika cichlid tribe Lamprologini: the story from mitochondrial DNA. Mol Phylogenet Evol (2007) 0.93
Motility, ATP levels and metabolic enzyme activity of sperm from bluegill (Lepomis macrochirus). Comp Biochem Physiol A Mol Integr Physiol (2005) 0.85
Species diversity can drive speciation. Nature (2005) 2.45
Artificial selection on relative brain size in the guppy reveals costs and benefits of evolving a larger brain. Curr Biol (2013) 2.44
Inclusive fitness theory and eusociality. Nature (2011) 2.31
Reproductive effort, molting latitude, and feather color in a migratory songbird. Science (2004) 2.21
Iridescent plumage in satin bowerbirds: structure, mechanisms and nanostructural predictors of individual variation in colour. J Exp Biol (2006) 1.94
Masculinized dominant females in a cooperatively breeding species. Mol Ecol (2007) 1.88
The evolution of female ornaments and weaponry: social selection, sexual selection and ecological competition. Philos Trans R Soc Lond B Biol Sci (2012) 1.85
Brains and the city: big-brained passerine birds succeed in urban environments. Biol Lett (2011) 1.61
Dietary carotenoids predict plumage coloration in wild house finches. Proc Biol Sci (2002) 1.55
Social fishes and single mothers: brain evolution in African cichlids. Proc Biol Sci (2009) 1.45
Assortative mating by carotenoid-based plumage colour: a quality indicator in American goldfinches, Carduelis tristis. Naturwissenschaften (2003) 1.36
Relatedness and helping in fish: examining the theoretical predictions. Proc Biol Sci (2005) 1.35
Sexual selection is a form of social selection. Philos Trans R Soc Lond B Biol Sci (2012) 1.27
The evolution of cooperative breeding in the African cichlid fish, Neolamprologus pulcher. Biol Rev Camb Philos Soc (2010) 1.23
Sexual selection determines parental care patterns in cichlid fishes. Evolution (2008) 1.23
Male contest competition and the coevolution of weaponry and testes in pinnipeds. Evolution (2012) 1.20
Rapid sympatry explains greater color pattern divergence in high latitude birds. Evolution (2009) 1.07
Distinct evolutionary patterns of brain and body size during adaptive radiation. Evolution (2009) 1.04
Quantifying the gender load: can population crosses reveal interlocus sexual conflict? Philos Trans R Soc Lond B Biol Sci (2006) 1.03
Maternal influences on population dynamics: evidence from an exploited freshwater fish. Ecology (2010) 1.00
The benefit of evolving a larger brain: big-brained guppies perform better in a cognitive task. Anim Behav (2013) 0.99
Evidence for genetic monogamy and female-biased dispersal in the biparental mouthbrooding cichlid Eretmodus cyanostictus from Lake Tanganyika. Mol Ecol (2003) 0.99
Artificial selection on relative brain size reveals a positive genetic correlation between brain size and proactive personality in the guppy. Evolution (2014) 0.98
Comparative support for the expensive tissue hypothesis: Big brains are correlated with smaller gut and greater parental investment in Lake Tanganyika cichlids. Evolution (2014) 0.96
Extreme sexual brain size dimorphism in sticklebacks: a consequence of the cognitive challenges of sex and parenting? PLoS One (2012) 0.96
Cooperating in the face of uncertainty: a consistent framework for understanding the evolution of cooperation. Behav Processes (2007) 0.94
Brain structure evolution in a basal vertebrate clade: evidence from phylogenetic comparative analysis of cichlid fishes. BMC Evol Biol (2009) 0.94
Sex, ecology and the brain: evolutionary correlates of brain structure volumes in Tanganyikan cichlids. PLoS One (2010) 0.90
Effects of stress and motivation on performing a spatial task. Neurobiol Learn Mem (2010) 0.88
Fight for your breeding right: hierarchy re-establishment predicts aggression in a social queue. Biol Lett (2010) 0.87
Androgens and dominance: sex-specific patterns in a highly social fish (Neolamprologus pulcher). Gen Comp Endocrinol (2009) 0.87
Effects of maternal stress on egg characteristics in a cooperatively breeding fish. Comp Biochem Physiol A Mol Integr Physiol (2010) 0.87
Chemical composition of seminal and ovarian fluids of chinook salmon (Oncorhynchus tshawytscha) and their effects on sperm motility traits. Comp Biochem Physiol A Mol Integr Physiol (2008) 0.86
Motility, ATP levels and metabolic enzyme activity of sperm from bluegill (Lepomis macrochirus). Comp Biochem Physiol A Mol Integr Physiol (2005) 0.85
Evolutionary biology: Why do birds engage in extra-pair copulation? Nature (2003) 0.83
Lateralization in response to social stimuli in a cooperatively breeding cichlid fish. Behav Processes (2010) 0.83
Signatures of contamination in invasive round gobies (Neogobius melanostomus): a double strike for ecosystem health? Ecotoxicol Environ Saf (2010) 0.83
Genetic structure in the coral-reef-associated Banggai cardinalfish, Pterapogon kauderni. Mol Ecol (2005) 0.82
Behavior as biomarker? Laboratory versus field movement in round goby (Neogobius melanostomus) from highly contaminated habitats. Ecotoxicology (2012) 0.81
Color patterns of closely related bird species are more divergent at intermediate levels of breeding-range sympatry. Am Nat (2015) 0.80
Continent-wide variation in feather colour of a migratory songbird in relation to body condition and moulting locality. Biol Lett (2007) 0.80
Probing aggressive motivation during territorial contests in a group-living cichlid fish. Behav Processes (2012) 0.80
Characterization of vitellogenin gene expression in round goby (Neogobius melanostomus) using a quantitative polymerase chain reaction assay. Environ Toxicol Chem (2010) 0.79
Phenotypic integration of brain size and head morphology in Lake Tanganyika Cichlids. BMC Evol Biol (2014) 0.79
Sex differences in cognitive ageing: testing predictions derived from life-history theory in a dioecious nematode. Exp Gerontol (2013) 0.78
The stress response of the highly social African cichlid Neolamprologus pulcher. Physiol Biochem Zool (2009) 0.76
Corticosteroid receptor gene expression is related to sex and social behaviour in a social fish. Comp Biochem Physiol A Mol Integr Physiol (2012) 0.76
Deceptive copulation calls attract female visitors to peacock leks. Am Nat (2014) 0.76
Brains and the city in passerine birds: re-analysis and confirmation of the original result. Biol Lett (2013) 0.75
Reproductive sharing in relation to group and colony-level attributes in a cooperative breeding fish. Proc Biol Sci (2015) 0.75
A comparative study of an innate immune response in Lamprologine cichlid fishes. Naturwissenschaften (2014) 0.75
Critical body residues, Michaelis-Menten analysis of bioaccumulation, lethality and behaviour as endpoints of waterborne Ni toxicity in two teleosts. Ecotoxicology (2014) 0.75
The Preference for Social Affiliation Renders Fish Willing to Accept Lower O2 Levels. Physiol Biochem Zool (1) 0.75
Isolation and characterization of polymorphic microsatellite loci in plainfin midshipman fish. Hereditas (2009) 0.75
METABOLIC COSTS OF EXPOSURE TO WASTEWATER EFFLUENT LEAD TO COMPENSATORY ADJUSTMENTS IN RESPIRATORY PHYSIOLOGY IN BLUEGILL SUNFISH. Environ Sci Technol (2017) 0.75