Results 41 to 50 of about 1,124,248 (284)
Sexual selection in a transparent worm : insights from fluorescent sperm [PDF]
, 2015 Sexual selection is a potent source of selection underlying the evolution of sexual dimorphism, reproductive strategies and mating systems. Although sexual selection was initially thought to occur exclusively at the pre-copulatory stage (e.g., contests ...
Marie-Orleach, Lucas
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Rival seminal fluid induces enhanced sperm motility in a polyandrous ant
BMC Evolutionary Biology, 2018 Background Promiscuous mating and sperm competition often induce arms races between the sexes with detrimental outcomes for females. However, ants with multiply-inseminated queens have only a single time-window for sperm competition and queens are ...
Joanito Liberti +2 more
doaj +1 more source
Frontiers in Ecology and Evolution, 2023 Kin selection on one hand, and gamete interactions in post-ejaculatory sexual selection on the other are two major research themes that have risen to prominence over the past half century and have simultaneously developed into central fields of research ...
Lauri Myllymaa, Jussi Lehtonen
doaj +1 more source
Sperm Viability Matters in Insect Sperm Competition [PDF]
Current Biology, 2005 Experimental studies in insects have shown how sperm competition can be a potent selective force acting on an array of male reproductive traits . However, the role of sperm quality in determining paternity in insects has been neglected, despite the fact that sperm quality has been shown to influence the outcome of sperm competition in vertebrates .
Garcı́a-González, Francisco +1 more
openaire +2 more sources
Sperm competition and sperm length in shorebirds [PDF]
, 1999 We investigated how sperm morphology varies across 16 species of shorebirds in the Scolopacidae, Charadriidae, and Jacanidae. Sperm were significantly longer in nonmonogamous than in socially monogamous species.
Briskie, J V, Johnson, D D P
core
Magnetically Actuated Microrobot for Drug Delivery: Current Progress and Challenges
Advanced Robotics Research, EarlyView.Magnetically actuated microrobots are reshaping targeted drug delivery through wireless propulsion, programmable materials, and localized therapeutic release. This review examines how fabrication, body material selection, structural architecture, loading mechanisms, and imaging‐guided control converge to enable microrobotic therapies while identifying ...
Yang Yang, David J. Cappelleri
wiley +1 more source
Impact of low sperm competition on male reproductive trait allometries in a bush-cricket
BMC Evolutionary Biology, 2019 Background Studying reproductive trait allometries can help to understand optimal male investment strategies under sexual selection. In promiscuous mating systems, studies across several taxa suggest that testes allometry is usually positive, presumably ...
Lennart Winkler +3 more
doaj +1 more source
Sperm removal during copulation confirmed in the oldest extant damselfly, Hemiphlebia mirabilis [PDF]
PeerJ, 2016 Postcopulatory sexual selection may favour mechanisms to reduce sperm competition, like physical sperm removal by males. To investigate the origin of sperm removal, I studied the reproductive behaviour and mechanisms of sperm competition in the only ...
Adolfo Cordero-Rivera
doaj +2 more sources
Advanced Science, EarlyView.This study unveils a novel antibacterial mechanism against MRSA, in which the compound Py‐27 selectively targets and inhibits aspartate transcarbamoylase (ATCase), a key enzyme in pyrimidine synthesis. This inhibition disrupts DNA replication, induces oxidative damage, leading to potent bactericidal activity.
Xiaorong Yang +11 more
wiley +1 more source
Sperm competition and male forceps dimorphism in the European earwig Forficula auricularia (Dermaptera: Forficulina) [PDF]
, 2008 Some portions of this electronic text have been removed owing to copyright restrictionsThe European earwig exhibits a remarkable male-dimorphism in forceps morphology that is associated with alternative reproductive tactics under the control of a ...
Brown, Gordon S.
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