Male fattening is related to increased seminal quality of squirrel monkeys (Saimiri collinsi): Implications for sperm competition
Sign Up to like & getrecommendations! Published in 2021 at "American Journal of Primatology"
DOI: 10.1002/ajp.23353
Abstract: Saimiri are neotropical primates with seasonal reproduction, males develop a seasonal fattening condition that has been suggested as a pre‐copulatory sexual selection strategy. Furthermore, females mate with multiple males in the same season. This could… read more here.
Keywords: sperm competition; saimiri collinsi; fatted males; competition ... See more keywords
A comparison of paternity data and relative testes size as measures of level of sperm competition in the Hominoidea.
Sign Up to like & getrecommendations! Published in 2018 at "American journal of physical anthropology"
DOI: 10.1002/ajpa.23360
Abstract: OBJECTIVES The phrase "level of sperm competition" is used only vaguely in the primate literature. There is also little distinction between the important elements of frequency and intensity of sperm competition, largely because the two… read more here.
Keywords: level sperm; paternity; sperm competition; competition ... See more keywords
Sperm competition in marriage: Semen displacement, male rivals, and spousal discrepancy in sexual interest
Sign Up to like & getrecommendations! Published in 2017 at "Personality and Individual Differences"
DOI: 10.1016/j.paid.2016.09.056
Abstract: Abstract Non-human males attend to the presence of potential sexual rivals in the local environment to assess sperm competition risk, and adjust accordingly the deployment of sperm competition tactics (e.g., performing semen-displacing copulatory behaviors). We… read more here.
Keywords: sperm competition; sexual interest; competition; discrepancy ... See more keywords
Exploring the effects of extreme polyandry on estimates of sexual selection and reproductive success
Sign Up to like & getrecommendations! Published in 2021 at "Behavioral Ecology"
DOI: 10.1093/beheco/arab081
Abstract: Multiple mating by females can dramatically alter selection on males by creating indirect interactions between rivals via sperm competition. Exactly how this behavior alters the relationship between male mating and fertilization success depends on multiple… read more here.
Keywords: sperm competition; exploring effects; selection; success ... See more keywords
Pre- and postcopulatory competition affect testes mass and organization differently in two monophyletic mole-rat species, Georychus capensis and Fukomys damarensis
Sign Up to like & getrecommendations! Published in 2023 at "Journal of Mammalogy"
DOI: 10.1093/jmammal/gyad021
Abstract: Sperm competition results from postcopulatory continuation of male–male competition for paternity. The level of sperm competition is predicted to be highest in species with greater polyandry and weakest in monogamous pairs. Sperm competition levels can… read more here.
Keywords: pre postcopulatory; sperm competition; competition; testes mass ... See more keywords
Paternal diet affects differential gene expression, but not sperm competition, in sons.
Sign Up to like & getrecommendations! Published in 2017 at "Biology letters"
DOI: 10.1098/rsbl.2016.0914
Abstract: Parental environment can widely influence offspring phenotype, but paternal effects in the absence of parental care remain poorly understood. We asked if protein content in the larval diet of fathers affected paternity success and gene… read more here.
Keywords: sperm competition; paternal diet; gene expression;
Variation in the post‐mating fitness landscape in fruit flies
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Evolutionary Biology"
DOI: 10.1111/jeb.13090
Abstract: Sperm competition is pervasive and fundamental to determining a male's overall fitness. Sperm traits and seminal fluid proteins (Sfps) are key factors. However, studies of sperm competition may often exclude females that fail to remate… read more here.
Keywords: success; sperm competition; variation post; fitness ... See more keywords
Sperm competition, but not major histocompatibility divergence, drives differential fertilization success between alternative reproductive tactics in Chinook salmon
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Evolutionary Biology"
DOI: 10.1111/jeb.13199
Abstract: Post‐copulatory sexual selection processes, including sperm competition and cryptic female choice (CFC), can operate based on major histocompatibility (MH) genes. We investigated sperm competition between male alternative reproductive tactics [jack (sneaker) and hooknose (guard)] of… read more here.
Keywords: success; sperm competition; alternative reproductive; fertilization success ... See more keywords
Nonfertilizing sperm in Lepidoptera show little evidence for recurrent positive selection
Sign Up to like & getrecommendations! Published in 2019 at "Molecular Ecology"
DOI: 10.1111/mec.15096
Abstract: Sperm are among the most variable cells in nature. Some of this variation results from nonadaptive errors in spermatogenesis, but many species consistently produce multiple sperm morphs, the adaptive significance of which remains unknown. Here,… read more here.
Keywords: sperm competition; selection; sperm; nonfertilizing sperm ... See more keywords
Sperm competition intensity affects sperm precedence patterns in a polyandrous gift‐giving spider
Sign Up to like & getrecommendations! Published in 2022 at "Molecular Ecology"
DOI: 10.1111/mec.16405
Abstract: Sperm competition drives traits that enhance fertilization success. The amount of sperm transferred relative to competitors is key for attaining paternity. Female reproductive morphology and male mating order may also influence fertilization, however the outcome… read more here.
Keywords: sperm competition; sperm precedence; competition; intensity ... See more keywords
Do Men Produce Higher Quality Ejaculates When Primed With Thoughts of Partner Infidelity?
Sign Up to like & getrecommendations! Published in 2018 at "Evolutionary Psychology"
DOI: 10.1177/1474704918757551
Abstract: Sperm competition theory can be used to generate the hypothesis that men alter the quality of their ejaculates as a function of sperm competition risk. Using a repeated measures experimental design, we investigated whether men… read more here.
Keywords: men produce; sperm competition; quality ejaculates; competition ... See more keywords