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Relevant bibliographies by topics / Sperm competition

Academic literature on the topic 'Sperm competition'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 March 2023

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Journal articles on the topic "Sperm competition"

1

RADWAN, JACEK, and WOJCIECH WITALIŃSKI. "Sperm competition." Nature 352, no. 6337 (August 1991): 671–72. http://dx.doi.org/10.1038/352671b0.

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Wigby, Stuart, and Tracey Chapman. "Sperm competition." Current Biology 14, no. 3 (February 2004): R100—R103. http://dx.doi.org/10.1016/j.cub.2004.01.013.

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3

Hughes, A. L. "Sperm Competition." Bulletin of the Entomological Society of America 33, no. 3 (September 1, 1987): 202–3. http://dx.doi.org/10.1093/besa/33.3.202a.

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André, Gonçalo I., Renée C. Firman, and Leigh W. Simmons. "Phenotypic plasticity in genitalia: baculum shape responds to sperm competition risk in house mice." Proceedings of the Royal Society B: Biological Sciences 285, no. 1882 (July 11, 2018): 20181086. http://dx.doi.org/10.1098/rspb.2018.1086.

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Males are known to adjust their expenditure on testes growth and sperm production in response to sperm competition risk. Genital morphology can also contribute to competitive fertilization success but whether male genital morphology can respond plastically to the sperm competition environment has received little attention. Here, we exposed male house mice to two different sperm competition environments during their sexual development and quantified phenotypic plasticity in baculum morphology. The sperm competition environment generated plasticity in body growth. Males maturing under sperm competition risk were larger and heavier than males maturing under no sperm competition risk. We used a landmark-based geometric morphometric approach to measure baculum size and shape. Independent of variation in body size, males maintained under risk of sperm competition had a relatively thicker and more distally extended baculum bulb compared with males maintained under no sperm competition risk. Plasticity in baculum shape paralleled evolutionary responses to selection from sperm competition reported in previous studies of house mice. Our findings provide experimental evidence of socially mediated phenotypic plasticity in male genitalia.

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Parker, Geoff A., and Jussi Lehtonen. "Gamete evolution and sperm numbers: sperm competition versus sperm limitation." Proceedings of the Royal Society B: Biological Sciences 281, no. 1791 (September 22, 2014): 20140836. http://dx.doi.org/10.1098/rspb.2014.0836.

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Both gamete competition and gamete limitation can generate anisogamy from ancestral isogamy, and both sperm competition (SC) and sperm limitation (SL) can increase sperm numbers. Here, we compare the marginal benefits due to these two components at any given population level of sperm production using the risk and intensity models in sperm economics. We show quite generally for the intensity model (where N males compete for each set of eggs) that however severe the degree of SL, if there is at least one competitor for fertilization ( N − 1 ≥ 1), the marginal gains through SC exceed those for SL, provided that the relationship between the probability of fertilization ( F ) and increasing sperm numbers ( x ) is a concave function. In the risk model, as fertility F increases from 0 to 1.0, the threshold SC risk (the probability q that two males compete for fertilization) for SC to be the dominant force drops from 1.0 to 0. The gamete competition and gamete limitation theories for the evolution of anisogamy rely on very similar considerations: our results imply that gamete limitation could dominate only if ancestral reproduction took place in highly isolated, small spawning groups.

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Engqvist, Leif, and Klaus Reinhold. "Sperm competition games: optimal sperm allocation in response to the size of competing ejaculates." Proceedings of the Royal Society B: Biological Sciences 274, no. 1607 (November 7, 2006): 209–17. http://dx.doi.org/10.1098/rspb.2006.3722.

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Sperm competition theory predicts that when males are certain of sperm competition, they should decrease sperm investment in matings with an increasing number of competing ejaculates. How males should allocate sperm when competing with differently sized ejaculates, however, has not yet been examined. Here, we report the outcomes of two models assuming variation in males' sperm reserves and males being faced with different amounts of competing sperm. In the first ‘spawning model’, two males compete instantaneously and both are able to assess the sperm competitive ability of each other. In the second ‘sperm storage model’, males are sequentially confronted with situations involving different levels of sperm competition, for instance different amounts of sperm already stored by the female mating partner. In both of the models, we found that optimal sperm allocation will strongly depend on the size of the male's sperm reserve. Males should always invest maximally in competition with other males that are equally strong competitors. That is, for males with small sperm reserves, our model predicts a negative correlation between sperm allocation and sperm competition intensity, whereas for males with large sperm reserves, this correlation is predicted to be positive.

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Birkhead, T. R. "Enduring Sperm Competition." Journal of Avian Biology 25, no. 3 (August 1994): 167. http://dx.doi.org/10.2307/3677071.

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Lüke, Lena, Polly Campbell, María Varea Sánchez, Michael W. Nachman, and Eduardo R. S. Roldan. "Sexual selection on protamine and transition nuclear protein expression in mouse species." Proceedings of the Royal Society B: Biological Sciences 281, no. 1783 (May 22, 2014): 20133359. http://dx.doi.org/10.1098/rspb.2013.3359.

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Post-copulatory sexual selection in the form of sperm competition is known to influence the evolution of male reproductive proteins in mammals. The relationship between sperm competition and regulatory evolution, however, remains to be explored. Protamines and transition nuclear proteins are involved in the condensation of sperm chromatin and are expected to affect the shape of the sperm head. A hydrodynamically efficient head allows for fast swimming velocity and, therefore, more competitive sperm. Previous comparative studies in rodents have documented a significant association between the level of sperm competition (as measured by relative testes mass) and DNA sequence evolution in both the coding and promoter sequences of protamine 2. Here, we investigate the influence of sexual selection on protamine and transition nuclear protein mRNA expression in the testes of eight mouse species that differ widely in levels of sperm competition. We also examined the relationship between relative gene expression levels and sperm head shape, assessed using geometric morphometrics. We found that species with higher levels of sperm competition express less protamine 2 in relation to protamine 1 and transition nuclear proteins. Moreover, there was a significant association between relative protamine 2 expression and sperm head shape. Reduction in the relative abundance of protamine 2 may increase the competitive ability of sperm in mice, possibly by affecting sperm head shape. Changes in gene regulatory sequences thus seem to be the basis of the evolutionary response to sexual selection in these proteins.

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Singson, Andrew, Katherine L. Hill, and Steven W. L’Hernault. "Sperm Competition in the Absence of Fertilization in Caenorhabditis elegans." Genetics 152, no. 1 (May 1, 1999): 201–8. http://dx.doi.org/10.1093/genetics/152.1.201.

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Abstract Hermaphrodite self-fertilization is the primary mode of reproduction in the nematode Caenorhabditis elegans. However, when a hermaphrodite is crossed with a male, nearly all of the oocytes are fertilized by male-derived sperm. This sperm precedence during reproduction is due to the competitive superiority of male-derived sperm and results in a functional suppression of hermaphrodite self-fertility. In this study, mutant males that inseminate fertilization-defective sperm were used to reveal that sperm competition within a hermaphrodite does not require successful fertilization. However, sperm competition does require normal sperm motility. Additionally, sperm competition is not an absolute process because oocytes not fertilized by male-derived sperm can sometimes be fertilized by hermaphrodite-derived sperm. These results indicate that outcrossed progeny result from a wild-type cross because male-derived sperm are competitively superior and hermaphrodite-derived sperm become unavailable to oocytes. The sperm competition assays described in this study will be useful in further classifying the large number of currently identified mutations that alter sperm function and development in C. elegans.

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Vuarin, Pauline, Yves Hingrat, Loïc Lesobre, Michel Saint Jalme, Frédéric Lacroix, and Gabriele Sorci. "Sperm competition accentuates selection on ejaculate attributes." Biology Letters 15, no. 3 (March 2019): 20180889. http://dx.doi.org/10.1098/rsbl.2018.0889.

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Ejaculate attributes are important factors driving the probability of fertilizing eggs. When females mate with several males, competition between sperm to fertilize eggs should accentuate selection on ejaculate attributes. We tested this hypothesis in the North African houbara bustard ( Chlamydotis undulata undulata ) by comparing the strength of selection acting on two ejaculate attributes when sperm from single males or sperm from different males were used for insemination. In agreement with the prediction, we found that selection on ejaculate attributes was stronger when sperm of different males competed for egg fertilization. These findings provide the first direct comparison of the strength of selection acting on ejaculate attributes under competitive and non-competitive fertilizations, confirming that sperm competition is a major selective force driving the evolution of ejaculate characteristics.

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Dissertations / Theses on the topic "Sperm competition"

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Siva-Jothy, M. T. "Sperm competition in the odonata." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370301.

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Eady, Paul E. "Sperm competition in Callosobruchus maculatus." Thesis, University of Sheffield, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263760.

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Fryer, Timothy James Osborne. "ESS models of sperm competition." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266803.

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Gilbert, Lucy. "Sperm competition in the western gull." Thesis, University of Sheffield, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389759.

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Cook, Penelope Anne. "Sperm competition in butterflies and moths." Thesis, University of Liverpool, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307641.

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Morrow, Edward Hugh. "The evolution of sperm length." Thesis, University of Liverpool, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367026.

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Lovell-Mansbridge, Claire. "Sperm competition in the feral pigeon Columba livia." Thesis, University of Sheffield, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364193.

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Hunter, Fiona M. "Sperm competition in the Northern fulmar (Fulmaris glacialis)." Thesis, University of Sheffield, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304668.

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Ramm, Steven Andrew. "Sperm competition and its evolutionary consequences in rodents." Thesis, University of Liverpool, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.436259.

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Preston, Brian T. "Sexual selection and sperm competition in Soay sheep." Thesis, University of Stirling, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391526.

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Books on the topic "Sperm competition"

1

Watanabe, Mamoru. Sperm Competition in Butterflies. Tokyo: Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-55945-0.

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Baker, R. R. Human sperm competition: Copulation, masturbation, and infertility. London: Chapman and Hall, 1993.

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3

A, Bellis Mark, ed. Human sperm competition: Copulation, masturbation, and infidelity. London: Chapman & Hall, 1995.

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4

Fu, Peng. Sperm competition and alternative mating tactics in bluegill sunfish. Ottawa: National Library of Canada, 2000.

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5

Promiscuity: An evolutionary history of sperm competition and sexual conflict. London: Faber, 2000.

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6

Ashok, Agarwal, Borges Edson, and Amanda S. Setti. Non-invasive sperm selection for in vitro fertilization: Novel concepts and methods. New York: Springer, 2015.

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7

Watanabe, Mamoru. Sperm Competition in Butterflies. Springer, 2018.

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8

Shackelford, Todd K., and Nicholas Pound, eds. Sperm Competition in Humans. Springer US, 2006. http://dx.doi.org/10.1007/0-387-28039-1.

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Shackelford, Todd K., and Nicholas Pound, eds. Sperm Competition in Humans. Springer US, 2006. http://dx.doi.org/10.1007/978-0-387-28039-4.

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Watanabe, Mamoru. Sperm Competition in Butterflies. Springer London, Limited, 2016.

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Book chapters on the topic "Sperm competition"

1

DeLecce, Tara. "Sperm Competition." In Encyclopedia of Personality and Individual Differences, 5156–58. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-24612-3_1269.

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McKibbin, William F. "Sperm Competition." In Encyclopedia of Evolutionary Psychological Science, 1–3. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-16999-6_73-1.

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DeLecce, Tara. "Sperm Competition." In Encyclopedia of Personality and Individual Differences, 1–3. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-28099-8_1269-1.

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Durrant, Kate L. "Sperm Competition." In Encyclopedia of Animal Cognition and Behavior, 1–14. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-47829-6_438-1.

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Cordero-Rivera, Adolfo. "Sperm Competition." In Reproductive Strategies in Insects, 205–24. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003043195-10.

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McKibbin, William F. "Sperm Competition." In Encyclopedia of Evolutionary Psychological Science, 7859–61. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-19650-3_73.

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Baer, Boris. "Sperm Competition." In Encyclopedia of Social Insects, 872–75. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-28102-1_114.

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Baer, Boris. "Sperm Competition." In Encyclopedia of Social Insects, 1–5. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-90306-4_114-1.

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Durrant, Kate L. "Sperm Competition." In Encyclopedia of Animal Cognition and Behavior, 6620–33. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-319-55065-7_438.

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Kelly, Clint D., and Michael D. Jennions. "Sperm Competition Theory." In Encyclopedia of Evolutionary Psychological Science, 1–16. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-16999-6_1941-1.

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Reports on the topic "Sperm competition"

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Elizur, Abigail, Amir Sagi, Gideon Hulata, Clive Jones, and Wayne Knibb. Improving Crustacean Aquaculture Production Efficiencies through Development of Monosex Populations Using Endocrine and Molecular Manipulations. United States Department of Agriculture, June 2010. http://dx.doi.org/10.32747/2010.7613890.bard.

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Background Most of Australian prawn aquaculture production is based on P. monodon. However, the Australian industry is under intense competition from lower priced overseas imports. The availability of all-female monosex populations, by virtue of their large size and associated premium prize, will offer competitive advantage to the industry which desperately needs to counteract competitors within this market. As for the redclaw production in Israel, although it is at its infancy, the growers realized that the production of males is extremely advantageous and that such management strategy will change the economic assumptions and performances of this aquaculture to attract many more growers. Original objectives (as in original proposal) Investigating the sex inheritance mechanism in the tiger prawn. Identification of genes expressed uniquely in the androgenic gland (AG) of prawns and crayfish. The above genes and/or their products will be used to localize the AG in the prawn and manipulate the AG activity in both species. Production of monosex populations through AG manipulation. In the prawn, production of all-female populations and in the crayfish, all-male populations. Achievements In the crayfish, the AG cDNA library was further screened and a third AG specific transcript, designated Cq-AG3, had been identified. Simultaneously the two AG specific genes, which were previously identified, were further characterized. Tissue specificity of one of those genes, termed Cq-AG2, was demonstrated by northern blot hybridization and RNA in-situ hybridization. Bioinformatics prediction, which suggested a 42 amino acid long signal anchor at the N-terminus of the deduced Cq-AG2, was confirmed by immunolocalization of a recombinant protein. Cq-IAG's functionality was demonstrated by dsRNA in-vivo injections to intersex crayfish. Cq-IAGsilencing induced dramatic sex-related alterations, including male feature feminization, reduced sperm production, extensive testicular apoptosis, induction of the vitellogeningene expression and accumulation of yolk proteins in the ovaries. In the prawn, the AG was identified and a cDNA library was created. The putative P. monodonAG hormone encoding gene (Pm-IAG) was identified, isolated and characterized for time of expression and histological localization. Implantation of the AG into prawn post larvae (PL) and juveniles resulted in phenotypic transformation which included the appearance of appendix masculina and enlarged petasma. The transformation however did not result in sex change or the creation of neo males thus the population genetics stage to be executed with Prof. Hulata did not materialized. Repeated AG implantation is currently being trialed. Major conclusions and Implications, both scientific and agricultural Cq-IAG's involvement in male sexual differentiation had been demonstrated and it is strongly suggested that this gene encodes an AG hormone in this crayfish. A thorough screening of the AG cDNA library shows Cq-IAG is the prominent transcript within the library. However, the identification of two additional transcripts hints that Cq-IAG is not the only gene mediating the AG effects. The successful gene silencing of Cq-IAG, if performed at earlier developmental stages, might accomplish full and functional sex reversal which will enable the production of all-male crayfish populations. Pm-IAG is likely to play a similar role in prawns. It is possible that repeated administration of the AG into prawn will lead to the desired full sex reversal, so that WZ neo males, crossed with WZ females can result in WW females, which will form the basis for monosex all-female population.

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