Sperm motility and energetics

Cummins, Jim

doi:10.1016/b978-0-12-372568-4.00005-7

Cited by 37 publications

(49 citation statements)

References 76 publications

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“…More data are therefore needed. The relationship between flagellum and midpiece lengths has also been considered an important trait, associated with sperm energetic dynamics and sperm function [71]–[73]. It is interesting to note that in the present study neither absolute midpiece length nor its ratio to flagellum length were found to be associated with either type of paternity success.…”

Section: Discussioncontrasting

confidence: 71%

Maintenance of Sperm Variation in a Highly Promiscuous Wild Bird

et al. 2011

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Postcopulatory sexual selection is an important force in the evolution of reproductive traits, including sperm morphology. In birds, sperm morphology is known to be highly heritable and largely condition-independent. Theory predicts, and recent comparative work corroborates, that strong selection in such traits reduces intraspecific phenotypic variation. Here we show that some variation can be maintained despite extreme promiscuity, as a result of opposing, copulation-role-specific selection forces. After controlling for known correlates of siring success in the superb fairy-wren (Malurus cyaneus), we found that (a) lifetime extra-pair paternity success was associated with sperm with a shorter flagellum and relatively large head, and (b) males whose sperm had a longer flagellum and a relatively smaller head achieved higher within-pair paternity. In this species extrapair copulations occur in the same morning, but preceding, pair copulations during a female's fertile period, suggesting that shorter and relatively larger-headed sperm are most successful in securing storage (defense), whereas the opposite phenotype might be better at outcompeting stored sperm (offense). Furthermore, since cuckolding ability is a major contributor to differential male reproductive output, stronger selection on defense sperm competition traits might explain the short sperm of malurids relative to other promiscuous passerines.

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Section: Discussioncontrasting

confidence: 71%

Maintenance of Sperm Variation in a Highly Promiscuous Wild Bird

et al. 2011

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“…human -approx. 10-15 mitochondria per cell), the ATP synthesis needed for motility is mainly generated by glycolysis, the mitochondrial ATP synthesis is mainly required for sustaining plasma membranehomeostasis [7].…”

Section: Discussionmentioning

confidence: 99%

Effects of high ambient temperature on fish sperm plasma membrane integrity and mitochondrial activity — A flow cytometric study

Nagy

Kakasi

Pál

et al. 2016

Acta Biologica Hungarica

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Local extreme climatic conditions occurring as a result of global climate change may interfere with the reproduction of animals. In the present study fish spermatozoa were incubated at different temperatures (20, 25, 30 and 40 °C) for 10 and 30 minutes, respectively and plasma membrane integrity and mitochondrial membrane potential changes were evaluated with flow cytometry using SYBR-14/PI and Mitotracker Deep Red FM fluorescent dyes. No significant differences were found in plasma membrane integrity at either incubation temperatures or time points. Mitotracker Deep Red FM histogram profiles indicating mitochondrial activity showed significant (p < 0.001) alterations in all cases of higher (25, 30 and 40 °C) temperature treatments as compared to the samples incubated at 20 °C. Our results indicate that fish spermatozoa exposed to high temperatures suffer sublethal damage that cannot be detected with conventional, vital staining techniques.

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“…The sperm midpiece contains the mitochondria, which form a helical array, tightly wound around the central strut (axoneme) of the flagellum. Mitochondrial energy production by the midpiece involves oxidative phosphorylation to produce ATP, whereas in the sperm principal piece, energy for motility is generated by glycolysis [Cummins, 2010]. The extent to which these 2 processes govern sperm motility varies considerably among mammals [Bedford and Hoskins, 1990], and it remains unknown how far such variations might reflect phylogenetic factors or the effects of postcopulatory sexual selection.…”

Section: Sperm Production Storage and Morphological Diversitymentioning

confidence: 99%

“…Given the importance of glycolysis for sperm motility in some mammals (e.g., in equids, in the domestic boar and the mouse [Bedford and Hoskins, 1990;Cummins, 2010], much more research will be necessary to determine whether sexual selection has influenced mitochondrial function in the sperm midpiece. Where the primates are concerned, a study of mitochondrial activity in the sperm of chimpanzees and men has produced some useful insights [Anderson et al, 2007].…”

Section: Sperm Production Storage and Morphological Diversitymentioning

confidence: 99%

Copulatory and Postcopulatory Sexual Selection in Primates

Dixson¹

2018

IJFP

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Many aspects of primate reproductive anatomy and physiology have been influenced by copulatory and postcopulatory sexual selection, especially so in taxa where multiple-partner matings by females result in the sperm of rival males competing for access to a given set of ova (sperm competition). However, the female reproductive system also exerts profound effects upon sperm survival, storage and transport, raising the possibility that female traits influence male reproductive success (via cryptic female choice). Current knowledge of sperm competition and cryptic choice in primates and other mammals is reviewed here. The relevance of these comparative studies to our understanding of human reproduction and evolution is discussed.

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Sperm motility and energetics

Cited by 37 publications

References 76 publications

Maintenance of Sperm Variation in a Highly Promiscuous Wild Bird

Maintenance of Sperm Variation in a Highly Promiscuous Wild Bird

Effects of high ambient temperature on fish sperm plasma membrane integrity and mitochondrial activity — A flow cytometric study

Copulatory and Postcopulatory Sexual Selection in Primates

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