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Relevant bibliographies by topics / Sperm guarding

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Academic literature on the topic 'Sperm guarding'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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Journal articles on the topic "Sperm guarding"

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Kelly, Clint D. "Male-biased sex ratios and plasticity in post-insemination behaviour in the New Zealand stick insect Micrarchus hystriculeus." Behaviour 152, no. 5 (2015): 653–66. http://dx.doi.org/10.1163/1568539x-00003247.

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The duration of mate guarding by males is predicted to vary in accordance with the risk of sperm competition or mate encounter rate. Mate guarding is predicted to be prolonged under a male-biased sex ratio because the risk of sperm competition is high or the mate encounter rate is low. A consistently male-biased sex ratio should thus select for greater mate fidelity, and reduced plasticity in guarding behaviour, by males. Micrarchus hystriculeus Westwood (Phasmatodea) is a sexually size dimorphic stick insect in which males form prolonged post-insemination associations with their mates and who

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Fryer, T., C. Cannings, and G. T. Vickers. "Sperm Competition. II—Post-copulatory Guarding." Journal of Theoretical Biology 197, no. 3 (1999): 343–60. http://dx.doi.org/10.1006/jtbi.1998.0879.

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Gullberg, Annica, Mats Olsson, and Hakan Tegelström. "Mate Guarding in Male Sand Lizards (Lacerta Agilis)." Behaviour 133, no. 5-6 (1996): 367–86. http://dx.doi.org/10.1163/156853996x00503.

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AbstractWe investigated factors that may determine mate guarding tactics in male sand lizards. In a sample of lizards from a museum collection, larger males had larger testis, but in laboratory experiments and in a natural population larger males did not sire more offspring. Males with long inter-copulatory intervals were more successful in sperm competition than males with short inter-copulatory intervals. In the wild, the operational sex ratio (OSR, No of receptive females/No of sexually active males) declined throughout the mating season. Mean duration of mate guardings was unaffected by OS

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Del Matto, Lygia A., Renato C. Macedo-Rego, and Eduardo S. A. Santos. "Mate-guarding duration is mainly influenced by the risk of sperm competition and not by female quality in a golden orb-weaver spider." PeerJ 9 (October 22, 2021): e12310. http://dx.doi.org/10.7717/peerj.12310.

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Males are expected to mate with as many females as possible, but can maximize their reproductive success through strategic mating decisions. For instance, males can increase their own fitness by mating with high quality females that produce more offspring. Additionally, males can adjust mating effort based on the relative distribution of females and male competitors. To test factors that influence male mate choice, we assessed male mating decisions in the golden silk orb-weaver spider, Trichonephila clavipes (Nephilidae), a species in which females are polyandrous, males guard females before a

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Carazo, P., E. Font, and B. Alfthan. "Chemosensory assessment of sperm competition levels and the evolution of internal spermatophore guarding." Proceedings of the Royal Society B: Biological Sciences 274, no. 1607 (2006): 261–67. http://dx.doi.org/10.1098/rspb.2006.3714.

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Males of many species adjust their reproductive behaviour according to the perceived risk of sperm competition. Although this phenomenon is widespread in insects and other animals, the mechanisms that allow mates to assess sperm competition levels remain largely unexplored. In this study, we analysed the mating behaviour of pairs of Tenebrio molitor beetles under three odour treatments representing increasing levels of sperm competition risk (SCR) and sperm competition intensity (SCI). Copula duration and male and female post-copulatory behaviour varied significantly with odour treatment. Both

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Sheldon, B. C. "Timing and Use of Paternity Guards By Male Chaffinches." Behaviour 129, no. 1-2 (1994): 79–97. http://dx.doi.org/10.1163/156853994x00361.

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AbstractI studied the relative timing and extent to which male chaffinches used two alternative paternity guards, frequent copulation and mate guarding by close following. Males guarded their mates strongly, and guarding peaked in intensity on day -2 relative to laying. Male mate guarding intensity varied predictably with the value of the female to the male in three ways: (a) guarding intensity increased from day to day as laying approached, as does the risk of a single EPC fertilizing an egg. (b) Males reduced their level of guarding when their females laid the penultimate egg of the clutch a

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Morton, Eugene S. "Variation in Mate Guarding Intensity By Male Purple Martins." Behaviour 101, no. 1-3 (1987): 211–24. http://dx.doi.org/10.1163/156853987x00440.

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AbstractThe frequency with which individual male purple martins (Hirundinidae: Progne subis) guard their mates during forays to gather nest material varies from 0 to 100%. During such forays, guarding males accompany their mates continuously from the time a female leaves the nest site until she returns to the nest site with nest material. Non-guarding males do not accompany females on these collecting forays. Unguarded females are subject to forced extrapair copulation attempts on almost all of their forays to collect nest material. Because this suggested that non-guarding males may have a low

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Arundell, Katherine L., Nina Wedell, and Alison M. Dunn. "Perceived risk of sperm competition affects sperm investment in a mate-guarding amphipod." Animal Behaviour 87 (January 2014): 231–38. http://dx.doi.org/10.1016/j.anbehav.2013.11.005.

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Liljedal, Ståle, and Ivar Folstad. "Milt quality, parasites, and immune function in dominant and subordinate Arctic charr." Canadian Journal of Zoology 81, no. 2 (2003): 221–27. http://dx.doi.org/10.1139/z02-244.

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Within a species, different males may display different mating strategies. For example, some males may be selected to invest in attractiveness and mate guarding, whereas others are selected for increased sperm production and sneaky breeding. In systems with a hierarchical structure, dominant males are expected to adopt mate-guarding behaviour and subordinate males sneaky-breeding behaviour. In this study, we kept wild-caught and sexually ripe male Arctic charr (Salvelinus alpinus) in size-matched pairs and determined social rank from the number of aggressive encounters. After 4 days, subordina

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Storey, Anne E., Roberta J. French, and Ronald Payne. "Sperm Competition and Mate Guarding in Meadow Voles (Microtus pennsylvanicus)." Ethology 101, no. 4 (2010): 265–79. http://dx.doi.org/10.1111/j.1439-0310.1995.tb00364.x.

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Dissertations / Theses on the topic "Sperm guarding"

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Arnqvist, Göran. "Sexual selection and intersexual conflicts in water striders." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 1992. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-101307.

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Dagg, Joachim. "Strategies of sexual reproduction in aphids." Doctoral thesis, [S.l.] : [s.n.], 2002. http://webdoc.sub.gwdg.de/diss/2002/dagg/dagg.pdf.

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Andersson, Sandra, and Julia Salomonsson. "Ungas perspektiv på föräldraskap och ursprung : Reflektioner från unga vuxna tillkomna genom könscellsdonation och/eller uppvuxna i regnbågsfamiljer." Thesis, Linköpings universitet, Psykologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150160.

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Denna examensuppsats har ämnat undersöka ungdomars och unga vuxnas perspektiv på och upplevelser av föräldraskap och genetiskt ursprung samt aktuell föräldralagstiftning. Examensuppsatsen ämnar vidare utgöra underlag för en rapport som beaktas i en statlig utredning som handlar om att se över aktuella regler kring fastställande av rättsligt föräldraskap. Genom semistrukturerade intervjuer med tio unga vuxna i åldern 17 till 32 år har data samlats in och analyserats med tematisk analys. I resultaten fann vi att deltagarnas sätt definiera och tala om föräldraskap är i linje med tidigare forsknin

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"Mate guarding intensity in relation to degree of potential sperm competition in the orb weaving spider Nephila clavipes (Araneae: Tetragnathidae)." Tulane University, 2006.

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Sperm competition theory predicts males should guard their mates with greater intensity when there is a higher risk of losing fertilizations. This relationship was tested in a spider, Nephila clavipes, first by evaluating factors (female age, mating status and duration of copulation with first male) that could affect the potential for sperm competition (likelihood of polyandry and sperm release by mating males) and second by relating this potential to intensity of post copulatory guarding. Female mating status influenced the potential for sperm competition (Study 1), but age did not when remat

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Book chapters on the topic "Sperm guarding"

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Wright, Brianna M., Eva H. Stredulinsky, and John K. B. Ford. "Sex in Killer Whales: Behavior, Exogamy, and the Evolution of Sexual Strategies in the Ocean’s Apex Predator." In Sex in Cetaceans. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-35651-3_16.

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AbstractWe present the current available knowledge about sexual behavior and mating systems in the killer whale, Orcinus orca, focusing primarily on the most well-studied ecotype, the Residents of the eastern North Pacific. Resident killer whales display lifetime natal philopatry of both sexes and thus form stable social groupings organized along maternal lines. Inbreeding is minimized via exogamous mating during multigroup aggregations that are diffusely seasonal. Male reproductive success in Residents is highly skewed, likely as a result of female mate choice or possibly intrasexual contest

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Becker, Carola, and Raymond T. Bauer. "Multiple Matings and Sperm Competition." In Reproductive Biology. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190688554.003.0012.

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In polyandrous mating systems, females mate multiple times and males have evolved adaptations for sperm competition which increase the number and fitness of their offspring. Mate guarding is a widespread monopolization strategy in groups where female receptivity is temporally restricted and often associated with the molt. Precopulatory guarding occurs in branchipods, copepods, peracarids and decapods. Postcopulatory guarding is notable in numerous brachyurans with males protecting females until her exoskeleton has hardened. During copulation, male success in fertilization depends on an effecti

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Vogt, Günter, Rickey D. Cothran, Mika M. J. Tan, and Martin Thiel. "Crustacean Reproductive Records." In Reproductive Biology. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190688554.003.0019.

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Crustacean reproductive traits are highly diverse, and this chapter illustrates some of the most extreme cases, placing them in the context of the more typical crustaceans. It highlights, for example, the male and female records of size and age, the “hottest” and “coolest” reproducers, the longest penises, the largest sperm and eggs, the smallest and largest brood sizes, the longest mate guarding, the most massive sexually selected weapons, the flashiest courtship, the most fathers per brood, the longest incubation of broods, the smallest and largest larvae, the longest larval duration, the lo

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Nordell, Shawn E., and Thomas J. Valone. "Mating Behavior." In Animal Behavior. Oxford University Press, 2024. http://dx.doi.org/10.1093/hesc/9780197666913.003.0012.

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This chapter examines the mating behavior of animals. It also uses the Parker model to expound on the evolution of anisogamy. On the other hand, parental investment theory predicts that the sex investing more time and energy on the offspring can benefit by being selective in its choice of mates. On the other hand, sexual selection can happen after mating via sperm competition and mate guarding of animals. The chapter also notes mate choice copying wherein the choice is impacted by the decision of other animals' mating decisions. Additionally, mating choice can evolve as an indirect benefit to

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Nordell, Shawn E., and Thomas J. Valone. "Mating Behaviour." In Animal Behaviour. Oxford University Press, 2021. http://dx.doi.org/10.1093/hesc/9780190924263.003.0012.

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This chapter examines the mating behavior of animals. It also uses the Parker model to expound on the evolution of anisogamy. On the other hand, parental investment theory predicts that the sex investing more time and energy on the offspring can benefit by being selective in its choice of mates. On the other hand, sexual selection can happen after mating via sperm competition and mate guarding of animals. The chapter also notes mate choice copying wherein the choice is impacted by the decision of other animals' mating decisions. Additionally, mating choice can evolve as an indirect benefit to

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McLay, Colin L., and Stefan Dennenmoser. "Detecting Cryptic Female Choice in Decapod Crustaceans." In Reproductive Biology. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190688554.003.0013.

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Decapod Crustacea (shrimps, lobsters, and crabs) employ a range of different reproductive mechanisms that affect paternity, but does it include cryptic female choice (CFC)? This chapter focuses on events surrounding the fertilization of an egg by a sperm and the opportunities where cryptic fertilization bias might occur. It presents a new model of decapod fertilization, defined in terms of space and time to fertilization. Females have several ways to store sperm and influence fertilization outcomes, which should be affected by (1) their growth pattern (indeterminate or determinate), (2) the li

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Andren, Claes, Goran Nilson, Mats Hoggren, and Ihakan Tegelstrom. "Reproductive strategies and sperm competition in the adder, Vipera berus." In Venomous Snakes. Oxford University PressOxford, 1996. http://dx.doi.org/10.1093/oso/9780198549864.003.0010.

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Abstract Reproduction in temperate snakes shows large variation. In males the reproductive cycle is annual, while females have a biennial or longer cycle depending on species and environmental conditions. Ovulation (fertilization) is temporally separated from copulation, allowing sperm competition in polyandric species. This system can, however, be violated by male-mediated renal sex secretion reducing sperm transfer from later matings by contraction of posterior uteri, or by a copulatory plug. Matings can be restricted to one spring or autumn period or can be biannual. Short-term sperm storag

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Raimondo, Salvatore, Mariacira Gentile, Tommaso Gentile, and Luigi Montano. "Presence of p53 Protein on Spermatozoa DNA: A Novel Environmental Bio-Marker and Implications for Male Fertility." In P53 - A Guardian of the Genome and Beyond [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99559.

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Many studies suggest a direct relationship between toxic effects and an increase in the p53 protein on cellular DNA. For our studies, we used sperm DNA as an indicator of environmental toxic effects, dosing p53 quantitatively. To assess possible variations, we used semen samples from two homogeneous male groups living permanently in areas with different environmental impact. The toxic effects of the selected high environmental impact area are caused by both soil and air pollution, while the selected low environmental impact area is a nature reserve where there are no landfills, but only rural

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