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Relevant bibliographies by topics / Copulatory mechanism

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Academic literature on the topic 'Copulatory mechanism'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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Journal articles on the topic "Copulatory mechanism"

1

Wei, Zheng, Xin Tong, and Bao-Zhen Hua. "How Does the Male Penisfilum Enter the Female Copulatory Pore in Hangingflies?" Insects 11, no. 2 (2020): 123. http://dx.doi.org/10.3390/insects11020123.

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Hangingflies are characterized by the interesting nuptial feeding behavior and unusual belly-to-belly hanging mating position. However, the mating behavior and the copulatory mechanism remain poorly known for Bittacidae, especially how the elongated male penisfilum enters the copulatory pore of the female. In this study, the mating behavior and copulatory mechanism of Terrobittacus implicatus (Huang and Hua, 2006) were investigated to reveal the functional morphology of hangingfly genitalia. The results show that the male provides a prey as a nuptial gift to the female and twists his abdomen a

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2

Huber, Bernhard A. "Genital mechanics and sexual selection in the spider Nesticus cellulanus (Araneae: Nesticidae)." Canadian Journal of Zoology 71, no. 12 (1993): 2437–47. http://dx.doi.org/10.1139/z93-340.

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The spider Nesticus cellulanus (Clerck, 1758) was investigated with respect to the functional morphology of its genital organs, using for the first time the method of freeze-fixation of the spiders in copula by liquid nitrogen and subsequent preparation of serial sections of the copulatory organs in functional contact. Use of this method provides new and detailed insights into the function of complex genitalia. Previous ideas, based on artificial expansion of the male copulatory bulbs and simulation experiments, must be rejected or doubted. The role of female choice as a universal cause of spe

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3

Shrenker, P., and A. Bartke. "Effects of hyperprolactinaemia on male sexual behaviour in the golden hamster and mouse." Journal of Endocrinology 112, no. 2 (1987): 221–28. http://dx.doi.org/10.1677/joe.0.1120221.

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ABSTRACT In the male rat, hyperprolactinaemia is associated with significant reductions in plasma LH and FSH levels and in several measures of copulatory behaviour. In contrast to this situation, experimental induction of hyperprolactinaemia in male mice and hamsters is associated with an increase in plasma gonadotrophin levels. It was therefore of interest to determine the effects of hyperprolactinaemia on the copulatory behaviour of these animals. Hyperprolactinaemia was induced by transplantation of pituitaries from adult females and sexual behaviour was tested in the presence of ovariectom

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4

Long, Dan-Wen, and Xin Tong. "Copulatory mechanism and genital coupling of the longhorn beetle Moechotypa diphysis (Coleoptera, Cerambycidae)." ZooKeys 1234 (April 17, 2025): 275–90. https://doi.org/10.3897/zookeys.1234.140491.

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The function of insect external genitalia has played a significant role in exploring insect mating mechanisms and male fertilization strategies. However, due to the privacy of genital coupling, insect copulatory mechanisms have only been investigated in a few insect groups. In this study, we observed the mating behavior using freeze-fixated pairs in copula to reveal the copulatory mechanism of the longhorn beetle Moechotypa diphysis (Pascoe, 1871). At the beginning stage of mating, the male M. diphysis usually takes 30 min to control the female and then extends its median lobe and endophallus.

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5

Rugman-Jones, Paul F., and Paul E. Eady. "Conspecific sperm precedence in Callosobruchus subinnotatus (Coleoptera: Bruchidae): mechanisms and consequences." Proceedings of the Royal Society B: Biological Sciences 274, no. 1612 (2007): 983–88. http://dx.doi.org/10.1098/rspb.2006.0343.

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Conspecific sperm precedence (CSP) has been identified as an important post-copulatory, pre-zygotic mechanism that can act to reduce gene flow between populations. The evolution of CSP is thought to have arisen as a by-product of male and female coevolution in response to intraspecific post-copulatory sexual selection. However, little is known about the mechanisms that generate CSP. When Callosobruchus subinnotatus females copulate with both C. subinnotatus and Callosobruchus maculatus males, regardless of mating order, the majority of eggs are fertilized by conspecific sperm. The low number o

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6

Helna, A. K., and Sudha Kappalli. "Male and female reproductive systems of the pseudocycnid copepod Cybicola armatus (Bassett-Smith, 1898) (Siphonostomatoida) infecting the commercially important scombrid fish Scomberomorus commerson: a light and electron microscopic study." Crustaceana 95, no. 5-6 (2022): 533–52. http://dx.doi.org/10.1163/15685403-bja10204.

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Abstract Cybicola armatus (Bassett-Smith, 1898), a host-specific parasitic copepod, massively infects gill filaments of the scombrid fish, Scomberomorus commerson. While the female attaches to the host fish’s gills, the relatively small-sized male prefers to attach to the female genital somite in copulatory position. To our knowledge this is the first report on the structural features of male and female reproductive organs of C. armatus, a pseudocycnid parasite, using morphological, histological, histochemical and ultrastructural parameters. In males, the sac-like testis is followed by a highl

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7

Cross, Ericha, та Charles E. Roselli. "17β-Estradiol rapidly facilitates chemoinvestigation and mounting in castrated male rats". American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 276, № 5 (1999): R1346—R1350. http://dx.doi.org/10.1152/ajpregu.1999.276.5.r1346.

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Testosterone and estradiol act synergistically to stimulate male sexual behavior. Previous studies demonstrated that testosterone’s actions are mediated genomically. Attempts to show that estradiol acts in a similar fashion have been inconclusive. However, estrogens have been shown to exert short-latency effects by acting directly on neuronal membranes. The present experiment examined whether testosterone or estradiol rapidly facilitates copulatory behaviors in castrated sexually experienced rats. Within 35 min of administration, estradiol stimulated chemoinvestigation and frequency of mountin

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8

Long, Dan-Wen, and Xin Tong. "Copulatory mechanism and genital coupling of the longhorn beetle Moechotypa diphysis (Coleoptera, Cerambycidae)." ZooKeys 1234 (April 17, 2025): 275–90. https://doi.org/10.3897/zookeys.1234.140491.

Full text

Abstract:

The function of insect external genitalia has played a significant role in exploring insect mating mechanisms and male fertilization strategies. However, due to the privacy of genital coupling, insect copulatory mechanisms have only been investigated in a few insect groups. In this study, we observed the mating behavior using freeze-fixated pairs in copula to reveal the copulatory mechanism of the longhorn beetle <i>Moechotypa diphysis</i> (Pascoe, 1871). At the beginning stage of mating, the male <i>M. diphysis</i> usually takes 30 min to control the female and then extends its median lobe an

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9

Simmons, Leigh W., Geoff A. Parker, and David J. Hosken. "Evolutionary insight from a humble fly: sperm competition and the yellow dungfly." Philosophical Transactions of the Royal Society B: Biological Sciences 375, no. 1813 (2020): 20200062. http://dx.doi.org/10.1098/rstb.2020.0062.

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Studies of the yellow dungfly in the 1960s provided one of the first quantitative demonstrations of the costs and benefits associated with male and female reproductive behaviour. These studies advanced appreciation of sexual selection as a significant evolutionary mechanism and contributed to the 1970s paradigm shift toward individual selectionist thinking. Three behaviours in particular led to the realization that sexual selection can continue during and after mating: (i) female receptivity to remating, (ii) sperm displacement and (iii) post-copulatory mate guarding. These behaviours either g

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Fänger, Harald, and Clas M. Naumann. "Genital Morphology and Copulatory Mechanism inZygaena trifolii(Esper, 1783) (Insecta, Lepidoptera, Zygaenidae)." Acta Zoologica 79, no. 1 (1998): 9–24. http://dx.doi.org/10.1111/j.1463-6395.1998.tb01138.x.

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Dissertations / Theses on the topic "Copulatory mechanism"

1

Rugman-Jones, Paul F. "Mechanisms and consequences of post-copulatory sexual selection in the Bruchidae." Thesis, University of Sunderland, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269163.

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Friesen, Christopher R. "Patterns and mechanisms : postcopulatory sexual selection and sexual conflict in a novel mating system." Thesis, 2012. http://hdl.handle.net/1957/36205.

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Postcopulatory sexual selection—sperm competition and cryptic female choice—has become a major area of research over the past 40 years. Within this field there are many outstanding questions at every level of analysis, from proximate to ultimate. The fitness consequences for both sexes in the period after copulation and before fertilization are considerable, but are obscured within the female reproductive tract. Our understanding of postcopulatory mechanisms is especially sparse in taxa other than birds and insects. Nearly nothing is known in reptiles except that multiple paternity is common a

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Books on the topic "Copulatory mechanism"

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Olzer, Rachel, Rebecca L. Ehrlich, Justa L. Heinen-Kay, Jessie Tanner, and Marlene Zuk. Reproductive behavior. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198797500.003.0013.

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Sex and reproduction lie at the heart of studies of insect behavior. We begin by providing a brief overview of insect anatomy and physiology, followed by an introduction to the overarching themes of parental investment, sexual selection, and mating systems. We then take a sequential approach to illustrate the diversity of phenomena and concepts behind insect reproductive behavior from pre-copulatory mate signalling through copulatory sperm transfer, mating positions, and sexual conflict, to post-copulatory sperm competition, and cryptic female choice. We provide an overview of the evolutionary

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2

Everitt, Barry J. Sexual motivation: A neural and behavioural analysis of the mechanisms underlying appetitive and copulatory responses of male rats. 1990.

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Book chapters on the topic "Copulatory mechanism"

1

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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Conference papers on the topic "Copulatory mechanism"

1

Fukuda, Katsuto. "Mechanism of stable polymorphism of antennal segments number: Trade-off between pre- and post-copulatory fitness in a seed beetle species." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.113501.

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