Sperm competition and melanic polymorphism in the 2-spot ladybird, Adalia bipunctata (Coleoptera, Coccinellidae)

Jong, Peter W. de; Verhoog, Michelle D; Brakefield, Paul M.

doi:10.1038/hdy.1993.26

Cited by 24 publications

(11 citation statements)

References 25 publications

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“…8.4) in the first phase (scenario II) did not change significantly the percentage of melanic morphs in the progeny: 26.2% in comparison with 24.0% in the scenario I. The chance that the last male fertilizes an egg was not increased; this again provides evidence that in A. bipunctata mechanisms have evolved to reduce sperm competition, as was con cluded in the earlier study (de Jong et al, 1993). In the 1998 study, there was a highly significant heterogeneity in the proportion of melanic offspring across families in both scenarios, indicating thus a high incidence of sperm mixing, higher than was shown by the fewer and smaller families in the 1993 study.…”

Section: Sperm Transfer and Competition In Harm Oniaaxyridis And Adsupporting

confidence: 62%

“…In the 2nd phase, however, there was no change compared to the 1993 scenario I: the female was only mated once with a melanic male. The results of this scenario II were compared with those of the scenario I, the same as in the earlier study (de Jong et al, 1993).…”

Section: Sperm Transfer and Competition In Harm Oniaaxyridis And Admentioning

confidence: 99%

“…In an earlier study of A. bipunctata, de Jong et al (1993) performed one type of experiment (scenario I): a virgin typica female was mated once with a typica male (1st phase) and after a week interval with a melanic male (2nd phase). An almost complete second male sperm precedence was recorded, although in several cases the possibility of first male sperm precedence was not com pletely excluded and some evidence for sperm mixing was obtaiined.…”

Section: Sperm Transfer and Competition In Harm Oniaaxyridis And Admentioning

confidence: 99%

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Sexual activity in Coccinellidae (Coleoptera): a review

Hodek¹,

Ceryngier²

2000

Eur. J. Entomol.

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Abstract. Although there are few studies of the sexual life of coccinellids these phenomena have attracted the interest of isolated groups of coccinellidologists. Probably the most important finding is that at least some coccinellid species (Adalia bipunctata and Harmonia axyridis) do not mate at random with the females prefering certain males. This phenomenon was first observed in Adalia bipunctata by Lusis and then studied in detail by Majerus, O'Donald, de Jong and others. In Japan, Harmonia axyridis was similarly studied by Osawa and Ueno. While the former author found that in this species (as in A. bipunctata) the colour of the elytra is most important in mate choice by females, the latter stresses that size and activity are important. Sperm competition is another interesting phenomenon, most often the sperm of the last male fertilizes the eggs (Ueno, Katakura). Obata and Hidaka have contributed in an important way to elucidating the function of the spermatophore in mating. The studies by Hodek and Ceryngier recorded the matura tion and regression of testicular follicles and the relation of mating activity to diapause in four coccinellid species. In contrast to females, where induction of diapause prevents maturation of ovaries, in diapausing males the tissue of testicular follicles remains active until the temperatures decrease in late autumn. Dissection of spermathecae revealed principal difference in autumn mating activity between Coccinella septempunctata, in which 40-60% of the beetles mated before hibernation and Ceratomegilla (syn. Semiadalia) undecimnotata, which does not mate in autumn.

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Section: Sperm Transfer and Competition In Harm Oniaaxyridis And Adsupporting

confidence: 62%

Section: Sperm Transfer and Competition In Harm Oniaaxyridis And Admentioning

confidence: 99%

Section: Sperm Transfer and Competition In Harm Oniaaxyridis And Admentioning

confidence: 99%

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Sexual activity in Coccinellidae (Coleoptera): a review

Hodek¹,

Ceryngier²

2000

Eur. J. Entomol.

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“…1). Ladybirds often mate several times and the sperm of the last male a female copulates with is used to fertilize the eggs (Katakura, 1981;De Jong et al, 1993Ueno, 1994; for the Indian population of this species, see Chaudhary et al, 2016). Therefore, for males there would be few benefi ts from protandry, which may be one of the factors favouring protogyny in C. sexmaculata.…”

Section: Resultsmentioning

confidence: 99%

Protogyny after hibernation and aestivation in Cheilomenes sexmaculata (Coleoptera: Coccinellidae) in central Japan

Kawakami¹,

Yamazaki²,

Ohashi³

2017

Eur. J. Entomol.

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Abstract. Differences in the time of occurrence of both sexes of adult ladybirds, which refl ect differences in the longevity and reproductive strategies of the sexes, is important from the perspective of applied entomology, including biological control, as well as basic entomology. Nevertheless, there is little fi eld census data on this topic. We investigated the seasonal occurrence of both sexes of Cheilomenes sexmaculata (Fabricius) in Osaka City, central Japan, from 2003 to 2011. Female adults tended to appear earlier than males after hibernation or aestivation. That males never appeared earlier than females during the nine year period of this study indicate that protogyny occurs after hibernation and aestivation in this species.

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“…Although two-spotted ladybird life histories are well documented, sperm competition and patterns of sperm precedence are not fully understood in this species (De Jong et al, 1993, 1998. Last-male sperm precedence has been clearly demonstrated in two epilachnin ladybirds (Webb and Smith, 1968;Nakano, 1985).…”

Section: Introductionmentioning

confidence: 99%

Preliminary observations of sperm storage in Adalia bipunctata (Coleoptera: Coccinellidae): sperm size and number

Arnaud¹,

Spinneux²,

Haubruge³

2003

Appl. Entomol. Zool.

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Sperm storage in Adalia bipunctata (L.) (Coleoptera, Coccinellidae) was examined and compared between diapausing and non-diapausing females. We observed that non-diapausing females store on average 13,688 (Ϯ722, S.E.) sperm in their spermatheca and that every female examined had sperm in storage (nϭ16). In contrast, most diapausing females had empty spermatheca and only two had sperm in storage (nϭ15). Mean sperm number in diapausing females was 250 (Ϯ112, S.E.). The mean length of the spermatozoa stored by non-diapausing females was 2,068.5 mm (Ϯ9.8, S.E.), ranging from 1,530.8 to 3,171.7 mm. Sperm length in diapausing females was only measurable in one female and was of 2,102.9 mm (Ϯ22.4, S.E.).

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Sperm competition and melanic polymorphism in the 2-spot ladybird, Adalia bipunctata (Coleoptera, Coccinellidae)

Cited by 24 publications

References 25 publications

Sexual activity in Coccinellidae (Coleoptera): a review

Sexual activity in Coccinellidae (Coleoptera): a review

Protogyny after hibernation and aestivation in Cheilomenes sexmaculata (Coleoptera: Coccinellidae) in central Japan

Preliminary observations of sperm storage in Adalia bipunctata (Coleoptera: Coccinellidae): sperm size and number

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