FERTILIZATION IN THE TWO‐SPOTTED SPIDER MITE (<i>TETRANYCHUS URTICAE: ACARI</i>)

Helle, W.

doi:10.1111/j.1570-7458.1967.tb00049.x

Cited by 122 publications

(99 citation statements)

References 4 publications

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“…In the absence of virgin females, however, more than half of males copulated with mated females. In T. urticae, when the intervals between first and second copulation were more than 24 h, only the first copulation results in fertilization (Helle 1967). Since mated females used in this study would have copulated more than 1 day before experiments, the male copulation behaviour does not contribute to male fitness directly.…”

Section: Discussionmentioning

confidence: 93%

“…There may be an alternative explanation for the male copulation behaviour. When the intervals between first and second copulation were shorter than 24 h or when the first copulation was disturbed, the second copulation is effective in some cases (Helle 1967;Potter and Wrensch 1978;Satoh et al 2001). Possibly, T. urticae males may not be able to discriminate between females that have recently copulated and those that have copulated earlier, which may motivate the male copulation behaviour.…”

Section: Discussionmentioning

confidence: 99%

“…Since only the first copulation results in fertilization in T. urticae when the intervals between the first and second copulation were more than 24 h (Helle 1967), it is predicted that T. urticae males do not copulate with mated females even in the absence of virgin females. To test this prediction, 30 mated females were prepared in the same manner as described above.…”

Section: Do Males Initiate Copulation With Mated Females?mentioning

confidence: 99%

“…In Tetranychus urticae (Acari: Tetranychidae), when the intervals between first and second copulation were more than 24 h, only the first copulation results in fertilization (Helle 1967). Moreover, mating ability of males is limited (Krainacker and Carey 1989).…”

Section: Introductionmentioning

confidence: 99%

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Males of the two-spotted spider mite attempt to copulate with mated females: effects of double mating on fitness of either sex

Oku

2009

Exp Appl Acarol

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In Tetranychus urticae (Acari: Tetranychidae), when the intervals between first and second copulation are more than 24 h, only the first copulation is effective for females. Therefore, adult males should copulate only with virgin females, but not with females that copulated more than 1 day ago. Indeed, T. urticae males preferred virgin females to mated females under dual choice conditions. In the absence of virgin females, however, 60% of males copulated with mated females (n = 30). Therefore, the effects of male copulation behaviour on male and mated-female fitness were examined, respectively. Since T. urticae is arrhenotokous (i.e., only daughters have genes derived from their father), the proportion of females among the offspring was used as an index of male fitness. After males had lived with/without a mated female, the males were allowed to copulate with a virgin female. The proportion of females among the offspring did not differ between males with and without a female. On the other hand, when mated females lived with an adult male, their egg production was lower than mated females without a male. These results suggest that males do not seem to obtain fitness benefit from the copulation behaviour and that mated females incur a fitness cost due to the male behaviour.

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Do Males Initiate Copulation With Mated Females?mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Males of the two-spotted spider mite attempt to copulate with mated females: effects of double mating on fitness of either sex

Oku

2009

Exp Appl Acarol

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“…First, spider mites show strong first-male sperm precedence (Boudreaux, 1963;Helle, 1967), indicating that secondary matings are less effective and that females do not exhibit cryptic male choice by selecting among sperm of various males for fertilisation of their eggs. This allowed us to manipulate the founder females that were introduced to the competition experiment as follows.…”

Section: Introductionmentioning

confidence: 99%

Testing for reproductive interference in the population dynamics of two congeneric species of herbivorous mites

2014

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When phylogenetically close, two competing species may reproductively interfere, and thereby affect their population dynamics. We tested for reproductive interference (RI) between two congeneric haplo-diploid spider mites, Tetranychus evansi and Tetranychus urticae, by investigating their interspecific mating and their population dynamics when they competed on the same plants. They are both pests of tomato, but differ in the host plant defences that they suppress or induce. To reduce the effect of plant-mediated interaction, we used a mutant tomato plant lacking jasmonate-mediated anti-herbivore defences in the competition experiment. In addition, to manipulate the effect of RI, we introduced founder females already mated with conspecific males in mild RI treatments or founder, virgin females in strong RI treatments (in either case together with heterospecific and conspecific males). As females show first-male sperm precedence, RI should occur especially in the founder generation under strong RI treatments. We found that T. urticae outcompeted T. evansi in mild, but not in strong RI treatments. Thus, T. evansi interfered reproductively with T. urticae. This result was supported by crossing experiments showing frequent interspecific copulations, strong postmating reproductive isolation and a preference of T. evansi males to mate with T. urticae (instead of conspecific) females, whereas T. urticae males preferred conspecific females. We conclude that interspecific mating comes at a cost due to asymmetric mate preferences of males. Because RI by T. evansi can improve its competitiveness to T. urticae, we propose that RI partly explains why T. evansi became invasive in Europe where T. urticae is endemic.

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Fake news? The impact of information mismatch on mating behaviour

Rodrigues,

Magalhães

2024

Ecology and Evolution

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Multiple cues are often used for mate choice in complex environments, potentially entailing mismatches in the information conveyed by different sources. We address the consequences of this information mismatch for receivers using the spider mite Tetranychus urticae, in which virgin females are highly valuable mates compared to mated females, given first male sperm precedence. Accordingly, males are known to prefer virgins and distinguish them using cues from the females themselves and that they leave on the substrate. Whereas cues from females are highly reliable, those left on the substrate may not reflect the real female mating status if females move and/or mate. Here, we tested the consequences of such mismatch by exposing males to mated or virgin females on patches previously impregnated with cues deposited by females of either mating status. Male mating attempts were solely affected by substrate cues while female acceptance and the number of mating events were independently affected by both cues. Copulation duration, in contrast, depended mainly on the mating status of the female, with the number of copulations and the total time spent mating being intermediate in environments with mismatched information. We also show that males incur mating costs, reflected in reduced survival in environments with virgin cues. These results suggest that substrate cues left by females are instrumental for males to find their mates. However, in environments with mismatched information, males may pay survival costs without the associated benefit of mating with virgins, or they may lose opportunities to mate with virgins by responding to substrate cues from mated females. The benefit of using multiple cues will then hinge upon the frequency of information mismatch, which itself should vary with the dynamics of populations.

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FERTILIZATION IN THE TWO‐SPOTTED SPIDER MITE (TETRANYCHUS URTICAE: ACARI)

Cited by 122 publications

References 4 publications

Males of the two-spotted spider mite attempt to copulate with mated females: effects of double mating on fitness of either sex

Males of the two-spotted spider mite attempt to copulate with mated females: effects of double mating on fitness of either sex

Testing for reproductive interference in the population dynamics of two congeneric species of herbivorous mites

Fake news? The impact of information mismatch on mating behaviour

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