Number of mating males and mating interval affect last-male sperm precedence in Tenebrio molitor L.

2003 ◽  
Vol 66 (2) ◽  
pp. 349-357 ◽  
Author(s):  
Jenny M Drnevich
Keyword(s):  
Tenebrio Molitor ◽  
Sperm Precedence ◽  
Male Sperm ◽  
Mating Interval

scholarly journals Costs and benefits of mating with fertilized females in a species with first male sperm precedence

2018 ◽  
Author(s):  
Leonor R Rodrigues ◽  
Alexandre RT Figueiredo ◽  
Thomas Van Leeuwen ◽  
Isabelle Olivieri ◽  
Sara Magalhães
Keyword(s):  
Sperm Precedence ◽  
Costs And Benefits ◽  
Male Sperm ◽  
Mating Costs ◽  
Mixed Paternity ◽  
Additional Costs ◽  
Males And Females ◽  
Mating Interval ◽  
The Stability ◽  
Open Question

SummaryDifferent patterns of sperm precedence are expected to result in specific mating costs and benefits for each sex, generating different selection pressures on males and females. However, most studies concern species with mixed paternity or last male sperm precedence, neglecting species with first male sperm precedence, in which only the first mating is effective.Here, we measured costs and benefits of multiple mating for both sexes of the spider mite Tetranychus urticae. First, we assessed the stability of the sperm precedence pattern, by mating females to one, two or several males, immediately after the first mating or 24 hours later. We found complete first male precedence, independently of the mating interval and the number of matings. Females paid a cost of polyandry, as multiply-mated females laid fewer eggs than once-mated females. However, while first males had reduced survival when exposed to an intermediate number of virgin females, second males paid no additional costs by matings with several mated females. Moreover, by mating multiply with mated females, males decreased the total number of offspring sired by first males, which suggests that these matings may entail a relative benefit for second males, despite being ineffective.Our results show that complex costs and benefits may arise in males in species with first male precedence. How these costs and benefits affect the maintenance of selection for polyandry remains an open question.

scholarly journals Costs and benefits of multiple mating in a species with first‐male sperm precedence

2020 ◽  
Vol 89 (4) ◽  
pp. 1045-1054 ◽  
Author(s):  
Leonor R. Rodrigues ◽  
Alexandre R. T. Figueiredo ◽  
Thomas Van Leeuwen ◽  
Isabelle Olivieri ◽  
Sara Magalhães
Keyword(s):  
Multiple Mating ◽  
Sperm Precedence ◽  
Costs And Benefits ◽  
Male Sperm

scholarly journals Spontaneous male death and monogyny in the dark fishing spider

2013 ◽  
Vol 9 (4) ◽  
pp. 20130113 ◽  
Author(s):  
Steven K. Schwartz ◽  
William E. Wagner ◽  
Eileen A. Hebets
Keyword(s):  
Sex Ratio ◽  
Virgin Female ◽  
Theoretical Work ◽  
Life History Strategies ◽  
Sperm Precedence ◽  
Field Observations ◽  
Genital Mutilation ◽  
Male Sperm ◽  
Biased Sex Ratio ◽  
Fishing Spider

Monogyny (male monogamy) is found in a diverse assemblage of taxa, and recent theoretical work reveals that a male-biased sex ratio can favour the evolution of this relatively rare mating system. We integrate this theoretical framework with field observations and laboratory experiments involving the sexually size dimorphic fishing spider, Dolomedes tenebrosus , to test the prediction that this species exhibits monogyny. Field surveys revealed a male-biased sex ratio, likely resulting from different life-history strategies (early male maturation). Results from mating trials supported our prediction of monogyny as we discovered that males mate with a single female. Unexpectedly, however, we observed that mating results in obligate male death and genital mutilation. Additional field observations of released individuals suggest that males are not limited by their ability to encounter additional females. Controlled laboratory assays demonstrated that males discriminate among virgin and non-virgin female silk cues, consistent with predictions of first-male sperm precedence. In summary, we report a novel case of male self-sacrifice in a species that exhibits female-biased sexual size dimorphism, male-biased sex ratio, genital mutilation and a suggestion of first-male sperm precedence; all of which are consistent with theoretical predictions of the evolution of monogyny.

Male Competition over Access to Females in a Spider with Last-Male Sperm Precedence

Ethology ◽  
2003 ◽  
Vol 109 (5) ◽  
pp. 385-400 ◽  
Author(s):  
Daniela Schaefer ◽  
Gabriele Uhl
Keyword(s):  
Male Competition ◽  
Sperm Precedence ◽  
Male Sperm
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