Paternity displacement in the grasshopper Eyprepocnemis plorans

López-León, María Dolores; Cabrero, J.; Pardo, M. C.; Viseras, E.; Camacho, Juan Pedro M.

doi:10.1038/hdy.1993.173

Cited by 21 publications

(15 citation statements)

References 28 publications

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“…The simplest explanation for the multiple paternity observed in natural populations is the encounter rate theory (Lopez-Leon et al 1993, Daly-Engel et al 2007), which holds that rate of multiple mating should depend on the number of male conspecifics a female encounters over the course of a breeding season. In high density populations, therefore, a female should have more opportunities to encounter males, and the rate of multiple paternity should increase (Kokko & Rankin 2006, Daly-Engel et al 2007).…”

Section: Encounter Rate Theory and Sexual Conflictmentioning

confidence: 99%

Is multiple mating beneficial or unavoidable? Low multiple paternity and genetic diversity in the shortspine spurdog Squalus mitsukurii

Daly‐Engel

Grubbs²,

Feldheim³

et al. 2010

Mar. Ecol. Prog. Ser.

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Proposed benefits of multiple paternity include increased reproductive output, elevated fitness of progeny, and maintenance of population genetic diversity. However, another consideration is whether multiple paternity is simply an unavoidable byproduct of sexual conflict, with males seeking to maximize mating encounters while females seek to minimize the stress of copulation. Here we examined the polyandrous mating system in sharks, with a focus on the reproductive genetics of the shortspine spurdog Squalus mitsukurii. Members of the genus Squalus are long-lived, slow-growing, and employ among the longest gestation periods of any vertebrate. To evaluate multiple paternity and genetic diversity in S. mitsukurii, we genotyped 27 litters plus 96 individuals with 8 microsatellite loci. Further, 670 bp of the mtDNA control region were sequenced in 112 individuals to examine population structure. S. mitsukurii in Hawaii showed low genetic diversity relative to other sharks (π = 0.0010 ± 0.0008) and no significant population structure in the Hawaiian Archipelago. Direct allele counts and Bayesian approximations returned concordant estimates of 11% multiple paternity, the lowest observed in sharks to date. Considering the protracted reproductive interval of S. mitsukurii, sexual conflict that results from differential male and female reproductive strategies may favor the development of female mating avoidance behavior to minimize trauma. In S. mitsukurii this behavior includes segregation of sexes and an asynchronous reproductive cycle.KEY WORDS: Elasmobranch · Polyandry · Control region · Microsatellite DNA · Population structure · Sexual conflict · Sexual segregation · Reproductive strategy Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 403: [255][256][257][258][259][260][261][262][263][264][265][266][267] 2010 females with conventional sex roles (reviewed by Zeh & Zeh 2003). Polyandry (females mating with more than one male) and multiple paternity (a single brood of offspring sired by multiple males) are now recognized as common strategies in widely divergent taxa including amphibians, mammals, reptiles, insects, crustaceans, and fishes (Evans & Magurran 2000, Toonen 2004, Adams et al. 2005, Bretman & Tregenza 2005, Daly-Engel et al. 2006, Dean et al. 2006, Jensen et al. 2006. It is still unclear, however, what roles sexual conflict and intersexual selection might play in polyandrous mating systems.For males, the advantages to having multiple breeding partners are clear: the more females a male inseminates, the more offspring he fathers and the greater his reproductive fitness. The benefits of polyandry to females are less obvious. Potential direct benefits to the female include nuptial gifts or parental care on the part of the male. No direct benefits have been shown in shark mating systems, though there is potential for indirect or genetic benefits through polyandrous mating. If there is little or no opportunity to evaluate males prior to copulation, a f...

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Section: Encounter Rate Theory and Sexual Conflictmentioning

confidence: 99%

Is multiple mating beneficial or unavoidable? Low multiple paternity and genetic diversity in the shortspine spurdog Squalus mitsukurii

Daly‐Engel

Grubbs²,

Feldheim³

et al. 2010

Mar. Ecol. Prog. Ser.

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“…In some spider species, for example, males are unable to determine whether a female has a plug during courtship but fail to successfully copulate when they insert their genitalia (Zimmer et al, ). However, genital plugs can be temporary and can either be ejected during oviposition or simply not persist for long periods (Herberstein et al, ; López‐León et al, ). Instead, males can determine female mating status during copulation based on differences in body size.…”

Section: Discussionmentioning

confidence: 99%

“…There are several explanations as to why males did not exhibit precopulatory choice including that males do not have a reliable precopulatory cue on which to base mate choice or that there is no selection on males to be choosy. The marked difference in copulation duration between mated and unmated females could be attributed to a previous male leaving a physical barrier such as a sperm plug which requires the initiation of copulation to be detected (Herberstein, Wignall, Nessler, Harmer, & Schneider, 2012;López-León, Cabrero, Pardo, Viseras, & Camacho, 1993;Parker, 1970;Zimmer, Schneider, & Herberstein, 2014). In addition, long copulation duration with a previously unmated female might be a form of paternity assurance, for example, mate guarding (Alcock, 1994;Allard, Gobin, & Billen, 2007;Svärd & Wiklund, 1988…”

Section: Discussionmentioning

confidence: 99%

Male mate choice in the chameleon grasshopper (Kosciuscola tristis)

2018

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In many species, males can increase their fitness by mating with the highest quality females. Female quality can be indicated by cues, such as body size, age and mating status. In the alpine grasshopper Kosciuscola tristis, males can be found riding on subadult females early in the season, and as the season progresses, males engage in fights over ovipositing females. These observations suggest that males may be competing for females that are either unmated (early season) or sperm‐depleted (late season). We thus hypothesised that male K. tristis may be choosy in relation to female mating status, and specifically, we predicted that males prefer females that are unmated. We conducted behavioural experiments in which males were given the choice of two females, one mated and one unmated. Contrary to our prediction, males did not mate preferentially with unmated females. However, copulation duration with unmated females was, on average, 24 times the length of copulation with mated females. While female K. tristis can reject mates, we did not observe any evidence of overt female choice during our trials. Females may gain additional benefits from mating multiply and may therefore not readily reject males. While our experiment cannot definitively disentangle female from male control over copulation duration, we suggest that males choose to invest more time in copula with unmated females, perhaps for paternity assurance, and that male mate assessment occurs during copulation rather than beforehand.

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“…Although their effect is certainly not extreme, there is a clear tendency towards a reduction of the number of matings involving individuals with Bs and also delaying the occurrence of the first mating. In a study based on established 19 + 2cr trios of E. plorans, L6pez-Le6n et al (1993) observed a favoured transmission of cytological markers in a second copulation with respect to the first one. Although such analysis was performed to detect paternity displacement, it supports the importance of mating suc- Table 3.…”

Section: Discussionmentioning

confidence: 99%

The effect of B chromosomes on mating success of the grasshopper Eyprepocnemis plorans

1996

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The mating ability ofE. plorans was tested in laboratory conditions in six experimental units composed often males and fifteen females during 31 days. When significant differences were found (three from the six cages, and in totals) they involved a decrease of matings involving males with B chromosomes. The same tendency seems to exist in females, but to a lesser extent, so that a significant effect is only detected when the totals are considered. Accessory chromosomes also delay, in both sexes, the occurrence of the first mating. No mating preferences depending on the number of Bs were detected.

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Paternity displacement in the grasshopper Eyprepocnemis plorans

Cited by 21 publications

References 28 publications

Is multiple mating beneficial or unavoidable? Low multiple paternity and genetic diversity in the shortspine spurdog Squalus mitsukurii

Is multiple mating beneficial or unavoidable? Low multiple paternity and genetic diversity in the shortspine spurdog Squalus mitsukurii

Male mate choice in the chameleon grasshopper (Kosciuscola tristis)

The effect of B chromosomes on mating success of the grasshopper Eyprepocnemis plorans

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