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Xiaoguo Jiao - One of the best experts on this subject based on the ideXlab platform.
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experimental evidence for the genetic benefits of female mate choice in the Monandrous wolf spider pardosa astrigera
Animal Behaviour, 2018Co-Authors: Lelei Wen, Jian Chen, Xiaoguo JiaoAbstract:Material and/or genetic benefits are hypothesized to be the main drivers of female mate choice. Research on female mate choice has mainly focused on polyandrous species and has seldom considered Monandrous species. Given the absence of postcopulatory mate choice in Monandrous females, we predicted that precopulatory mate choice is important for Monandrous species. Using the wolf spider Pardosa astrigera as a model Monandrous species, we compared mating, reproductive output and offspring fitness between females with preferred mates (mates that were accepted on the first exposure) and females with nonpreferred mates (mates that were rejected on the first exposure but were induced to mate on the second exposure). Our results showed that the mating duration, latency to egg laying and to egg hatching, fecundity and egg hatching rate did not differ significantly between females with preferred versus nonpreferred mates. In contrast, female and male development time was significantly shorter and female carapace width was significantly greater for offspring of females with preferred versus nonpreferred mates. In addition, survival from egg hatching to maturity was twice as high for offspring of females with preferred mates. These results indicate that female mate choice by the Monandrous P. astrigera provides genetic rather than material benefits.
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silk mediated male courtship effort in the Monandrous wolf spider pardosa astrigera araneae lycosidae
Chemoecology, 2015Co-Authors: Rong Xiao, Yueli Yun, Jian Chen, Bo Chen, Yancong Wang, Xiaoguo JiaoAbstract:In nature, male wolf spiders may encounter silk of conspecific females, males, and/or both. It is generally accepted that males are able to discriminate maturity, sex, and mating status through silk-mediated chemical information of females. However, whether males can discriminate silk by chemical cues among virgin females of different post-maturation ages and between female silk with and without previously being occupied by other males remains largely unexplored. Given that female sexual receptivity increases in post-maturation, males are predicted to prefer old over young virgin females, and are able to discriminate silk of females which have and have not been previously being occupied by other males. In this study, we used the Monandrous wolf spider, Pardosa astrigera, to test this prediction experimentally. When males were exposed to the silk of virgin females of different post-maturation ages (1-, 3-, and 6-day-old females), we found no significant differences in male courtship latency and courtship intensity to female silk across the different ages. However, males displayed significantly higher courtship intensity to the silk of females without being previously occupied by other males than to the silk of females with being previously occupied by other males. When males were directly exposed to virgin females, significantly higher courtship intensity was detected in males in response to 6-day-old females compared with 1-day-old ones. Thus, our results suggest that P. astrigera males can discriminate females using chemical cues from silk that has been previously occupied by other males and to older females with higher sexual receptivity, whereas they invest less to silk cues from virgin females regardless of their post-maturation ages.
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male remating and female fitness in the wolf spider pardosa astrigera the role of male mating history
Behavioral Ecology and Sociobiology, 2011Co-Authors: Xiaoguo Jiao, Fengxiang Liu, Zhanqi Chen, Jian ChenAbstract:Although the effects of male mating history on female reproductive output and longevity have been studied in insects, few such studies have been carried out in spiders. In a mating system in which females are Monandrous while males are polygynous, females may incur the risk by mating with successful males that have experienced consecutive matings and suffer from the possible depletion of sperm and/or associated ejaculates. Here, we examine the effects of male mating history on male courtship and copulation duration, female reproductive fitness, and female adult longevity of the wolf spider, Pardosa astrigera. Results indicated that male mating frequency had little effect on their subsequent copulation success, and of 35 males tested, about half of the males were able to copulate with five virgin females successively at an interval of 24 h. Male mating history had little effect on their courtship duration. However, male mating history significantly affected male copulation duration, female adult longevity, and reproductive output. Males that mated more frequently copulated longer and more likely failed to cause their mates to produce a clutch, although there was no significant difference in the number of eggs laid and the number of eggs hatched regardless of the first clutch or the second one. Multiple mating of male P. astrigera resulted in significant reduction in female adult longevity. Our results indicate that Monandrous females mating with multiple-mated males may incur substantial fitness costs.
Jian Chen - One of the best experts on this subject based on the ideXlab platform.
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experimental evidence for the genetic benefits of female mate choice in the Monandrous wolf spider pardosa astrigera
Animal Behaviour, 2018Co-Authors: Lelei Wen, Jian Chen, Xiaoguo JiaoAbstract:Material and/or genetic benefits are hypothesized to be the main drivers of female mate choice. Research on female mate choice has mainly focused on polyandrous species and has seldom considered Monandrous species. Given the absence of postcopulatory mate choice in Monandrous females, we predicted that precopulatory mate choice is important for Monandrous species. Using the wolf spider Pardosa astrigera as a model Monandrous species, we compared mating, reproductive output and offspring fitness between females with preferred mates (mates that were accepted on the first exposure) and females with nonpreferred mates (mates that were rejected on the first exposure but were induced to mate on the second exposure). Our results showed that the mating duration, latency to egg laying and to egg hatching, fecundity and egg hatching rate did not differ significantly between females with preferred versus nonpreferred mates. In contrast, female and male development time was significantly shorter and female carapace width was significantly greater for offspring of females with preferred versus nonpreferred mates. In addition, survival from egg hatching to maturity was twice as high for offspring of females with preferred mates. These results indicate that female mate choice by the Monandrous P. astrigera provides genetic rather than material benefits.
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silk mediated male courtship effort in the Monandrous wolf spider pardosa astrigera araneae lycosidae
Chemoecology, 2015Co-Authors: Rong Xiao, Yueli Yun, Jian Chen, Bo Chen, Yancong Wang, Xiaoguo JiaoAbstract:In nature, male wolf spiders may encounter silk of conspecific females, males, and/or both. It is generally accepted that males are able to discriminate maturity, sex, and mating status through silk-mediated chemical information of females. However, whether males can discriminate silk by chemical cues among virgin females of different post-maturation ages and between female silk with and without previously being occupied by other males remains largely unexplored. Given that female sexual receptivity increases in post-maturation, males are predicted to prefer old over young virgin females, and are able to discriminate silk of females which have and have not been previously being occupied by other males. In this study, we used the Monandrous wolf spider, Pardosa astrigera, to test this prediction experimentally. When males were exposed to the silk of virgin females of different post-maturation ages (1-, 3-, and 6-day-old females), we found no significant differences in male courtship latency and courtship intensity to female silk across the different ages. However, males displayed significantly higher courtship intensity to the silk of females without being previously occupied by other males than to the silk of females with being previously occupied by other males. When males were directly exposed to virgin females, significantly higher courtship intensity was detected in males in response to 6-day-old females compared with 1-day-old ones. Thus, our results suggest that P. astrigera males can discriminate females using chemical cues from silk that has been previously occupied by other males and to older females with higher sexual receptivity, whereas they invest less to silk cues from virgin females regardless of their post-maturation ages.
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male remating and female fitness in the wolf spider pardosa astrigera the role of male mating history
Behavioral Ecology and Sociobiology, 2011Co-Authors: Xiaoguo Jiao, Fengxiang Liu, Zhanqi Chen, Jian ChenAbstract:Although the effects of male mating history on female reproductive output and longevity have been studied in insects, few such studies have been carried out in spiders. In a mating system in which females are Monandrous while males are polygynous, females may incur the risk by mating with successful males that have experienced consecutive matings and suffer from the possible depletion of sperm and/or associated ejaculates. Here, we examine the effects of male mating history on male courtship and copulation duration, female reproductive fitness, and female adult longevity of the wolf spider, Pardosa astrigera. Results indicated that male mating frequency had little effect on their subsequent copulation success, and of 35 males tested, about half of the males were able to copulate with five virgin females successively at an interval of 24 h. Male mating history had little effect on their courtship duration. However, male mating history significantly affected male copulation duration, female adult longevity, and reproductive output. Males that mated more frequently copulated longer and more likely failed to cause their mates to produce a clutch, although there was no significant difference in the number of eggs laid and the number of eggs hatched regardless of the first clutch or the second one. Multiple mating of male P. astrigera resulted in significant reduction in female adult longevity. Our results indicate that Monandrous females mating with multiple-mated males may incur substantial fitness costs.
Naomi E. Pierce - One of the best experts on this subject based on the ideXlab platform.
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strict monandry in the ponerine army ant genus simopelta suggests that colony size and complexity drive mating system evolution in social insects
Molecular Ecology, 2011Co-Authors: Daniel J C Kronauer, Jacobus J Boomsma, Sean Odonnell, Naomi E. PierceAbstract:Altruism in social insects has evolved between closely related full-siblings. It is therefore of considerable interest why some groups have secondarily evolved low within-colony relatedness, which in turn affects the relatedness incentives of within-colony cooperation and conflict. The highest queen mating frequencies, and therefore among the lowest degrees of colony relatedness, occur in Apis honeybees and army ants of the subfamilies Aenictinae, Ecitoninae, and Dorylinae, suggesting that common life history features such as reproduction by colony fission and male biased numerical sex-ratios have convergently shaped these mating systems. Here we show that ponerine army ants of the genus Simopelta, which are distantly related but similar in general biology to other army ants, have strictly Monandrous queens. Preliminary data suggest that workers reproduce in queenright colonies, which is in sharp contrast to other army ants. We hypothesize that differences in mature colony size and social complexity may explain these striking
Ben D Moore - One of the best experts on this subject based on the ideXlab platform.
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number of mates and timing of mating affect offspring growth in the small marsupial antechinus agilis
Animal Behaviour, 2006Co-Authors: Diana O Fisher, Michael C Double, Ben D MooreAbstract:Many fitness benefits of polyandry have been proposed. We addressed four hypotheses that are relevant to the agile antechinus, Antechinus agilis, a highly promiscuous marsupial: polyandry (1) involves females 'trading up' to obtain good genes for offspring; (2) promotes sperm competition/sperm choice to obtain good genes; (3) enables females to avoid genetically incompatible gene combinations (specifically inbreeding); or (4) enables females to avoid infertility. We tested the predictions of these hypotheses using female choice trials, manipulative mating experiments and microsatellite analysis of paternity. Because timing of mating affects fertility and prenatal abnormality rates in this species, we also tested whether it affects offspring growth rates. We found support for a genetic benefit of polyandry: offspring of polyandrous females grew faster than offspring of Monandrous females, and this effect was more pronounced for females that mated close to ovulation. However, although larger males sire more offspring in the wild in this species, females did not initially choose large mates and did not 'trade up' based on male size. We found no evidence of genetic incompatibility effects. Monandrous females were not less likely to conceive than polyandrous females, although females in the wild are more likely to encounter infertile and subfertile males than in this study. Females that mated closer to ovulation had slower-growing litters. We conclude that female antechinuses benefit through increased offspring growth rates by mating with multiple males, and by mating several days before ovulation. (c) 2005 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
Kristin A Hook - One of the best experts on this subject based on the ideXlab platform.
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no support for the sexy sperm hypothesis in the seed beetle sons of Monandrous females fare better in post copulatory competition
Ecology and Evolution, 2018Co-Authors: Kristin A HookAbstract:The sexy-sperm hypothesis posits that polyandrous females derive an indirect fitness benefit from multi-male mating because they increase the probability their eggs are fertilized by males whose sperm have high fertilizing efficiency, which is assumed to be heritable and conferred on their sons. However, whether this process occurs is contentious because father-to-son heritability may be constrained by the genetic architecture underlying traits important in sperm competition within certain species. Previous empirical work has revealed such genetic constraints in the seed beetle, Callosobruchus maculatus, a model system in sperm competition studies in which female multi-male mating is ubiquitous. Using the seed beetle, I tested a critical prediction of the sexy-sperm hypothesis that polyandrous females produce sons that are on average more successful under sperm competition than sons from Monandrous females. Contrary to the prediction of the sexy-sperm hypothesis, I found that sons from Monandrous females had significantly higher relative paternity in competitive double matings. Moreover, post hoc analyses revealed that these sons produced significantly larger ejaculates when second to mate, despite being smaller. This study is the first to provide empirical evidence for post-copulatory processes favoring Monandrous sons and discusses potential explanations for the unexpected bias in paternity.
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EganEtAl2015-PaternityGenotypeData
2016Co-Authors: Andrea L Egan, Kristin A Hook, Kern H Reeve, Vikram K IyengarAbstract:This Excel file contains the paternity and genotyping data for offspring in the Monandrous vs. polyandrous treatments