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Hou YY, Zang ZY, Lü WJ, Xu W, Desneux N, Zang LS. Transgenerational hormesis and sublethal effects of five key insecticides for controlling Spodoptera frugiperda on its endoparasitoid Cotesia marginiventris. PEST MANAGEMENT SCIENCE 2024; 80:1681-1691. [PMID: 38010617 DOI: 10.1002/ps.7899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 11/09/2023] [Accepted: 11/24/2023] [Indexed: 11/29/2023]
Abstract
BACKGROUND The endoparasitoid Cotesia marginiventris (Cresson) is a promising biological control agent of the fall armyworm (FAW) Spodoptera frugiperda (Smith). Because the application of insecticides is one of the prime choices in pest management, we evaluated the sublethal and transgenerational effects of the five key insecticides-chlorantraniliprole, emamectin benzoate, spinetoram, Bacillus thuringiensis (Bt), and Mamestra brassicae nucleopolyhedrovirus (MbNPV)-on the parasitoid. RESULTS Exposure to five insecticides at a concentration causing 10% mortality (LC10 ) caused hormetic effects in the parent generation (F0 ) by increasing the parasitism and reducing the immature duration. Interestingly, the hormetic response was also observed in the offspring generation indirectly exposed to the insecticides. Furthermore, insecticides increased the parasitism rate by 6.32-14.73% in the F1 generation, which was similar to that of the F0 generation (3.96-11.81%) compared with the control. No significant adverse effect was observed on the number of emerged parasitoids of the F1 and F2 generations. However, insecticides had a detrimental impact on body size and fecundity in the F1 and F2 generations, which showed a small body size with shorter hind tibiae and a significant reduction in the female ratio compared with the control; the exception was that chlorantraniliprole significantly improved the female ratio in the F2 generation. CONCLUSIONS Five insecticides at LC10 induced transgenerational hormetic and sublethal effects on C. marginiventris. Our results provide a scientific basis for a better understanding of the long-term impacts of insecticides at sublethal doses on parasitoids, facilitating the development of improved integrated pest management programs for FAW control. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Yang-Yang Hou
- College of Plant Protection, Jilin Agricultural University, Changchun, China
| | - Zhuo-Yi Zang
- College of Plant Protection, Jilin Agricultural University, Changchun, China
| | - Wen-Jie Lü
- College of Plant Protection, Jilin Agricultural University, Changchun, China
| | - Wei Xu
- College of Plant Protection, Jilin Agricultural University, Changchun, China
| | | | - Lian-Sheng Zang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Guizhou University, Guiyang, China
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Santoni MM, Magri LA, de Oliveira Silva V, da Silva BH, Del Lama MA. Sex Ratio, Sexual Dimorphism, and Wing Geometric Morphometrics in Species of Trypoxylon Latreille, 1796 (Hymenoptera: Crabronidae). NEOTROPICAL ENTOMOLOGY 2023; 52:1005-1017. [PMID: 37768508 DOI: 10.1007/s13744-023-01080-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 08/30/2023] [Indexed: 09/29/2023]
Abstract
Studying the nesting biology of wasp and bee species provides valuable insights into the ecology and evolution of these insects, shedding light on their ecological significance and aiding in their conservation efforts. Trypoxylon Latreille, 1796 is a genus of spider-hunting wasps that provisions their brood with paralyzed preys. This study focuses on aspects of nesting biology of Trypoxylon (Trypargilum) species such as sex ratio, sexual dimorphism, and morphometric variation at both inter- and intraspecific levels. The secondary sex ratio (SR) exhibited variation among species and populations. Males predominantly emerged from the first brood cells and from trap nests with smaller diameters. In comparison, females showed significantly larger body mass and linear wing measurements than males. Procrustes ANOVA values for centroid size (CS) and wing shape (SH) indicated significant differences in both wing size and shape among the five analyzed Trypoxylon species. Sexual dimorphism indices (SDI) derived from centroid size were found to be similar to those obtained from linear measurements, while SDI values based on body mass were significantly higher. Nests containing a greater number of cells tended to produce a larger number of higher-quality males and females. This observation, along with the lower coefficient of variation for female body size and high heritability, suggests that this trait may be subject to natural selection. Further studies that estimate the size of parents and their respective offspring are necessary to confirm the fitness advantage associated with larger female sizes in Trypoxylon species.
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Affiliation(s)
- Mariana Marchi Santoni
- Lab de Genética Evolutiva de Himenópteros, Depto de Genética E Evolução, Univ Federal de São Carlos, São Paulo, São Carlos, Brazil
| | - Lucas Araújo Magri
- Lab de Genética Evolutiva de Himenópteros, Depto de Genética E Evolução, Univ Federal de São Carlos, São Paulo, São Carlos, Brazil
| | - Vinicius de Oliveira Silva
- Lab de Genética Evolutiva de Himenópteros, Depto de Genética E Evolução, Univ Federal de São Carlos, São Paulo, São Carlos, Brazil
| | - Bruno Hofstatter da Silva
- Lab de Genética Evolutiva de Himenópteros, Depto de Genética E Evolução, Univ Federal de São Carlos, São Paulo, São Carlos, Brazil
| | - Marco Antonio Del Lama
- Lab de Genética Evolutiva de Himenópteros, Depto de Genética E Evolução, Univ Federal de São Carlos, São Paulo, São Carlos, Brazil.
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Fei M, Gols R, Harvey JA. The Biology and Ecology of Parasitoid Wasps of Predatory Arthropods. ANNUAL REVIEW OF ENTOMOLOGY 2023; 68:109-128. [PMID: 36198401 DOI: 10.1146/annurev-ento-120120-111607] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Parasitoid wasps are important components of insect food chains and have played a central role in biological control programs for over a century. Although the vast majority of parasitoids exploit insect herbivores as hosts, others parasitize predatory insects and arthropods, such as ladybird beetles, hoverflies, lacewings, ground beetles, and spiders, or are hyperparasitoids. Much of the research on the biology and ecology of parasitoids of predators has focused on ladybird beetles, whose parasitoids may interfere with the control of insect pests like aphids by reducing ladybird abundance. Alternatively, parasitoids of the invasive ladybird Harmonia axyridis may reduce its harmful impact on native ladybird populations. Different life stages of predatory insects and spiders are susceptible to parasitism to different degrees. Many parasitoids of predators exhibit intricate physiological interrelationships with their hosts, adaptively manipulating host behavior, biology, and ecology in ways that increase parasitoid survival and fitness.
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Affiliation(s)
- Minghui Fei
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing, People's Republic of China;
| | - Rieta Gols
- Laboratory of Entomology, Wageningen University, Wageningen, The Netherlands;
| | - Jeffrey A Harvey
- Department of Terrestrial Ecology, Netherlands Institute of Ecology, Wageningen, The Netherlands;
- Animal Ecology Section, Department of Ecological Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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Weerawansha N, Wang Q, He XZ. A haplodiploid mite adjusts fecundity and sex ratio in response to density changes during the reproductive period. EXPERIMENTAL & APPLIED ACAROLOGY 2022; 88:277-288. [PMID: 36242724 PMCID: PMC9732065 DOI: 10.1007/s10493-022-00749-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
Population density is one of the main socio-environmental factors that have critical impacts on reproduction of animals. Consequently, they need to adjust their reproductive strategies in response to changes of local population density. In this study we used a haplodiploid spider mite, Tetranychus ludeni Zacher (Acari: Tetranychidae), to test how population density dynamics during the reproductive period altered female reproductive performance. We demonstrate that females produced fewer eggs with a significantly higher female-biased sex ratio in dense populations. Reducing fecundity and increasing daughter production in a dense environment could be an advantageous strategy to minimise the intensity of local food competition. However, females also reduced their fecundity after arrival in a new site of larger area from a dense population, which may be associated with higher web production costs because females need to produce more webs to cover the larger area. There was no trade-off between egg number and size, and egg size had little impact on reproductive fitness. Therefore, T. ludeni females could adapt to the shift of population density during their reproductive period by manipulating the fecundity and offspring sex ratio but not the egg size.
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Affiliation(s)
- Nuwan Weerawansha
- School of Agriculture and Environment, Massey University, Private Bag 11222, Palmerston North, New Zealand
- Faculty of Animal Science and Export Agriculture, Uva Wellassa University of Sri Lanka, Passara Road, Badulla, 90000, Sri Lanka
| | - Qiao Wang
- School of Agriculture and Environment, Massey University, Private Bag 11222, Palmerston North, New Zealand
| | - Xiong Zhao He
- School of Agriculture and Environment, Massey University, Private Bag 11222, Palmerston North, New Zealand.
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Abstract
Hyperparasitoids are some of the most diverse members of insect food webs. True hyperparasitoids parasitize the larvae of other parasitoids, reaching these larvae with their ovipositor through the herbivore that hosts the parasitoid larva. During pupation, primary parasitoids also may be attacked by pseudohyperparasitoids that lay their eggs on the parasitoid (pre)pupae. By attacking primary parasitoids, hyperparasitoids may affect herbivore population dynamics, and they have been identified as a major challenge in biological control. Over the past decades, research, especially on aphid- and caterpillar-associated hyperparasitoids, has revealed that hyperparasitoids challenge rules on nutrient use efficiency in trophic chains, account for herbivore outbreaks, or stabilize competitive interactions in lower trophic levels, and they may use cues derived from complex interaction networks to locate their hosts. This review focuses on the fascinating ecology of hyperparasitoids related to how they exploit and locate their often inconspicuous hosts and the insect community processes in which hyperparasitoids are prominent players.
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Affiliation(s)
- Erik H Poelman
- Laboratory of Entomology, Wageningen University and Research, 6700 AA Wageningen, The Netherlands;
| | - Antonino Cusumano
- Department of Agricultural, Food and Forest Sciences, University of Palermo, 90128 Palermo, Italy;
| | - Jetske G de Boer
- Terrestrial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), 6708 PB Wageningen, The Netherlands;
- Aeres University of Applied Sciences, 6708 PB Wageningen, The Netherlands
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Harvey JA, Visser B, Lammers M, Marien J, Gershenzon J, Ode PJ, Heinen R, Gols R, Ellers J. Ant-like Traits in Wingless Parasitoids Repel Attack from Wolf Spiders. J Chem Ecol 2018; 44:894-904. [PMID: 30066038 PMCID: PMC6153775 DOI: 10.1007/s10886-018-0989-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 07/04/2018] [Accepted: 07/06/2018] [Indexed: 11/24/2022]
Abstract
A recent study showed that a wingless parasitoid, Gelis agilis, exhibits a suite of ant-like traits that repels attack from wolf spiders. When agitated, G. agilis secreted 6-methyl-5-hepten-2-one (sulcatone), which a small number of ant species produce as an alarm/panic pheromone. Here, we tested four Gelis parasitoid species, occurring in the same food chain and microhabitats, for the presence of sulcatone and conducted two-species choice bioassays with wolf spiders to determine their degree of susceptibility to attack. All four Gelis species, including both winged and wingless species, produced sulcatone, whereas a closely related species, Acrolyta nens, and the more distantly related Cotesia glomerata, did not. In two-choice bioassays, spiders overwhelmingly rejected the wingless Gelis species, preferring A. nens and C. glomerata. However, spiders exhibited no preference for either A. nens or G. areator, both of which are winged. Wingless gelines exhibited several ant-like traits, perhaps accounting for the reluctance of spiders to attack them. On the other hand, despite producing sulcatone, the winged G. areator more closely resembles other winged cryptines like A. nens, making it harder for spiders to distinguish between these two species. C. glomerata was also preferred by spiders over A. nens, suggesting that other non-sulcatone producing cryptines nevertheless possess traits that make them less attractive as prey. Phylogenetic reconstruction of the Cryptinae reveals that G. hortensis and G. proximus are ‘sister’species, with G. agilis, and G.areator in particular evolving along more distant trajectories. We discuss the possibility that wingless Gelis species have evolved a suite of ant-like traits as a form, of mimicry to repel predators on the ground.
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Affiliation(s)
- Jeffrey A Harvey
- Department of Terrestrial Ecology, Netherlands Institute of Ecology, Droevendaalsesteeg 10, 6700, AB, Wageningen, The Netherlands. .,Department of Ecological Sciences, Section Animal Ecology, VU University Amsterdam, De Boelelaan 1085, 1081, HV, Amsterdam, The Netherlands.
| | - Bertanne Visser
- Evolutionary Ecology and Genetics group, Biodiversity Research Centre, Earth and Life Institute, Université Catholique de Louvain, Croix du Sud 4-5, 1348, Louvain-la-Neuve, Belgium
| | - Marl Lammers
- Department of Ecological Sciences, Section Animal Ecology, VU University Amsterdam, De Boelelaan 1085, 1081, HV, Amsterdam, The Netherlands
| | - Janine Marien
- Department of Ecological Sciences, Section Animal Ecology, VU University Amsterdam, De Boelelaan 1085, 1081, HV, Amsterdam, The Netherlands
| | - Jonathan Gershenzon
- Max Planck Institute of Chemical Ecology, Beutenberg Campus, Hans Knoel Str 8, DE-07745, Jena, Germany
| | - Paul J Ode
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, 80523-1177, USA
| | - Robin Heinen
- Department of Terrestrial Ecology, Netherlands Institute of Ecology, Droevendaalsesteeg 10, 6700, AB, Wageningen, The Netherlands
| | - Rieta Gols
- Laboratory of Entomology, Wageningen University, Droevendaalsesteeg 1, 6700, EH, Wageningen, the Netherlands
| | - Jacintha Ellers
- Department of Ecological Sciences, Section Animal Ecology, VU University Amsterdam, De Boelelaan 1085, 1081, HV, Amsterdam, The Netherlands
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Harvey JA, Essens TA, Las RA, van Veen C, Visser B, Ellers J, Heinen R, Gols R. Honey and honey-based sugars partially affect reproductive trade-offs in parasitoids exhibiting different life-history and reproductive strategies. JOURNAL OF INSECT PHYSIOLOGY 2017; 98:134-140. [PMID: 28017729 DOI: 10.1016/j.jinsphys.2016.12.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 12/12/2016] [Accepted: 12/18/2016] [Indexed: 06/06/2023]
Abstract
Adult dietary regimes in insects may affect egg production, fecundity and ultimately fitness. This is especially relevant in parasitoid wasps where many species serve as important biological control agents of agricultural pests. Here, we tested the effect of honey and sugar diets on daily fecundity schedules, lifetime reproductive success and longevity in four species of parasitoid wasps when reared on their respective hosts. The parasitoid species were selected based on dichotomies in host usage strategies and reproductive traits. Gelis agilis and G. areator are idiobiont ecto-parasitoids that develop in non-growing hosts, feed on protein-rich host fluids to maximize reproduction as adults and produce small numbers of large eggs. Meteorus pulchricornis and Microplitis mediator are koinobiont endoparasitoids that develop inside the bodies of growing hosts, do not host-feed, and produce greater numbers of small eggs. Parasitoids were reared on diets of either pure honey (containing trace amounts of proteins), heated honey (with denatured proteins) and a honey-mimic containing sugars only. We hypothesized that the benefits of proteins in honey would enhance reproduction in the ectoparasitoids due to their high metabolic investment per egg, but not in the koinobionts. Pure honey diet resulted in higher lifetime fecundity in G. agilis compared with the honey-mimic, whereas in both koinobionts, reproductive success did not vary significantly with diet. Longevity was less affected by diet in all of the parasitoids, although there were variable trade-offs between host access and longevity in the four species. We argue that there are both trait-based and association-specific effects of supplementary nutrients in honey on reproductive investment and success in parasitoid wasps.
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Affiliation(s)
- Jeffrey A Harvey
- Department of Terrestrial Ecology, Netherlands Institute of Ecology, Droevendalsesteeg 10, 6708 PB Wageningen, The Netherlands; VU University Amsterdam, Department of Ecological Sciences, Section Animal Ecology, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands.
| | - Tijl A Essens
- Department of Terrestrial Ecology, Netherlands Institute of Ecology, Droevendalsesteeg 10, 6708 PB Wageningen, The Netherlands
| | - Rutger A Las
- Laboratory of Entomology, Wageningen University, Droevendaasesteeg 1, 6700 EH Wageningen, The Netherlands
| | - Cindy van Veen
- Laboratory of Entomology, Wageningen University, Droevendaasesteeg 1, 6700 EH Wageningen, The Netherlands
| | - Bertanne Visser
- Evolutionary Ecology and Genetics Group, Biodiversity Research Centre, Earth and Life Institute Université Catholique de Louvain, Croix du Sud 4, 1348 Louvain-la-Neuve, Belgium
| | - Jacintha Ellers
- VU University Amsterdam, Department of Ecological Sciences, Section Animal Ecology, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
| | - Robin Heinen
- Department of Terrestrial Ecology, Netherlands Institute of Ecology, Droevendalsesteeg 10, 6708 PB Wageningen, The Netherlands
| | - Rieta Gols
- Laboratory of Entomology, Wageningen University, Droevendaasesteeg 1, 6700 EH Wageningen, The Netherlands
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Adam N, Erler T, Kallenbach M, Kaltenpoth M, Kunert G, Baldwin IT, Schuman MC. Sex ratio of mirid populations shifts in response to hostplant co-infestation or altered cytokinin signaling . JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2017; 59:44-59. [PMID: 27862998 PMCID: PMC5234700 DOI: 10.1111/jipb.12507] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Accepted: 11/08/2016] [Indexed: 05/11/2023]
Abstract
Herbivore species sharing a host plant often compete. In this study, we show that host plant-mediated interaction between two insect herbivores - a generalist and a specialist - results in a sex ratio shift of the specialist's offspring. We studied demographic parameters of the specialist Tupiocoris notatus (Hemiptera: Miridae) when co-infesting the host plant Nicotiana attenuata (Solanaceae) with the generalist leafhopper Empoasca sp. (Hemiptera: Cicadellidae). We show that the usually female-biased sex ratio of T. notatus shifts toward a higher male proportion in the offspring on plants co-infested by Empoasca sp. This sex ratio change did not occur after oviposition, nor is it due differential mortality of female and male nymphs. Based on pyrosequencing and PCR of bacterial 16S rRNA amplicons, we concluded that sex ratio shifts were unlikely to be due to infection with Wolbachia or other known sex ratio-distorting endosymbionts. Finally, we used transgenic lines of N. attenuata to evaluate if the sex ratio shift could be mediated by changes in general or specialized host plant metabolites. We found that the sex ratio shift occurred on plants deficient in two cytokinin receptors (irCHK2/3). Thus, cytokinin-regulated traits can alter the offspring sex ratio of the specialist T. notatus.
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Affiliation(s)
- Nora Adam
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, 07745 Jena, Germany
- German Centre for Integrative Biodiversity Research (iDiv), Deutscher Platz 5e, 04103 Leipzig, Germany
| | - Theresa Erler
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, 07745 Jena, Germany
| | - Mario Kallenbach
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, 07745 Jena, Germany
| | - Martin Kaltenpoth
- Max Planck Research Group Insect Symbiosis, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, 07745 Jena, Germany
| | - Grit Kunert
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, 07745 Jena, Germany
| | - Ian T. Baldwin
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, 07745 Jena, Germany
| | - Meredith C. Schuman
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, 07745 Jena, Germany
- German Centre for Integrative Biodiversity Research (iDiv), Deutscher Platz 5e, 04103 Leipzig, Germany
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Tang X, Meng L, Kapranas A, Xu F, Hardy ICW, Li B. Mutually beneficial host exploitation and ultra-biased sex ratios in quasisocial parasitoids. Nat Commun 2014; 5:4942. [PMID: 25216091 PMCID: PMC4175580 DOI: 10.1038/ncomms5942] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Accepted: 08/08/2014] [Indexed: 11/09/2022] Open
Abstract
Selfish interests usually preclude resource sharing, but under some conditions collective actions enhance per capita gains. Such Allee effects underlay early explanations of social evolution but current understanding focusses on kin selection (inclusive fitness). We find an Allee effect that explains unusual quasisociality (cooperative brood care) among parasitoid wasps without invoking or precluding kin selection effects. In Sclerodermus harmandi, individual females produce most offspring when exploiting small hosts alone. However, larger hosts are more successfully exploited by larger groups of females, with the per-female benefits outweighing the costs of host sharing. Further, the extremely biased sex ratios (97% female) are better explained by mutually beneficial female-female interactions that increase the reproductive value of daughters (local resource enhancement), rather than by the usually invoked local mate competition between males. Thus, atypical quasisocial behaviour in a parasitoid wasp directly enhances reproductive success and selects for very extremely female-biased sex ratios.
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Affiliation(s)
- Xiuyun Tang
- School of Plant Protection, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu 210095, China
| | - Ling Meng
- School of Plant Protection, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu 210095, China
| | - Apostolos Kapranas
- 1] School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK [2] Department of Biology, National University of Ireland Maynooth, County Kildare, Ireland
| | - Fuyuan Xu
- Forest Academy of Jiangsu Province, Dongshanqiao, Nanjing, Jiangsu 211153, China
| | - Ian C W Hardy
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
| | - Baoping Li
- School of Plant Protection, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu 210095, China
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