1
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Zhang D, Maiga H, Li Y, Bakhoum MT, Wang G, Sun Y, Damiens D, Mamai W, Bimbilé Somda NS, Wallner T, Bueno-Masso O, Martina C, Kotla SS, Yamada H, Lu D, Tan CH, Guo J, Feng Q, Zhang J, Zhao X, Paerhande D, Pan W, Wu Y, Zheng X, Wu Z, Xi Z, Vreysen MJB, Bouyer J. Mating harassment may boost the effectiveness of the sterile insect technique for Aedes mosquitoes. Nat Commun 2024; 15:1980. [PMID: 38438367 PMCID: PMC10912119 DOI: 10.1038/s41467-024-46268-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 02/20/2024] [Indexed: 03/06/2024] Open
Abstract
The sterile insect technique is based on the overflooding of a target population with released sterile males inducing sterility in the wild female population. It has proven to be effective against several insect pest species of agricultural and veterinary importance and is under development for Aedes mosquitoes. Here, we show that the release of sterile males at high sterile male to wild female ratios may also impact the target female population through mating harassment. Under laboratory conditions, male to female ratios above 50 to 1 reduce the longevity of female Aedes mosquitoes by reducing their feeding success. Under controlled conditions, blood uptake of females from an artificial host or from a mouse and biting rates on humans are also reduced. Finally, in a field trial conducted in a 1.17 ha area in China, the female biting rate is reduced by 80%, concurrent to a reduction of female mosquito density of 40% due to the swarming of males around humans attempting to mate with the female mosquitoes. This suggests that the sterile insect technique does not only suppress mosquito vector populations through the induction of sterility, but may also reduce disease transmission due to increased female mortality and lower host contact.
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Affiliation(s)
- Dongjing Zhang
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Hamidou Maiga
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, IAEA, Vienna, Austria
- Institut de Recherche en Sciences de la Santé, Direction Régionale de l'Ouest (IRSS-DRO), Bobo-Dioulasso, Burkina Faso
| | - Yongjun Li
- Department of Pathogen Biology, School of Medicine, Jinan University, Guangzhou, China
- Guangzhou Wolbaki Biotech Co., Ltd, Guangzhou, China
| | - Mame Thierno Bakhoum
- Institut de Recherche en Sciences de la Santé, Direction Régionale de l'Ouest (IRSS-DRO), Bobo-Dioulasso, Burkina Faso
- Institut Sénégalais de Recherches Agricoles, Laboratoire National de l'Elevage et de Recherches Vétérinaires, BP 2057, Dakar, Sénégal
| | - Gang Wang
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Yan Sun
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - David Damiens
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/Université de Montpellier), IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), Sainte Clotilde, Reunion Island, France
| | - Wadaka Mamai
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, IAEA, Vienna, Austria
| | - Nanwintoum Séverin Bimbilé Somda
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, IAEA, Vienna, Austria
- Unité de Formation et de Recherche en Science et Technologie (UFR/ST), UniversitéNorbert ZONGO (UNZ), BP 376, Koudougou, Burkina Faso
| | - Thomas Wallner
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, IAEA, Vienna, Austria
| | - Odet Bueno-Masso
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, IAEA, Vienna, Austria
| | - Claudia Martina
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, IAEA, Vienna, Austria
| | - Simran Singh Kotla
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, IAEA, Vienna, Austria
| | - Hanano Yamada
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, IAEA, Vienna, Austria
| | - Deng Lu
- National Environment Agency, Singapore, Singapore
| | | | - Jiatian Guo
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Qingdeng Feng
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Junyan Zhang
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Xufei Zhao
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Dilinuer Paerhande
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Wenjie Pan
- SYSU Nuclear and Insect Biotechnology Co., Ltd, Dongguan, China
| | - Yu Wu
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Xiaoying Zheng
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Zhongdao Wu
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Zhiyong Xi
- Guangzhou Wolbaki Biotech Co., Ltd, Guangzhou, China
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, USA
| | - Marc J B Vreysen
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, IAEA, Vienna, Austria
| | - Jérémy Bouyer
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, IAEA, Vienna, Austria.
- ASTRE, CIRAD, F-34398, Montpellier, France.
- ASTRE, Cirad, INRAE, Univ. Montpellier, Plateforme Technologique CYROI, Sainte-Clotilde, La Réunion, France.
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2
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Adeola F, Lailvaux S. Bite force, body size, and octopamine mediate mating interactions in the house cricket (Acheta domesticus). J Evol Biol 2023; 36:1494-1502. [PMID: 37737492 DOI: 10.1111/jeb.14226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 07/30/2023] [Accepted: 08/30/2023] [Indexed: 09/23/2023]
Abstract
Mating interactions are rife with conflict because the evolutionary interests of males and females seldom coincide. Intersexual conflict affects sexual selection, yet the proximate factors underlying male coercive ability and female resistance are poorly understood. Male combat outcomes are often influenced by bite force, with superior biters being more likely to achieve victory over poorer biters in a range of species, including crickets. If good performers also achieve mating success through sexual coercion, then bite force might play a role in intersexual conflict as well. We tested the capacity of bite force to influence mating interactions in house crickets both directly by measuring bite forces of males and females and by altering male bite capacity through neuropharmacological manipulation. In addition, the invertebrate neurotransmitter octopamine both mediates aggression and underlies motivation to bite in male house crickets. By blocking octopamine receptors through the application of an antagonist, epinastine, we tested the effects of reduced bite force on male mating success. Our results show that male bite capacity, in combination with body size, influences both the likelihood and the outcomes of mating interactions, whereas treatment of males with epinastine eliminates motivation to mate. Our results suggest a functional role for bite force in affecting both sexual conflict and sexual selection and expand our knowledge of the influence of biogenic amines on reproductive behaviour.
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Affiliation(s)
- Fadeke Adeola
- Department of Biological Sciences, University of New Orleans, New Orleans, Louisiana, USA
| | - Simon Lailvaux
- Department of Biological Sciences, University of New Orleans, New Orleans, Louisiana, USA
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3
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Šigutová H, Šigut M, Dolný A, Harabiš F. Individual variability in habitat selection by aquatic insects is driven by taxonomy rather than specialisation. Sci Rep 2022; 12:20735. [PMID: 36456650 PMCID: PMC9715563 DOI: 10.1038/s41598-022-25363-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 11/29/2022] [Indexed: 12/05/2022] Open
Abstract
Habitat selection, the choice of a habitat based on its perceived quality, is a key mechanism structuring freshwater communities. To date, individual variability in habitat selection has been neglected, and specialisation has never been considered in this type of studies. We examined the individual differences in the habitat selection of backswimmers (Notonectidae) and diving beetles (Dytiscidae). From each family, we selected one habitat generalist able to coexist with fish (Notonecta glauca, Dytiscus marginalis), and one species specialised to fishless habitats (Notonecta obliqua, Acilius sulcatus). We performed a mesocosm experiment quantifying the consistency in individuals' decisions in response to fish and vegetation structure, in relation to sex and specialisation. Neither the overall pattern of preferences nor consistency in individuals' decisions differed between specialists and generalists or between the sexes, but both were consistent within families. At the population level, backswimmers preferred fishless pools with submersed and floating macrophytes, while diving beetles showed no clear preferences. Individual decisions of backswimmers were consistent and likely driven by conspecific/heterospecific attraction. In diving beetles, individual decisions were primarily density-dependent. Our results reinforce the significance of habitat selectivity for aquatic community assembly, while suggesting a range of mechanisms driving variability in individual behaviour.
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Affiliation(s)
- Hana Šigutová
- grid.412684.d0000 0001 2155 4545Department of Biology and Ecology, Faculty of Science, University of Ostrava, Ostrava, Czech Republic ,grid.10979.360000 0001 1245 3953Department of Zoology, Faculty of Science, Palacký University, Olomouc, Czech Republic
| | - Martin Šigut
- grid.412684.d0000 0001 2155 4545Department of Biology and Ecology, Faculty of Science, University of Ostrava, Ostrava, Czech Republic
| | - Aleš Dolný
- grid.412684.d0000 0001 2155 4545Department of Biology and Ecology, Faculty of Science, University of Ostrava, Ostrava, Czech Republic
| | - Filip Harabiš
- grid.15866.3c0000 0001 2238 631XDepartment of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences, Prague, Czech Republic
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4
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Yoshida K, Setogawa T, Sato T, Yamada M, Sato T, Narita K, Matsumoto A, Tomiyama T. Male-biased sex ratio in the crawling individuals of an invasive naticid snail during summer: implications for population management. Sci Rep 2022; 12:7911. [PMID: 35550591 PMCID: PMC9098859 DOI: 10.1038/s41598-022-12144-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 05/06/2022] [Indexed: 11/09/2022] Open
Abstract
The naticid snail Laguncula pulchella is an invasive species that preys on clams in tidal flats and has serious impacts on clam fisheries in Japan. Laguncula pulchella burrow in sand, but often crawl on sediment surfaces during low tide. We investigated seasonal changes in the abundance and sex ratio of crawling L. pulchella during the daytime at Matsukawaura Lagoon, Japan, from March to October from 2015 to 2019. The density of crawling individuals peaked in July. The sex ratio of crawling individuals varied with months and years but was significantly biased towards males during the main copulation period (July–August); males accounted for 77–98% of the mature crawling individuals (≥ 25 mm shell height). The somatic condition of mature males declined from June to August, whereas that of females was constant during this period. These results indicate that mature males actively come to the sand surface during low tide to search for females for copulation from July to August. Fishermen make efforts to remove crawling individuals in summer, but the male-biased sex ratio must also be considered for effective population control of this species.
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Affiliation(s)
- Kazuki Yoshida
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, 739-8528, Japan
| | - Tomoka Setogawa
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, 739-8528, Japan
| | - Toshiyuki Sato
- Fukushima Prefectural Research Institute of Fisheries Resources, Soma, Fukushima, 976-0005, Japan
| | - Manabu Yamada
- Fukushima Prefectural Research Institute of Fisheries Resources, Soma, Fukushima, 976-0005, Japan
| | - Tatsuma Sato
- Fukushima Prefectural Research Institute of Fisheries Resources, Soma, Fukushima, 976-0005, Japan
| | - Kaoru Narita
- Fukushima Prefectural Research Institute of Fisheries Resources, Soma, Fukushima, 976-0005, Japan
| | - Akira Matsumoto
- Fukushima Prefectural Research Institute of Fisheries Resources, Soma, Fukushima, 976-0005, Japan
| | - Takeshi Tomiyama
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, 739-8528, Japan.
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5
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Garlovsky MD, Holman L, Brooks AL, Novicic ZK, Snook RR. Experimental sexual selection affects the evolution of physiological and life-history traits. J Evol Biol 2022; 35:742-751. [PMID: 35384100 PMCID: PMC9322299 DOI: 10.1111/jeb.14003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 03/04/2022] [Accepted: 03/09/2022] [Indexed: 12/16/2022]
Abstract
Sexual selection and sexual conflict are expected to affect all aspects of the phenotype, not only traits that are directly involved in reproduction. Here, we show coordinated evolution of multiple physiological and life-history traits in response to long-term experimental manipulation of the mating system in populations of Drosophila pseudoobscura. Development time was extended under polyandry relative to monogamy in both sexes, potentially due to higher investment in traits linked to sexual selection and sexual conflict. Individuals (especially males) evolving under polyandry had higher metabolic rates and locomotor activity than those evolving under monogamy. Polyandry individuals also invested more in metabolites associated with increased endurance capacity and efficient energy metabolism and regulation, namely lipids and glycogen. Finally, polyandry males were less desiccation- and starvation resistant than monogamy males, suggesting trade-offs between resistance and sexually selected traits. Our results provide experimental evidence that mating systems can impose selection that influences the evolution of non-sexual phenotypes such as development, activity, metabolism and nutrient homeostasis.
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Affiliation(s)
- Martin D Garlovsky
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK
| | - Luke Holman
- School of Applied Sciences, Edinburgh Napier University, Edinburgh, UK
| | - Andrew L Brooks
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK
| | - Zorana K Novicic
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Center, Uppsala University, Uppsala, Sweden
| | - Rhonda R Snook
- Department of Zoology, Stockholm University, Stockholm, Sweden
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6
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Wootton HF, Morrongiello JR, Schmitt T, Audzijonyte A. Smaller adult fish size in warmer water is not explained by elevated metabolism. Ecol Lett 2022; 25:1177-1188. [PMID: 35266600 PMCID: PMC9545254 DOI: 10.1111/ele.13989] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/24/2022] [Accepted: 02/07/2022] [Indexed: 12/24/2022]
Abstract
Fish and other ectotherms living in warmer waters often grow faster as juveniles, mature earlier, but become smaller adults. Known as the temperature‐size rule (TSR), this pattern is commonly attributed to higher metabolism in warmer waters, leaving fewer resources for growth. An alternative explanation focuses on growth and reproduction trade‐offs across temperatures. We tested these hypotheses by measuring growth, maturation, metabolism and reproductive allocation from zebrafish populations kept at 26 and 30°C across six generations. Zebrafish growth and maturation followed TSR expectations but were not explained by baseline metabolic rate, which converged between temperature treatments after a few generations. Rather, we found that females at 30°C allocated more to reproduction, especially when maturing at the smallest sizes. We show that elevated temperatures do not necessarily increase baseline metabolism if sufficient acclimation is allowed and call for an urgent revision of modelling assumptions used to predict population and ecosystem responses to warming.
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Affiliation(s)
- Henry F Wootton
- School of BioSciences, The University of Melbourne, Melbourne, Victoria, Australia
| | - John R Morrongiello
- School of BioSciences, The University of Melbourne, Melbourne, Victoria, Australia
| | - Thomas Schmitt
- School of BioSciences, The University of Melbourne, Melbourne, Victoria, Australia
| | - Asta Audzijonyte
- IMAS, University of Tasmania, Hobart, Tasmania, Australia.,Centre for Marine Socioecology, Hobart, Tasmania, Australia
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7
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8
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Zhang Z, Head ML. Does developmental environment affect sexual conflict? An experimental test in the seed beetle. Behav Ecol 2021. [DOI: 10.1093/beheco/arab119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Sexual conflict and sexually antagonistic coevolution are driven by differences in reproductive interests between the sexes. There have been numerous studies focused on how both the social and physical environment that individuals experience as adults, or where mating occurs, mediate the intensity of sexual conflict. However, how the physical environment that juveniles experience, mediates their later mating interactions, is still poorly understood. In seed beetles, Callosobruchus maculatus, water is an important resource that can impact fitness and reproduction. Here, we manipulated the water content of beans that beetles were reared in and explored how this environmental variation affects mating interactions and subsequent male and female fitness. We measured the mass of ejaculate transferred, mating behavior, female fecundity, and offspring production as well as male and female lifespan. We found that males reared in wet environments transferred a larger ejaculate to females, but only when females were reared in dry environments. We also found that females mated to males reared in dry environments laid more eggs than those mated to males from wet environments. Additionally, eggs laid by females reared in dry conditions had greater survival when they had mated to males reared in dry than wet environments. Overall, however, there were no treatment effects on the number of adult offspring females produced nor male or female adult lifespan, thus it is difficult to determine the evolutionary implications of these results. Our research provides evidence for the importance of developmental environment for determining the expression of adult mating and fitness traits.
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Affiliation(s)
- Zhuzhi Zhang
- Division of Ecology and Evolution, Research School of Biology, Australian National University, Canberra, ACT, 2601, Australia
| | - Megan L Head
- Division of Ecology and Evolution, Research School of Biology, Australian National University, Canberra, ACT, 2601, Australia
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9
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Cargnelutti F, Calbacho‐Rosa L, Peretti AV. Genital movements are not restricted to spermatozoa transfer in a haplogyne spider. Ethology 2021. [DOI: 10.1111/eth.13210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Franco Cargnelutti
- Departamento de Diversidad Biológica y Ecología Facultad de Ciencias Exactas, Físicas y Naturales Universidad Nacional de Córdoba Córdoba Argentina
- Laboratorio de Biología Reproductiva y Evolución Consejo Nacional de Investigaciones Científicas Técnicas (CONICET) Instituto de Diversidad y Ecología Animal (IDEA) Córdoba Argentina
| | - Lucia Calbacho‐Rosa
- Departamento de Diversidad Biológica y Ecología Facultad de Ciencias Exactas, Físicas y Naturales Universidad Nacional de Córdoba Córdoba Argentina
- Laboratorio de Biología Reproductiva y Evolución Consejo Nacional de Investigaciones Científicas Técnicas (CONICET) Instituto de Diversidad y Ecología Animal (IDEA) Córdoba Argentina
| | - Alfredo Vicente Peretti
- Departamento de Diversidad Biológica y Ecología Facultad de Ciencias Exactas, Físicas y Naturales Universidad Nacional de Córdoba Córdoba Argentina
- Laboratorio de Biología Reproductiva y Evolución Consejo Nacional de Investigaciones Científicas Técnicas (CONICET) Instituto de Diversidad y Ecología Animal (IDEA) Córdoba Argentina
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10
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Effects of mating on reproductive performance of Coccophagus japonicus Compere (Hymenoptera: Aphelinidae). Sci Rep 2021; 11:5941. [PMID: 33723348 PMCID: PMC7971017 DOI: 10.1038/s41598-021-85351-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 02/24/2021] [Indexed: 12/03/2022] Open
Abstract
Coccophagus japonicus Compere, an endoparasitoid of Parasaissetia nigra Nietner, has great potential for biological control. To assess the influence of mating on the reproductive performance of this parasitoid, we examined the effects of mating on ovarian development, female longevity and number of eggs laid. The results showed that the egg volume in the ovary of C. japonicus first increased and then decreased with increases in the age of female adults. The peak egg volume in the ovary of mated females occurred 2 days earlier than that of virgin females. Within the female age range of 0–15 days, the numbers of eggs at stages I, II, and III first increased and then decreased with increases in the age of female C. japonicus, whereas the number of eggs at stage IV increased. The duration of the coexistence of females and males significantly influenced the length and width of the female ovaries, and the longest ovary tube and the highest number of eggs were obtained with a coexistence duration of 0 days. C. japonicus female longevity decreased with increases in the number of matings, and the number of eggs laid by females within 15 days decreased with increasing delays in mating. In conclusion, mating can shorten the longevity of C. japonicus females, and selecting newly emerged virgin females for mating can significantly improve the number of eggs laid and the breeding efficiency of the parasitoid.
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11
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Shandilya A, Singh P, Mishra G, Omkar O. Cost of mating in male
Menochilus sexmaculatus
(Fabricius) (Coleoptera: Coccinellidae). Ethology 2020. [DOI: 10.1111/eth.13099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Apoorva Shandilya
- Ladybird Research Laboratory Department of Zoology University of Lucknow Lucknow India
| | - Priya Singh
- Ladybird Research Laboratory Department of Zoology University of Lucknow Lucknow India
| | - Geetanjali Mishra
- Ladybird Research Laboratory Department of Zoology University of Lucknow Lucknow India
| | - Omkar Omkar
- Ladybird Research Laboratory Department of Zoology University of Lucknow Lucknow India
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12
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13
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Abstract
Abstract
Females mate multiply despite numerous costs. It is well established that polyandry can result in sexual conflict, favoring male adaptations that prevent sperm competition often to the disadvantage of the female. Such adaptations are extreme in spiders with one-shot genitalia of which parts break off and act as mating plugs, rendering them dysfunctional. In the spider Argiope bruennichi, mating plugs effectively prevent further males from inseminating and males that inseminate and plug both genital openings of a female secure exclusive paternity. However, females frequently prevent monopolization by attacking and cannibalizing males during their first copulation, leaving their second spermatheca free for another male. Here, we test whether the high frequency of sexual cannibalism evolved as a female adaptation to resist monopolization and secure indirect benefits of polyandry. To standardize conditions, we double-mated females either with the same or two different males and prevented male consumption. Using a split-brood design, we raised offspring to maturity under poor and rich food conditions and measured their survival, duration of juvenile phase, and adult body mass. Under low food, daughters of polyandrous mothers matured later but slightly heavier than daughters of monandrous females. Since the adaptive value of this combination is unclear, these findings lend no conclusive support to our hypothesis. We discuss the stereotypic nature of the female attack in the context of antagonistic co-evolution considering previous studies that found modest direct benefits of cannibalism as well as a potential for non-additive benefits.
Significance statement
Sexual conflict is extreme in spiders where sexual cannibalism impairs male mating rates. Males of the spider Argiope bruennichi possess one-shot genitalia which they break off to plug female genital openings. They gain exclusive paternity with a female if two copulations are achieved and both genital openings plugged. Females, however, stereotypically attack every male at the onset of copulation, limiting most males to single copulation but retaining the option to secure potential benefits of polyandry. Previous studies revealed weak direct and non-additive indirect benefits of multiple mating. In this study, we tested for the presence of additive genetic benefits but again found only inconclusive evidence for adaptive differences in offspring quality between monandrous and polyandrous females. All results combined, we here speculate that the stereotypic female attack might be a ghost of a past antagonistic co-evolution.
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14
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Sears MJ, Barbosa F, Hamel JA. Prolonged and variable copulation durations in a promiscuous insect species: No evidence of reproductive benefits for females. Behav Processes 2020; 179:104189. [PMID: 32623012 DOI: 10.1016/j.beproc.2020.104189] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 06/23/2020] [Accepted: 06/30/2020] [Indexed: 11/30/2022]
Abstract
Within promiscuous mating systems, copulation often functions as more than a means of fertilization, and copulation durations can vary widely. Copulating for prolonged durations can enhance both female and male reproductive success, but can also result in costs: females of some insect species experience increased fecundity and fertility through male-provided nutrition during prolonged copulations, but also decreased longevity due to male-driven mechanisms. Here, for a common, promiscuous insect species (the squash bug, Anasa tristis), we first describe the range of copulation duration, which spans from 2 min to over 23 h. To investigate whether female A. tristis benefit from prolonged copulation, we next manipulated copulation duration and female diet, and we documented the resulting fecundity, fertility, and longevity of each female. We found no evidence that prolonged copulation durations affect female reproductive success. Females produced fertile eggs after a single 30 min copulation, and they subsequently produced fertile eggs for an additional 4 weeks. Our findings suggest that females do not benefit from prolonged copulations, that sperm transfer occurs very early during copulations, and that females can store sperm for long durations. Consequently, we suggest that female harassment avoidance and male mate-guarding may explain prolonged copulations in this species.
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Affiliation(s)
| | - Flavia Barbosa
- Department of Biology, Lake Forest College, Lake Forest, IL 60045, USA
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15
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Sasson DA, Johnson TD, Scott ER, Fowler-Finn KD. Short-term water deprivation has widespread effects on mating behaviour in a harvestman. Anim Behav 2020. [DOI: 10.1016/j.anbehav.2020.04.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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16
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Dutra AL, Schlindwein C, Oliveira R. Females of a solitary bee reject males to collect food for offspring. Behav Ecol 2020. [DOI: 10.1093/beheco/araa026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
The time dedicated to courtship and copulation is the most general cost of mating for females. However, quantitative estimates of this cost and the consequences for female mating behavior have been investigated for only a few model organisms and mostly under laboratory conditions. We determined the costs of copulations and persistent courtship by males in terms of time for females of the solitary bee Anthrenoides micans. We estimated the rate and duration of male mating behaviors and the consequences for sexual interactions for females with respect to the loss of foraging opportunity in the wild. Males invested most of their time searching for mates and intercepted foraging females every 3 min. Copulas lasted, on average, 10 times longer than the time females took to resist male mating attempts. Despite the high frequency of these rejections (82%), females spent 3-fold more time copulating than rejecting males. Considering the rate of encounters with males and the mean duration of flower visits by females, we estimated that females would perform 64% fewer flower visits per hour if they accepted all copulation attempts. The loss of time is especially significant in the natural habitat of the species, where host cacti blossom for extraordinary short periods of time and females compete with other cacti-specialized bees and conspecifics. Because the offspring production of a female solitary bee depends on its pollen collection capacity, reduced foraging performance directly influences female reproductive success.
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Affiliation(s)
- Ana Laura Dutra
- Programa de Pós-Graduação em Ecologia, Conservação e Manejo da Vida Silvestre, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Clemens Schlindwein
- Departamento de Botânica, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Reisla Oliveira
- Programa de Pós-Graduação em Ecologia, Conservação e Manejo da Vida Silvestre, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, Minas Gerais, Brazil
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, Minas Gerais, Brazil
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17
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Vincent A, Head ML, Iglesias-Carrasco M. Sexual conflict and the environment: teasing apart effects arising via males and females. Anim Behav 2020. [DOI: 10.1016/j.anbehav.2020.01.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Lasala JA, Hughes C, Wyneken J. Female loggerhead sea turtles ( Caretta caretta L.) rarely remate during nesting season. Ecol Evol 2020; 10:163-174. [PMID: 31988720 PMCID: PMC6972835 DOI: 10.1002/ece3.5869] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 08/19/2019] [Indexed: 11/05/2022] Open
Abstract
The goal of this study was to assess the consequences of single versus multiple paternity by identifying paternity of clutches per female to identify whether there were detectable costs or benefits. Multiple mating can occur when the benefits of mating outweigh the costs, but if costs and benefits are equal, no pattern is expected. Previous research on loggerhead sea turtle (Caretta caretta) populations found male-biased breeding sex ratios and multiple mating by many females nesting in southwestern Florida. A sample of nesting loggerhead females who laid more than one nest over the course of the season and a subset of their hatchlings were examined from 36 clutches in 2016 on Sanibel Island, Florida. Males that fathered hatchlings in the first clutch sampled were identified in subsequent clutches. Interestingly, 75% of the females analyzed had mated singly. No male was represented in more than one female's clutches. The results suggest that females likely mate at the beginning of the season and use stored sperm for multiple clutches. Evidence for mating between laying events was limited. There was no consistent pattern across the subsequent multiple paternity clutches, suggesting benefits to loggerhead females likely equal their costs and subsequent mating is likely determined by female preference.
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Affiliation(s)
- Jacob A. Lasala
- Florida Atlantic UniversityBoca RatonFLUSA
- Mote Marine LaboratorySarasotaFLUSA
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19
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Carleial R, McDonald GC, Pizzari T. Dynamic phenotypic correlates of social status and mating effort in male and female red junglefowl, Gallus gallus. J Evol Biol 2019; 33:22-40. [PMID: 31529557 PMCID: PMC6972591 DOI: 10.1111/jeb.13541] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 09/10/2019] [Accepted: 09/11/2019] [Indexed: 11/30/2022]
Abstract
Despite widespread evidence that mating and intrasexual competition are costly, relatively little is known about how these costs dynamically change male and female phenotypes. Here, we test multiple hypotheses addressing this question in replicate flocks of red junglefowl (Gallus gallus). First, we test the interrelationships between social status, comb size (a fleshy ornament) and body mass at the onset of a mating trial. While comb size covaried positively with body mass across individuals of both sexes, comb size was positively related to social status in females but not in males. Second, we test for changes within individuals in body mass and comb size throughout the mating trial. Both body mass and comb size declined at the end of a trial in both sexes, suggesting that mating effort and exposure to the opposite sex are generally costly. Males lost more body mass if they (a) were socially subordinate, (b) were chased by other males or (c) mated frequently, indicating that subordinate status and mating are independently costly. Conversely, females lost more body mass if they were exposed to a higher frequency of coerced matings, suggesting costs associated with male sexual harassment and female resistance, although costs of mating per se could not be completely ruled out. Neither competitive nor mating interactions predicted comb size change in either sex. Collectively, these results support the notion that sex‐specific costs associated with social status and mating effort result in differential, sex‐specific dynamics of phenotypic change.
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Affiliation(s)
- Rômulo Carleial
- Edward Grey Institute, Department of Zoology, University of Oxford, Oxford, UK
| | - Grant C McDonald
- Edward Grey Institute, Department of Zoology, University of Oxford, Oxford, UK.,Department of Ecology, University of Veterinary Medicine Budapest, Budapest, Hungary
| | - Tommaso Pizzari
- Edward Grey Institute, Department of Zoology, University of Oxford, Oxford, UK
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20
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Sloan NS, Simmons LW. The evolution of female genitalia. J Evol Biol 2019; 32:882-899. [PMID: 31267594 DOI: 10.1111/jeb.13503] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 06/14/2019] [Accepted: 06/21/2019] [Indexed: 02/07/2023]
Abstract
Female genitalia have been largely neglected in studies of genital evolution, perhaps due to the long-standing belief that they are relatively invariable and therefore taxonomically and evolutionarily uninformative in comparison with male genitalia. Contemporary studies of genital evolution have begun to dispute this view, and to demonstrate that female genitalia can be highly diverse and covary with the genitalia of males. Here, we examine evidence for three mechanisms of genital evolution in females: species isolating 'lock-and-key' evolution, cryptic female choice and sexual conflict. Lock-and-key genital evolution has been thought to be relatively unimportant; however, we present cases that show how species isolation may well play a role in the evolution of female genitalia. Much support for female genital evolution via sexual conflict comes from studies of both invertebrate and vertebrate species; however, the effects of sexual conflict can be difficult to distinguish from models of cryptic female choice that focus on putative benefits of choice for females. We offer potential solutions to alleviate this issue. Finally, we offer directions for future studies in order to expand and refine our knowledge surrounding female genital evolution.
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Affiliation(s)
- Nadia S Sloan
- Centre for Evolutionary Biology, School of Biological Sciences (M092), The University of Western Australia, Crawley, Western Australia, Australia
| | - Leigh W Simmons
- Centre for Evolutionary Biology, School of Biological Sciences (M092), The University of Western Australia, Crawley, Western Australia, Australia
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21
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Khelifa R. Females "assist" sneaker males to dupe dominant males in a rare endemic damselfly: sexual conflict at its finest. Ecology 2019; 100:e02811. [PMID: 31283010 DOI: 10.1002/ecy.2811] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 05/28/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Rassim Khelifa
- Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada.,Laboratoire Biologie, Eau et Environnement, Faculté SNV-STU, Université 8 Mai 1945, Guelma, 24000, Algeria
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22
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Perez A, Montiglio PO, Wey TW, Sih A. Male social plasticity influences transient dynamics in the emergence of alternative mating systems in water striders. Behav Ecol 2019. [DOI: 10.1093/beheco/arz108] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
AbstractAnimal mating systems are often studied with the goal of understanding why species, populations, or groups vary from one another in the system they display. Although these differences are often treated as basically stable, it is also known that mating systems may shift over time (e.g., from one breeding season to the next). There has been some study of how ecological factors correlate with these changes; however, few, if any, studies have investigated how the phenotypic composition of a group governs the timing and probability of these mating system transitions. Groups of stream water striders (Aquarius remigis) can experience rapid changes in mating system dynamics, with small groups often transitioning into a system in which a single, large male monopolizes mating opportunities. We asked if variation in individual- and group-level traits associated with morphology and behavior (e.g., size of the largest individual, average activity behavioral type in the group) could partially explain the variability in how rapidly groups make this transition, if they make it at all. We show that groups with males that exhibit higher social plasticity tended to take longer to transition to a mating system dominated by a single male. Our results, therefore, suggest that groups in identical ecological conditions can diverge in their mating systems based on how much individuals in the group change their behavior in response to the behavior of other members of the group.
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Affiliation(s)
- Adrian Perez
- Department of Entomology, University of California at Davis, Davis, CA, USA
| | - Pierre-Olivio Montiglio
- Department of Environmental Sciences and Policy, University of California at Davis, Davis, CA, USA
- Université du Québec à Montréal, Montréal, Quebec, Canada
| | - Tina W Wey
- Department of Environmental Sciences and Policy, University of California at Davis, Davis, CA, USA
- Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Andrew Sih
- Department of Environmental Sciences and Policy, University of California at Davis, Davis, CA, USA
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23
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Reinhardt K, Voigt D, Gorb SN. Evidence for a sexually selected function of the attachment system in bedbugs Cimex lectularius (Heteroptera, Cimicidae). J Exp Biol 2019; 222:jeb.206136. [PMID: 31053647 DOI: 10.1242/jeb.206136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 04/29/2019] [Indexed: 11/20/2022]
Abstract
Attachment to surfaces is a major aspect of an animal's interaction with the environment. Consequently, shaping of the attachment system in relation to weight load and substrate is considered to have occurred mainly by natural selection. However, sexual selection may also be important because many animals attach to their partner during mating. The two hypotheses generate opposing predictions in species where males are smaller than females. Natural selection predicts that attachment ability will scale positively with load, and hence body size, and so will be larger in females than males. Sexual selection predicts attachment forces in males will be larger than those in females, despite the males' smaller size because males benefit from uninterrupted copulation by stronger attachment to the female. We tested these predictions in the common bedbug Cimex lectularius, a species in which both sexes, as well as nymphs, regularly carry large loads: blood meals of up to 3 times their body weight. By measuring attachment forces to smooth surfaces and analysing in situ fixed copulating pairs and the morphology of attachment devices, we show that: (i) males generate twice the attachment force of females, despite weighing 15% less; (ii) males adhere to females during copulation using hairy tibial adhesive pads; (iii) there are more setae, and more setae per unit area, in the pads of males than in those of females but there is no difference in the shape of the tarsal setae; and (iv) there is an absence of hairy tibial attachment pads and a low attachment force in nymphs. These results are consistent with a sexually selected function of attachment in bedbugs. Controlling sperm transfer and mate guarding by attaching to females during copulation may also shape the evolution of male attachment structures in other species. More generally, we hypothesise the existence of an arms race in terms of male attachment structures and female counterparts to impede attachment, which may result in a similar evolutionary diversification to male genitalia.
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Affiliation(s)
- Klaus Reinhardt
- Applied Zoology, Faculty of Biology, Technische Universität Dresden, D-01062 Dresden, Germany .,Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK
| | - Dagmar Voigt
- Institute for Botany, Faculty of Biology, Technische Universität Dresden, D-01062 Dresden, Germany
| | - Stanislav N Gorb
- Department of Functional Morphology and Biomechanics, Zoological Institute, Christian-Albrechts-Universität zu Kiel, Am Botanischen Garten 1-9, D-24098 Kiel, Germany
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24
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Singh P, Mishra G, Omkar. Influence of body size and familiarity on mating and reproductive parameters in the zig-zag ladybird beetle, Menochilus sexmaculatus (Coleoptera: Coccinellidae). CAN J ZOOL 2019. [DOI: 10.1139/cjz-2017-0344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Body size often indicates an individual’s quality and so mate selection is typically for larger individuals, including in ladybirds (Coccinellidae). Many organisms including ladybirds are also are known to refuse mating attempts with familiar individuals, but whether at the expense of mating with larger individuals is not clear. We assessed the cumulative effect of body size and familiarity on mating and reproductive behaviour in the zig-zag ladybird beetle (Menochilus sexmaculatus (Fabricius, 1781) = Cheilomenes sexmaculata (Fabricius, 1781)). For this study, individuals were separated into small- and large-bodied individuals and allowed to mate in all possible combinations. Furthermore, following the first mating, an immediate second mating was provided to the males, with either a familiar (same as in the first mating) or an unfamiliar (new female with the same mating status) female. Mating and reproductive parameters were recorded. The mating duration was longer with familiar partners than unfamiliar individuals. Mating duration was shorter for the second mating, suggesting that mating and ejaculate transfer are costly, to assure higher reproductive success. In this ladybird beetle, familiarity modified mating duration, whereas fecundity and egg viability were influenced by body size.
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Affiliation(s)
- Priya Singh
- Ladybird Research Laboratory, Department of Zoology, University of Lucknow, Lucknow 226007, India
- Ladybird Research Laboratory, Department of Zoology, University of Lucknow, Lucknow 226007, India
| | - Geetanjali Mishra
- Ladybird Research Laboratory, Department of Zoology, University of Lucknow, Lucknow 226007, India
- Ladybird Research Laboratory, Department of Zoology, University of Lucknow, Lucknow 226007, India
| | - Omkar
- Ladybird Research Laboratory, Department of Zoology, University of Lucknow, Lucknow 226007, India
- Ladybird Research Laboratory, Department of Zoology, University of Lucknow, Lucknow 226007, India
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25
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Female resistance and harmonic convergence influence male mating success in Aedes aegypti. Sci Rep 2019; 9:2145. [PMID: 30765779 PMCID: PMC6375921 DOI: 10.1038/s41598-019-38599-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 12/21/2018] [Indexed: 01/01/2023] Open
Abstract
Despite the importance of mosquito mating biology to reproductive control strategies, a mechanistic understanding of individual mating interactions is currently lacking. Using synchronised high-speed video and audio recordings, we quantified behavioural and acoustic features of mating attempts between tethered female and free-flying male Aedes aegypti. In most couplings, males were actively displaced by female kicks in the early phases of the interaction, while flight cessation prior to adoption of the pre-copulatory mating pose also inhibited copulation. Successful males were kicked at a reduced rate and sustained paired contact-flight for longer than those that were rejected. We identified two distinct phases of acoustic interaction. Rapid frequency modulation of flight tones was observed in all interactions up to acceptance of the male. Harmonic convergence (wingbeat frequency matching) was detected more often in successful attempts, coinciding with the transition to stabilised paired flight and subsequent genital contact. Our findings provide a clearer understanding of the relationship between acoustic interactions and mating performance in mosquitoes, offering insights which may be used to target improvements in laboratory reared lines.
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26
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Lipkowski K, Plath M, Klaus S, Sommer-Trembo C. Population density affects male mate choosiness and morphology in the mate-guarding amphipodGammarus roeselii(Crustacea: Amphipoda). Biol J Linn Soc Lond 2019. [DOI: 10.1093/biolinnean/bly201] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Konrad Lipkowski
- Department of Wildlife-/Zoo-Animal Biology and Systematics, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Martin Plath
- College of Animal Science and Technology, Northwest A&F University, Yangling, PR China
| | - Sebastian Klaus
- Department of Ecology and Evolution, Goethe University Frankfurt, Frankfurt am Main, Germany
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27
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Swierk L, Langkilde T. Fitness costs of mating with preferred females in a scramble mating system. Behav Ecol 2019. [DOI: 10.1093/beheco/arz001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Abstract
Little is known about the operation of male mate choice in systems with perceived high costs to male choosiness. Scramble mating systems are one type of system in which male choice is often considered too costly to be selected. However, in many scramble mating systems, there are also potentially high rewards of male choosiness, as females vary dramatically in reproductive output and males typically mate once per season and/or per lifetime. Using scramble mating wood frogs (Rana sylvatica), we tested whether males gain fitness benefits by mating with preferred females. We conducted choice trials (1 male presented simultaneously with 2 females) and permitted males to mate with their preferred or nonpreferred female. Offspring of preferred and nonpreferred females were reared in the laboratory and field, and we quantified various fitness-relevant parameters, including survivorship and growth rates. Across multiple parameters measured, matings with preferred females produced fewer and lower-quality offspring than did those with nonpreferred females. Our results are inconsistent with the idea that mate choice confers benefits on the choosing sex. We instead propose that, in scramble systems, males will be more likely to amplex females that are easier to capture, which may correlate with lower quality but increases male likelihood of successfully mating. Such male choice may not favor increased fitness when the operational sex ratio is less biased toward males in scramble mating systems but is, instead, a bet-hedging tactic benefitting males when available females are limited.
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Affiliation(s)
- Lindsey Swierk
- Department of Biology, Intercollege Graduate Program in Ecology, and Center for Brain, Behavior and Cognition, The Pennsylvania State University, PA, USA
| | - Tracy Langkilde
- Department of Biology, Intercollege Graduate Program in Ecology, and Center for Brain, Behavior and Cognition, The Pennsylvania State University, PA, USA
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28
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Wardlaw AM, Agrawal AF. Sexual Conflict and Sexually Transmitted Infections (STIs): Coevolution of Sexually Antagonistic Host Traits with an STI. Am Nat 2018; 193:E1-E14. [PMID: 30624111 DOI: 10.1086/700564] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In many taxa, there is a conflict between the sexes over mating rate. The outcome of sexually antagonistic coevolution depends on the costs of mating and natural selection against sexually antagonistic traits. A sexually transmitted infection (STI) changes the relative strength of these costs. We study the three-way evolutionary interaction among male persistence, female resistance, and STI virulence for two types of STIs: a viability-reducing STI and a reproduction-reducing STI. A viability-reducing STI escalates conflict between the sexes. This leads to increased STI virulence (i.e., full coevolution) if the costs of sexually antagonistic traits occur through viability but not through reproduction. In contrast, a reproduction-reducing STI de-escalates the sexual conflict, but STI virulence does not coevolve in response. We also investigated the establishment probability of STIs under different combinations of evolvability. Successful invasion by a viability-reducing STI becomes less likely if hosts (but not parasites) are evolvable, especially if only the female trait can evolve. A reproduction-reducing STI can almost always invade because it does not kill its host. We discuss how the evolution of host and parasite traits in a system with sexual conflict differs from a system with female mate choice.
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29
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Lubanga U, Peters R, Steinbauer M. Convenience polyandry and the role of lone and reciprocal calls in a psyllid. Anim Behav 2018. [DOI: 10.1016/j.anbehav.2018.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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30
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Boulton RA, Zuk M, Shuker DM. An Inconvenient Truth: The Unconsidered Benefits of Convenience Polyandry. Trends Ecol Evol 2018; 33:904-915. [PMID: 30376988 DOI: 10.1016/j.tree.2018.10.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 09/19/2018] [Accepted: 10/02/2018] [Indexed: 12/22/2022]
Abstract
Polyandry, or multiple mating by females with different males, is commonplace. One explanation is that females engage in convenience polyandry, mating multiple times to reduce the costs of sexual harassment. Although the logic underlying convenience polyandry is clear, and harassment often seems to influence mating outcomes, it has not been subjected to as thorough theoretical or empirical attention as other explanations for polyandry. We re-examine here convenience polyandry in the light of new studies demonstrating previously unconsidered benefits of polyandry. We suggest that true convenience polyandry is likely to be a fleeting phenomenon, even though it can profoundly shape mating-system evolution via potential feedback loops between resistance to males and the costs and benefits of mating.
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Affiliation(s)
- Rebecca A Boulton
- College of Life and Environmental Sciences, University of Exeter, Penryn, Cornwall TR10 9FE, UK; Department of Entomology, University of Minnesota, St Paul, MN 55108, USA; School of Biology, University of St Andrews, St Andrews KY16 9TH, UK.
| | - Marlene Zuk
- Department of Ecology, Evolution and Behavior, University of Minnesota, St Paul, MN 55108, USA
| | - David M Shuker
- School of Biology, University of St Andrews, St Andrews KY16 9TH, UK
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31
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Moss JB, Gerber GP, Schwirian A, Jackson AC, Welch ME. Evidence for dominant males but not choosy females in an insular rock iguana. Behav Ecol 2018. [DOI: 10.1093/beheco/ary131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Jeanette B Moss
- Biological Sciences Department, Mississippi State University, Mississippi State, MS, USA
| | - Glenn P Gerber
- Institute for Conservation Research, San Diego Zoo Global, Escondido, CA, USA
| | - Aumbriel Schwirian
- Biological Sciences Department, Mississippi State University, Mississippi State, MS, USA
| | - Anna C Jackson
- Biological Sciences Department, Mississippi State University, Mississippi State, MS, USA
| | - Mark E Welch
- Biological Sciences Department, Mississippi State University, Mississippi State, MS, USA
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32
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Boratyński Z, Koskela E, Mappes T, Mills SC, Mokkonen M. Maintenance costs of male dominance and sexually antagonistic selection in the wild. Funct Ecol 2018. [DOI: 10.1111/1365-2435.13216] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Zbyszek Boratyński
- CIBIO/InBIOResearch Center in Biodiversity and Genetic ResourcesUniversity of Porto, Vairão Vairão Portugal
- Department of Biological and Environmental ScienceUniversity of Jyväskylä Jyväskylä Finland
| | - Esa Koskela
- Department of Biological and Environmental ScienceUniversity of Jyväskylä Jyväskylä Finland
| | - Tapio Mappes
- Department of Biological and Environmental ScienceUniversity of Jyväskylä Jyväskylä Finland
| | - Suzanne C. Mills
- Department of Biological and Environmental ScienceUniversity of Jyväskylä Jyväskylä Finland
- PSL Université Paris: EPHE‐UPVD‐CNRS, USR 3278 CRIOBE Papetoai, Moorea French Polynesia
- Laboratoire d'Excellence “CORAIL” Corail France
| | - Mikael Mokkonen
- Department of Biological and Environmental ScienceUniversity of Jyväskylä Jyväskylä Finland
- Department of Biological SciencesSimon Fraser University Burnaby British Columbia Canada
- Department of BiologyKwantlen Polytechnic University Surrey British Columbia Canada
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33
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The fitness cost to females of exposure to males does not depend on water availability in seed beetles. Anim Behav 2018. [DOI: 10.1016/j.anbehav.2018.06.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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34
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Does sexual conflict increase juvenile survival by reducing cannibalism? Behav Processes 2018; 157:438-444. [PMID: 30017871 DOI: 10.1016/j.beproc.2018.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 06/19/2018] [Accepted: 07/10/2018] [Indexed: 11/20/2022]
Abstract
To test the hypothesis that male harassment of females reduces adult female time spent on the water foraging (water use), and thus cannibalism by adult females on juveniles, we manipulated heterospecific prey availability, and social context in adult water striders and measured their effects on: 1) cannibalism of juveniles, 2) activity of adults and 3) habitat use of adults and juveniles. Cannibalism rarely occurred with alternative prey present, but was common without alternative prey. Without alternative prey, females cannibalized much more than males, but contrary to predictions, male presence did not reduce cannibalism rates. Male presence decreased female water use; however, this was counteracted by the fact that the lack of alternative prey increased female water use and activity while on the water. Furthermore, in groups of 4 males with 4 females, lack of alternative prey reduced male activity while on the water. Thus the predicted negative effect of sexual conflict on cannibalism was reduced by female and male responses to low food availability. Juveniles increased time off the water when more females or males were more on the water and active. Overall, cannibalism rates depended on alternative prey, male-female social dynamics, female foraging and juvenile refuge use.
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35
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Loo J, Kennington WJ, de Lestang S, How J, Evans JP. High levels of polyandry, but limited evidence for multiple paternity, in wild populations of the western rock lobster ( Panulirus cygnus). Ecol Evol 2018; 8:4525-4533. [PMID: 29760893 PMCID: PMC5938460 DOI: 10.1002/ece3.3985] [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: 01/21/2018] [Revised: 02/07/2018] [Accepted: 02/09/2018] [Indexed: 01/01/2023] Open
Abstract
Polyandry, where multiple mating by females results in the temporal and spatial overlap of ejaculates from two or more males, is taxonomically widespread and occurs in varying frequencies within and among species. In decapods (crabs, lobsters, crayfish, and prawns), rates of polyandry are likely to be variable, but the extent to which patterns of multiple paternity reflect multiple mating, and thus are shaped by postmating processes that bias fertilization toward one or a subset of mated males, is unclear. Here, we use microsatellite markers to examine the frequency of multiple mating (the presence of spermatophores from two or more males) and patterns of paternity in wild populations of western rock lobster (Panulirus cygnus). Our data confirm that >45% of females had attached spermatophores arising from at least two males (i.e., confirming polyandry), but we found very limited evidence for multiple paternity; among 24 clutches sampled in this study, only two arose from fertilizations by two or more males. Single inferred paternal genotypes accounted for all remaining progeny genotypes in each clutch, including several instances when the mother had been shown to mate with two or more males. These findings highlight the need for further work to understand whether polyandry is adaptive and to uncover the mechanisms underlying postmating paternity biases in this system.
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Affiliation(s)
- Jacqueline Loo
- Centre for Evolutionary Biology School of Biological Sciences The University of Western Australia Crawley WA Australia
| | - Winn Jason Kennington
- Centre for Evolutionary Biology School of Biological Sciences The University of Western Australia Crawley WA Australia
| | - Simon de Lestang
- Western Australian Fisheries and Marine Research Laboratories North Beach WA Australia
| | - Jason How
- Western Australian Fisheries and Marine Research Laboratories North Beach WA Australia
| | - Jonathan P Evans
- Centre for Evolutionary Biology School of Biological Sciences The University of Western Australia Crawley WA Australia
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36
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Postcopulatory Reproductive Strategies in Spermatozoa. DIVERSITY AND COMMONALITY IN ANIMALS 2018. [DOI: 10.1007/978-4-431-56609-0_22] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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37
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Baruffaldi L, Andrade MCB. Neutral fitness outcomes contradict inferences of sexual 'coercion' derived from male's damaging mating tactic in a widow spider. Sci Rep 2017; 7:17322. [PMID: 29229932 PMCID: PMC5725485 DOI: 10.1038/s41598-017-17524-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 11/08/2017] [Indexed: 11/13/2022] Open
Abstract
Sexual conflict over mating frequency has driven the evolution of morphological and behavioural traits across taxa. Interactions may be termed ‘coercive’ and assumed to arise from conflict when male mating behaviours cause physical injury to females and females appear to resist injurious matings.However, coercion per se occurs only if the behaviour reduces female fitness; and such outcomes are rarely measured. Here we show that a damaging mating tactic, apparently adaptive for males, is not coercive for females. Adult male Latrodectus spiders mate with immature females after tearing the exoskeleton covering the female’s recently-developed reproductive tract, which can cause haemolymph bleeding. We show that, relative to pairings with adult females, males use reduced courtship displays when approaching immature females, which in some cases respond with elevated deterrent behavioural responses. Nevertheless, we found no reproductive cost for immature-mated females in terms of longevity, fertility or fecundity. Moreover, most immature-mated females did not produce sex pheromones as adults, so did not seek additional matings. Thus, despite the appearance of conflict there is no evidence that immature-mating is coercive. These results show it is critical to measure fitness outcomes, in addition to behavioural responses, to test for coercion.
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Affiliation(s)
- Luciana Baruffaldi
- Departments of Biological Sciences and Ecology & Evolutionary Biology, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada.
| | - Maydianne C B Andrade
- Departments of Biological Sciences and Ecology & Evolutionary Biology, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada
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38
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Lee PLM, Schofield G, Haughey RI, Mazaris AD, Hays GC. A Review of Patterns of Multiple Paternity Across Sea Turtle Rookeries. ADVANCES IN MARINE BIOLOGY 2017; 79:1-31. [PMID: 30012274 DOI: 10.1016/bs.amb.2017.09.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Why females would mate with multiple partners and have multiple fathers for clutches or litters is a long-standing enigma. There is a broad dichotomy in hypotheses ranging from polyandry having benefits to simply being an unavoidable consequence of a high incidence of male-female encounters. If females simply give in to mating when it is too costly to avoid being harassed by males (convenience polyandry), then there should be a higher rate of mating as density increases. However, if females actively seek males because they benefit from multiple mating, then mating frequency, and consequently the incidence of multiple paternity of clutches, should be high throughout. To explore these competing explanations, here we review the incidence of multiple paternity for sea turtles nesting around the World. Across 30 rookeries, including all 7 species of sea turtle, the incidence of multiple paternity was only weakly linked to rookery size (r2=0.14). However, using high resolution at-sea GPS tracking we show that the specifics of movement patterns play a key role in driving packing density and hence the likely rate of male-female encounters. When individuals use the same focal areas, packing density could be 100× greater than when assuming individuals move independently. Once the extent of adult movements in the breeding season was considered so that movements and abundance could be combined to produce a measure of density, then across rookeries we found a very tight relationship (r2=0.96) between packing density and the incidence of multiple paternity. These findings suggest that multiple paternity in sea turtles may have no benefit, but is simply a consequence of the incidence of male-female encounters.
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Affiliation(s)
- Patricia L M Lee
- Centre for Integrative Ecology, Deakin University, Geelong, VIC, Australia
| | - Gail Schofield
- Centre for Integrative Ecology, Deakin University, Geelong, VIC, Australia
| | - Rebecca I Haughey
- Centre for Integrative Ecology, Deakin University, Geelong, VIC, Australia
| | - Antonios D Mazaris
- School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Graeme C Hays
- Centre for Integrative Ecology, Deakin University, Geelong, VIC, Australia.
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39
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Kasimatis KR, Nelson TC, Phillips PC. Genomic Signatures of Sexual Conflict. J Hered 2017; 108:780-790. [PMID: 29036624 PMCID: PMC5892400 DOI: 10.1093/jhered/esx080] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2017] [Accepted: 09/18/2017] [Indexed: 02/06/2023] Open
Abstract
Sexual conflict is a specific class of intergenomic conflict that describes the reciprocal sex-specific fitness costs generated by antagonistic reproductive interactions. The potential for sexual conflict is an inherent property of having a shared genome between the sexes and, therefore, is an extreme form of an environment-dependent fitness effect. In this way, many of the predictions from environment-dependent selection can be used to formulate expected patterns of genome evolution under sexual conflict. However, the pleiotropic and transmission constraints inherent to having alleles move across sex-specific backgrounds from generation to generation further modulate the anticipated signatures of selection. We outline methods for detecting candidate sexual conflict loci both across and within populations. Additionally, we consider the ability of genome scans to identify sexually antagonistic loci by modeling allele frequency changes within males and females due to a single generation of selection. In particular, we highlight the need to integrate genotype, phenotype, and functional information to truly distinguish sexual conflict from other forms of sexual differentiation.
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Affiliation(s)
- Katja R Kasimatis
- Institute of Ecology and Evolution, University of Oregon, Eugene, OR 97403, USA
| | - Thomas C Nelson
- Institute of Ecology and Evolution, University of Oregon, Eugene, OR 97403, USA
| | - Patrick C Phillips
- Institute of Ecology and Evolution, University of Oregon, Eugene, OR 97403, USA
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40
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Brown SDJ. Austromonticola, a new genus of broad-nosed weevil (Coleoptera, Curculionidae, Entiminae) from montane areas of New Zealand. Zookeys 2017; 707:73-130. [PMID: 29118629 PMCID: PMC5674147 DOI: 10.3897/zookeys.707.12649] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 08/20/2017] [Indexed: 11/16/2022] Open
Abstract
Austromonticolagen. n. is proposed for a group of eight New Zealand alpine broad-nosed weevil species, all of which are here described: A. atriariussp. n. (type locality: Umbrella Mountains, Central Otago), A. caelibatussp. n. (type locality: Ohau Range, Mackenzie), A. furcatussp. n. (type locality: Old Man Range, Central Otago), A. inflatussp. n. (type locality: Hawkdun Range, Central Otago), A. planulatussp. n. (type locality: St Marys Range, Central Otago), A. postinventussp. n. (type locality: Kirkliston Range, South Canterbury), A. mataurasp. n. (type locality: Mt Dick, Otago Lakes) and A. rotundussp. n. (type locality: Old Man Range, Central Otago). All species occur exclusively above 1000 m elevation in the mountains of Central Otago and South Canterbury in the South Island. A phylogeny of the genus, including six outgroups, was inferred from 33 morphological characters. It resolved the genus as monophyletic, and revealed two strongly supported clades within Austromonticola. DNA sequences of four gene regions were obtained from five species. Of these, the 3' end of COI proved to be the most suitable for the identification of specimens. Females of all species have diagnostic secondary sexual structures on the elytra and ventrites. These structures are hypothesised to have evolved to assist with oviposition in and beside cushion plants or by selection for structures to mitigate the costs to females of prolonged mating.
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Affiliation(s)
- Samuel D. J. Brown
- Bio-Protection Research Centre, PO Box 85084, Lincoln University 7647, Canterbury, New Zealand
- AgResearch, Gerald St, Lincoln, Canterbury, New Zealand
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41
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Iltis C, Dechaume-Moncharmont FX, Galipaud M, Moreau J, Bollache L, Louâpre P. The curse of being single: both male and female Gammarus pulex benefit energetically from precopulatory mate guarding. Anim Behav 2017. [DOI: 10.1016/j.anbehav.2017.06.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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42
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Multiple paternity in the cultured yellow pond turtles ( Mauremys mutica ). Anim Reprod Sci 2017; 183:46-55. [DOI: 10.1016/j.anireprosci.2017.06.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Revised: 05/28/2017] [Accepted: 06/08/2017] [Indexed: 11/21/2022]
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43
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Schraft HA. Mobility cost of copulation is independent of female: Male size ratio in Anasa tristis. SOUTHWEST NAT 2017. [DOI: 10.1894/0038-4909-62.2.162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Hannes A. Schraft
- Graduate Group in Ecology, Department of Neurobiology, Physiology, and Behavior, University of California, Davis, CA 95616
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44
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Pandulli-Alonso I, Quaglia A, Albo MJ. Females of a gift-giving spider do not trade sex for food gifts: a consequence of male deception? BMC Evol Biol 2017; 17:112. [PMID: 28506206 PMCID: PMC5433081 DOI: 10.1186/s12862-017-0953-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 04/12/2017] [Indexed: 11/25/2022] Open
Abstract
Background Polyandry is commonly maintained by direct benefits in gift-giving species, so females may remate as an adaptive foraging strategy. However, the assumption of a direct benefit fades in mating systems where male gift-giving behaviour has evolved from offering nutritive to worthless (non-nutritive) items. In the spider Paratrechalea ornata, 70% of gifts in nature are worthless. We therefore predicted female receptivity to be independent of hunger in this species. We exposed poorly-fed and well-fed females to multiple males offering nutritive gifts and well-fed females to males offering worthless gifts. Results Though the treatments strongly affected fecundity, females of all groups had similar number of matings. This confirms that female receptivity is independent of their nutritional state, i.e. polyandry does not prevail as a foraging strategy. Conclusions In the spider Pisaura mirabilis, in which the majority (62%) of gifts in nature are nutritive, female receptivity depends on hunger. We therefore propose that the dependence of female receptivity on hunger state may have evolved in species with predominantly nutritive gifts but is absent in species with predominantly worthless gifts. Electronic supplementary material The online version of this article (doi:10.1186/s12862-017-0953-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Irene Pandulli-Alonso
- Laboratorio de Etología, Ecología y Evolución, Instituto de Investigaciones Biológicas Clemente Estable, Avenida Italia, 3318, Montevideo, Uruguay
| | - Agustín Quaglia
- Laboratorio de Arbovirus-Instituto de Virología "Dr. J. M. Vanella"-Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Maria J Albo
- Laboratorio de Etología, Ecología y Evolución, Instituto de Investigaciones Biológicas Clemente Estable, Avenida Italia, 3318, Montevideo, Uruguay.
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45
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Montiglio PO, Wey TW, Sih A. Effects of the group’s mix of sizes and personalities on the emergence of alternative mating systems in water striders. Behav Ecol 2017. [DOI: 10.1093/beheco/arx070] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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46
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Taylor LA, Powell EC, McGraw KJ. Frequent misdirected courtship in a natural community of colorful Habronattus jumping spiders. PLoS One 2017; 12:e0173156. [PMID: 28379968 PMCID: PMC5381776 DOI: 10.1371/journal.pone.0173156] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2016] [Accepted: 02/15/2017] [Indexed: 11/18/2022] Open
Abstract
Male courtship display is common in many animals; in some cases, males engage in courtship indiscriminately, spending significant time and energy courting heterospecifics with whom they have no chance of mating or producing viable offspring. Due to high costs and few if any benefits, we might expect mechanisms to evolve to reduce such misdirected courtship (or ‘reproductive interference’). In Habronattus jumping spiders, males frequently court heterospecifics with whom they do not mate or hybridize; females are larger and are voracious predators, posing a severe risk to males who court indiscriminately. In this study, we examined patterns of misdirected courtship in a natural community of four sympatric Habronattus species (H. clypeatus, H. hallani, H. hirsutus, and H. pyrrithrix). We used direct field observations to weigh support for two hypotheses (differential microhabitat use and species recognition signaling) to explain how these species reduce the costs associated with misdirected courtship. We show that, while the four species of Habronattus do show some differences in microhabitat use, all four species still overlap substantially, and in three of the four species individuals equally encountered heterospecifics and conspecifics. Males courted females at every opportunity, regardless of species, and in some cases, this led to aggression and predation by the female. These results suggest that, while differences in microhabitat use might reduce misdirected courtship to some extent, co-existence of these four species may be possible due to complex communication (i.e. species-specific elements of a male’s courtship display). This study is the first to examine misdirected courtship in jumping spiders. Studies of misdirected courtship and its consequences in the field are limited and may broaden our understanding of how biodiversity is maintained within a community.
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Affiliation(s)
- Lisa A. Taylor
- Entomology and Nematology Department, University of Florida, Gainesville, Florida, United States of America
- Florida Museum of Natural History, University of Florida, Gainesville, Florida, United States of America
- School of Life Sciences, Arizona State University, Tempe, Arizona, United States of America
- * E-mail:
| | - Erin C. Powell
- Entomology and Nematology Department, University of Florida, Gainesville, Florida, United States of America
- School of Biological Sciences University of Auckland, Auckland, New Zealand
| | - Kevin J. McGraw
- School of Life Sciences, Arizona State University, Tempe, Arizona, United States of America
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Kawazu K, Sugeno W, Mochizuki A, Nakamura S. Polyandry increases reproductive performance but does not decrease survival in female Brontispa longissima. BULLETIN OF ENTOMOLOGICAL RESEARCH 2017; 107:165-173. [PMID: 27573004 DOI: 10.1017/s0007485316000730] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The costs and benefits of polyandry are still not well understood. We studied the effects of multiple mating on the reproductive performance of female Brontispa longissima (Coleoptera: Chrysomelidae), one of the most serious pests of the coconut palm, by using three experimental treatments: (1) singly-mated females (single treatment); (2) females that mated 10 times with the same male (repetition treatment); and (3) females that mated once with each of 10 different males (polyandry treatment). Both multiple mating treatments resulted in significantly greater total egg production and the proportion of eggs that successfully hatched (hatching success) than with the single mating treatment. Furthermore, the polyandry treatment resulted in greater total egg production and hatching success than with the repetition treatment. Thus, mate diversity may affect the direct and indirect benefits of multiple mating. Female longevity, the length of the preoviposition period, the length of the period from emergence to termination of oviposition, and the length of the ovipositing period did not differ among treatments. The pronounced fecundity and fertility benefits that females gain from multiple mating, coupled with a lack of longevity costs, apparently explain the extreme polyandry in B. longissima.
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Affiliation(s)
- K Kawazu
- National Institute for Agro-Environmental Sciences,Tsukuba,Ibaraki 305-8604,Japan
| | - W Sugeno
- National Institute for Agro-Environmental Sciences,Tsukuba,Ibaraki 305-8604,Japan
| | - A Mochizuki
- National Institute for Agro-Environmental Sciences,Tsukuba,Ibaraki 305-8604,Japan
| | - S Nakamura
- Japan International Research Centre for Agricultural Sciences,1-1 Owashi,Tsukuba,Ibaraki 305-8686,Japan
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48
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Sih A, Montiglio PO, Wey TW, Fogarty S. Altered physical and social conditions produce rapidly reversible mating systems in water striders. Behav Ecol 2017. [DOI: 10.1093/beheco/arx021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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49
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Montiglio PO, Wey TW, Chang AT, Fogarty S, Sih A. Correlational selection on personality and social plasticity: morphology and social context determine behavioural effects on mating success. J Anim Ecol 2017; 86:213-226. [PMID: 27859289 DOI: 10.1111/1365-2656.12610] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Accepted: 11/03/2016] [Indexed: 11/28/2022]
Abstract
Despite a central line of research aimed at quantifying relationships between mating success and sexually dimorphic traits (e.g., ornaments), individual variation in sexually selected traits often explains only a modest portion of the variation in mating success. Another line of research suggests that a significant portion of the variation in mating success observed in animal populations could be explained by correlational selection, where the fitness advantage of a given trait depends on other components of an individual's phenotype and/or its environment. We tested the hypothesis that interactions between multiple traits within an individual (phenotype dependence) or between an individual's phenotype and its social environment (context dependence) can select for individual differences in behaviour (i.e., personality) and social plasticity. To quantify the importance of phenotype- and context-dependent selection on mating success, we repeatedly measured the behaviour, social environment and mating success of about 300 male stream water striders, Aquarius remigis. Rather than explaining individual differences in long-term mating success, we instead quantified how the combination of a male's phenotype interacted with the immediate social context to explain variation in hour-by-hour mating decisions. We suggest that this analysis captures more of the mechanisms leading to differences in mating success. Males differed consistently in activity, aggressiveness and social plasticity. The mating advantage of these behavioural traits depended on male morphology and varied with the number of rival males in the pool, suggesting mechanisms selecting for consistent differences in behaviour and social plasticity. Accounting for phenotype and context dependence improved the amount of variation in male mating success we explained statistically by 30-274%. Our analysis of the determinants of male mating success provides important insights into the evolutionary forces that shape phenotypic variation. In particular, our results suggest that sexual selection is likely to favour individual differences in behaviour, social plasticity (i.e., individuals adjusting their behaviour), niche preference (i.e., individuals dispersing to particular social conditions) or social niche construction (i.e., individuals modifying the social environment). The true effect of sexual traits can only be understood in interaction with the individual's phenotype and environment.
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Affiliation(s)
- Pierre-Olivier Montiglio
- Department of Environmental Sciences & Policy, University of California at Davis, One Shields Avenue, Davis, CA, 95616, USA.,Department of Biology & Redpath Museum, McGill University, 1205 Dr-Penfield Avenue, Montreal, QC, H3A 1B1, Canada
| | - Tina W Wey
- Department of Environmental Sciences & Policy, University of California at Davis, One Shields Avenue, Davis, CA, 95616, USA.,Département des Sciences Biologiques, Université du Québec à Montréal, 141 Avenue du Président-Kennedy, Montreal, QC, H2X 1Y4, Canada
| | - Ann T Chang
- Department of Environmental Sciences & Policy, University of California at Davis, One Shields Avenue, Davis, CA, 95616, USA
| | - Sean Fogarty
- Department of Environmental Sciences & Policy, University of California at Davis, One Shields Avenue, Davis, CA, 95616, USA
| | - Andrew Sih
- Department of Environmental Sciences & Policy, University of California at Davis, One Shields Avenue, Davis, CA, 95616, USA
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50
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Pineaux M, Turgeon J. Behavioural Consistency in Female Resistance to Male Harassment in a Water Strider Species. Ethology 2016. [DOI: 10.1111/eth.12575] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maxime Pineaux
- Département de Biologie; Université Laval; Québec QC Canada
| | - Julie Turgeon
- Département de Biologie; Université Laval; Québec QC Canada
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