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Abstract
Mating produces profound changes in the behavior of female flies, such as an increase in oviposition, reduction in sexual receptivity, increase in feeding, and even excretion. Many of these changes are produced by copulation, sperm, and accessory gland products that males transfer to females during mating. Our knowledge on the function of the male ejaculate and its effect on female insects is still incipient. In this article, we review peri- and postcopulatory behaviors in tephritid flies. We address the effects of male copulatory behavior; copula duration; and the male ejaculate, sperm, and accessory gland products on female remating behavior. Many species from these families are pests of economic importance; thus, understanding male mating effects on female behavior contributes to both developing more effective environmentally friendly control methods and furthering our understanding of evolutionary implications of intersexual competition and sexual conflict.
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Affiliation(s)
| | - Solana Abraham
- Laboratorio de Investigaciones Ecoetológicas de Moscas de la Fruta y sus Enemigos Naturales (LIEMEN), PROIMI-Biotecnología, CONICET, San Miguel de Tucumán, Tucumán, Argentina
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Morimoto J. Larval crowding effects during early development in the Chinese oak silkmoth Antheraea pernyi (Lepidoptera: Saturniidae). Ecol Evol 2022; 12:e9283. [PMID: 36110887 PMCID: PMC9465191 DOI: 10.1002/ece3.9283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 07/29/2022] [Accepted: 08/24/2022] [Indexed: 11/21/2022] Open
Abstract
Chinese sericulture relies in part on the rearing of the Chinese oak silkmoth Antheraea pernyi, an insect with key cultural and ecological roles. While feeding primarily on oak, Antheraea species are known to accept alternative hosts such as birch Betula sp with little to no apparent negative fitness consequences. This opens up the range of hostplants that could be used for large‐scale rearing of A. pernyi for silk production and food, or used by this species in possible invasions. To date, however, the natural history and ecology of A. pernyi remain subject of investigation. For instance, we still do not know how individuals respond to crowding developmental environments, which is an important factor to consider for the ecology of the species as well as for commercial rearing. Here, I describe the implications of larval crowding to the survival and growth of A. pernyi larvae during early development. I show that higher crowding is associated with stronger negative effects on growth and survival, corroborating findings from other holometabolous insects. I then discuss the implications of this findings for our understanding of optimum larval crowding. Overall, the findings reveal important ecological information for an insect species key for provisioning and cultural ecosystem services.
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Affiliation(s)
- Juliano Morimoto
- School of Biological Sciences University of Aberdeen, Zoology Building Aberdeen UK.,Programa de Pós-graduação em Ecologia e Conservação Universidade Federal do Paraná Curitiba Brazil
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Majumder R, Taylor PW, Chapman TA. Dynamics of the Queensland Fruit Fly Microbiome through the Transition from Nature to an Established Laboratory Colony. Microorganisms 2022; 10:microorganisms10020291. [PMID: 35208745 PMCID: PMC8877439 DOI: 10.3390/microorganisms10020291] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 01/14/2022] [Accepted: 01/25/2022] [Indexed: 11/16/2022] Open
Abstract
The transition from nature to laboratory or mass rearing can impose significant physiological and evolutionary impact on insects. The Queensland fruit fly (also known as ‘Qfly’), Bactrocera tryoni (Froggatt) (Diptera: Tephritidae), is a serious economic pest that presents major challenges for horticulture industries in Australia. The sterile insect technique (SIT) is being developed to manage outbreaks in regions that remain free of Qfly and to suppress populations in regions where this species is endemic. The biology of Qfly is intimately connected to its microbiome. Therefore, changes in the microbiome that occur through domestication have implications for SIT. There are numerous studies of the microbiome in Qfly larvae and adults, but there is little information on how the microbiome changes as Qfly laboratory colonies are established. In this study, high-throughput Illumina sequencing was used to assess the Qfly microbiome in colonies reared from wild larvae, collected from fruit, for five generations, on a gel-based larval diet. Beta diversity analysis showed that the bacterial communities from Generation 5 (G5) clustered separately from earlier generations. At the genus level, bacterial communities were significantly different between the generations and mostly altered at G5. However, communities were found similar at phyla to family taxonomic levels. We observed high abundance of Morganella and Burkholderia at the genus level in the larval and pupal stages respectively at G5, but these were not detected in earlier generations. Overall, our findings demonstrate that the domestication process strongly affects the Qfly microbiome and prompts questions about the functional relationship between the Qfly and its microbiome, as well as implications for the performance of insects that have been domesticated and mass-reared for SIT programs.
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Affiliation(s)
- Rajib Majumder
- Applied BioSciences, Macquarie University, North Ryde, NSW 2109, Australia; (P.W.T.); (T.A.C.)
- Biosecurity and Food Safety, NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute (EMAI), Menangle, NSW 2567, Australia
- Correspondence:
| | - Phillip W. Taylor
- Applied BioSciences, Macquarie University, North Ryde, NSW 2109, Australia; (P.W.T.); (T.A.C.)
| | - Toni A. Chapman
- Applied BioSciences, Macquarie University, North Ryde, NSW 2109, Australia; (P.W.T.); (T.A.C.)
- Biosecurity and Food Safety, NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute (EMAI), Menangle, NSW 2567, Australia
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Ahmed KA, Yeap HL, Pandey G, Lee SF, Taylor PW, Oakeshott JG. Population differences and domestication effects on mating and remating frequencies in Queensland fruit fly. Sci Rep 2022; 12:153. [PMID: 34997097 PMCID: PMC8741809 DOI: 10.1038/s41598-021-04198-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 12/08/2021] [Indexed: 11/30/2022] Open
Abstract
Females of many insect species are unreceptive to remating for a period following their first mating. This inhibitory effect may be mediated by either the female or her first mate, or both, and often reflects the complex interplay of reproductive strategies between the sexes. Natural variation in remating inhibition and how this phenotype responds to captive breeding are largely unexplored in insects, including many pest species. We investigated genetic variation in remating propensity in the Queensland fruit fly, Bactrocera tryoni, using strains differing in source locality and degree of domestication. We found up to threefold inherited variation between strains from different localities in the level of intra-strain remating inhibition. The level of inhibition also declined significantly during domestication, which implied the existence of genetic variation for this trait within the starting populations as well. Inter-strain mating and remating trials showed that the strain differences were mainly due to the genotypes of the female and, to a lesser extent, the second male, with little effect of the initial male genotype. Implications for our understanding of fruit fly reproductive biology and population genetics and the design of Sterile Insect Technique pest management programs are discussed.
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Affiliation(s)
- Khandaker Asif Ahmed
- Applied BioSciences, Macquarie University, Macquarie Park, NSW, 2109, Australia. .,CSIRO Land and Water, Black Mountain, ACT, 2601, Australia.
| | - Heng Lin Yeap
- CSIRO Land and Water, Black Mountain, ACT, 2601, Australia
| | - Gunjan Pandey
- CSIRO Land and Water, Black Mountain, ACT, 2601, Australia
| | - Siu Fai Lee
- Applied BioSciences, Macquarie University, Macquarie Park, NSW, 2109, Australia. .,CSIRO Land and Water, Black Mountain, ACT, 2601, Australia.
| | - Phillip W Taylor
- Applied BioSciences, Macquarie University, Macquarie Park, NSW, 2109, Australia
| | - John G Oakeshott
- Applied BioSciences, Macquarie University, Macquarie Park, NSW, 2109, Australia.,CSIRO Land and Water, Black Mountain, ACT, 2601, Australia
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