Crowded developmental environment promotes adult sex-specific nutrient consumption in a polyphagous fly

Frontiers in Zoology, Journal Year: 2019, Volume and Issue: 16(1)

Published: Feb. 18, 2019

The fitness of holometabolous insects depends largely on resources acquired at the larval stage. Larval density is an important factor modulating resource-acquisition, influencing adult survival, reproduction, and population maintenance. To date, however, our understanding how crowding affects physiology behaviour limited, little known about non-reproductive ecological traits. Here, in rearing environment polyphagous fruit fly Bactrocera tryoni ('Queensland fruit-fly') was manipulated to generate crowded uncrowded treatments. effects pupal weight, emergence, body energetic reserves, fecundity, feeding patterns, flight ability, as well predation risk were investigated.Adults from treatment had lower ability fecundity compared adults treatment. Adults greater total food consumption (i.e., yeast plus sucrose) relative weight for both sexes Furthermore, males consumed more their than treatment, while females sucrose Importantly, interaction between consumptions sex revealed that conspecifics developmental differentially females. We found no effect probability. However, significantly likely be captured by ants females.We show larvae can have implications traits a fly, including such reserve, sex-specific nutrient intake. Our findings contextualise conditions into broad framework, hence providing better significance fitness. knowledge presented here help us downstream density-dependent mass this species, with potential relevance Sterile Insect Technique.

Language: Английский

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Nongenetic paternal effects via seminal fluid

Evolution Letters, Journal Year: 2019, Volume and Issue: 3(4), P. 403 - 411

Published: July 8, 2019

Abstract Mounting evidence suggests that nongenetic paternal effects on offspring may be widespread among animal taxa, but the mechanisms underlying this form of inheritance are not yet fully understood. Here, we show seminal fluids underlie early survival in an insect, cricket Teleogryllus oceanicus, and quantify contribution effect to important fitness trait. We used castrated males within a full-sib half-sib experimental design fluid donors were responsible for variation developing embryos hatching, their subsequent adulthood. Increased expression two protein genes, previously found positively associated with sperm quality, was negatively embryo survival. These hold implications evolution adaptive maternal responses competition, more broadly interpretation sire from classic quantitative genetic breeding designs.

Language: Английский

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Physiological and Environmental Factors Affecting the Composition of the Ejaculate in Mosquitoes and Other Insects

Insects, Journal Year: 2019, Volume and Issue: 10(3), P. 74 - 74

Published: March 15, 2019

In addition to transferring sperm, male mosquitoes deliver several proteins, hormones and other factors females in their seminal fluid that inhibit remating, alter host-seeking behaviors stimulate oviposition. Recently, bioinformatics, transcriptomics proteomics have been used characterize the genes transcribed reproductive tissues individual proteins are delivered females. Thanks these foundational studies, we now understand complexity of ejaculate mosquito species. Building on this work, researchers begun identify functions various ejaculate, how they mediate effects female mosquitoes. Here, present an overview followed by a discussion under-studied aspect physiology: biotic abiotic composition ejaculate. We argue future research area would improve our understanding biology from physiological ecological perspective, may be able leverage information study key components Furthermore, work has potential control allowing us account for relevant when implementing vector strategies involving biology.

Language: Английский

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Condition‐dependent interaction between mating success and competitive fertilization success in Drosophila melanogaster*

Evolution, Journal Year: 2021, Volume and Issue: 75(8), P. 2014 - 2026

Published: April 9, 2021

Dietary restriction during development can affect adult body size and condition. In many species, larger (high-condition) males gain higher mating success through male-male competition female choice, condition the extent of both mate choice male investment in courtship or ejaculates. However, few studies have examined joint effects interplay pre- postcopulatory phases sexual selection. We therefore manipulated larval diet Drosophila melanogaster to study how variation sexes biases competitive outcomes at different reproductive stages, from paternity. did not find a difference preference latency between females conditions, nor any interaction conditions. large were more successful gaining matings, but only when direct competition, whereas latencies shorter for low-condition noncompetitive settings. Small also transferred sperm nonvirgin females, displaced proportion resident sperm, achieved paternity shares per than males. agreement with existing theory, we suggest that small might partially compensate their low by strategically investing numbers potentially other, unmeasured ejaculate traits, they do opportunity.

Language: Английский

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Cryptic male mate choice for high-quality females reduces male postcopulatory success in future matings

Evolution, Journal Year: 2023, Volume and Issue: 77(6), P. 1396 - 1407

Published: April 19, 2023

Cryptic male mate choice occurs when males differentially allocate resources to females during or after copulation. When are limited, may benefit by strategically allocating more toward higher-quality females. In the fruit fly, Drosophila melanogaster, for longer and transfer sperm seminal proteins they with larger compared smaller It is unclear, however, whether this increased investment in large has any impact on males' later matings. We mated D. melanogaster sequentially of small body size all possible combinations test cryptic costly subsequent Second matings were shorter their first matings, but there no differences fecundity between second a male. Interestingly, success at defensive competition declined his only mating had been female. This suggests that higher initial reduced postcopulatory carry underappreciated costs could limit reproductive potential.

Language: Английский

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