scholarly journals The mating rate of Drosophila suzukii reduction due to reproductive interference from Drosophila melanogaster

2020 ◽  
Author(s):  
Yongzhuo Chen ◽  
Min Zhang ◽  
Wei Hu ◽  
Jing Li ◽  
Pengcheng Liu ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Interspecific Competition ◽  
Population Size ◽  
Egg Laying ◽  
Significant Decline ◽  
Reproductive Interference ◽  
Drosophila Suzukii ◽  
Offspring Number ◽  
Successful Mating ◽  
Reproductive Activities

Abstract Background Drosophila suzukii is widely distributed. Research has revealed that the presence of Drosophila melanogaster can reduce the emergence and egg laying of D. suzukii. However, the reasons for these phenomena have not yet been reported. To investigate this issue, we sought to answer three questions: Can the presence of D. melanogaster reduce the longevity of D. suzukii? Does D. melanogaster dominate in larval interspecific competition with D. suzukii? Does reproductive interference occur between these species; i.e., do individuals of one species (e.g., D. suzukii) engage in reproductive activities with individuals of the other (e.g., D. melanogaster) such that the fitness of one or both species is reduced? Results The results showed that the adult offspring number of Drosophila suzukii was significantly reduced when this species was reared with Drosophila melanogaster. The larval interspecific competition had no significant effects on Drosophila suzukii longevity or population size. Surprisingly, Drosophila melanogaster imposed reproductive interference on males of Drosophila suzukii, which led to a significant decline in the rate of successful mating of the latter species. Conclusions The presence of Drosophila melanogaster causes the population size of Drosophila suzukii to decrease through reproductive interference, and the rate of successful mating in Drosophila suzukii is significantly reduced in the presence of Drosophila melanogaster.

scholarly journals The Drosophila Suzukii Mating Rate Decrease for the Reproductive Interference of Drosophila Melanogaster

2020 ◽  
Author(s):  
Yongzhuo Chen ◽  
Min Zhang ◽  
Wei Hu ◽  
Jing Li ◽  
Pengcheng Liu ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Interspecific Competition ◽  
Fruit Fly ◽  
Economic Loss ◽  
Egg Laying ◽  
Reproductive Interference ◽  
Drosophila Suzukii ◽  
Mating Rate ◽  
Offspring Number ◽  
Successful Mating

Abstract Background: Drosophila suzukii has been widely distributed all over the world since 2008, and it is a harmful pest causing great economic loss in many countries. Previous research has found that the presence of Drosophila melanogaster could reduce the emergence and egg laying of Drosophila suzukii. In order to figure out the potential mechanism of this phenomenon, we studied three potential factors including lifetime, larval interspecific competition, and reproductive interference. Results: The results show that the Drosophila suzukii offspring number was significantly decreased when reared with Drosophila melanogaster. The lifetime and larval interspecific competition have no significant effect on the Drosophila suzukii population. Surprisingly, Drosophila melanogaster can cause reproductive interference with male Drosophila suzukii, which leads to a significant decline in the successful mating rate of the latter fruit fly. Conclusions: The presence of Drosophila melanogaster causes the Drosophila suzukii population to decrease through the effect of reproductive interference, and the Drosophila suzukii successful mating rate is significantly decreased for the existence of Drosophila melanogaster.

scholarly journals Drosophila suzukii avoidance of microbes in oviposition choice

2021 ◽  
Vol 8 (1) ◽  
pp. 201601
Author(s):  
Airi Sato ◽  
Kentaro M. Tanaka ◽  
Joanne Y. Yew ◽  
Aya Takahashi
Keyword(s):  
Drosophila Melanogaster ◽  
Microbial Growth ◽  
Chemical Cues ◽  
Egg Laying ◽  
Site Preference ◽  
Drosophila Suzukii ◽  
Oviposition Choice ◽  
Oviposition Site Preference ◽  
Oviposition Substrate ◽  
Oviposition Sites

While the majority of Drosophila species lays eggs onto fermented fruits, females of Drosophila suzukii pierce the skin and lay eggs into ripening fruits using their serrated ovipositors. The changes of oviposition site preference must have accompanied this niche exploitation. In this study, we established an oviposition assay to investigate the effects of commensal microbes deposited by conspecific and heterospecific individuals and showed that the presence of microbes on the oviposition substrate enhances egg laying of Drosophila melanogaster and Drosophila biarmipes , but discourages that of D. suzukii . This result suggests that a drastic change has taken place in the lineage leading to D. suzukii in how females respond to chemical cues produced by microbes. We also found that hardness of the substrate, resembling that of either ripening or damaged and fermenting fruits, affects the response to microbial growth, indicating that mechanosensory stimuli interact with chemosensory-guided decisions to select or avoid oviposition sites.

scholarly journals MEASUREMENT OF FITNESS AND ITS COMPONENTS IN SIX LABORATORY STRAINS OF DROSOPHILA MELANOGASTER

Genetics ◽  
1984 ◽  
Vol 108 (1) ◽  
pp. 201-211
Author(s):  
Tsuneyuki Yamazaki
Keyword(s):  
Drosophila Melanogaster ◽  
Interspecific Competition ◽  
Population Size ◽  
Competitive Ability ◽  
Single Species ◽  
Phenotypic Correlation ◽  
Genotypic Correlation ◽  
The Real ◽  
Fitness Measures ◽  
Very High

ABSTRACT Six laboratory strains of Drosophila melanogaster were used to measure "net fitness" and its components by interspecific competition with D. hydei using 100 experimental populations. The "total competitive ability," an estimate of net fitness measured in these competition experiments, was tightly correlated with another measure of net fitness, the population size, in single-species experiments (phenotypic correlation rp = 0.675 and genotypic correlation rg = 0.997). Other components of fitness were also measured simultaneously, and the correlation with the net fitness was calculated. The very high correlation between two measurements of net fitness and lower correlations between net fitness and components of fitness suggests that these net fitness measures are more reliable estimates of the "real net fitness" than the components of fitness.

Environmental sensitivity and heterosis for egg laying in Drosophila melanogaster

1989 ◽  
Vol 78 (2) ◽  
pp. 243-248 ◽  
Author(s):  
E. Santiago ◽  
A. Dom�nguez ◽  
J. Albornoz ◽  
R. Pi�eiro ◽  
J. I. Izquierdo
Keyword(s):  
Drosophila Melanogaster ◽  
Egg Laying ◽  
Environmental Sensitivity

scholarly journals Social modulation of oogenesis and egg-laying in Drosophila melanogaster

2021 ◽  
Author(s):  
Bailly Tiphaine ◽  
Philip Kohlmeier ◽  
Rampal Etienne ◽  
Bregje Wertheim ◽  
Jean-Christophe Billeter
Keyword(s):  
Drosophila Melanogaster ◽  
Social Context ◽  
Social Systems ◽  
Fruit Fly ◽  
Egg Laying ◽  
Physiological Adaptation ◽  
Group Members ◽  
Selection For ◽  
Underlying Mechanisms ◽  
Gravid Females

Being part of a group facilitates cooperation between group members, but also creates competition for limited resources. This conundrum is problematic for gravid females who benefit from being in a group, but whose future offspring may struggle for access to nutrition in larger groups. Females should thus modulate their reproductive output depending on their social context. Although social-context dependent modulation of reproduction is documented in a broad range of species, its underlying mechanisms and functions are poorly understood. In the fruit fly Drosophila melanogaster, females actively attract conspecifics to lay eggs on the same resources, generating groups in which individuals may cooperate or compete. The tractability of the genetics of this species allows dissecting the mechanisms underlying physiological adaptation to their social context. Here, we show that females produce eggs increasingly faster as group size increases. By laying eggs faster in group than alone, females appear to reduce competition between offspring and increase their likelihood of survival. In addition, females in a group lay their eggs during the light phase of the day, while isolated females lay them during the night. We show that responses to the presence of others are determined by vision through the motion detection pathway and that flies from any sex, mating status or species can trigger these responses. The mechanisms of this modulation of egg-laying by group is connected to a lifting of the inhibition of light on oogenesis and egg-laying by stimulating hormonal pathways involving juvenile hormone. Because modulation of reproduction by social context is a hallmark of animals with higher levels of sociality, our findings represent a protosocial mechanism in a species considered solitary that may have been the target of selection for the evolution of more complex social systems.

scholarly journals Investigating three sources of bias in hook-and-line surveys: survey design, gear saturation, and multispecies interactions

2019 ◽  
Vol 76 (2) ◽  
pp. 192-207
Author(s):  
Peter T. Kuriyama ◽  
Trevor A. Branch ◽  
Allan C. Hicks ◽  
John H. Harms ◽  
Owen S. Hamel
Keyword(s):  
Interspecific Competition ◽  
Population Size ◽  
Relative Error ◽  
Statistical Power ◽  
Survey Design ◽  
Biological Information ◽  
Catch Per Unit Effort ◽  
Absolute Relative Error ◽  
Survey Results ◽  
Survey Methodologies

Hook-and-line surveys can be used to estimate population trends in fish species where conventional methods such as trawl, acoustic, visual, or pot surveys cannot be applied. Hook-and-line surveys allow for the collection of biological information, but the resultant indices of abundance may be biased. We designed simulations to address concerns around survey design, hook saturation, and competition among species and found that catch per unit effort (CPUE) declined more slowly than population size across all scenarios. This hyperstability was most prominent when fish were found in high-density patches, and these scenarios have median absolute relative error values roughly three to five times greater than those with more even distributions of fish density. Despite hyperstability, the surveys still had statistical power to detect changes in abundance. Interspecific competition for hooks caused bias in survey results when one species was more aggressive than another. Taken together, our results indicate hook-and-line surveys fill a niche in survey methodologies, but their use and interpretation can be challenged by hyperstability and competition among species.

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