Larval competition differentially affects arbovirus infection in Aedes mosquitoes

被引:142
作者
Alto, BW
Lounibos, LP
Higgs, S
Juliano, SA
机构
[1] Univ Florida, Florida Med Entomol Lab, Vero Beach, FL 32962 USA
[2] Univ Texas, Med Branch, Dept Pathol, Ctr Biodef & Emerging Infect Dis, Galveston, TX 77555 USA
[3] Illinois State Univ, Dept Biol Sci, Behav Ecol Evolut & Systemat Sect, Normal, IL 61790 USA
关键词
Aedes aegypti; Aedes albopictus; arborvirus model system; indirect effects; mosquitoes; Sindbis virus (SINV); susceptibility to infection; trait-mediated effects;
D O I
10.1890/05-0209
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Both density-mediated and trait-mediated indirect biotic interactions may be important in structuring communities. Indirect interactions in many study systems remain unexplored; in part, because they are often difficult to detect, and in many instances, have been identified empirically only when unexpected results arise. Indirect effects induced by competition may be particularly important among organisms with complex life cycles, wherein competitive effects experienced in one life stage influence species interactions in one or more subsequent stages. We determined whether species-specific effects of larval competition in the mosquitoes Aedes albopictus and Aedes aegypti have indirect effects at the adult stage, specifically testing for effects on arboviral infection with Sindbis virus (SINV). For A. albopictus, but not for A. aegypti, competition resulted in greater infection, body titer, and dissemination rates compared to low-competition conditions. Whole body titers of virus increased with adult size irrespective of competition. However, between competitive treatments, mosquitoes from low-competition conditions had greater mean size, with lower infection rates and lower whole body titers than the smaller mosquitoes from high-competition conditions. These results suggest that larval competition, common in natural mosquito populations, has important indirect effects on adults by altering mosquito-virus interactions. Such indirect effects may change transmission parameters of pathogens.
引用
收藏
页码:3279 / 3288
页数:10
相关论文
共 58 条
[2]  
Altwegg R, 2002, EVOL ECOL RES, V4, P519
[3]   Competition and resistance to starvation in larvae of container-inhabiting Aedes mosquitoes [J].
Barrera, R .
ECOLOGICAL ENTOMOLOGY, 1996, 21 (02) :117-127
[4]  
BLACK WC, 1989, J MED ENTOMOL, V32, P847
[5]  
Braks MAH, 2004, ANN ENTOMOL SOC AM, V97, P130, DOI 10.1603/0013-8746(2004)097[0130:ICBTIS]2.0.CO
[6]  
2
[7]   METABOLIC RELATIONSHIP BETWEEN FEMALE BODY SIZE, RESERVES, AND FECUNDITY OF AEDES-AEGYPTI [J].
BRIEGEL, H .
JOURNAL OF INSECT PHYSIOLOGY, 1990, 36 (03) :165-172
[8]  
BUTLER JF, 1984, ACAROLOGY, V6, P1075
[9]  
Christophers S.R., 1960, Aedes aegypti (L.) the yellow fever mosquito: its life history
[10]   LABORATORY TRANSMISSION OF SINDBIS-VIRUS BY AEDES-ALBOPICTUS, AEDES-AEGYPTI, AND CULEX-PIPIENS (DIPTERA, CULICIDAE) [J].
DOHM, DJ ;
LOGAN, TM ;
BARTH, JF ;
TURELL, MJ .
JOURNAL OF MEDICAL ENTOMOLOGY, 1995, 32 (06) :818-821