Abundance and host associations of parasitoids attacking frugivorous drosophilids on Iriomote-jima, a subtropical island of Japan

Novković, Biljana; Oikawa, Ayako; Murata, Yusuke; Mitsui, Hideyuki; Kimura, Masahito T.

doi:10.14411/eje.2012.065

Cited by 17 publications

(63 citation statements)

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“…Such parasitoid-species-specificity in resistance has been reported in a number of Drosophila species, and parasitoid-population-specificity has also been observed in some species (Dupas et al 1998(Dupas et al , 2003(Dupas et al , 2009Dubuffet et al 2007Dubuffet et al , 2009 Mitsui and Kimura 2010;Novković et al 2012; Kimura and Suwito 2014). If resistance is thus parasitoid-species-specific, host Drosophila species would be required to evolve a number of different resistance mechanisms, because they usually encounter a number of parasitoid species in nature (Mitsui and Kimura 2010;Novković et al 2012; Kimura and Suwito 2012). Indeed, D. bipectinata from Iriomote-jima is resistant against L.…”

mentioning

confidence: 79%

“…pacifica Novković & Kimura (Novković et al 2012). The low-cost nature of resistance may be important for host species to cope with a number of different parasitoid species.…”

Section: Discussionmentioning

confidence: 99%

“…This species is cold susceptible and its population in Iriomote-jima suffers high mortality in winter (Hirai et al 2000;Kimura 2004;Novković et al 2012). These things suggest that D. bipectinata has originated in the tropical regions of Asia and colonized Iriomote-jima rather recently.…”

Section: Discussionmentioning

confidence: 99%

“…The base population for the selection experiments was produced by mixing three populations of Drosophila bipectinata derived from females collected from Bogor (BG,Indonesia: 6.6 °S,106.8 °E) (Novković et al 2012). These populations were maintained on Drosophila medium under 15L: 9D (15 h light: 9 h dark) at 23°C in laboratory for a few years.…”

Section: Selection For Parasitoid Resistancementioning

confidence: 99%

“…Five replicates were prepared for each population. Novković et al 2012) and are assumed to be competitive. Methods for measurement of larval competitive ability followed Kraaijeveld and Godfray (1997).…”

Section: Measurements Of Life History and Stress Tolerance Traitsmentioning

confidence: 99%

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Assessment of fitness costs of resistance against the parasitoid Leptopilina victoriae in Drosophila bipectinata

Takigahira

Suwito

Kimura

2014

Ecological Research

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How insects evolve resistance or counter-resistance against antagonists is a basic issue in the study of host-parasitoid coevolution. One of the factors that affect their coevolution is fitness costs of resistance and counter-resistance. Here, we assess fitness costs of resistance against the parasitoid Leptopilina victoriae in Drosophila bipectinata on the basis of selection experiments. We made a base population by mixing three geographic fly populations that differed in resistance. After six generations of free mating, the base population was divided into four populations, two for selection of resistance against a L. victoriae population and two for control. Resistance increased rapidly in response to selection and reached a very high level within four generations in the two replicated selected populations, while resistance of the control populations remained low at least for 20 generations. High resistance of the selected populations was maintained at least for 10 generations even if selection was stopped. Comparison of life history and stress tolerance revealed that both selected populations had lower female longevity than the two control populations, and at least one of the selected populations had shorter thorax length and lower female desiccation tolerance and adult heat tolerance than both or either of the control populations. On the other hand, selected populations had higher male starvation tolerance and longevity than control populations.There were no significant differences in resistance against another population of L. victoriae and two other parasitoid species between the selected and control populations.These results suggest that the resistance against the L. victoriae population in D.bipectinata may incur some but not so high costs and act parasitoid-species-and/or parasitoid-population-specifically. 3 Key wordsArtificial selection • coevolution • specificity • trade-offs 4 IntroductionAll insects have immune systems to defend themselves from infection of pathogens or parasites. However, their immune systems are not always effective, because some pathogens and parasites have means to avoid being detected by the host immune systems or suppress host immune responses (Edison et al. 1981;Shelby and Webb 1999; Eleftherianos et al. 2007). To cope with such enemy's adaptations, host insects often intensify their immune responses or modify their immune systems (Strand and Pech 1995; Carton et al. 2008). One of the important factors that affect such parasitoid-host coevolution is the costs of resistance and counter-resistance (Doebeli 1997;Sasaki and Godfray 1999). A powerful tool to examine these costs is the study of correlated responses to artificial selection. Kraaijeveld and Godfray (1997) tabida compared with the control populations (Fellowes et al. 1999). Thus, the resistance mechanism of D. melanogaster has parasitoid-species-or parasitoid-population-specific components.The above selection studies were based on within-population genetic variation.Resistance and counter-resistance aga...

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confidence: 79%

“…pacifica Novković & Kimura (Novković et al 2012). The low-cost nature of resistance may be important for host species to cope with a number of different parasitoid species.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Selection For Parasitoid Resistancementioning

confidence: 99%

Section: Measurements Of Life History and Stress Tolerance Traitsmentioning

confidence: 99%

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