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Natal origin affects host preference and larval performance relationships in a tritrophic system

View Article: PubMed Central - PubMed

ABSTRACT

Many insects face the challenge to select oviposition sites in heterogeneous environments where biotic and abiotic factors can change over time. One way to deal with this complexity is to use sensory experiences made during developmental stages to locate similar habitats or hosts in which larval development can be maximized. While various studies have investigated oviposition preference and larval performance relationships in insects, they have largely overlooked that sensory experiences made during the larval stage can affect such relationships. We addressed this issue by determining the role of natal experience on oviposition preference and larval performance relationships in a tritrophic system consisting of Galerucella sagittariae, feeding on the two host plants Potentilla palustris and Lysimachia thyrsiflora, and its larval parasitoid Asecodes lucens. We firstly determined whether differences in host‐derived olfactory information could lead to divergent host selection, and secondly, whether host preference could result in higher larval performance based on the natal origin of the insects. Our results showed that the natal origin and the quality of the current host are both important aspects in oviposition preference and larval performance relationships. While we found a positive relationship between preference and performance for natal Lysimachia beetles, natal Potentilla larvae showed no such relationship and developed better on L. thyrsiflora. Additionally, the host selection by the parasitoid was mainly affected by the natal origin, while its performance was higher on Lysimachia larvae. With this study, we showed that the relationship between oviposition preference and larval performance depends on the interplay between the natal origin of the female and the quality of the current host. However, without incorporating the full tritrophic context of these interactions, their implication in insect fitness and potential adaptation cannot be fully understood.

No MeSH data available.


Averaged traces of the antennal response of (a) natal Potentilla (n = 5) and (b) natal Lysimachia (n = 4) females responding to volatile collections of their respective natal plant. The top trace represents the electroantennographic detection (EAD) of the Galerucella sagittariae females, and the lower trace represents the volatile compounds detected by flame ionization detection (FID) in (a) Potentilla palustris and (b) Lysimachia thyrsiflora. The dashed lines connect the peaks of the volatile compounds that caused a response in the antennae of the females of either natal origin. Summarized details of the GC‐EAD responses are shown in Table S2
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ece32826-fig-0003: Averaged traces of the antennal response of (a) natal Potentilla (n = 5) and (b) natal Lysimachia (n = 4) females responding to volatile collections of their respective natal plant. The top trace represents the electroantennographic detection (EAD) of the Galerucella sagittariae females, and the lower trace represents the volatile compounds detected by flame ionization detection (FID) in (a) Potentilla palustris and (b) Lysimachia thyrsiflora. The dashed lines connect the peaks of the volatile compounds that caused a response in the antennae of the females of either natal origin. Summarized details of the GC‐EAD responses are shown in Table S2

Mentions: The oviposition preference of G. sagittariae females of both natal origins for the two host plants, P. palustris and L. thyrsiflora, was tested in cage experiments during June and July 2015 in a controlled garden plot. Three males and three females, which had been separated for 3 days prior to the experiment, were placed in an outdoor cage (50 × 50 × 75 cm) covered with a fine mesh (0.4 mm) for 10 days. Each cage contained four host plants, with different frequencies of the two host plants (Figure 3). At the end of the experiment, the number of egg batches and the number of eggs per batch were counted to determine the oviposition preference.


Natal origin affects host preference and larval performance relationships in a tritrophic system
Averaged traces of the antennal response of (a) natal Potentilla (n = 5) and (b) natal Lysimachia (n = 4) females responding to volatile collections of their respective natal plant. The top trace represents the electroantennographic detection (EAD) of the Galerucella sagittariae females, and the lower trace represents the volatile compounds detected by flame ionization detection (FID) in (a) Potentilla palustris and (b) Lysimachia thyrsiflora. The dashed lines connect the peaks of the volatile compounds that caused a response in the antennae of the females of either natal origin. Summarized details of the GC‐EAD responses are shown in Table S2
© Copyright Policy - creativeCommonsBy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5383469&req=5

ece32826-fig-0003: Averaged traces of the antennal response of (a) natal Potentilla (n = 5) and (b) natal Lysimachia (n = 4) females responding to volatile collections of their respective natal plant. The top trace represents the electroantennographic detection (EAD) of the Galerucella sagittariae females, and the lower trace represents the volatile compounds detected by flame ionization detection (FID) in (a) Potentilla palustris and (b) Lysimachia thyrsiflora. The dashed lines connect the peaks of the volatile compounds that caused a response in the antennae of the females of either natal origin. Summarized details of the GC‐EAD responses are shown in Table S2
Mentions: The oviposition preference of G. sagittariae females of both natal origins for the two host plants, P. palustris and L. thyrsiflora, was tested in cage experiments during June and July 2015 in a controlled garden plot. Three males and three females, which had been separated for 3 days prior to the experiment, were placed in an outdoor cage (50 × 50 × 75 cm) covered with a fine mesh (0.4 mm) for 10 days. Each cage contained four host plants, with different frequencies of the two host plants (Figure 3). At the end of the experiment, the number of egg batches and the number of eggs per batch were counted to determine the oviposition preference.

View Article: PubMed Central - PubMed

ABSTRACT

Many insects face the challenge to select oviposition sites in heterogeneous environments where biotic and abiotic factors can change over time. One way to deal with this complexity is to use sensory experiences made during developmental stages to locate similar habitats or hosts in which larval development can be maximized. While various studies have investigated oviposition preference and larval performance relationships in insects, they have largely overlooked that sensory experiences made during the larval stage can affect such relationships. We addressed this issue by determining the role of natal experience on oviposition preference and larval performance relationships in a tritrophic system consisting of Galerucella sagittariae, feeding on the two host plants Potentilla palustris and Lysimachia thyrsiflora, and its larval parasitoid Asecodes lucens. We firstly determined whether differences in host‐derived olfactory information could lead to divergent host selection, and secondly, whether host preference could result in higher larval performance based on the natal origin of the insects. Our results showed that the natal origin and the quality of the current host are both important aspects in oviposition preference and larval performance relationships. While we found a positive relationship between preference and performance for natal Lysimachia beetles, natal Potentilla larvae showed no such relationship and developed better on L. thyrsiflora. Additionally, the host selection by the parasitoid was mainly affected by the natal origin, while its performance was higher on Lysimachia larvae. With this study, we showed that the relationship between oviposition preference and larval performance depends on the interplay between the natal origin of the female and the quality of the current host. However, without incorporating the full tritrophic context of these interactions, their implication in insect fitness and potential adaptation cannot be fully understood.

No MeSH data available.