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10 results for “oviposition site choice”
Fig. 4 in Lady beetle oviposition site choices: maternal effects on offspring performance
Fig. 4. Chroma (carotenoids) of Cycloneda sanguinea (A) and Hippodamia convergens (B) adults that developed with the Uroleucon (grey) and Brevicoryne (black) diets during the immature stages as a function of the mean brightness. Females are indicated with triangles and males with crosses. The dashed ellipse highlights the difference in mean brightness of Cycloneda sanguinea adults for each diet.
Fig. 2 in Lady beetle oviposition site choices: maternal effects on offspring performance
Fig. 2. Individual adult weight (mg) for Cycloneda sanguinea, Hippodamia convergens, and Harmonia axyridis that emerged afer the Uroleucon (grey) and Brevicoryne (black) larvae diets as a function of development time (d). Females are indicated with triangles and males with crosses. The dashed line indicates the weight difference of Cycloneda sanguinea in each diet.
Fig. 1 in Lady beetle oviposition site choices: maternal effects on offspring performance
Fig. 1. Survival curves as a function of time for Harmonia axyridis (A) and Cycloneda sanguinea (B) immatures fed with aphids Brevicoryne (white) or Uroleucon (grey). Straight lines demarcate the average periods for instars (first to fourth in Roman numerals) and pupae.
Fig. 3 in Lady beetle oviposition site choices: maternal effects on offspring performance
Fig. 3. Reflectance spectrum for the elytra of Cycloneda sanguinea (n = 33) (A) and Hippodamia convergens (n = 18) (B) adults when fed with Uroleucon or Brevicoryne aphids during the immature stages. Each curve represents the average of 6 spectral measures (3 in each elytra) performed for each individual.
Fig. 5 in Lady beetle oviposition site choices: maternal effects on offspring performance
Fig. 5. PCA graph performed for the following variables: development time (time), brightness, weight, and chroma derived from carotenoids, with the position of Hippodamia convergens (A) and Cycloneda sanguinea (B) adults which have emerged from the Uroleucon (grey) and Brevicoryne (black) diet during the immature stages, when sorted in function of the 2 main axes of data variation.
On the use of private versus social information in oviposition site choice decisions by Drosophila melanogaster females
<p>Individuals are faced with decisions throughout their lifetimes, and the choices they make often have important consequences towards their fitness. Being able to discern which available option is best to pursue often incurs sampling costs, which may be largely avoided by copying the behaviour and decisions of others. Although social learning and copying behaviours are widespread, much remains unknown about how effective and adaptive copying behaviour is, as well as the factors that underlie its expression. Recently, it has been suggested that since female fruit flies (<i>Drosophila melanogaster</i>) appear to rely heavily on public information when selecting oviposition sites, they are a promising model system for researching patch-choice copying, and more generally, the mechanisms that control decision-making. Here, we set out to determine how well female distinguish between socially-produced cues, and whether females are using 'relevant' signals when choosing an oviposition site. We found that females showed a strong preference for ovipositing on media patches that had been previously occupied by ovipositing females of the same species and diet over other female outgroups. However, in a separate assay, we observed that females favoured ovipositing on media patches that previously housed virgin males over those exhibiting alternative conspecific signals. Our results confirm that females use cues left behind by other flies when choosing between potential oviposition sites, though their prioritization of these signals raises serious questions as to whether fruit flies are employing copying behaviour, or are instead responding to signals that may not be of relevance to oviposition site suitability.</p>
On the use of private versus social information in oviposition site choice decisions by Drosophila melanogaster females
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Data from: Oviposition site choice under conflicting risks demonstrates that aquatic predators drive terrestrial egg-laying
Laying eggs out of water was crucial to the transition to land and has evolved repeatedly in multiple animal phyla. However, testing hypotheses about this transition has been difficult because extant species only breed in one environment. The pantless treefrog, Dendropsophus ebraccatus, makes such tests possible because they lay both aquatic and arboreal eggs. Here, we test the oviposition site choices of D. ebraccatus under conflicting risks of arboreal egg desiccation and aquatic egg predation, thereby estimating the relative importance of each selective agent on reproduction. We also measured discrimination between habitats with and without predators and development of naturally laid aquatic and arboreal eggs. Aquatic embryos in nature developed faster than arboreal embryos, implying no cost to aquatic egg laying. In choice tests, D. ebraccatus avoided habitats with fish, showing that they can detect aquatic egg predators. Most importantly, D. ebraccatus laid most eggs in the water when faced with only desiccation risk, but switched to laying eggs arboreally when desiccation risk and aquatic predators were both present. This provides the first experimental evidence to our knowledge that aquatic predation risk influences non-aquatic oviposition and strongly supports the hypothesis that it was a driver of the evolution of terrestrial reproduction.
Data from: Oviposition site choice under conflicting risks demonstrates that aquatic predators drive terrestrial egg-laying
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Data from: Predator specific responses and emergent multi-predator effects on oviposition site choice in gray treefrogs, Hyla chrysoscelis
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