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15 results for “Utetheisa”
Figure 9 in Two new species of Utetheisa Hübner (Lepidoptera, Noctuidae, Arctiinae) from the Galapagos Islands, Ecuador
Figure 9. Male genitalia of Utetheisa galapagensis (Wallengren), slide LR 192 (a), slide BL 1666 (b, c). a Whole genitalia without phallus b Phallus c Enlarged vesica.
Figure 3 in You are what you eat: native versus exotic Crotalaria species (Fabaceae) as host plants of the Ornate Bella Moth, Utetheisa ornatrix (Lepidoptera: Erebidae: Arctiinae)
Figure 3. Rates of development of Utetheisa ornatrix larvae on different species of native and exotic Crotalaria in Florida and effect of leaves versus beans in the diet (see text for details): (A) partial development of larvae on the native C. rotundifolia versus exotic C. lanceolata; (B, C) partial development of larvae on the native C. pumila versus exotic C. lanceolata; (D, E) development of larvae on the exotic C. spectabilis/retusa versus exotic C. lanceolata; (F) development of larvae on C. incana (native to U. ornatrix range in the Neotropics, but introduced to Florida) versus exotic C. lanceolata. (F – based on data from Sourakov and Locascio 2013).
Figure 4 in You are what you eat: native versus exotic Crotalaria species (Fabaceae) as host plants of the Ornate Bella Moth, Utetheisa ornatrix (Lepidoptera: Erebidae: Arctiinae)
Figure 4. Fore wing size of Utetheisa ornatrix raised on different species of native and exotic Crotalaria and effect of leaves versus beans in the diet (see text for details): (A) Fore wing size of
Figure 2 in You are what you eat: native versus exotic Crotalaria species (Fabaceae) as host plants of the Ornate Bella Moth, Utetheisa ornatrix (Lepidoptera: Erebidae: Arctiinae)
Figure 2. (A) Understorey of the Florida hammock habitat occupied with invasive exotic Crotalaria spectabilis; (B) a clearing in a secondary Florida habitat, overgrown with exotic Crotalaria pallida; (C, D) mature larvae of U. ornatrix prefer pods of C. spectabilis over leaves; (E) carpenter ants are attracted to the extrafloral nectaries of C. lanceolata; (F, G) larva of U. ornatrix on C. pumila and a pod destroyed by it; (H) mature larva of U. ornatrix inside a pod of C. incana; (I, J) pods of C. pallida are numerous and large and provide ample food and shelter for U. ornatrix; (K) empty pods of C. spectabilis in December with all of their seeds consumed by U. ornatrix larvae; (L) in December, C. retusa becomes the preferred hostplant of U. ornatrix in the C. spectabilis-dominated habitat, when the latter declines; similarly, C. pumila becomes preferred for oviposition in C. lanceolata-dominated habitat; (M) the seeds of C. retusa are well protected by thick walls of the pod; here, a third instar larva is unable to penetrate it; (N) onset of the ultimate instar; (O–Q) prepupa-to-pupa development of U. ornatrix.
Figure 1 in You are what you eat: native versus exotic Crotalaria species (Fabaceae) as host plants of the Ornate Bella Moth, Utetheisa ornatrix (Lepidoptera: Erebidae: Arctiinae)
Figure 1. (A) In the wild population of U. ornatrix, adult moth landing on the flower of exotic Crotalaria retusa, Micanopy, Florida; (B) a typical size of a moth from a wild population at Cross Creek, Florida, resulting from larval feeding on C. rotundifolia leaves (top) and its offspring raised in the laboratory on beans of C. spectabilis (bottom) (fore wing length = 20 mm); (C) a single egg batch split in two (experimental and control groups) prior to hatching; (D) hostplant preference test using mature larvae of U. ornatrix inside a tray; (E) differences in pod size and seed volume in six Crotalaria species found in Florida; (F) difference in sprouting rate under similar conditions: native Crotalaria pumila shows much slower sprouting rate than introduced invasive Crotalaria species; (G) upland pine habitat on the University of Florida campus overtaken by thousands of exotic Crotalaria lanceolata plants with a sporadic native C. pumila in the midst (October 2014); (H) U. ornatrix eggs on C. lanceolata; (I) first instar larvae; (J) third instar larva.
Utetheisa ornatrix development and defence on four Crotalaria host plants
<p>This dataset consists of data from three experiments testing how four different Crotalaria host plants affect Utetheisa ornatrix development and defence against a spider.</p> <p>The data are to be published in a paper accepted in Entomologia Experimentalis et Applicata</p>
Fig. 4 in Effect of light stress on Crotalaria spectabilis (Fabaceae) and on its herbivore insect, the moth Utetheisa ornatrix (Erebidae: Arctiinae)
Fig. 4. Weight of the pupae of Utetheisa ornatrix (L., 1758) whose larvae were raised with leaves of Crotalaria spectabilis Roth from light stressed plants and non-stressed plants. (A) male pupae; N = 30 for stressed plants and N = 18 for non-stressed plants. (B) female pupae; N = 19 for stressed plants and N = 28 for non-stressed plants. Different letters indicate statistical difference (t = -2.7531; p = 0.009).
Fig. 5 in Effect of light stress on Crotalaria spectabilis (Fabaceae) and on its herbivore insect, the moth Utetheisa ornatrix (Erebidae: Arctiinae)
Fig. 5. FecunditY of Utetheisa ornatrix (L., 1758) females whose larvae were reared on stressed and non-stressed leaves of Crotalaria spectabilis Roth. N = 18 for stressed plants and N = 15 for non-stressed plants.
Fig. 3 in Effect of light stress on Crotalaria spectabilis (Fabaceae) and on its herbivore insect, the moth Utetheisa ornatrix (Erebidae: Arctiinae)
Fig. 3. Development time of the larvae of Utetheisa ornatrix (L., 1758) reared with leaves of Crotalaria spectabilis Roth from light stressed plants and non-stressed plants. N = 49 for stressed plants and N = 46 for non-stressed plants. Different letters indicate statistical difference (t=2.27; p=0.02).
Fig. 1 in Effect of light stress on Crotalaria spectabilis (Fabaceae) and on its herbivore insect, the moth Utetheisa ornatrix (Erebidae: Arctiinae)
Fig. 1. Distribution of stressed plants (with mesh cover) and non-stressed plants of Crotalaria spectabilis Roth in the greenhouse.
Data from: Polyandrous females provide sons with more competitive sperm: support for the sexy-sperm hypothesis in the rattlebox moth (Utetheisa ornatrix)
Given the costs of multiple-mating, why has female polyandry evolved? Utetheisa ornatrix moths are well-suited for studying multiple mating in females because females are highly polyandrous over their lifespan, with each male mate transferring a substantial spermatophore with both genetic and non-genetic material. The accumulation of resources might explain the prevalence of polyandry in this species, but another, not mutually-exclusive, possibility is that females mate multiply to increase the probability that their sons will inherit more-competitive sperm. This latter "sexy-sperm" hypothesis posits that female multiple mating and male sperm competitiveness co-evolve via a Fisherian runaway process. We tested the sexy-sperm hypothesis by using competitive double matings to compare the sperm competition success of sons of polyandrous versus monandrous females. In accordance with sexy-sperm theory, we found that in 511 offspring across 17 families, the male whose polyandrous mother mated once with each of three different males sired significantly more of all total offspring (81%) than did the male whose monandrous mother was mated thrice to a single male. Interestingly, sons of polyandrous mothers had a significantly biased sex ratio of their brood toward sons, also in support of the hypothesis.
Data from: Polyandrous females provide sons with more competitive sperm: support for the sexy-sperm hypothesis in the rattlebox moth (Utetheisa ornatrix)
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Figure 5 in You are what you eat: native versus exotic Crotalaria species (Fabaceae) as host plants of the Ornate Bella Moth, Utetheisa ornatrix (Lepidoptera: Erebidae: Arctiinae)
Figure 5. Utetheisa ornatrix raised on leaves versus beans of two Crotalaria species: (A) rates of development of the last instar raised on beans versus leaves of C. lanceolata; (B) rates of larval development on beans versus leaves of C. pallida; (C) pupal weight of moths raised on beans versus leaves of C. pallida. (B and C – based on data from Ferro et al. 2006).
Data from: A free lunch? No cost for acquiring defensive plant pyrrolizidine alkaloids in a specialist arctiid moth (Utetheisa ornatrix)
Many herbivorous insects sequester defensive chemicals from their host plants. We tested sequestration fitness costs in the specialist moth Utetheisa ornatrix (Lepidoptera: Arctiidae). We added pyrrolizidine alkaloids (PAs) to an artificial diet at different concentrations. Of all the larval and adult fitness components measured, only development time was negatively affected by PA concentration. These results were repeated under stressful laboratory conditions. On the other hand, the amount of PAs sequestered greatly increased with the diet PA concentration. Absence of a detectable negative effect does not necessarily imply a lack of costs if all individuals express the biochemical machinery of detoxification and sequestration constitutively. Therefore, we used qPCR to show that expression of the gene used to detoxify PAs, pyrrolizidine-alkaloid-N-oxygenase (pno), increased 41-fold in our highest PA treatment. Nevertheless, fitness components were affected only slightly or not at all, suggesting that sequestration in this species does not incur a strong cost. The apparent lack of costs has important implications for our understanding of the evolution of ecological interactions; for example, it implies that selection by specialist herbivores may decrease the levels of certain chemical defense in plant populations.
Data from: A free lunch? No cost for acquiring defensive plant pyrrolizidine alkaloids in a specialist arctiid moth (Utetheisa ornatrix)
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