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17 results for “Wasmannia auropunctata”
Fig. 4 in Palatability of baits containing (S)-methoprene to Wasmannia auropunctata (Hymenoptera: Formicidae)
Fig. 4. Effects of addition of 0.25% (S)-methoprene and increase in attractiveness of (S)-methoprene baits by the addition of an adjuvant as a masking agent. Treatments with different letters are significantly different (Pp <0.05).
Fig. 1 in Palatability of baits containing (S)-methoprene to Wasmannia auropunctata (Hymenoptera: Formicidae)
Fig. 1. Non-linear regression curve showing the relationship between ant recruitment and proportion of (S)-methoprene in the Hawaii Ant Lab's novel gel bait.
Fig. 2 in Palatability of baits containing (S)-methoprene to Wasmannia auropunctata (Hymenoptera: Formicidae)
Fig. 2. Mean recruitment of ants to baits containing different concentrations of (S)-methoprene. Treatments with different letters are significantly different (P <0.05).
Figure 1 in The History of Little Fire Ant Wasmannia auropunctata Roger in the Hawaiian Islands: Spread, Control, and Local Eradication
Figure 1. Number of known locations infested with Wasmannia auropunctata on Hawaii island between 1999 and 2007. Data sourced from Conant and Hirayama (2000); Motoki et al. (Motoki et al. 2013), P. Conant (pers. com.) and informal reports from Hawaii Department of Agriculture.
Figure 4 in The History of Little Fire Ant Wasmannia auropunctata Roger in the Hawaiian Islands: Spread, Control, and Local Eradication
Figure 4. Map of Kauai showing location infested by Wasmannia auropuntata (2012). Currently this site is putatively ant free.
Figure 2 in The History of Little Fire Ant Wasmannia auropunctata Roger in the Hawaiian Islands: Spread, Control, and Local Eradication
Figure 2. Location of properties infested with Wasmannia auropunctata in January 2007 prepared by Hawaii Department of Agriculture.
Figure 6 in The History of Little Fire Ant Wasmannia auropunctata Roger in the Hawaiian Islands: Spread, Control, and Local Eradication
Figure 6. Locations of known sites on Oahu infested with Wasmannia auropunctata. (currently the infestation in Mililani and the original infestation in Waimanalo are putatively ant-free)
Figure 1 in Little Fire Ant, Wasmannia auropunctata (Roger) (Hymenoptera: Formicidae), Established at Several Locations on Guam
Figure 1. Map collection sites (after Burdick 2006) of W. auropunctata on Guam: (a) Primo Northern Wasteland, Yigo (N 13.5411, E 13.5411); (b) Nimitz Hill, Piti (N 13.4612, E 144.7080); (c) Pigua, Merizo (N 13.2648, E 144.6719);(d) Santa Rita (N 13.3919, E 144.6671); (e) Going to Veteran's Park, Umatac (N 13.3037, E 144.6742); (f) Matgue River, Piti (N 13.4685, E 144.7078); (g) Nimitz Hill, Piti (N 13.4641, E 144.7039).
Fig. 1 in The effects of laboratory rearing diet on recruitment behavior of Wasmannia auropunctata (Hymenoptera: Formicidaea)
Fig. 1. Mean ± SE difference in recruitment rates of laboratory raised Wasmannia auropunctata to non-toxic baits: Hawaii Ant Lab gel bait, 50% gelled sucrose solution, and tuna between pre- and post-treatment measurements of the multi-choice laboratory experiment (n = 5 colonies). Bars in each group with different letters above have statistically different means (P <0.05). Colonies were exposed to their respective dietary treatment (buffet plus crickets: n=5, vegetable oil wick plus crickets: n=5, 25% sucrose solution plus crickets: n=5, and pureed tuna plus crickets: n=5) for 49 d. Means represented in this chart are based on raw data for visualization and are not the reported marginal means.
Fig. 2 in The effects of laboratory rearing diet on recruitment behavior of Wasmannia auropunctata (Hymenoptera: Formicidaea)
Fig. 2. Recruitment rates (mean number of ants ± SE) of wild Wasmannia auropunctata to the Hawaii Ant Lab gel bait, 50% gelled sucrose solution, and tuna for multi-choice (n = 6 per treatment) and no-choice (n = 6 per treatment) field experiments. Bars within clusters with different letters above have statistically different means (P <0.05). Means represented in this chart are based on raw data for visualization and not proportional results from the Poisson distributed generalized linear mixed model as reported.
Figure 5 in The History of Little Fire Ant Wasmannia auropunctata Roger in the Hawaiian Islands: Spread, Control, and Local Eradication
Figure 5. Locations of all known sites on Maui infested with Wasmannia auropunctata.
Data from: "Worker queens"? Behavioral flexibility, juvenile hormone binding protein and Vitellogenin in queens of the little fire ant Wasmannia auropunctata
<p>Many species of social Hymenoptera demonstrate behavioral flexibility, where older workers that typically forage can revert to younger worker tasks, such as nursing, when these are absent. This flexibility is typical of the sterile worker class, yet rare in queens. In the little fire ant (<i>Wasmannia auropunctata</i>) queens have been reported to perform only egg laying. We examined behavior of queens of <i>W. auropunctata</i> after demographic manipulation. When half of the workers were removed from the colony, queens were observed caring for eggs, larvae and pupae as well as eating outside of the nest, like forager workers. We examined the relationship between these atypical queen behaviors and their juvenile hormone binding protein (JHbp) and vitellogenin (Vg) expression via QRT-PCR method. JHbp and Vg expression decreased when queens were performing worker tasks, resembling the expected expression pattern of typical sterile workers. Flexibility in queen behaviors in the little fire ant may be an important adaptation to changing environments. As a significant invasive species, such adaptation may increase the probability of colony survival during propagation. Our results not only present new insights in behavioral flexibility in social insects, but also increases our understanding of the success of this significant invasive species. </p>
Data from: Androgenesis is a maternal trait in the invasive ant Wasmannia auropunctata
Androgenesis is the production of an offspring containing exclusively the nuclear genome of the fathering male, via the maternal eggs. This unusual mating system is generally considered as a male trait, giving to androgenetic males a substantial fitness advantage over their sexually reproducing relatives. We here provide the first empirical study of the evolutionary outcomes of androgenesis in a haplo-diploid organism: the invasive ant Wasmannia auropunctata. Some of the populations of this species have a classical haplo-diploid sexual mating system. In other populations, females and males are produced through parthenogenesis and androgenesis, respectively, whereas workers are produced sexually. We conducted laboratory reciprocal-cross experiments with reproductive individuals from both types of populations and analyzed their progenies with genetic markers, to determine the respective contribution of males and females on the production of androgenetic males. We found that androgenesis was a parthenogenetic female trait. A population genetic study conducted in natura confirmed the parthenogenetic female origin of androgenesis, with the identification of introgression events of sexual male genotypes into androgenetic/parthenogenetic lineages. We argue that by producing males via androgenesis, parthenogenetic queen lineages may increase and/or maintain their adaptive potential, whilst maintaining the integrity of their own genome, by occasionally acquiring new male genetic material and avoiding inbreeding depression within the sexually produced worker cast.
Fig. 3 in Palatability of baits containing (S)-methoprene to Wasmannia auropunctata (Hymenoptera: Formicidae)
Fig. 3. Differences between all baits with and without (S)-methoprene as well as all baits with and without the adjuvant. Treatments with different letters are significantly different (P <0.05).
Figure 3 in The History of Little Fire Ant Wasmannia auropunctata Roger in the Hawaiian Islands: Spread, Control, and Local Eradication
Figure 3. Areas of Hawaii island currently infested with Wasmannia auropunctata (2016). (Not all properties in the larger shaded section are infested).
Data from: Androgenesis is a maternal trait in the invasive ant Wasmannia auropunctata
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Data from: “Worker queens”? Behavioral flexibility, juvenile hormone binding protein and Vitellogenin in queens of the little fire ant Wasmannia auropunctata
Open the record for dataset details and reuse information.
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