Feeding rates of the gynogenetic Amazon molly Poecilia formosa and one of its sexual hosts, the sailfin molly Poecilia latipinna, were measured under winter and summer temperature conditions. Food consumption of the unisexual P. formosa in winter conditions was significantly higher than that of P. latipinna, and it is hypothesized that the resulting food stress might have an important influence...

In a microchromosome-carrying laboratory stock of the normally all-female Amazon molly Poecilia formosa triploid individuals were obtained, all of which spontaneously developed into males. A comparison of morphology of the external and internal insemination apparatus and the gonads, sperm ploidy and behaviour, to laboratory-bred F(1) hybrids revealed that the triploid P. formosa males, though p...

The sweetpotato whitefly Bemisia tabaci (Gennadius) is one of the most invasive pest species worldwide. Q and B biotypes are the two most devastating species within the B. tabaci complex. Bemisia tabaci can vector hundreds of plant viruses that seriously threaten crop production. Endoparasitoid, Encarsia formosa Gahan, is widely used to control whiteflies, however, little is known about the eff...

Department of Automation Engineering, National Formosa University Huwei, Yunlin, Taiwan, (Email: [email protected]) *Department of Electrical Engineering, National Winlin University of Science and Technology Douliou, Yunlin, Taiwan **Institute of Electro-Optical and Material Science, National Formosa University Huwei,Yunlin, Taiwan ***Institute of Mechanical Engineering, National Cheng Kung Uni...

Gynogenesis is a peculiar mode of clonal reproduction in which eggs need to be pseudo-fertilized by sperm, but the male genes are not passed on to the offspring. One mating system in which gynogenesis is found involves a unisexual hybrid, the Amazon molly (Poecilia formosa), which typically uses males of its two parental species as sperm donors. Most gynogenetic lineages do not sexually parasit...

INT~ODUCTION ................................................................... Hypothesis of heterogametism ..................................................... Equivalence, within strain C, of pollen of Oenothera pratincola f. typica and mut. latifolia. . The Fa and F, generations of the cross mut. formosa from strain E X mut. latifolia from strainc ............................................

Endoparasitic Hymenoptera vary in the extent to which they provision their eggs and thus in the degree to which they appear to rely on their hosts for resources during embryonic development. In this study, developmental rates were examined in two congeneric parasitoid species, Encarsia formosa and E. pergandiella, that provision their eggs to different degrees. E. formosa eggs are much larger t...

Plum is a globally grown stone fruit and can be divided into several species. In particular, the Prunus salicina, which is native to China, is widely grown in many fruit orchards in Korea and Japan, as well as the United States and Australia. The transcriptome data for Prunus salicina has not been reported to our knowledge. In this study, we performed de novo transcriptome assembly for two sele...

Parasitoids of the Encarsia genus (Hymenoptera: Aphelinidae) are important biological control agents against whiteflies. Some of the species in this genus not only parasitize their hosts, but also kill them through host feeding. The whitefly parasitoid, Encarsia formosa Gahan, was examined to determine whether the rearing host species affects its subsequent host-feeding capacity and parasitism....