Haemolymph of the milkweed bug Oncopeltus fasciatus (Heteroptera; lygaeidae): Inorganic constituents and amino acids

Staddon, B. W.; Everton, I.J.

doi:10.1016/0300-9629(80)90046-8

Cited by 45 publications

(22 citation statements)

References 14 publications

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“…For GC-EAD recordings, an antenna was carefully removed from an insect's head, and its base placed into the opening of a glass capillary electrode (1.0 · 0.58 · 100 mm) (A-M Systems, Inc., Carlsborg, Washington, USA) filled with saline solution (Staddon and Everton 1980). The distal end of the antenna with its tip removed by spring micro-scissors (Fine Science Tools Inc., North Vancouver, British Columbia, Canada), was inserted into the recording capillary electrode.…”

Section: Methods For Analyzing Pheromones and Behavioral Responsesmentioning

confidence: 99%

Natural selection and divergence in mate preference during speciation

2006

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Sexual isolation can evolve due to natural selection against hybrids (reinforcement). However, many different forms of hybrid dysfunction, and selective processes that do not involve hybrids, can contribute to the evolution of sexual isolation. Here we review how different selective processes affect the evolution of sexual isolation, describe approaches for distinguishing among them, and assess how they contribute to variation in sexual isolation among populations of Timema cristinae stick-insects. Pairs of allopatric populations of T. cristinae living on different host-plant species exhibit greater sexual isolation than those on the same host, indicating that some sexual isolation has evolved due to host adaptation. Sexual isolation is strongest in regions where populations on different hosts are in geographic contact, a pattern of reproductive character displacement that is indicative of reinforcement. Ecological costs to hybridization do occur but traits under ecological selection (predation) do not co-vary strongly with the probability of between-population mating such that selection on ecological traits is not predicted to produce a strong correlated evolutionary response in mate preference. Moreover, F1 hybrid egg inviability is lacking and the factors contributing to reproductive character displacement require further study. Finally, we show that sexual isolation involves, at least in part, olfactory communication. Our results illustrate how understanding of the evolution of sexual isolation can be enhanced by isolating the roles of diverse ecological and evolutionary processes.

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Section: Methods For Analyzing Pheromones and Behavioral Responsesmentioning

confidence: 99%

Natural selection and divergence in mate preference during speciation

2006

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“…Analyses employed a Hewlett Packard (HP) 5890A gas chromatograph equipped with a GC column (30 m× 0.25 mm ID) coated with DB-5 (J&W Scientific, Folsom, CA, USA) and helium as a carrier gas (35 cm s −1 ) with the following temperature program: 50°C (1 min), 20°C/min to 280°C. For GC-EAD recordings, an antenna was pulled from a live female house fly and suspended between two glass capillary electrodes (1.0 × 0.58 × 100 mm) (A-M Systems, Inc., Carlsborg, WA, USA) filled with saline solution (Staddon and Everton 1980). Mass spectra of antenna-stimulating components were obtained with a Saturn 2000 Ion Trap (Varian) fitted with a DB-5 column.…”

Section: Analyses Of Headspace Volatilesmentioning

confidence: 99%

Semiochemical-Mediated Oviposition Avoidance by Female House Flies, Musca domestica, on Animal Feces Colonized with Harmful Fungi

et al. 2010

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House flies, Musca domestica, utilize ephemeral resources such as animal feces for oviposition and development of larval offspring, but they face competition with fungi that colonize the same resource. We predicted that house flies avoid oviposition on feces well-colonized with fungi, thereby reducing fungal competition for larval offspring. Working with fungal isolates from chicken feces, we have previously shown that prior establishment of Phoma spp., Fusarium spp., or Rhizopus spp. on feces significantly reduced oviposition by house flies. Here, we report that, in the headspace volatiles of these three fungal genera, five compounds (dimethyl trisulfide, an unknown, 2-phenylethanol, citronellal, norphytone) elicit responses from house fly antennae. In behavioral bioassays, dimethyl trisulfide and 2-phenylethanol significantly reduced oviposition by house flies. We conclude that fungus-derived volatiles serve as semiochemical cues that help house flies avoid resources colonized with fungal competitors for the development of larval offspring.

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“…For electrophysiological recordings, an antenna was suspended between two glass capillary electrodes filled with a saline solution (Staddon & Everton 1980). Antennal responses were amplified using a custom-built amplifier with a passive lowpass filter and a cutoff frequency of 10 kHz.…”

Section: Experimental Insects and Laboratory Analysesmentioning

confidence: 99%