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  • 1
    Electronic Resource
    Electronic Resource
    Intensity and spectral emission as factors affecting the efficacy of an insect electrocutor trap towards the house-fly (1992)
    Springer
    Entomologia experimentalis et applicata 64 (1992), S. 259-268 
    Details
    ISSN: 1570-7458
    Keywords: Musca domestica ; electrocutor traps ; intensity ; colour ; spectral emission ; insect ligh responses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Competitive tests were used to determine how the quantitative and spectral characteristics of an electrocutor trap light source affected the attraction of the house-fly, Musca domestica L. It was found that an increase in the radiant flux (Fe) of the trap lamps due to an increase in radiant area (A), caused a much larger increase in catch than if radiant flux was increased through higher radiant emittance (Mc). The results from electroretinograms recorded in response to different levels of Me were consistent with the idea that at a given wavelength the attractiveness of a lamp is attributable to the quantitative output perceived by the fly. Of nine fluorescent lamps, the most attractive had peak emission at 340 nm. A blue lamp (peak emission 419 nm) attracted less than a third as many flies as the UV emitting lamps, and a white lamp (peak emission 585 nm) attracted fewer than a quarter as many. The corresponding photoreceptor responses were measured using the electroretinogram. At wavelengths above 400 nm the attractiveness of a lamp to a fly appears to be lower relatively than the photoreceptor response. Within the ultraviolet region (300 nm–400 nm) attractiveness is again attributable to the quantitative output perceived by the fly. It is concluded that there is a genuine behavioural preference for lamp emissions in the ultraviolet region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00341089
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The projection of ocellar neurons within the brain of the Locust, Schistocerca gregaria (1975)
    Springer
    Cell & tissue research 157 (1975), S. 467-492 
    Details
    ISSN: 1432-0878
    Keywords: Ocelli ; Locust ; Insect central nervous system ; Cobalt iontophoresis ; Neuroanatomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Cobalt iontophoresis of the median and lateral ocellar nerves of Schistocerca gregaria, combined with silver impregnated sections of the brain, has demonstrated the projection areas of the large and medium-sized ocellar afferent neurons. These neurons terminate within the brain and their cell bodies lie within the protocerebrum. Ocellar neurons project to two discrete areas on each side of the brain, each area receiving input from a different set of fibres. Both postero-dorsal complexes receive an input from two large ipsilateral and two large median fibres. Their dendritic fields maintain an ordered spatial array relative to one another. The two antero-lateral complexes receive an input from one large ipsilateral fibre and medium-sized ipsilateral and median small-field afferent fibres. Each lateral ocellus has two large fibres in common with the median ocellus. These lateromedial fibres receive photoreceptor input from both ocelli but form no major arborisations within the brain. The lateral ocellar tracts appear to form a third ocellar association area since higher-order neurons branch amongst the lateral and latero-medial fibres within the tract. The axons of the higher-order neurons descend to the ventral cord via the circum-oesophageal commissures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222600
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    Paper (German National Licenses)
    Fulltext
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