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  • Blattella germanica  (1)
  • Blattellidae  (1)
  • Giant neurons  (1)
Document type
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Years
  • 1
    Electronic Resource
    Electronic Resource
    The giant fiber system in the forelegs (whips) of the whip spider Heterophrynus elaphus Pocock (Arachnida: Amblypygi) (1991)
    Springer
    Journal of comparative physiology 168 (1991), S. 63-73 
    Details
    ISSN: 1432-1351
    Keywords: Giant fibers ; Giant neurons ; Mechanoreceptors ; Whip spider
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The front legs of the whip spider H. elaphus are strongly modified to serve sensory functions. They contain several afferent nerve fibers which are so large that their action potentials can be recorded externally through the cuticle. In recordings from the tarsus 7 different types of afferent spikes were identified; 6 additional types of afferent spikes were discriminated in recordings from the tibia and femur. Most of the recorded potentials could be attributed to identifiable neurons serving different functions. These neurons include giant interneurons and giant fibers from diverse mechanoreceptors such as slit sense organs, trichobothria, and a joint receptor. In the present report these neurons are characterized using electrophysiological and histological methods. Their functions are discussed in the context of the animal's behavior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00217104
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Aggregation Agents in German Cockroach Blattella germanica: Examination of Efficacy (1999)
    Springer
    Journal of chemical ecology 25 (1999), S. 1105-1119 
    Details
    ISSN: 1573-1561
    Keywords: Dictyoptera ; Blattellidae ; Blattella germanica ; German cockroach ; aggregation ; pheromone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Aggregation behavior and reduced locomotory activity in the German cockroach is known to be caused by chemical compounds in the feces. The attractive and/or arrestant efficacy of three relevant substances was tested in first instars by a two-choice aggregation test and in adults with a locomotion compensator apparatus that allows quantification of taste-directed orientation and walking speed as a function of antennal stimulation. The three substances tested were a feces crude extract; a mixture of six carboxylic acids (mix G) out of a total of 29 that were identified in the feces extract and tested as single compounds and in various combinations; and a steroid glucoside denoted as blattellastanoside A, which has been suggested as an aggregation arrestant pheromone in Blattella germanica. With both of our test methods, feces extract and mix G proved to be very attractive, whereas the effects of blattellastanoside A were, if anything, very poor. Possible reasons for discrepancies are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1020885926578
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    Paper (German National Licenses)
    Fulltext
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