magistrsko delo
Gašper Šolinc (Author), Marko Kreft (Reviewer), Gregor Belušič (Mentor), Gregor Belušič (Thesis defence commission member), Aleš Škorjanc (Thesis defence commission member), Marko Kreft (Thesis defence commission member), Simona Prevorčnik (Thesis defence commission member), Aleš Škorjanc (Co-mentor)

Abstract

V magistrski nalogi smo primerjali odzive filiformnih senzil stenice Pyrrhocoris apterus na zračni tok z različnimi časovno-prostorskimi lastnostmi. Izmerili smo amplitudo, hitrost in fazo odklona čutilnega laska ter fiziološki odziv (proženje živčnih impulzov) senzil T1 in T2 pri različnih amplitudah, frekvencah in smereh sinusnega toka. Izmerili smo tudi njihov odziv na naraven dražljaj, in sicer utripanje kril muhe, ki je potencialni parazit stenic. Ugotovili smo, da je senzila T1 bistveno bolj občutljiva na sinusni tok kot T2. Različni občutljivosti omogočata širše dinamično območje celotnega sistema. Sprememba smeri toka vpliva na fazo odklona čutilnega laska ter fazo in amplitudo fiziološkega odziva senzil. Velike razlike se pojavijo med senzilami na strani vira toka in senzilami na kontralateralni strani, manjše razlike pa tudi med ipsilateralnimi senzilami. Smerna odvisnost odziva torej kljub majhnemu številu senzil omogoča grobo kodiranje smeri dražljaja. Senzile T1 in T2 se odzovejo na muho na razdalji več kot 10 cm. Odzovejo se na nizko-frekvenčne tokove in na oscilacije zračnih delcev, ki imajo frekvenco utripa kril. Slednje izzovejo pri kontralateralnih senzilah T1 sinhrono proženje živčnih impulzov s frekvenco utripa kril. Stenica P. apterus torej lahko zazna potencialne plenilce/parazite, kot je muha, in jih morda na osnovi sinhronega proženja impulzov senzil celo prepozna.

Keywords

mehanorecepcija;filiformne senzile;sinusni zračni tok;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [G. Šolinc]
UDC: 591.1(043.2)
COBISS: 4408399 Link will open in a new window
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Downloads: 478
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Other data

Secondary language: English
Secondary title: ǂThe ǂeffect of temporal and spatial properties of airflow on the response of the filiform sensilla of the bug Pyrrhocoris apterus
Secondary abstract: In this master thesis we compared the response of filiform sensilla of the firebug Pyrrhocoris apterus to airflow with different temporal and spatial properties. We measured the amplitude, speed and phase shift of the sensory hair deflection and physiological response (the firing of action potentials) of T1 and T2 sensilla at different amplitudes, frequencies and directions of sinusoidal airflow. We also measured their response to airflow produced by flapping wings of flies, which are potential heteropteran parasites. The T1 sensillum is significantly more sensitive to the sinusoidal air current than the T2 sensillum. Different sensitivity enables a wider dynamic range of the entire system. Changes in the direction of the airflow had an effect on the phase shift of the sensory hair and the phase and amplitude of the physiological response. Significant differences were observed between the sensilla on the source-side of airflow and the contralateral sensilla, minor differences were observed between the ipsilateral sensilla. The directional dependence of the response, despite the small number of sensilla, enables rough coding of stimulus direction. Both types of sensilla respond to the fly at a distance of more than 10 cm. They respond to the low-frequency currents and the oscillations of the air particles with wing beat frequency. The contralateral T1 sensilla respond to wing beat frequency with synchronous firing of action potentials. The firebug can therefore detect potential predators/parasites such as fly, and perhaps based on synchronous firing of action potentials even recognize them.
Secondary keywords: Pyrrhocoris apterus;
Type (COBISS): Master's thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. Ljubljana, Biotehniška fak.
Pages: IX, 58, [1] f.
ID: 10850504