Journal ArticleDOI
Electrophysiological identification of antennal pH receptors in the ground beetle Pterostichus oblongopunctatus.
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TLDR
Electrophysiological responses of antennal taste bristles to 100 mm acetate and phosphate buffers were tested in the ground beetle Pterostichus oblongopunctatus (F.) and showed action potentials distinguished by differences in their amplitudes and polarity of spikes.Abstract:
. Electrophysiological responses of antennal taste bristles to 100 mm acetate and phosphate buffers were tested at pH 3–11 in the ground beetle Pterostichus oblongopunctatus (F.) (Coleoptera, Carabidae). Additionally, responses of these sensilla to 10 and 100 mm phosphate buffers were compared with each other. Generally, in response to these stimulating solutions, two sensory cells, classified as a salt cell (cation cell) and a pH cell, respectively, showed action potentials distinguished by differences in their amplitudes and polarity of spikes. The firing rate of the cation cell increased with increasing buffer concentration, and was influenced by buffer pH in a complicated way. The best stimulus for the second cell (pH cell) was pH of the stimulating buffer solution. As the pH of the stimulus solution increased, higher rates of firing were produced by the pH cell. For example, the number of action potentials elicited by 100 mm phosphate buffer at pH 11.1 was approximately 16-fold higher compared with that at pH 8.1, and firing rates during the first second of the response were 27.9 and 1.7 imp/s, respectively. The pH cell did not fire or fired at very low frequency (first second response below 5 imp/s) at pH 3–6. This level of acidity probably represents the pH preferences of this ground beetle in its forest habitat and hibernating sites. By contrast to the cation cell, the pH cell responded to increases in buffer concentration by decreasing its firing rate.read more
Citations
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Journal ArticleDOI
Forty years of carabid beetle research in Europe – from taxonomy, biology, ecology and population studies to bioindication, habitat assessment and conservation
D. Johan Kotze,Pietro Brandmayr,Achille Casale,Emmanuelle Dauffy-Richard,Wouter Dekoninck,Matti Koivula,Gábor L. Lövei,Dietrich Mossakowski,Jinze Noordijk,W. Paarmann,Roberto Pizzoloto,Pavel Saska,Axel Schwerk,José Serrano,Jan Szyszko,Angela Taboada Palomares,H. Turin,Stephen Venn,Rikjan Vermeulen,Tullia Zetto Brandmayr +19 more
TL;DR: A subjective summary of some of the major developments in carabidology since the 1960s, which can be useful in population studies, bioindication, conservation biology and landscape ecology.
Journal ArticleDOI
Useful model organisms, indicators, or both? Ground beetles (Coleoptera, Carabidae) reflecting environmental conditions
TL;DR: European carabids appear useful model organisms and possibly indicators because they are diverse, taxonomically and ecologically well-known, efficiently reflect biotic and abiotic conditions, are relevant at multiple spatial scales, and are easy to collect in sufficiently large numbers to allow statistical analyses.
Journal ArticleDOI
Sensing the underground – Ultrastructure and function of sensory organs in root-feeding Melolontha melolontha (Coleoptera: Scarabaeinae) larvae
TL;DR: The functional sensory units underneath the antennal pore plates are interpreted as cryptic sensilla placodea and it is suggested that these perceive a broad range of secondary plant metabolites together with CO2.
Journal ArticleDOI
Functional structure of antennal sensilla in the myrmecophilous beetle Paussus favieri (Coleoptera, Carabidae, Paussini).
TL;DR: The antennal sensilla of P. favieri are investigated by SEM, TEM and focused ion beam (FIB/SEM) technology and contrary to the hypothesis that Paussus species lack a Johston's organ, a non-connective chordotonal organ composed of 9 groups of scolopidia has been found inside the pedicel.
Journal ArticleDOI
Effects of habitat edges and trampling on the distribution of ground beetles (Coleoptera, Carabidae) in urban forests
TL;DR: In this paper, the authors studied the effects of trampling intensity and distance to the forest edge on carabid beetles in urban forests in the cities of Helsinki (Finland) and Edmonton (Canada).
References
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Journal ArticleDOI
Physiology of a primary chemoreceptor unit.
Journal Article
An inventory of taste in caterpillars: each species its own key*
L.M. Schoonhoven,J.J.A. van Loon +1 more
TL;DR: This paper reviews the results of electrophysiological and behavioural studies made on various caterpillar species during the last 40 years and concludes that caterpillar taste cells are not rigid systems, and even possess a ‘peripheral memory’.
Journal ArticleDOI
Antennal sensilla of the ground beetle Bembidion properans Steph. (Coleoptera, Carabidae).
Enno Merivee,Angela Ploomi,Märt Rahi,José Bresciani,Hans Peter Ravn,Anne Luik,Väino Sammelselg +6 more
TL;DR: The arrangement of antennal sensilla was studied in female and male ground beetles Bembidion properans Steph.
Journal ArticleDOI
Stimulation of a primary taste receptor by salts.
David R. Evans,Deforest Mellon +1 more
TL;DR: Preliminary evidence suggests that the salt receptor cell of the blowfly taste receptor has a high degree of specificity toward salts, being stimulated primarily by monovalent inorganic cations.
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