The imaginal ecdysis of the desert locust, <i>Schistocerca gregaria.</i>

Hughes, T. D.

doi:10.1111/j.1365-3032.1980.tb00211.x

Cited by 32 publications

(1 citation statement)

References 24 publications

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“…Observation of ecdysis is additionally facilitated by the fact that it is performed at predictable developmental time points and locomotion is usually limited, in part due to the need to re-form musculo-skeletal attachments. These advantages have enabled not only close behavioural observation but also highly precise measurements of single muscle activity by both classical electrophysiological and modern imaging methods [77,89,90]. Increasingly, genetic methods of physiological manipulation are also being recruited to analyse the neural circuitry and neuromodulatory control of ecdysis [78,91,92].…”

Section: Experimental Advantages Of Ecdysis As a Model For Behavioura...mentioning

confidence: 99%

Neuromodulation and the toolkit for behavioural evolution: can ecdysis shed light on an old problem?

et al. 2022

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The geneticist Thomas Dobzhansky famously declared: ’Nothing in biology makes sense except in the light of evolution’. A key evolutionary adaptation of Metazoa is directed movement, which has been elaborated into a spectacularly varied number of behaviours in animal clades. The mechanisms by which animal behaviours have evolved, however, remain unresolved. This is due, in part, to the indirect control of behaviour by the genome, which provides the components for both building and operating the brain circuits that generate behaviour. These brain circuits are adapted to respond flexibly to environmental contingencies and physiological needs and can change as a function of experience. The resulting plasticity of behavioural expression makes it difficult to characterize homologous elements of behaviour and to track their evolution. Here, we evaluate progress in identifying the genetic substrates of behavioural evolution and suggest that examining adaptive changes in neuromodulatory signalling may be a particularly productive focus for future studies. We propose that the behavioural sequences used by ecdysozoans to moult are an attractive model for studying the role of neuromodulation in behavioural evolution.

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Section: Experimental Advantages Of Ecdysis As a Model For Behavioura...mentioning

confidence: 99%

Neuromodulation and the toolkit for behavioural evolution: can ecdysis shed light on an old problem?

et al. 2022

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Neuromuscular and hormonal control of post‐eclosion processes in flies

Fraenkel

Žďárek

1984

Arch Insect Biochem Physiol

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Entomology, Czechoslovak Academy of Sciences, Prague (1. Z.)Flies (exemplified by Sarcophaga bullata) expand after eclosion from the puparium by processes of "pulsing" (slow rhythmical abdominal contractions) and "pumping" of air (fast rhythmical contractions of the cibarial pump). Pulsing and pumping are inhibited if a newly eclosed fly is kept in an enclosed space (sand, a glass tube, an empty puparium). This inhibition no longer applies if such flies are injected with either hemolymph from flies 10-15 min old or CAMP, or are confined at the age of 10 min. This suggests a hormonal control of pulsing and pumping. Pumping alone, without pulsing, occurs in flies treated with certain paralyzing agents like ether, tetrodotoxin, bee venom, or "FlyNap," or have the connectives in the neck cut or interrupted by cauterization. Application of FlyNap or neck cauterization leads to excessive pumping which results in bloating. Expansion by bloating is confined to the soft membranes, leaving sclerites and wings largely unexpanded. The function of pulsing is probably that of "plasticizing" and stretching the cuticle to make it respond to increased steady pressure by airpumping. Flies ligated at the proboscis show almost regular pulsing and pumping, but without intake of air, and consequently no expansion.Cuticle (sclerites) and wings, however, become plasticized. Some plasticization occurs even in the absence, or reduction, of pulsing (in a neck-cauterized fly), brought about by a hormonal process. Eclosion from the puparium is also initiated by a hormonal action. Thus, the following processes during fly emergence are controlled by hormones: eclosion proper, pulsing, pumping, plasticization, and tanning. These hormones are separate entities, with the possible exception of the pulsing/pumping horrnone(s).

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Invertebrate Respiratory Systems

Mill

1997

Comprehensive Physiology

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The sections in this article are: Terrestrial and Aquatic Environments Interstitial Environments: Burrows and Tubes External Gills Annelida Mollusca Arthropoda Echinodermata Respiratory Currents Annelida Mollusca Arthropoda Echinodermata Respiratory Chambers Annelida Mollusca Arthropoda Echinodermata Open Tracheal Systems Ventilatory Pumping Movements Spiracular Movements Autoventilation Morphology of Gas Gills Temporary (Compressible) Gas Gills Permanent (Incompressible) Gas Gills Functioning of Gas Gills Temporary (Compressible) Gas Gills Permanent (Incompressible) Gas Gills Gaseous Exchange Without an Open Tracheal System Motor Output Abdominal Ventilation in Insects Coupling between Spiracular Movements and Abdominal Ventilation Gill Retraction and Protraction Scaphognathite Depression and Levation Molluscan Respiratory Chambers Control of Ventilation Command Interneurons Local Control Centers The Pacemaker Coordinating Interneurons Sensory Modulation

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The imaginal ecdysis of the desert locust, Schistocerca gregaria.

Cited by 32 publications

References 24 publications

Neuromodulation and the toolkit for behavioural evolution: can ecdysis shed light on an old problem?

Neuromodulation and the toolkit for behavioural evolution: can ecdysis shed light on an old problem?

Neuromuscular and hormonal control of post‐eclosion processes in flies

Invertebrate Respiratory Systems

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