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Keywords: locust
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Journal Articles
J Exp Biol (2019) 222 (16): jeb208553.
Published: 21 August 2019
... problem of adapting these movements to step-like changes in body morphology during metamorphosis or moulting. Locusts are hemimetabolous insects in which the imaginal moult to adulthood results in a sudden and dramatic allometric growth of the wings relative to the body and the legs. We show that, despite...
Journal Articles
J Exp Biol (2018) 221 (24): jeb191320.
Published: 10 December 2018
...Tarquin P. Stott; Erik G. N. Olson; Rachel H. Parkinson; John R. Gray ABSTRACT Adaptive collision avoidance behaviours require accurate detection of complex spatiotemporal properties of an object approaching in an animal's natural, three-dimensional environment. Within the locust, the lobula giant...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (23): 4432–4439.
Published: 01 December 2017
... tubes of the tracheal system. This study measured maximum flight metabolic rate (FMR) during tethered flight in the migratory locust Locusta migratoria under varying oxygen partial pressure ( P O 2 ) in background gas mixtures of nitrogen (N 2 ), sulfur hexafluoride (SF 6 ) and helium (He), to vary O 2...
Journal Articles
J Exp Biol (2013) 216 (8): 1423–1429.
Published: 15 April 2013
... widely conserved. However, based on the variation of DNA methyltransferase genes in invertebrates, it has also been proposed that DNA methylation could provide a molecular mechanism for ecological adaptation. We have now analyzed the methylome of the desert locust, Schistocerca gregaria , which...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (19): 3388–3393.
Published: 01 October 2012
... pulses (flutter phase), and then a period in which respiratory gases move freely between insect and environment (open phase). This study measured CO 2 emission in resting locusts Locusta migratoria throughout ontogeny, in normoxia (21 kPa P O2 ), hypoxia (7 kPa P O2 ) and hyperoxia (40 kPa P O2 ), to...
Journal Articles
J Exp Biol (2012) 215 (19): 3394–3402.
Published: 01 October 2012
... examined the role of a locust FGLa/AST (Scg-AST-6) in the gut. Proctolin and Scg-AST-6 have opposing effects on gut contraction, where proctolin dose-dependently increases gut muscle tension, while Scg-AST-6 inhibits both muscle tension and spontaneous and neurogenic contractions in a dose-dependent manner...
Journal Articles
J Exp Biol (2012) 215 (18): 3317–3323.
Published: 15 September 2012
... where insects have been tethered. To address this issue, oxygen consumption was measured during tethered flight in adult locusts Locusta migratoria , some of which had a weight attached to each wing (totalling 30–45% of body mass). Mass-specific metabolic rate increased from 28±2 μmol O 2 g −1 h −1 at...
Journal Articles
J Exp Biol (2012) 215 (18): 3324–3333.
Published: 15 September 2012
... oxygen. We tested this in the respiratory system of the adult migratory locust Locusta migratoria by comparing the aerobic capacity of hopping and flight muscle with the morphology of the oxygen cascade. Maximum oxygen uptake by flight muscle during tethered flight is 967±76 μmol h −1 g −1 (body mass...
Journal Articles
J Exp Biol (2011) 214 (19): 3218–3224.
Published: 01 October 2011
...Edward P. Snelling; Roger S. Seymour; Philip G. D. Matthews; Sue Runciman; Craig R. White SUMMARY The hemimetabolous migratory locust Locusta migratoria progresses through five instars to the adult, increasing in size from 0.02 to 0.95 g, a 45-fold change. Hopping locomotion occurs at all life...
Journal Articles
J Exp Biol (2011) 214 (19): 3165–3172.
Published: 01 October 2011
... of sound in the cochlea; however, certain animals lacking a cochlea and hair cells are also reported to be capable of DPOAEs. In the Insecta, DPOAEs have been recorded from the locust auditory organ. However, the site of generation of these DPOAEs and the physiological mechanisms causing their...
Journal Articles
J Exp Biol (2011) 214 (19): 3225–3237.
Published: 01 October 2011
... the respiratory system of the migratory locust, Locusta migratoria , by comparing the aerobic capacity of the jumping muscles with the morphology of the oxygen cascade in the hopping legs using an intraspecific allometric analysis of different body mass ( M b ) at selected juvenile life stages. The...
Includes: Supplementary data
Journal Articles
J Exp Biol (2010) 213 (19): 3378–3387.
Published: 01 October 2010
...David Cofer; Gennady Cymbalyuk; William J. Heitler; Donald H. Edwards SUMMARY Locust can jump precisely to a target, yet they can also tumble during the trajectory. We propose two mechanisms that would allow the locust to control tumbling during the jump. The first is that prior to the jump...
Journal Articles
J Exp Biol (2010) 213 (15): 2629–2639.
Published: 01 August 2010
...Peter J. Simmons; Rob R. de Ruyter van Steveninck SUMMARY We investigate coding in a locust brain neuron, DNI, which transforms graded synaptic input from ocellar L-neurons into axonal spikes that travel to excite particular thoracic flight neurons. Ocellar neurons are naturally stimulated by...
Journal Articles
J Exp Biol (2010) 213 (7): 1060–1068.
Published: 01 April 2010
...D. Cofer; G. Cymbalyuk; W. J. Heitler; D. H. Edwards SUMMARY The neural circuitry and biomechanics of kicking in locusts have been studied to understand their roles in the control of both kicking and jumping. It has been hypothesized that the same neural circuit and biomechanics governed both...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2009) 212 (3): 401–412.
Published: 01 February 2009
... hormones. One of these, the ion transport peptide (ITP), is a chloride transport-stimulating and acid secretion-inhibiting hormone similar to crustacean hyperglycaemic hormones(CHHs). In locusts, moths and fruit flies, ITP together with the slightly longer ITPL isoforms, inactive in hindgut bioassays...
Journal Articles
J Exp Biol (2007) 210 (24): 4448–4456.
Published: 15 December 2007
...Philip L. Newland; Paul Yates SUMMARY In locusts, a central pattern generator underlies the rhythmic movements of the ovipositor valves that serve to drive the abdomen into damp soil in order to lay eggs. We have investigated the role of nitric oxide (NO) in the control of this oviposition digging...
Journal Articles
J Exp Biol (2006) 209 (23): 4690–4700.
Published: 01 December 2006
... photoperiod, prior heat experience and the sex of the animal. We compared thermosensitivity and thermotolerance of ventilatory motor pattern generation in locusts reared under two photoperiods (12:12 and 16:8; i.e. 12 h:12 h and 16 h:8 h L:D, respectively) before and after heat shock pre-treatment (HS: 3 h...
Journal Articles
J Exp Biol (2006) 209 (10): 1827–1836.
Published: 15 May 2006
...Peter Bräunig; Michael Schmäh; Harald Wolf SUMMARY The inhibitory innervation of the intersegmental (body wall) muscles between the first and the second thoracic segment of the migratory locust, Locusta migratoria , was investigated using neuroanatomical,immunocytochemical and...
Journal Articles
J Exp Biol (2005) 208 (23): 4451–4466.
Published: 01 December 2005
...Jessica Ausborn; Harald Wolf; Wolfgang Mader; Hartmut Kayser SUMMARY Pymetrozine is a neuroactive insecticide but its site of action in the nervous system is unknown. Based on previous studies of symptoms in the locust, the feedback loop controlling the femur–tibia joint of the middle leg was...
Journal Articles
J Exp Biol (2005) 208 (18): 3463–3473.
Published: 15 September 2005
...Spencer T. Behmer; Corlisa E. Belt; Martin S. Shapiro SUMMARY With the exception of honeybees, there have been few good invertebrate models for associative learning. Grasshoppers and locusts (Orthoptera:Acrididae) possess a number of characteristics that make them excellent candidates for such...