Abstract:
:In independent assays, workers of the ant Camponotus mus were conditioned to visit an arena where they found a large drop of sucrose solution of different concentrations, from 5 to 70% weight on weight (w/w). Single ants were allowed to collect the sucrose solution ad libitum, and feeding time, feeding interruptions, crop load, and intake rates were recorded. Feeding time increased exponentially with sucrose concentration, and this relationship was quantitatively described by the increase in viscosity with concentration corresponding to pure sucrose solutions. Ants collecting dilute solutions (5 to 15% w/w) returned to the nest with partial crop loads. Crop filling increased with increasing sucrose concentration, and reached a maximum at 42.6% w/w. Workers collecting highly concentrated solutions (70% w/w) also returned to the nest with a partially-filled crop, as observed for dilute solutions. Nectar intake rate was observed to increase with increasing sucrose concentration in the range 5 to 30% sucrose. It reached a maximum at 30.8%, and declined with increasing sucrose concentration. Results suggest that both sucrose concentration and viscosity of the ingested solution modulate feeding mechanics as well as the worker's decision about the load size to be collected before leaving the source.
journal_name
J Insect Physioljournal_title
Journal of insect physiologyauthors
Roces F,Farina WM,Josens RBdoi
10.1016/s0022-1910(98)00053-5keywords:
subject
Has Abstractpub_date
1998-07-01 00:00:00pages
579-585issue
7-8eissn
0022-1910issn
1879-1611pii
S0022-1910(98)00053-5journal_volume
44pub_type
杂志文章abstract::Lepidoptera males bear concomitantly nucleate (eupyrene) and anucleate (apyrene) spermatozoa. Both kinds of spermatozoa reach the spermatheca of inseminated females but only the eupyrene ones fertilize the eggs. The functions of the apyrene spermatozoa are still uncertain. Eupyrene spermatogenesis is regular and highl...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/s0022-1910(97)00044-9
更新日期:1997-11-01 00:00:00
abstract::The prevailing paradigm for social wasp endocrinology is that of juvenile hormone (JH) functioning pleiotropically in potential and actual queens, where it fuels dominance behaviors, stimulates ovarian growth and/or affects the production of status-linked cuticular compounds. In colonies with annual cycles (e.g., temp...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2016.11.014
更新日期:2017-04-01 00:00:00
abstract::To develop inside their insect hosts, endoparasitoid wasps must either evade or overcome the host's immune system. Several ichneumonid and braconid wasps inject polydnaviruses that display well-studied immune suppressive effects. However, little is known about the strategies of immunoevasion used by other parasitoid f...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/s0022-1910(03)00054-4
更新日期:2003-05-01 00:00:00
abstract::Aquatic insects play critical roles in freshwater ecosystems and temperature is a fundamental driver of species performance and distributions. However, the physiological mechanisms that determine the thermal performance of species remain unclear. Here we used a metabolomics approach to gain insights into physiological...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2017.07.008
更新日期:2017-08-01 00:00:00
abstract::Force feeding of RH-5992 (Tebufenozide), a non-steroidal ecdysone agonist to newly moulted sixth instar larvae of the spruce budworm, Choristoneura fumiferana, (Lepidoptera: Tortricidae) initiates a precocious, incomplete moult. Within 6h post treatment (pt) the larva stops feeding and remains quiescent. Around 12hpt,...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/s0022-1910(96)00062-5
更新日期:1997-02-19 00:00:00
abstract::By single sensillum tip recording technique, in addition to the salt and pH cells found in antennal taste sensilla of some ground beetles earlier, the third chemosensory cell of four innervating these large sensilla was electrophysiologically identified as a sugar cell in the ground beetle Pterostichus aethiops. This ...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2006.12.012
更新日期:2007-04-01 00:00:00
abstract::The hemocytes phagocytosis in response to microorganisms may play an important role in the cellular immune responses of insects. Here, we have evaluated the effects of the platelet-activating factor (PAF) and eicosanoids in the phagocytosis of hemocyte monolayers of Rhodnius prolixus to the yeast Saccharomyces cerevis...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2007.10.004
更新日期:2008-02-01 00:00:00
abstract::Electroantennogram (EAG) responses to the aphid sex pheromone components, (1R,4aS,7S,7aR)-nepetalactol and (4aS,7S,7aR)-nepetalactone, and a plant volatile, (E)-2-hexenal, were investigated at three different positions (5/6th, 4/5th and 3/4th inter-segmental regions) along the antennae of four different morphs in two ...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/s0022-1910(02)00082-3
更新日期:2002-05-01 00:00:00
abstract::Sugarcane is an important crop that has recently become subject to attacks from the weevil Sphenophorus levis, which is not efficiently controlled with chemical insecticides. This demands the development of new control devices for which digestive physiology data are needed. In the present study, ion-exchange chromatog...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2011.01.006
更新日期:2011-04-01 00:00:00
abstract::Resting potentials in Apis mellifera and Drosophila melanogaster flight muscles decrease with falling temperatures. When resting potentials fall to between -37 and -45 mV they activate a final burst of spontaneous muscle action potentials (MAPs). This final burst of MAPs marks the beginning of chill-coma for each spec...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/s0022-1910(99)00148-1
更新日期:2000-05-01 00:00:00
abstract::The adrenergic agonists octopamine, tyramine and clonidine inhibited the normal pheromonotropic action due to PBAN (pheromone biosynthesis activating neuropeptide) in incubations of intersegmental tissues that are situated between the 8th and 9th abdominal segments of the moth ovipositor tip. This inhibition was rever...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/s0022-1910(96)00088-1
更新日期:1997-03-01 00:00:00
abstract::RNA interference (RNAi) is a powerful tool for artificially manipulating gene expression in diverse organisms. In the honey bee, Apis mellifera, both long double stranded RNA (dsRNA) and small interference RNA (siRNA) have been successfully used to reduce targeted gene expression and induce specific phenotypes. Howeve...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2018.10.005
更新日期:2018-01-01 00:00:00
abstract::Many studies have established that microRNAs (miRNAs) regulate gene expression in various biological processes in mammals and insects including honey bees. Dancing behavior is a form of communication unique to honey bees. However, it remains unclear which miRNAs regulate the dancing behavior in honey bees, and how. In...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2012.08.008
更新日期:2012-11-01 00:00:00
abstract::Classical studies have described in detail the complex and regionalized morphology of the Malpighian tubule (MT) in larval Lepidoptera. Recent studies revealed unusual aspects of ion transport in the Malpighian tubules of the larva of the cabbage looper, Trichoplusia ni. These included: cation reabsorption via seconda...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2018.06.005
更新日期:2018-01-01 00:00:00
abstract::RNA interference has been successfully used in adult honeybees, but there are only few reports about abdominal application of dsRNA/siRNA which have reached more distant tissues than the fat body. We studied systemic RNAi in honeybees by injecting fluorescent siRNA of the ubiquitously expressed honeybee homologue of t...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2011.03.013
更新日期:2011-07-01 00:00:00
abstract::Dropping off is considered an anti-predator behavior for aphids since previous studies have shown that it reduces the risk of predation. However, little attention is paid to dropping behavior triggered by other external stresses such as daytime high temperatures which are predicted to become more frequent in the conte...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2012.08.012
更新日期:2012-11-01 00:00:00
abstract::Susceptibility to the fungus Metarhizium robertsii and changes in host defences were evaluated in different stages of the intermoult period (4-6 h, 34-36 h and 84-86 h post moult in IV larval instars) of the Colorado potato beetle. A significant thickening of the cuticle during larval growth was accompanied by decreas...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2019.05.003
更新日期:2019-07-01 00:00:00
abstract::Insecticidal properties of protease inhibitors have been established in transgenic plants. In the wake of continuous research and rapid development of protease inhibitors it is important to assess possible effects on beneficial insects like the honey bee (Apis mellifera L.). In this study, newly emerged caged bees wer...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2005.04.003
更新日期:2005-09-01 00:00:00
abstract::The hymenopteran Macrocentrus cingulum usually deposits one egg into the larval body cavity of lepidopteran Ostrinia furnacalis, and the egg subsequently splits into several dozens of embryos during its development. How the parasitoid eggs and embryos avoid encapsulation by the host's immune response remains unknown. ...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/s0022-1910(03)00021-0
更新日期:2003-04-01 00:00:00
abstract::Recent studies in fruit flies have imposed dietary restriction (DR) by diluting yeast and have reported increased lifespan as the yeast-to-sugar ratio decreased. In this study, the effects of DR on the lifespan of Bactrocera dorsalis were investigated using constant-feeding diets with different yeast:sugar ratios and ...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2013.07.006
更新日期:2013-10-01 00:00:00
abstract::To improve the efficiency of the ladybeetle Harmonia axyridis as a biological control agent against aphids, a flightless population was produced by feeding adults with a mutagen and selecting their progeny for non-flying but otherwise morphologically normal individuals. The inability to fly could result from a change ...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/s0022-1910(99)00160-2
更新日期:2000-05-01 00:00:00
abstract::The rice brown planthopper, Nilaparvata lugens, is an important migratory pest in many rice planting areas of Asia. The typical wing dimorphism of N. lugens gives them flexibility to adapt to different environmental cues. As an important hormone in the insect's endocrine regulation, juvenile hormone (JH) has previousl...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2017.08.012
更新日期:2017-10-01 00:00:00
abstract::Studies were undertaken to investigate vitellogenesis and its regulation in female adults of the fall armyworm, Spodoptera frugiperda. A single female-specific protein, likely to be the S. frugiperda vitellogenin (Vg), appeared approximately 5 h after adult eclosion in the hemolymph of virgin females. The concentratio...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/s0022-1910(99)00207-3
更新日期:2000-06-01 00:00:00
abstract::The immune system of Rhodnius prolixus comprehends the synthesis of different effectors that modulate the intestinal microbiota population and the life cycle of the parasite Trypanosoma cruzi inside the vector midgut. One of these immune responses is the production of reactive nitrogen species (RNS) derived by the act...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2020.104100
更新日期:2020-10-01 00:00:00
abstract::The extreme seasonal shifts of day length in polar regions, ranging from constant light in the summer to constant darkness in the winter, pose an intriguing environment for probing activity rhythms and the functioning of circadian clocks. Here, we monitor locomotor activity during the summer on the Antarctic Peninsula...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2015.07.008
更新日期:2015-10-01 00:00:00
abstract::The ability of first instar nymphs and newly moulted pre-reproductive adults of the grain aphid S. avenae to rapidly cold harden was investigated. When nymphs reared at 20 degrees C were transferred directly to -8 degrees C for 3 h, there was 18% survival. This exposure was selected as the discriminating temperature. ...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2004.01.003
更新日期:2004-04-01 00:00:00
abstract::Ants use their mandibles to manipulate many different objects including food, brood and nestmates. Different tasks require the modification of mandibular force and speed. Besides normal mandible movements the trap-jaw ant Odontomachus features a particularly fast mandible reflex during which both mandibles close synch...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/s0022-1910(98)00118-8
更新日期:1999-03-01 00:00:00
abstract::Haemolymph calcium homeostasis in insects is achieved through the regulation of calcium excretion by Malpighian tubules in two ways: (1) sequestration of calcium within biomineralized granules and (2) secretion of calcium in soluble form within the primary urine. Using the scanning ion-selective electrode technique (S...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2016.01.005
更新日期:2016-04-01 00:00:00
abstract::This study re-examines the effects of environmental factors including substrate color, humidity, food quality, light intensity and temperature on the green-brown polyphenism, black patterning and background body color of solitarious (isolated-reared) nymphs of Schistocerca gregaria. All individuals reared in yellow-gr...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2011.10.002
更新日期:2012-01-01 00:00:00
abstract::Earlier experiments demonstrated a strong up-regulation of per mRNA in wild-type (Wt) females of Pyrrhocoris apterus reared under diapause-inducing short days, while per mRNA levels were low in females of two non-diapause mutant strains (Nd), irrespective of photoperiod. In the present study, different sequences of pe...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2005.01.009
更新日期:2005-06-01 00:00:00