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Effects of salinity on survival,feeding behavior and growth of the juvenile swimming crab,Portunus trituberculatus(Miers,1876) 被引量:3
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作者 申屠基康 徐永健 丁张妮 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2015年第3期679-684,共6页
Effect of salinity on survival,feeding behavior and growth of juvenile swimming crab P ortunus trituberculatus was investigated under 5 salinity levels of 5,10,20,30 and 40. The results show that the crab juveniles fe... Effect of salinity on survival,feeding behavior and growth of juvenile swimming crab P ortunus trituberculatus was investigated under 5 salinity levels of 5,10,20,30 and 40. The results show that the crab juveniles fed 2 or 3 times at the salinity 20 and 30,each lasted for about 25 minutes,for a total feeding time of 73.2±22.65 minutes per day. At these salinities,there were significantly higher in the frequency of feeding and in total feeding time than those at lower salinities of 5 and 10. All crab juveniles moulted when reared at a salinity of 20 during the 5 days duration of the experiment,which is significantly higher than those at other salinities. All juveniles survived at salinity 20,and the survivorship was not significantly different from that at 30,but was signif icantly higher than those at other salinities. The crab juveniles reared at a salinity of 20 had the highest value of food ration of 0.190 8±0.011 3 g/g BW,average body weight gain of 0.796±0.128 g,gain rate of 87%–96%,and food conversion ratio of 1.20±0.09. There was no significant difference in the values found between 20 and 30 but these values were significantly lower than that at the other salinities( P> 0.05). Highest activities of digestive enzymes(Amylase,Protease,Lipase) and lowest activities of protective enzymes(SOD,PO,CAT) were also obtained on crab juveniles reared at salinity of 20. 展开更多
关键词 swimming crab SALINITY feeding behavior MOULTING GROWTH mortality
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EPG Comparison of Sitobion avenae (Fab.) Feeding Behavior on Three Wheat Varieties 被引量:4
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作者 HU Xiang-shun ZHAO Hui-yan HU Zu-qing LI Dong-hong ZHANG Yu-hong 《Agricultural Sciences in China》 CAS CSCD 2008年第2期180-186,共7页
This article was to study the potential resistance mechanism of three different wheat varieties (Ww2730, Xiaoyan 22 and Batis) in the seedling stage to Sitobion avenae. The aphid feeding behavior was ascertained by ... This article was to study the potential resistance mechanism of three different wheat varieties (Ww2730, Xiaoyan 22 and Batis) in the seedling stage to Sitobion avenae. The aphid feeding behavior was ascertained by stylet penetration activities monitoring using the electrical penetration graph (EPG) technique. When the aphids feed on Ww2730 seedlings, the time for the 1st duration probing was later than that on Xiaoyan 22 and Batis significantly, and the number of interrupted probing before the 1st duration probing was more than that on Xiaoyan 22 and Batis significantly, and the 1st duration probing was shorter than that on Xiaoyan 22 and Batis significantly. The durations of the stylet pierce from the extra- to the intra-cellular (pd Ⅱ-1) on Ww2730 and Xiaoyan 22 were longer than those on Batis significantly. The duration of the potential drop (pd) in C wave on Ww2730 was longer than that on Xiaoyan 22 and Batis significantly. The times and duration of the G wave (ingestion in xylem) on Ww2730 were more and longer than those on Xiaoyan 22 and Batis significantly. The times of spot G wave on Batis was more than that on Ww2730 significantly, but the duration of spot G was shorter than that on Xiaoyan 22 and Ww2730 significantly. The total time of E1 wave, the longest duration of E1 fractions, and the mean duration time of E1 fractions that followed E2 wave on Xiaoyan 22 and Batis were all significantly longer than those on Ww2730. There was no difference of the mean duration of the 1st E1 wave on the 3 varieties, but the mean durations of other E1 wave on Ww2730 and Xiaoyan 22 were shorter than those on Batis significantly. The other wave parameters, including times and durations of F and E2 were all not different on the 3 wheat varieties. It is suggested that the resistance mechanism of wheat variety Ww2730 to S. avenae is a restriction factor of feeding in epidermis, the thicker cell wall in mesophyll, and secondary metabolites or nutrition unbalance in phloem in the seedling phase. The resistance mechanism of Xiaoyan 22 is thicker cell wall and more cell layer in mesophyll in the seedling phase. The feeding strategy of S. avenae against the resistance of Ww2730 was to shorten the second duration of secrete watery salivation to xylem than the first. 展开更多
关键词 WHEAT Sitobion avenae resistance mechanism electrical penetration graph (EPG) feeding behavior
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Comparison of time-restricted and ad libitum self-feeding on the growth,feeding behavior and daily digestive enzyme profiles of Atlantic salmon 被引量:1
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作者 史策 刘鹰 +5 位作者 衣萌萌 郑纪盟 田会芹 杜以帅 李贤 孙国祥 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2017年第4期729-736,共8页
Although it has been hypothesized that a predictable feeding regime in animals allows physiological variables to be adjusted to maximize nutrient utilization and,hence,better growth performance,the assumption has rare... Although it has been hypothesized that a predictable feeding regime in animals allows physiological variables to be adjusted to maximize nutrient utilization and,hence,better growth performance,the assumption has rarely been tested.This study compares the effects of time-restricted versus free access self-feeding on the growth,feeding behavior and daily digestive enzyme rhythms of Atlantic salmon(Salmo salar).In an experiment that lasted 6 weeks,fish(109.9 g) were divided into two groups:group 1 had free access to a self-feeder(FA);group 2 received three meals per day(2 h per meal) at dawn,midday and dusk via a time-restricted self-feeder(TR).At the end of the experiment,the fish were sampled every 3 h over a24-h period.The results showed that the TR fish quickly synchronized their feeding behavior to the feeding window and their blood glucose showed a significant postprandial increase,while FA fish displayed no statistically significant rhythms(P>0.05).Pepsin activity of TR fish also showed a significant daily rhythm(P<0.05) with the acrophase at the second feed and a decrease over the next 12 h.Average daily trypsin,lipase and amylase levels of FA fish were significantly lower than those of TR fish(P<0.01);however,the growth performance of both groups was similar(P>0.05).In conclusion,the study failed to confirm a link between the entrainment of daily digestive enzyme profiles and growth performance,with the TR group showing comparatively poor blood glucose regulation. 展开更多
关键词 Atlantic salmon (Salmo salar) self-feeding regime feeding behavior digestive physiology daily rhythm
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Effects of a novel mesoionic insecticide,triflumezopyrim,on the feeding behavior of rice planthoppers,Nilaparvata lugens and Sogatella furcifera(Hemiptera:Delphacidae) 被引量:1
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作者 ZHU Jun SUN Wen-qing +4 位作者 LI Yao GE Lin-quan YANG Guo-qing XU Jian-xiang LIU Fang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2020年第10期2488-2499,共12页
The rice planthoppers,Nilaparvata lugens and Sogatella furcifera,are important sap-sucking pests of rice in Asia.The mesoionic insecticide tifumezopyrim was previously shown to be highly effective in controlling both ... The rice planthoppers,Nilaparvata lugens and Sogatella furcifera,are important sap-sucking pests of rice in Asia.The mesoionic insecticide tifumezopyrim was previously shown to be highly effective in controlling both N.lugens and S.furcifera.In this study,electropenetrography(EPG)was used to evaluate the effect of three triflumezopyrim concentrations(LC。LC。and LC)on the feeding behavior of N.lugens and S.furcifera.EPG signals of planthoppes indicated that there were six different waveforms NP,N1,N2,N3,N4,and N5,which corresponded to non-penetration,stylet penetration into epidermis,salivation,extracellular movement of stylet,sap ingestion in phloem,and water ingestion in xylem during feeding.Compared to untreated controls,triflumezopyrim at LC。and LC。prolonged the duration of the non-penetration period by 105.3 to 333.7%.The probing frequencies of N.lugens exposed to tiflumezopyrim at LC1。and LCso were significantly increased;however,the probing frequencies of S.furcifera showed a significant decrease when exposed to triflumezopyrim at all concentrations.Triflumezopyrim exposure prolonged the duration of salivation and shortened the duration of extracellular movement.The duration of phloem sap ingestion decreased from 37.2 to 77.7%in the LCgo and LCgo treatments,respectively.Differences in feeding behavior in response to triflumezopyrim and pymetrozine were minimal.In summary,the results show that the LC。and LCgo concentrations of trflumezopyrim inhibit the feeding activities of N.lugens and S.furcifera mainly by prolonging the duration of non penetration and by shortening the duration of phloem sap ingestion,which may foster more efficient use of triflumezopyrim in Asia. 展开更多
关键词 Nilaparvata lugens Sogatella furcifera triflumezopyrim pymetrozine feeding behavior EPG
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Systematic analysis of feeding behaviors and their effects on feed efficiency in Pekin ducks 被引量:1
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作者 Feng Zhu Yahui Gao +3 位作者 Fangbin Lin Jinping Hao Fangxi Yang Zhuocheng Hou 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2018年第1期248-256,共9页
Background: Feeding behavior study is important for animal husbandry and production. However, few studies were conducted on the feeding behavior and their relationship with feeding efficiency in Pekin ducks. In order... Background: Feeding behavior study is important for animal husbandry and production. However, few studies were conducted on the feeding behavior and their relationship with feeding efficiency in Pekin ducks. In order to investigate the feeding behavior and their relationship with feed efficiency and other economic traits in Pekin ducks, we selected 358 male Pekin ducks and recorded feeding information between 3 to 6 wk of age using automatic electronic feeders, and compared the feeding behavior under different residual feed intake(RFI) levels.Results: We observed that total feed time, daily feed intake and feed intake per meal had strong positive correlations with feed efficiency traits; moreover, strong correlation between feed intake per meal and body weight was found(R=0.32, 0.36). Daily feeding rate meal and meal duration had weak correlations with feed efficiency(R=0.14~0.15). The phenotypic correlation of between-meal pauses, with feed efficiency was not observed. When daily changes were analyzed, high RFI ducks had the highest feed consumption over all times, and obvious differences in daily visits were found among different RFI level animals during the middle period; these differences were magnified with age, but there was no difference in daily meal number. Moreover, our data indicate that high RFI birds mainly take their meals at the edge of the population enclosure, where they are more susceptible to environmental interference.Conclusions: Overal, this study suggests that the general feeding behaviors can be accurately measured using automatic electronic feeders and certain feeding behaviors in Pekin ducks are associated with improved feed efficiency. 展开更多
关键词 Economic traits feeding behavior Feed efficiency Pekin duck
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Sensory bases and the mode of feeding behavior of tongue sole Cynoglossus semilaevis
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作者 王新安 马爱军 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2009年第4期708-713,共6页
We conducted behavior experiments on the roles of vision, olfaction, and the lateral line in feeding in tongue sole Cynoglossus semilaevis Gtinter. Chemical cues from the prey alone could not elicit any searching or a... We conducted behavior experiments on the roles of vision, olfaction, and the lateral line in feeding in tongue sole Cynoglossus semilaevis Gtinter. Chemical cues from the prey alone could not elicit any searching or attacking behavior by the fish; only when moving foods were presented, the chemical nature of the foods affected feeding. In addition, we found that normal tongue sole did not accurately recognize moving artificial prey of different shapes. Neither chemosense nor vision plays an important role in prey detection. Reactions to moving objects and the response of the oropharyngeal cavity to different foods showed that the (eyeless) tongue sole use mainly the lateral line for prey detection and capture. Gustation in the oropharyngeal cavity is essential for the fish to swallow its prey. 展开更多
关键词 Cynoglossus semilaevis feeding behavior sensory bases feeding mode
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Preference, Feeding Behavior, and in Vitro Fermentation Characteristics of Pelleted Feeds Containing Alkaline Aqueous Lignin By-Product from Paper Processing in Holstein Heifers
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作者 Bruna C.Agustinho Hsin-Tai Hong +4 位作者 Kathryne Blair Chia-Yu Tsai Hao-Che Hung Anne H.Laarman Pedram Rezamand 《Journal of Agricultural Science and Technology(A)》 2022年第2期54-64,共11页
The objectives of this study were to evaluate the effect of using multiple dietary inclusion rates of alkaline aqueous lignin by-product(AALB),in replacing a commercial binder,on the preference and feeding behavior of... The objectives of this study were to evaluate the effect of using multiple dietary inclusion rates of alkaline aqueous lignin by-product(AALB),in replacing a commercial binder,on the preference and feeding behavior of dairy heifers,and in vitro digestibility.In the experiment I,five pelleted diets including negative control(no-binder),commercial lignosulfonate binder,and 1.6%,3.2%,and 4.8%of AALB were tested.In the experiment II,five pelleted diets including negative control,positive control(2%molasses),and 1%,2.4%,and 3.8%of AALB(all combined with 2%of molasses)were tested.Feeding behavior and preference were determined for 60 min per animal per evaluation.In vitro digestibility was determined for each pelleted diet for 48 h over five incubation runs.Results from Experiment I showed animals receiving 1.6%of AALB diet showed the greatest preference(dry matter(DM),intake)and a greater number of approaches with eating than other diets.The preference was lower when animals received control or 4.8%AALB diets relative to other diets.Results from Experiment II revealed animals receiving 3.8%AALB combined with molasses showed the greatest DM intake preference over 60 min,and DM intake per approach.Diets that included 2.4%and 3.8%of AALB combined with molasses presented the greatest in vitro DM digestibility.Overall,heifers showed a greater intake when receiving pelleted diets with 1.6%AALB.Furthermore,preference,intake over 60 min,and in vitro DM digestibility,were greater in the pelleted diets that contained higher rates of AALB when combined with molasses. 展开更多
关键词 Dairy heifer feeding behavior feed binder LIGNIN pellet.
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Feeding behavior and hormoligosis associated with imidacloprid resistance in Asian citrus psyllid,Diaphorina citri
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作者 Xue Dong Chen Justin George +4 位作者 Lauren M.Diepenbrock Hunter Gossett Guoping Liu Jawwad A.Qureshi Lukasz L.Stelinski 《Insect Science》 SCIE CAS CSCD 2024年第4期1211-1221,共11页
Imidacloprid is a neonicotinoid insecticide used for managing the Asian citrus psyllid,Diaphorina citri Kuwayama,which serves as vector of phytopathogens causing citrus greening.However,development of resistance to ne... Imidacloprid is a neonicotinoid insecticide used for managing the Asian citrus psyllid,Diaphorina citri Kuwayama,which serves as vector of phytopathogens causing citrus greening.However,development of resistance to neonicotinoids among populations of D.citri has coincided with occasional control failures in the field.The objectives of this research were to(1)survey current levels of imidacloprid resistance in Florida citrus;(2)compare feeding behavior between imidacloprid-resistant and susceptible D.citri using electrical penetration graph recordings,and(3)investigate the possible amplification of insecticide hormoligosis associated with resistance.Field surveys confirmed that the susceptibility of D.citri populations to imidacloprid has decreased in commercial Florida citrus groves compared with a laboratory-susceptible population.Following 12 generations of selection,resistance to imidacloprid increased by 438 fold compared with the susceptible strain.Imidacloprid-susceptible D.citri feeding on citrus exhibited significantly more bouts associated with intercellular pathway(C),phloem penetration(D),phloem salivation(E1),and nonprobing(Np)activities than imidacloprid-resistant counterparts.However,there were no differences observed in the frequency or duration of phloem ingestion or xylem feeding between susceptible and resistant D.citri.There was no statistical difference in fecundity between resistant and susceptible strains.However,the fecundity of imidacloprid-susceptible female D.citri treated with a sublethal concentration of imidacloprid(LC_(25))increased significantly compared with controls,while such hormoligosis was less pronounced among imidacloprid-resistant psyllids.Our results suggest that imidacloprid-resistant psyllids may cease feeding sooner than susceptible counterparts following sublethal exposure to this insecticide,indicative of a behavioral resistance mechanism. 展开更多
关键词 artificial selection electrical penetration graph feeding behavior hormoligosis insecticide resistance sublethal exposure
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Central nervous system regulation of food intake and energy expenditure:role of galanin-mediated feeding behavior 被引量:2
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作者 方彭华 郁梅 +3 位作者 马银屏 李健 隋玉梅 史明仪 《Neuroscience Bulletin》 SCIE CAS CSCD 2011年第6期407-412,共6页
Galanin is a neuropeptide widely expressed in the brain.It is implicated in energy expenditure,feeding,and the regulation of body weight.Numerous studies have revealed that galanin regulates food intake via galanin re... Galanin is a neuropeptide widely expressed in the brain.It is implicated in energy expenditure,feeding,and the regulation of body weight.Numerous studies have revealed that galanin regulates food intake via galanin receptors,5-HT1A receptor and adrenergic α-2 receptor.In this review,we summarize recent findings that reveal the essential role of galanin in increasing food intake as well as body weight and that identify the individual galanin receptor subtypes involved in the brain's modulation of food intake and energy expenditure,to provide a theoretical basis for further studies of different aspects of galanin action. 展开更多
关键词 GALANIN RECEPTOR feeding behavior central nervous system
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Impact Evaluation of Insect-Resistant Transgenic Rice on the Feeding and Oviposition Behavior of Its Non-Target Insect, the Brown Planthopper, Nilaparvata lugens (Homptera: Delphacidae) 被引量:7
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作者 CHENMao YEGong-yin +2 位作者 YAOHong-wei HUCui SHUQing-yao 《Agricultural Sciences in China》 CAS CSCD 2003年第9期1000-1006,共7页
The feeding and oviposition behavior of the brown planthopper (BPH), Nilaparvata lugens on two transgenic indica rice homogenous genotypes (B1 and B6) with cry1Ab gene from Bacillus thuringiensis and trans... The feeding and oviposition behavior of the brown planthopper (BPH), Nilaparvata lugens on two transgenic indica rice homogenous genotypes (B1 and B6) with cry1Ab gene from Bacillus thuringiensis and transgenic restored line of hybrid rice (MSA) with SCK gene (a modified CpTI gene) were measured, compared with those on their corresponding non transgenic parental cultivars Jiazao935 and Minghui86 performed by BPH. Under the selection condition of host plants by BPH, loading percentage, oviposition preference and laying egg number of BPH both on transgenic cry1Ab rice and transgenic SCK rice were not significantly different from those on their controls, while their total number of probing wound caused by PBH expect for feeding on B1 plants was markedly more than that on the control. In contrast, under the non selection condition, total number of probing wound caused by BPH on either transgenic cry1Ab rice or transgenic SCK rice was pronouncedly more than those on their controls. Conversely, their honeydew amount excreted by BPH after feeding for 24 h was significantly less than those on the control. As a conclusion, three tested transgenic rice genotypes with insect resistance acted adverse effect on BHP feeding, and no marked effect on BPH oviposition. 展开更多
关键词 Transgenic rice cry1Ab gene SCK gene Nilaparvata lugens feeding behavior Oviposition behavior
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Geomagnetic field absenee reduces adult body weight of a migratory insect by disrupt!ng feeding behavior and appetite regulation 被引量:1
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作者 Gui-Jun Wan Shou-Lin Jiang +5 位作者 Ming Zhang Jing-Yu Zhao Ying-Chao Zhang Wei-Dong Pan Gregory A.Sword Fa-Jun Chen 《Insect Science》 SCIE CAS CSCD 2021年第1期251-260,共10页
The geomagnetic field(GMF)is well documented for its essential role as a cue used in animal orientation or navigation.Recent evidence indicates that the absence of GMF(mimicked by the near-zero magnetic field,NZMF)can... The geomagnetic field(GMF)is well documented for its essential role as a cue used in animal orientation or navigation.Recent evidence indicates that the absence of GMF(mimicked by the near-zero magnetic field,NZMF)can trigger stress-like responses such as reduced body weight,as we have previously shown in the brown planthopper,Nilaparvata lugens.In this study,we found that consistent with the significantly decreased body weight of newly emerged female(—14.67%)and male(—13.17%)adult N.lugens,the duration of the phloem ingestion feeding waveform was significantly reduced by 32.02%in 5th instar nymphs reared under the NZMF versus GMF.Interestingly,5th instar nymphs that exhibited reduced feeding had significantly higher glucose levels(+16.98%and+20.05%;24 h and 48 h after molting),which are associated with food aversion,and expression patterns of their appetite-related neuropeptide genes(neuropeptide F,dow regulated overall;short neuropeptide F,dowregulated overall;adipokinetic hormone up-regulated overall;and adipokinetic hormone receptor,down-regulated overall)were also altered under the absence of GMF in a manner consistent with diminishing appetite.Moreover,the expressions of the potential magnetosensor croptochromes(Crys)were found significantly altered under the absence of GMF,indicating the likely upstream signaling of the Cry-mediated magnetoreception mechanisms.These findings support the hypothesis that strong changes in GMF intensity can reduce adult body weight through affecting insect feeding behavior and underlying regulatory processes including appetite regulation.Our results highlight that GMF could be necessary for the maintenanee of energy homeostasis in insects. 展开更多
关键词 APPETITE body weight feeding behavior geomagnetic field MAGNETORECEPTION Nilaparvata lugens
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Recent advances in the neural regulation of feeding behavior in adult Drosophila 被引量:1
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作者 Gao-hang WANG Li-ming WANG 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2019年第7期541-549,共9页
The ability to maintain metabolic homeostasis is a key capability critical for the survival and well-being of animals living in constantly changing environments.Metabolic homeostasis depends on neuromodulators,such as... The ability to maintain metabolic homeostasis is a key capability critical for the survival and well-being of animals living in constantly changing environments.Metabolic homeostasis depends on neuromodulators,such as biogenic amines,neuropeptides,and hormones,to signal changes in animals’ internal metabolic status and to orchestrate their behaviors accordingly.An important example is the regulation of feeding behavior by conserved molecular and cellular mechanisms across the animal kingdom.Its relatively simple brain coupled with well-characterized genetics and behavioral paradigms makes the fruit fly Drosophila melanogaster an excellent model for investigating the neuromodulatory regulation of feeding behavior.In this review we discuss the neuromodulators and neural circuits that integrate the internal physiological status with external sensory cues and modulate feeding behavior in adult fruit flies.Studies show that various specific aspects of feeding behavior are subjected to unique neuromodulatory regulation,which permits fruit flies to maintain metabolic homeostasis effectively. 展开更多
关键词 feeding behavior Drosophila melanogaster Neuromodulatory regulation Internal status Sensory processing
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Stressful living in lower-quality habitats?Body mass,feeding behavior and physiological stress levels in wild wood mouse populations
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作者 Álvaro NAVARRO-CASTILLA Isabel BARJA 《Integrative Zoology》 SCIE CSCD 2019年第1期114-126,共13页
Wild populations are continuously subjected to changes in environmental factors that pose different challenges.Body condition and hormones have been commonly used as health indicators due to their potential correlatio... Wild populations are continuously subjected to changes in environmental factors that pose different challenges.Body condition and hormones have been commonly used as health indicators due to their potential correlation with fitness.In the present study,we analyzed whether habitats of different quality influenced body mass,food intake and physiological stress levels in wild wood mice(Apodemus sylvaticus).Field work was seasonally carried out in Holm oak woods and pine forests in central Spain.A total of 93 wood mice from 4 different populations(2 per habitat type)were live-trapped.From each captured individual we noted body mass and food intake,measured as the amount of bait remaining in each trap.The physiological stress levels were measured non-inva-sively in collected fresh feces by quantifying fecal corticosterone metabolites(FCM)with a 5a-pregnane-3ß,11ß,21-triol-20-one enzyme immunoassay.Wood mice abundances decreased from spring to summer,were higher in Holm oak woods than in pine forests and also resulted in different age-class distribution between both habitats.Individuals inhabiting pine forests showed a lower body mass and increased food intake,probably because of the comparatively lower food quality and availability in this habitat.Furthermore,these individuals showed increased physiological stress levels,likely due to the lower quality habitat in relation to both food and vegetation cover availability.Overall,besides affecting local wood mouse abundance,our study underscores the effect of habitat quality on body mass,food intake and the endocrine stress response.Considering the wood mouse’s piv-otal position in ecosystems,these results could help in the understanding of environmental traits hampering the viability of wild populations. 展开更多
关键词 Apodemus sylvaticus body condition CORTICOSTERONE environmental factors fecal corticosterone metabolites feeding behavior
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Identification of neurons responsible for feeding behavior in the Drosophila brain
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作者 SUN Fei WANG YiJin +3 位作者 ZHOU YanQiong VAN SWINDEREN Bruno GONG ZheFeng LIU Li 《Science China(Life Sciences)》 SCIE CAS 2014年第4期391-402,共12页
Drosophila melanogaster feeds mainly on rotten fruits, which contain many kinds of sugar. Thus, the sense of sweet taste has evolved to serve as a dominant regulator and driver of feeding behavior. Although several su... Drosophila melanogaster feeds mainly on rotten fruits, which contain many kinds of sugar. Thus, the sense of sweet taste has evolved to serve as a dominant regulator and driver of feeding behavior. Although several sugar receptors have been described, it remains poorly understood how the sensory input is transformed into an appetitive behavior. Here, we used a neural silencing approach to screen brain circuits, and identified neurons labeled by three Gal4 lines that modulate Drosophila feeding behavior. These three Gal4 lines labeled neurons mainly in the suboesophageal ganglia (SOG), which is considered to be the fly's pri- mary taste center. When we blocked the activity of these neurons, flies decreased their sugar consumption significantly. In contrast, activation of these neurons resulted in enhanced feeding behavior and increased food consumption not only towards sugar, but to an array of food sources. Moreover, upon neuronal activation, the flies demonstrated feeding behavior even in the absence of food, which suggests that neuronal activation can replace food as a stimulus for feeding behavior. These findings indicate that these Gal4-1abeled neurons, which function downstream of sensory neurons and regulate feeding behavior to- wards different food sources is necessary in Drosophila feeding control. 展开更多
关键词 feeding behavior sugar-sensing neurons SOG CAFE assay proboscis extension response (PER)
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The human-derived novel gut commensal Luoshenia tenuis regulates body weight and food intake in mice
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作者 Yu Jiang Mengxuan Du +6 位作者 Lisheng Xie Minzhi Jiang Yaokun Zhang Mingxia Bi Chang Liu Hongwei Liu Shuangjiang Liu 《Food Science and Human Wellness》 SCIE CSCD 2024年第2期830-841,共12页
Many studies have revealed that gut microbes modulate host metabolism.In this study,we characterized the therapeutic effects of a novel gut commensal Luoshenia tenuis against host metabolic disorders.First,by in silic... Many studies have revealed that gut microbes modulate host metabolism.In this study,we characterized the therapeutic effects of a novel gut commensal Luoshenia tenuis against host metabolic disorders.First,by in silico analysis,we demonstrated that the L.tenuis was prevalent in the gut microbiomes of healthy humans but were depleted specifically in obesity cohorts.Further in vitro cultivation revealed that L.tenuis produced short chain fatty acids that were verified to modulate host metabolism and some other volatile metabolites to benefit hosts by anti-inflammation and anti-tumor.Second,gavage of the L.tenuis significantly decreased the body weight gain and food intake of high-fat diet-feeding C57BL/6J mice,which was in parallel with the changed expression level of genes related to satiety and feeding behavior.We then performed the gavage trial using diet induced obese mice,and it revealed that the administration of L.tenuis alleviated significantly the abnormal glucose and lipid metabolisms and reduced the inflammatory response.In summary,this study revealed a previously-unknown human gut commensal microbe that benefited host metabolism,and set the stage for the development of novel next-generation probiotic applicable for treatment of obesity and related metabolic disorders. 展开更多
关键词 Luoshenia tenuis Gut microbe feeding behavior OBESITY Next-generation probiotic
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916 MHz electromagnetic field exposure affects rat behavior and hippocampal neuronal discharge
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作者 Dongmei Hao Lei Yang +2 位作者 Su Chen Yonghao Tian Shuicai Wu 《Neural Regeneration Research》 SCIE CAS CSCD 2012年第19期1488-1492,共5页
Wistar rats were exposed to a 916 MHz, 10 W/m2 mobile phone electromagnetic field for 6 hours a day 5 days a week. Average completion times in an eight-arm radial maze were longer in the exposed rats than control rats... Wistar rats were exposed to a 916 MHz, 10 W/m2 mobile phone electromagnetic field for 6 hours a day 5 days a week. Average completion times in an eight-arm radial maze were longer in the exposed rats than control rats after 4-5 weeks of exposure. Error rates in the exposed rats were greater than the control rats at 6 weeks. Hippocampal neurons from the exposed rats showed irregular firing patterns during the experiment, and they exhibited decreased spiking activity 6-9 weeks compared with that after 2 5 weeks of exposure. These results indicate that 916 MHz electromagnetic fields influence leaming and memory in rats during exposure, but long-term effects are not obvious. 展开更多
关键词 electromagnetic field Wistar rats maze learning feeding behavior NEURONS neural regeneration
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Genetic parameters of drinking and feeding traits of wean-to-finish pigs under a polymicrobial natural disease challenge
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作者 Jian Cheng Austin M.Putz +5 位作者 John C.S.Harding Michael K.Dyck Frederic Fortin Graham S.Plastow Pig Gen Canada Jack C.M.Dekkers 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2022年第1期17-35,共19页
Background:The pork industry faces unprecedented challenges from disease,which increases cost of production and use of antibiotics,and reduces production efficiency,carcass quality,and animal wellbeing.One solution is... Background:The pork industry faces unprecedented challenges from disease,which increases cost of production and use of antibiotics,and reduces production efficiency,carcass quality,and animal wellbeing.One solution is to improve the overall resilience of pigs to a broad array of common diseases through genetic selection.Behavioral changes in feeding and drinking are usually the very first clinical signs when animals are exposed to stressors such as disease.Changes in feeding and drinking behaviors in diseased pigs may reflect the way they cope with the challenge and,thus,could be used as indicator traits to select for disease resilience.The objectives of this study were to estimate genetic parameters of feeding and drinking traits for wean-to-finish pigs in a natural polymicrobial disease challenge model,to estimate genetic correlations of feeding and drinking traits with growth rate and clinical disease traits,and to develop indicator traits to select for disease resilience.Results:In general,drinking traits had moderate to high estimates of heritability,especially average daily water dispensed,duration,and number of visits(0.44 to 0.58).Similar estimates were observed for corresponding feeding traits(0.35 to 0.51).Most genetic correlation estimates among drinking traits were moderate to high(0.30 to 0.92)and higher than among feeding traits(0 to 0.11).Compared to other drinking traits,water intake duration and number of visits had relatively stronger negative genetic correlation estimates with treatment rate and mortality,especially across the challenge nursery and finisher(−0.39 and−0.45 for treatment rate;−0.20 and−0.19 for mortality).Conclusion:Most of the recorded drinking and feeding traits under a severe disease challenge had moderate to high estimates of heritability,especially for feed or water intake duration and number of visits.Phenotypic and genetic correlations among the recorded feeding traits under disease were generally low but drinking traits showed high correlations with each other.Water intake duration and number of visits are potential indicator traits to select for disease resilience because of their high heritability and had moderate genetic correlations with treatment and mortality rates under severe disease. 展开更多
关键词 Disease resilience feeding and drinking behavior Genetic parameters PIGS
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Food and Nutritional Security in the Refugee Women’s Life Narratives
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作者 Juliana Vidal Vieira Guerra Valdecyr Herdy Alves +5 位作者 Brenda Caroline Martins da Silva Tatiana do Socorro dos Santos Calandrini Giovanna Rosario Soanno Marchiori Ediane de Andrade Ferreira Maria Bertilla Lutterbach Riker Branco Diego Pereira Rodrigues 《Food and Nutrition Sciences》 2023年第11期1031-1042,共12页
Objective: To understand, based on the life narratives of refugee women, food and nutritional security. Method: Qualitative, descriptive, exploratory study, Narratives of life method, by Daniel Bertaux. Conducted with... Objective: To understand, based on the life narratives of refugee women, food and nutritional security. Method: Qualitative, descriptive, exploratory study, Narratives of life method, by Daniel Bertaux. Conducted with 11 participants, refugee women residing in the state of Rio de Janeiro, Brazil. Results: The meanings and feelings evidenced in the life narratives of refugee women expressed the insecurities and weaknesses with food in the resettlement. Final Considerations: Given the meanings and feelings regarding food in the refuge, it is expected that the present study will contribute to the elaboration of new action plans and intersectoral public policies of agile action to meet the demands of the refugee population, in the attempt to mitigate starvation, poverty, social differences and the compromised health status of the refugee population. 展开更多
关键词 Food Security feeding behavior Refugees Human Migration Human Right to Adequate Food
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Characterization,tissue distribution,and expression of neuropeptide Yin olive flounder Paralichthys olivaceus
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作者 王倩 谭训刚 +3 位作者 杜少军 孙威 尤锋 张培军 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2015年第3期553-558,共6页
Neuropeptide Y(NPY) is a 36-amino acid peptide of the neuropeptide Y family that plays key roles in the regulation of food intake. In this study,we focused on NPY m RNA expression changes around feeding time and durin... Neuropeptide Y(NPY) is a 36-amino acid peptide of the neuropeptide Y family that plays key roles in the regulation of food intake. In this study,we focused on NPY m RNA expression changes around feeding time and during food deprivation in olive flounder. The olive flounder NPY m RNA levels were analyzed in different tissues and a high level of expression was detected in the brain. We also demonstrated a correlation between NPY expression levels in the brain and feeding schedule. NPY expression levels in olive flounder maintained on a daily scheduled feeding regimen increased shortly before feeding and decreased after the scheduled feeding time. Compared with the-1 h group before feeding,NPY expression in the 3 h group after feeding decreased significantly( P <0.05). Food deprivation led to an 81.7% decrease in NPY m RNA levels in the 24 h fasted group(P <0.05) and a 91.7% decrease in the 48 h fasted group(P <0.05). Therefore,our study demonstrates that NPY expression is associated with food intake in olive flounder. This result reveals the function of NPY in regulating food intake and its potential importance in olive flounder aquaculture. 展开更多
关键词 neuropeptide Y BRAIN FASTING olive flounder feeding behavior Paralichthys olivaceus
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Insect-specific RNA virus affects the stylet penetration activity of brown citrus aphid(Aphis citricidus)to facilitate its transmission 被引量:1
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作者 Xin An Qiaoying Gu +4 位作者 Jing Wang Tengyu Chang Wei Zhang Jin-Jun Wang Jinzhi Niu 《Insect Science》 SCIE CAS CSCD 2024年第1期255-270,共16页
Sap-sucking insects often transmit plant viruses but also carry insect viruses,which infect insects but not plants.The impact of such insect viruses on insect host biology and ecology is largely unknown.Here,we identi... Sap-sucking insects often transmit plant viruses but also carry insect viruses,which infect insects but not plants.The impact of such insect viruses on insect host biology and ecology is largely unknown.Here,we identified a novel insect-specific virus carried by brown citrus aphid(Aphis citricidus),which we tentatively named Aphis citricidus picornavirus(AcPV).Phylogenetic analysis discovered a monophyletic cluster with AcPV and other unassigned viruses,suggesting that these viruses represent a new family in order Picornavirales.Systemic infection with AcPV triggered aphid antiviral immunity mediated by RNA interference,resulting in asymptomatic tolerance.Importantly,we found that AcPV was transmitted horizontally by secretion of the salivary gland into the feeding sites of plants.AcPV influenced aphid stylet behavior during feeding and increased the time required for intercellular penetration,thus promoting its transmission among aphids with plants as an intermediate site.The gene expression results suggested that this mechanism was linked with transcription of salivary protein genes and plant defense hormone signaling.Together,our results show that the horizontal transmission of AcPV in brown citrus aphids evolved in a manner similar to that of the circulative transmission of plant viruses by insect vectors,thus providing a new ecological perspective on the activity of insect-specific viruses found in aphids and improving the understanding of insect virus ecology. 展开更多
关键词 electrical penetration graph feeding behavior insect virus transmission Picornavirales salivary protein
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