1.Dual Effects of Light on Regulating Aedes aegypti Heat-Seeking Behavior.
Haonan ZHOU ; Kai SHI ; Fengming WU ; Bingcai WANG ; Jing LI ; Bowen DENG ; Chuan ZHOU
Neuroscience Bulletin 2022;38(11):1420-1424
2.Studies on growth and intake law of Whitmania pigra with temperature.
Hong-zhuan SHI ; Fei LIU ; Qiao-sheng GUO
China Journal of Chinese Materia Medica 2006;31(23):1944-1946
OBJECTIVETo observe Whitmania pigra growth and intake law in different temperature conditions and patterns.
METHODComparison of W. pigra growth in different weight and different temperature conditions, and observe the intake law of W. pigra within 24 h.
RESULT AND CONCLUSIONThe appropriate temperature for W. pigra growth is 15 - 25 degrees C. Its largest weight of intake increas with the weight of W. pigra and temperature rise, but with the intake rate increase, individual intake reduced. W. pigra intake have the two peaks in 24 h.
Animals ; Circadian Rhythm ; Feeding Behavior ; physiology ; Leeches ; growth & development ; physiology ; Temperature
4.Effects of ration level and feeding frequency on digestibility in juvenile soft-shelled turtle, Pelodiscus sinensis.
Journal of Zhejiang University. Science. B 2006;7(7):580-585
The effects of ration level and feeding frequency on digestibility in juvenile soft-shelled turtle, Pelodiscus sinensis, were investigated. Four ration levels 1.5%, 2.5%, 4.0% and satiation (6.0% BW/d) were used. Apparent digestibility (AD) of dry matter (DMAD), protein (PAD) and protein real digestibility (PRD) were significantly affected by ration level, but not by feeding frequency when the ration level was similar. However, the feeding frequency affected the AD, DMAD, PAD and PRD significantly when the turtles were fed to satiation. The relationship between fecal protein content (Y) and protein intake (X) can be expressed as a quadric equation: Y=-0.1742+0.1476X-0.0003X(2) (r(2)=0.876, n=27, F=93.92, P<0.01).
Animal Feed
;
analysis
;
classification
;
Animals
;
Digestion
;
physiology
;
Feeding Behavior
;
physiology
;
Food Analysis
;
Food Deprivation
;
physiology
;
Periodicity
;
Turtles
;
physiology
5.Study on biological character of Hepialus introduced from Yunnan province.
Fei LIU ; Xiaoli WU ; Deli ZHANG ; Qingming LUO ; Shijiang CHEN ; Dinghua YIN ; Wei ZENG
China Journal of Chinese Materia Medica 2009;34(4):379-381
OBJECTIVETo study the biological character of Hepialus introduced from Yunnan province.
METHODH. jianchuanensis introduced from Yunnan was bred artificially to observe its biological character.
RESULTThe pupa duration was about 40 d, pupa emergence lasted for one day, female to male ratio was about 1.2:1, the mating peak was 19:30-20:30, the adults duration was about 25 d, the average life time of female was 5-6 d and that of male 6-7 d, the average number of the producing egg was about 300, the average weight of the 100 eggs was 10.33 mg. Lasting period of the larva is 350 d and the infancy larva showed the character of the polyphagy and cold endurance.
CONCLUSIONResults indicate that there are some differences in the whole duration, weight of the 100 eggs and the number of the eggs left in the abdomen between H. jianchuanensis and others bred at the Kangding base.
Animals ; Arachnid Vectors ; microbiology ; physiology ; China ; Cold Temperature ; Feeding Behavior ; physiology ; Female ; Larva ; anatomy & histology ; physiology ; Male ; Moths ; anatomy & histology ; physiology ; Oviposition ; physiology ; Ovum ; physiology ; Pupa ; physiology
6.Comparison of the effects of different growth standards on infants in Urban Shanghai: a cluster-randomized controlled trial.
Jun-Li WANG ; Jing-Qiu MA ; Ming-Yu XU ; Feng LI ; Fang REN ; Yan-Fei GUO ; Xiao-Yang SHENG
Chinese Medical Journal 2019;132(1):4-10
BACKGROUND:
The Shanghai growth standards are higher than World Health Organization (WHO) growth standards, which may influence the feeding practices of the caregivers and increase the risk of overweight in these infants. This study aimed to compare the effects of different growth standards on childhood obesity in Shanghai metropolitan area.
METHODS:
This was a cluster-randomized controlled trial conducted in 2 downtown areas with 19 community health service centers in Shanghai from November 2013 to December 2015. Randomization was done at the level of the community. Infants (health newborns) were assessed and monitored by the Shanghai growth standards (S-group) and the 2006 WHO growth standards (W-group), respectively. Measurements were taken at 1.0, 2.0, 4.0, 6.0, 9.0 and 12.0 months of age during follow-up period. Based on the values of length and weight measurements, according to the group's growth standards, doctors provided the caregivers with corresponding clinical consultation. Changes in weight-for-age z-score (WAZ), length-for-age z-score (LAZ), and weight-for length z-score (WLZ) between 2 groups were assessed using mixed regression models. Overweight was compared between 2 group at all follow-up measurements.
RESULTS:
A total of 6509 infants (52.1% were boys) were in the W-group, and 8510 infants (51.4% were boys) were in the S-group. The overweight ratios between two groups were distinct at 9 months of age (3.4% in W-group and 4.3% in S-group) and 12 months of age (2.2% in W-group and 3.8% in S-group), and the differences were statistically significant (P = 0.020 and P < 0.001, respectively). Compared to W-group, the increase in WAZ (coefficient = 0.04, P = 0.004) and WLZ (coefficient = 0.09, P < 0.001) were significantly greater, and the LAZ was lower (coefficient = -0.04, P = 0.047) in S-group (W-group values were used as reference in mixed regression models).
CONCLUSION:
Compared to the Shanghai growth standards, the adoption of WHO 2006 growth standards would reduce the risk of infant overweight in Shanghai metropolitan area up to 1 year of age.
TRIAL REGISTRATION NUMBER
ChiCTR1800015371, http://www.chictr.org.cn/ Chinese Clinical Trial Registry.
Body Height
;
physiology
;
Body Weight
;
physiology
;
China
;
Feeding Behavior
;
physiology
;
Female
;
Humans
;
Infant
;
Infant, Newborn
;
Male
;
Overweight
;
physiopathology
7.Effect of water temperature, stocking density and feeding cycle on growth of juvenile Poecilobdella manillensis.
Bo-xing CHENG ; Fei LIU ; Qiao-sheng GUO ; Hong-zhuan SHI ; Meng-meng LI ; Yu-xi LU
China Journal of Chinese Materia Medica 2015;40(6):1071-1074
The effect of water temperature, stocking density and feeding cycle on the growth of Poecilobdella manillensis juvenile was conducted P. manillensis was conducted respectively under different conditions: water temperatures(18, 22, 26, 30,34, 38 degrees C and CT), stocking density (75, 125, 200, 275, 350 individual/L) and feeding cycle(2, 4, 6, 8, 12, 16 d). After 30 days, survival rate, weight gain rate, specific growth rate were measured. There was a significant correlation between water temperature and specific growth rate (γ = -0.066x2 + 3.543 1x -38.09, R2 = 0.837 9). Based on the regression equation, the specific growth rate of P. manillensis achieved the maximum (9.461 4) at 26.84 degrees C. And the most optimal water temperature was 26-30 degrees C. Meanwhile, the survival rates of P. manillensis was 0 at 38 degrees C in 3 d. There was significant negative correlation between density and specific growth rate (γ = -0.005 7x + 9.197 3, R2 = 0.998 3) and between feeding cycle and specific growth rate (γ = -0.468 2x + 10.574, R2 = 0.998 8).
Animals
;
Annelida
;
growth & development
;
physiology
;
Body Size
;
Feeding Behavior
;
Temperature
;
Water
;
chemistry
8.Primary study of arginine as feed attractants on Whitmania pigra.
Jia WANG ; Qiao-Sheng GUO ; Hong-Zhuan SHI ; Hong LIU ; Wei-Lun QIAN ; Shu-Yu DUAN ; Tian-Hua GENG
China Journal of Chinese Materia Medica 2014;39(19):3727-3730
The effects of the feed attractants on Whitmania pigra were studied. The average weight of Wh. pigra were 5.0 g. Arginine was selected as feed attractants, xanthan gum was selected as feed substrate. The times of Wh. pigra going into the inducing room were recorded. The water temperature was 22-25 degrees C during the whole experiment. Arginine that had better inducing effect was chosen to carry on in the gradient experiment. The results showed that the best inducing effect was found when the added amount of arginine was 0.3%, which was close to the arginine content of the natural body fluid of Wh. Pigra and Bellamya purificata, 2.97 mg x g(-1).
Animal Feed
;
analysis
;
Animals
;
Arginine
;
analysis
;
metabolism
;
Body Weight
;
Feeding Behavior
;
Leeches
;
growth & development
;
physiology
9.Effects of the central amygdaloid nucleus lesions on tastants intake in rats.
Yi KANG ; Jian-qun YAN ; Tao HUANG
Chinese Journal of Applied Physiology 2004;20(3):276-279
AIMTo investigate the effects of central amygdaloid nucleus (CeA) on the evaluation of taste in rats, and explore the mechanisms of the CeA in modulating the feeding behavior.
METHODSBy using two-bottle choice test, we measured the consumption of serials concentrations of NaCl, citric acid (CA), quinine HCl (QHCl) and sucrose in bilateral CeA lesioned rats, and compared the results to those in sham lesioned rats.
RESULTSThe CeA-lesioned rats exhibited a lower preference for NaCl at concentrations of 0.03; 0.1 and 0.3 mol/L, for CA at concentrations of 0.01; 0.1 and 1.0 mmol/L, and for QHCl at 10; 20 and 50 micromol/L, but the preference for serials of concentrations of sucrose are similar between two groups. By comparing the intake of adjacent concentrations of sapid solutions, it indicated that CeA-lesioned rats showed a lower distinction between adjacent concentrations of NaCl, CA and QHCl. However, the total consumption (water and tastants) during all the test sessions was not significantly different between two groups of rats.
CONCLUSIONLesion of CeA decreases the intake of tastants solution, but the effects on different concentrations of solution are different. It suggests that the CeA plays an important role in the normal response to exteroceptive food stimuli through impacting on the assessment of taste and altering the preference threshold of gustatory stimuli.
Amygdala ; physiopathology ; Animals ; Drinking ; Electric Stimulation ; Feeding Behavior ; Male ; Pons ; Rats ; Rats, Sprague-Dawley ; Taste ; physiology
10.Interaction of olfaction and feeding behavior and its neural mechanism.
Acta Physiologica Sinica 2022;74(2):276-282
Olfaction and food intake are interrelated and regulated. In the process of feeding, the metabolic signals in the body and the feeding signals produced by food stimulation are first sensed by the arcuate nucleus of hypothalamus and the nucleus tractus solitarius of brain stem, and then these neurons project to the paraventricular nucleus of hypothalamus. The paraventricular nucleus transmits the signals to other brain regions related to feeding and regulates feeding behavior. In this process, olfactory signals can be transmitted to hypothalamus through olfactory bulb and olfactory cortex to regulate feeding behavior. At the same time, gastrointestinal hormones (ghrelin, insulin, leptin, etc.) and some neurotransmitters (acetylcholine, norepinephrine, serotonin, endocannabinoid, etc.) produced in the process of feeding act on the olfactory system to regulate olfactory function, which in turn affects the feeding itself. This review summaries the research progress of the interaction between olfaction and food intake and its internal mechanism from the aspects of neuronal and hormonal regulation.
Arcuate Nucleus of Hypothalamus/metabolism*
;
Feeding Behavior/physiology*
;
Hypothalamus
;
Paraventricular Hypothalamic Nucleus
;
Smell