The Effects of Different Feeding Practices on the Nutritional Status of Infants below 12 Months Old in the Kumba 1 Sub-Division

Appropriate feeding practices are important during infancy for good health, growth and development of infants and children. WHO revised its earlier recommendation of Exclusive Breastfeeding (EBF) of infants from 4 to 6 months of age to EBF until about 6 months of age, with the addition of complementary foods thereafter. This recommendation confirms that breast milk alone is sufficient to meet infants’ nutritional requirements for the first 6 months of life. The main objective of this study was to investigate the effect of various feeding practices on the Nutritional status of infants 0 - 12-month-old in the Kumba 1 Sub-Division. A descriptive cross-sectional study was conducted from December 2019 to August 2020. A total of 341 nursing mothers and their infants 0 - 12 months of age were recruited. Socio-demographic factors and the different feeding habits of the children were assessed using a semi-structured questionnaire. Nutritional status was assessed using anthropometric measurements. The overall proportion of infants who exclusively breastfed for 6 months was 69.2% and those who were mix-fed were 30.8% in the study area. The overall prevalence of malnutrition in the population was 61.0%. Among the malnourished children, 53.1% were underweight, 19.6% were wasted and 10.0% were stunted. Though not significant, the prevalence of wasting (21.0%) and underweight (58.3%) was higher among Mix-Fed (MF) children when compared to their EBF counterparts. Feeding practices affected the nutritional status of the infants. Underweight and wasting were observed among infants on Complementary Feeding (CF), although some exclusively breast-fed infants were stunted. Hence, nursing mothers should try as much as possible to practice EBF as recommended by WHO and can practice CF when the child is above six months.

Summary of the Best Evidence for Tube Feeding Intolerance in Critically Ill Children

Objective:To summarize the evidence of tube feeding intolerance in critically ill children,aiming to provide evidence-based information for clinical nursing staff.Methods:Evidence search was done in Chinese and English databases to guide network and professional associations at home and abroad.The search time limit was from January 2014 to January 2024,nearly 10 years of relevant literature,mainly including guidelines,consensus,expert advice,best practice,evidence summary,system evaluation,and meta-analysis.Literature quality evaluation and evidence extraction were independently performed by two researchers.Results:This paper included 13 articles,including three guidelines,three systematic evaluations,three expert opinions,and four expert consensus.Twenty-six pieces of evidence were summarized from 10 aspects of feeding intolerance definition,team building,nutritional assessment,nutritional preparation,feeding protocol,feeding route,feeding management,pipeline management,gastric residual volume,and drug application.Conclusion:This paper summarized the evidence of tube feeding intolerance in critically ill children,which can provide evidence-based information for clinical practice.The abdominal signs should be closely observed when evaluating feeding intolerance,focusing on the prevention and reduction of feeding interruption.

Early selective enteral feeding in treatment of acute pancreatitis: A case report

BACKGROUND Early initiation of enteral feeding is recognized to play a crucial role in improving the outcomes of treatment of acute pancreatitis.However,the method of adminis-tration of enteral nutrition remains debatable.We present the experience of treating a patient with moderate-severe acute pancreatitis,at high risk of progressing to a severe or fatal condition,using a novel method of selective feeding with duodenal isolation.CASE SUMMARY A 27-year-old female patient presented to the emergency unit of the hospital with a typical manifestation of acute pancreatitis.Despite a conventional treatment,the patient’s condition deteriorated by day 2 of hospitalization.Using an endoscopic approach,a novel catheter PandiCathffwas placed to the duodenum of the patient,isolating its segment between the duodenal bulb and the ligament of Treitz.In the isolated area created,a negative pressure was applied,followed by introduction of early selective enteral feeding.The patient’s condition subsequently improved in a rapid manner,and no complications often associated with moderate-to-severe acute pancreatitis developed.CONCLUSION Within 48 h of starting treatment with the novel method,it can prevent the development of multiple organ failure and,when combined with minimally invasive drainage methods,help prevent infection.

Feeding jejunostomy in post-gastrectomy nutrition management for gastric cancer

Patients undergoing gastric resection for stomach cancer are at an increased risk of malnutrition.Early postoperative enteral feeding significantly improves nu-tritional status and reduces morbidity.The use of a feeding jejunostomy in a selected group of these patients does improve the outcome.

Benefits of jejunostomy feeding in patients who underwent gastrectomy for cancer treatment

BACKGROUND Gastric cancer is associated with significant undernutrition responsible for an increase in morbidity and mortality after gastrectomy.AIM To evaluate the impact of enteral nutrition by jejunostomy feeding in patients undergoing gastrectomy for cancer.METHODS Between 2003 and 2017,all patients undergoing gastrectomy for cancer treatment were included retrospectively.A group with jejunostomy(J+group)and a group without jejunostomy(J-group)were compared.RESULTS Of the 172 patients included,60 received jejunostomy.Preoperatively,the two groups were comparable with respect to the nutritional parameters studied(body mass index,albumin,etc.).In the postoperative period,the J+group lost less weight and albumin:5.74±8.4 vs 9.86±7.5 kg(P=0.07)and 7.2±5.6 vs 14.7±12.7 g/L(P=0.16),respectively.Overall morbidity was 25%in the J+group and 36.6%in the J-group(P=0.12).The J+group had fewer respiratory,infectious,and grade 3 complications:0%vs 5.4%(P=0.09),1.2%vs 9.3%(P=0.03),and 0%vs 4.7%(P=0.05),respectively.The 30-day mortality was 6.7%in the J+group and 6.3%in the J-group(P=0.91).CONCLUSION Jejunostomy feeding after gastrectomy improves nutritional characteristics and decreases postoperative morbidity.A prospective study could confirm our results.

Heart Failure-Like Reaction Is Likely Involved in the Feeding Behaviour of Blood-Sucking Leeches

Medicinal leeches have been utilized in therapy for thousands of years. However, the adaptation physiology between leeches and hosts is not fully understand. To disclose the molecular mechanisms of adaptation between leech and host, the body transcriptomes of hunger and fed blood-sucking Poecilobdella javanica, Haemadipsa cavatuses, and Hirudo nipponia leeches were obtained by RNA sequencing, after comparison, a stratified unigenes group was obtained, which closely correlated to body distension. In the group, Rfamide receptor decreased significantly (P < 0.05) while serotonin receptor increased significantly (P < 0.05). Moreover, four KEGG (Kyoto Encyclopedia of Genes and Genomes) pathways, including cardiac muscle contraction, complement and coagulation cascades, renin-angiotensin system, and hypertrophic cardiomyopathy were significantly enriched. The unigenes annotation, neuroregulators correlation analysis and induced function of the KEGG pathways, were consistently supported the same result as: vasoconstriction and systole reaction enhance in hunger leeches and vice versa vasodilation and diastole increase in fed leeches, meanwhile, Interspecific comparison and correlative analyses of physiological function showed that the strongest reaction of induced heart failure from four KEGG occur in strongest reaction of systole in hungry P. javanica and in strongest reaction of diastole in fed H. nipponia. Overall, heart failure is likely a physiological function involved in feeding behaviour.

Feeding Practices and Use of Lysine and Methionine in Pigrationing on Intensified Pig Breeding in the West Center and Hauts Bassins Regions of Burkina Faso

The aim of the study was to assess feeding practices and the use of lysine and methionine in pig rationing on intensified and semi-intensive pig breeding in the Koudougou and Bobo-Dioulasso areas. To this end, a cross-sectional survey was carried out on 87 breeding in these towns. A Discriminant Factorial Analysis (DFA) confirming a k-means classification of the data collected was used to retain 71 breeding divided into three breeding classes: Class A (32.4% of breeding), Class B (14.08%) and Class C (53.52%). The results show that the majority of pig breeders were men between the ages of 36 and 59. Average herd sizes were 35 ± 28;79 ± 42 and 89 ± 21 pigs for Classes A, B and C respectively. The main breeds of pig found on the breeding were crossbred, Large white, local, Landrace and Duroc. Class A (26.1%), B (30%) and C (15.8%) breeders were familiar with both lysine and methionine. Class A breeders distributed feed staggered (65.2%) and in rations (34.8%). Lysine (13%) and methionine (8.7%) were purchased at 5250 FCFA/kg. Those in class B distributed feed staggered (50%) and in the form of rations (50%), in which they incorporated lysine (30%) and methionine (30%) purchased at a cost of 2500 FCFA/kg and 3000 FCFA/kg respectively. Rationing and staggered feeding were practiced by 23.7% and 76.3% of Class C breeders respectively. Only lysine purchased at 3400 FCFA/kg was incorporated into rations by 10.5% of breeders. The high cost of lysine and methionine was incriminated by Class A (100%), B (33.3%) and C (50%) breeders. In conclusion, intensive pig breeding, the practice of rationing and the incorporation of the amino acids lysine and methionine are of ascending importance from classes C, A to B. The high cost of feedstuffs, particularly lysine and methionine, compromises their use in rations, which could have a negative impact on expected breeding performance. The screening and use of feeds rich in and/or enriched with these amino acids, through the development or adaptation of technologies, could improve the efficiency of rations and the productivity of intensive pig breeding in Burkina Faso.

The Development of a Feeding Coparenting Scale for Japanese Parents of Fifth- and Sixth-Grade Elementary School Children

Aim: Recently, the role of feeding coparenting has gained attention in the child eating research field. The Feeding Coparenting Scale (FCS), a measure of how caregivers interact with their partners when feeding their children was developed in the United States in 2019. However, there is no valid and reliable measure to assess feeding coparenting among caregivers of school-aged children in Japan. Therefore, this study aimed to develop a Japanese version of the FCS (FCS-J) questionnaire for caregivers with school-aged children. Methods: This was a web-based cross-sectional survey completed by caregivers of children aged 10-12 years. A preliminary survey using interviews and a web-based survey was conducted and found that the translated items of the FCS into Japanese were understandable to Japanese people. The developed survey was administered to parents of children at an elementary school. The reliability of the survey was assessed using both test-retest reliability and internal consistency analysis. Exploratory factor analysis was used to test construct validity, and known population validity was examined in relation to attributes, marital satisfaction, and feeding tasks. Results: Findings with 135 parents of school-aged children showed good internal reliability and validity of the FCS-J. The mean score for the overall FCS-J score was 46.2 (SD = 6.2), with Cronbach’s α of 0.72. For the subscales, Cronbach’s α ranged from 0.75 to 0.79. In sum, the present study’s results support the three-factor structure of the FCS in Japanese caregivers in Japan. Conclusions: The developed FCS-J was found to have a certain degree of reliability and validity. In this study, a Japanese version of the FCS-J was developed. .

Advances in research on responsive feeding and children's eating behaviors

Background:Given that the formation of eating behaviors in childhood is largely dependent on parental feeding,it is necessary to consider eating behaviors along with feeding behaviors when exploring child nutrition.Responsive feeding can not only promote the development of self-regulation ability,prevent overweight and obesity,and develop healthy dietary behaviors but also enhance the psychosocial ability,cognitive ability,and language ability of infants.it is of great significance for the growth and development of infants to identify whether the feeding behavior of caregivers is responsive feeding as early as possible.Methods:The progress of the literature summarizes the relevant concepts,evaluation tools,and the relationship between responsive feeding and dietary behavior.Results:This is a fact that China lacks the unified response feeding definition and responsive feeding evaluation tools suitable for homes in China.The relationship between responsive feeding and dietary behavior is in the stage of infancy,and systematic response feeding and dietary behavior have not been formed.Conclusion:It is time to pay attention to the dietary behavior of Chinese children.Intervening measures such as promoting the application of responsive feeding should be actively carry out,accordingly,childhood obesity can be prevented.

Control System Development and Experimental Study on Ultrasonic Vibration Feeding

Ultrasonic vibration feeding（UVF） method which can quantitatively feed and precisely deposit fine powder is a potential technique for micro feeding.The excitation sources transmit vibration to capillary though the third medium for most UVF devices.The vibrator is directly touched with the capillary can transmit mechanical energy on the capillary as much as possible,and the powder feeding can be controlled more precise.However,there are few reports about it.A direct UVF system which integrates the function of micro feeding,process observing,and powder forming was developed in this work.In order to analyze the effect of the system factors on feeding,a group of L9（3^3） orthogonal experiments are selected to confirm the effect of level change of factors.The three factors are capillary nozzle diameter,amplitude and signal.The flow rate was stable for each combined factors,and the optimum combination for the minimum flow rate are choosing small capillary,small amplitude,and triangular wave orderly.The whole process of feeding includes start point,middle stage and stop stage.Starting of feeding was synchronized to vibration when the amplitude of capillary nozzle is larger than critical amplitude.Then,the feeding process enters the middle stage,the feeding state is observed by the CCD,and it is very stable in the middle stage.Overflow of feeding can＇t be eliminated during the stop stage.The features of the deposited powder lines are analyzed; the overflow can be diminished by choosing small capillary and appropriate ratio of the capillary nozzle diameter to the particle size.Chinese characters lattices were deposited to validate the ability of quantitatively feeding and fixed feeding of UVF.Diameters of all powder dots show normal distribution,and more than 60% dots are concentrated from 550 μm to 650 μm,and the average diameter for all the dots is 597 μm.Most dots positions are well approached to their scheduled positions,and the maximum deviation is 0.27 mm.The new direct UVF system is used to implement experiments,which confirms the precise controllable of feeding.According improve the feeding technique,it suits well for rapid prototyping,chemistry,pharmaceutics and many other fields,which require precise measurement and feed minim powder.

Effects of Different Feeding Patterns on the Growth of Micropterus salmoides

Three experimental groups with different feeding frequencies,different feeding rates and compensatory feeding were set up to study their effects on the growth of Micropterus salmoides.The results showed that different feeding rates of 2%,3%and 4%had no significant effects on the growth of M.salmoides.Therefore,before the individual weight of 50 g,the fish could be fed with a feeding rate of 4%,which could be gradually decreased to 2%in the later period.Under the condition of relatively fixed feeding rate,different feeding frequencies had an impact on the growth of M.salmoides.Under the conditions of suitable water temperature,it is reasonable to feed twice daily.The experimental fish fed for 5 d and then deprived of feed for 1 d showed fully compensatory growth,and there were no significant differences in weight gain rate,daily weight gain and specific growth rate compared with the continuous feeding group(P>0.05).Therefore,according to the feeding conditions of fish in the breeding process,stopping feeding for 1 d every 5 d could save feed and labor and improve breeding efficiency.

High Prevalence of Suboptimal Child-Feeding Practices and Child Morbidity among Families from Low Socio-Economic Urban Areas in Harare

Introduction:Optimal breastfeeding and complementary feeding have been proven to reduce malnutrition.Declining socio-economic environment is associated with poor feeding practices,high morbidity,and risk of malnutrition among children from urban poor families.Objective:The aim of this cross-sectional study was to assess child-feeding practices and morbidity prevalence among Harare urban-families living in low socio-economic areas.Methods:A health-facility based cross-sectional study was conducted in five clinics of Harare serving low socio-economic communities between July and August 2014.A structured interviewer-administered questionnaire assessing child-feeding practices was used to interview primary caregivers.Prevalence of diarrhea,influenza,malaria,measles,fever,and cough was assessed.Data were analysed using SPSS v21.Results:A total of 218 mother-child pairs attending growth monitoring were enrolled in the study:Seventy-five percent of the children were below two years;early introduction of solid foods(before six months)was observed in 81.4%of the children.Forty-nine percent of young children were fed at least four meals per day and 74%had been weaned onto family meals;Twenty-four percent of the children had diarrhea,59%influenza,1%malaria,1%measles,23%fever and 53%cough in the month preceding the survey.Conclusion:There is a high prevalence of suboptimal feeding practices and morbidity in low socio-economic urban communities of Harare.There is need to design child-feeding interventions for the urban community targeting all family members involved in decision-making.

Research on the Effect of Microbial Fermentation Feeds on Slaughter Performance and Meat Quality in Pig with Large-scale Feeding

In this paper, Duroc-lanndrae-Yorkshire crossbred piggy of born at 75 days of age, bouncing with health and similar body weight were randomly divided into experimental group （136 pigs） and control group （136 pigs）. Pigs in control group were fed with conventional diets, and 4% microbial fermentation feeds were added to the basal diet of experimental group to research on the effect of performance and meat quality of pig breeding. The results indicated that after feeding 106 d, compared to control group, the slaughter performance, meat quality and content of fatty acid and amino acid of experimental group were all better, its slaughter rate increased 1.53%, the carcass weight increased 2.75% and the backfat thickness decreased 0.02 cm. In addition, the pork meat in test group hadn＇t antibiotic and heavy metal residues, while it had higher color score, lower pH45min and pH24h value, better tenderness and rate of cooked meat and higher content of fatty acids, polyunsaturated fatty acids and amino acids. Microbial fermentation feed using in test group can significantly improved the flavor and aroma of pork, and eating this pork conducive more to human health. Thus, the application of microbial fermenta- tion feed can provide a more safe, healthy and nutritious flavor pork for human beings.

Effects of salinity on growth and feeding of juvenile Starry flounder (Platichthys stellatus)

The survival rate, feeding, growth of juvenile Starry flounder were studied at different salinities. The results showed that when the fish was directly translated from salinity of 32 to 0 and more than 0, the survival rate was 100% in 96 hours. If the fish was acclimatized, it was still 100% in 42 days. The fish at the salinity of 0 - 16 grew faster than others; feeding rate varied as salinity changed, and the highest one was at salinity of 32 and the lowest one was at the salinity of 16. As to feed conversion efficiency, the highest one was at the salinity of 16, and the lowest one was at the salinity of 24. There were no significant differences among the treatments （P＆gt;0.05）. It was found that low salinity benefited for recovering albinism.

Gastroenteric tube feeding: Techniques, problems and solutions

Gastroenteric tube feeding plays a major role in the management of patients with poor voluntary intake,chronic neurological or mechanical dysphagia or gut dysfunction,and patients who are critically ill.However,despite the benefits and widespread use of enteral tube feeding,some patients experience complications.This review aims to discuss and compare current knowledge regarding the clinical application of enteral tube feeding,together with associated complications and special aspects.We conducted an extensive literature search on PubMed,Embase and Medline using index terms relating to enteral access,enteral feeding/nutrition,tube feeding,percutaneous endoscopic gastrostomy/jejunostomy,endoscopic nasoenteric tube,nasogastric tube,and refeeding syndrome.The literature showed common routes of enteral access to include nasoenteral tube,gastrostomy and jejunostomy,while complications fall into four major categories:mechanical,e.g.,tube blockage or removal;gastrointestinal,e.g.,diarrhea;infectious e.g.,aspiration pneumonia,tube site infection;and metabolic,e.g.,refeeding syndrome,hyperglycemia.Although the type and frequency of complications arising from tube feeding vary considerably according to the chosen access route,gastrointestinal complications are without doubt the most common.Complications associated with enteral tube feeding can be reduced by careful observance of guidelines,including those related to food composition,administration rate,portion size,food temperature and patient supervision.

Research Advances in Gene Regulation and Genetic Improvement of Fish Feeding

Feeding habit which is regulated by many factors including the intrinsic and external factors, such as appetite, structure of the digestive tract and feed palatability, is an important content in the study of genetic improvement. The genetic regulation is one of the major parts among the researches. This research reported the progress of the polymorphism of genes associated with appetite and its correla- tion with feeding habits, and summarized the studies on improvements of fish feed- ing and protein sources of the artificial feeding in order to provide theoretic basis for cultivating the improved varieties in feeding habit.

Implementation of enteral feeding protocol in an intensive care unit: Before-and-after study

AIM To determine the effects of implementing an enteral feeding protocol on the nutritional delivery and outcomes of intensive care patients.METHODS An uncontrolled, observational before-and-after study was performed in a tertiary mixed medical-surgical intensive care unit(ICU). In 2013, a nurse-driven enteral feeding protocol was developed and implemented in the ICU. Nutrition and outcome-related data from patients who were treated in the study unit from 2011-2012(the Before group) and 2014-2015(the After group) were obtained from a local electronic database, the national Population Registry and the hospital's Infection ControlService. Data from adult patients, readmissions excluded, who were treated for at least 7 d in the study unit were analysed. RESULTS In total, 231 patients were enrolled in the Before and 249 in the After group. The groups were comparable regarding demographics, patient profile, and severity of illness. Fewer patients were mechanically ventilated on admission in the After group(86.7% vs 93.1% in the Before group, P = 0.021). The prevalence of hospitalacquired infections, length of ICU stay and ICU, 30-and 60-d mortality did not differ between the groups. Patients in the After group had a lower 90-d(P = 0.026) and 120-d(P = 0.033) mortality. In the After group, enteral nutrition was prescribed less frequently(P = 0.039) on day 1 but significantly more frequently on all days from day 3. Implementation of the feeding protocol resulted in a higher cumulative amount of enterally(P = 0.049) and a lower cumulative amount of parenterally(P < 0.001) provided calories by day 7, with an overall reduction in caloric provision(P < 0.001). The prevalence of gastrointestinal symptoms was comparable in both groups, as was the frequency of prokinetic use. Underfeeding(total calories < 80% of caloric needs, independent of route) was observed in 59.4% of the study days Before vs 76.9% After(P < 0.001). Inclusion in the Before group, previous abdominal surgery, intraabdominal hypertension and the sum of gastrointestinal symptoms were found to be independent predictors of insufficient enteral nutrition.CONCLUSION The use of a nurse-driven feeding protocol improves the delivery of enteral nutrition in ICU patients without concomitant increases in gastrointestinal symptoms or intra-abdominal hypertension.

Multi-center Study of Enteral Feeding Practices in Hospitalized Late Preterm Infants in China

Objective To investigate the current enteral feeding practices in hospitalized late preterm infants in the Beijing area of China. Methods A multi-center, cross-sectional study was conducted. Infants born after 34 weeks and before 37 weeks of gestation were enrolled from 25 hospitals in the Beijing area of China from October 2015 to October 2017. Data on enteral feeding practices were collected and analyzed. Results A total of 1,463 late preterm infants were enrolled, with a mean gestational age（GA） of 35.6（34.9, 36.1） weeks. The percentage of exclusive breastfeeding was 4.5% at the initiation of enteral feeding but increased to 14.4% at discharge. When human milk was not available, most infants（46.1%） were fed with preterm infant formula. The rate of exclusive human milk feeding in infants born at 34 weeks gestation was higher than at discharge（21.1% of infants born at 34 weeks＇ GA versus 12.1% of infants born at 35 weeks＇ GA versus 12.3% of infants born at 36 weeks＇ GA, P 〈 0.001）. Only 28.4% of late preterm infants achieved full enteral feeding at discharge, and only 19.2% achieved 120 kcal/（kg·d） by enteral feeding at discharge. Importantly, 40.5% of infants did not regain the birth weight at discharge. Conclusion Enteral feeding support of late preterm infants has not been standardized to achieve optimal growth. Moreover, the human milk feeding rate was low, and many late preterm infants did not achieve the goal of enteral feeding and failed to regain birth weight at the time of discharge. More aggressive enteral feedings protocols are needed to promote human milk feeding and optimize growth for late preterm infants.

Factors affecting breastfeeding duration in Greece:What is important?

AIM:To investigate factors associated with breastfeeding duration(BD) in a sample of mothers living in Greece.METHODS:Four hundred and twenty-eight mothers(438 infants) were initially recruited in a tertiary University Hospital.Monthly telephone interviews(1665in total) using a structured questionnaire(one for each infant) were conducted until the sixth postpartum month.Cox regression analysis was used to assess factors influencing any BD.RESULTS:Any breastfeeding rates in the first,third,and sixth month of the infant's life reached 87.5%,57.0%and 38.75%,respectively.In the multivariate analysis,maternal smoking in the lactation period[hazard-ratio(HR) = 4.20]and psychological status(HR = 1.72),and the introduction of a pacifier(HR =2.08),were inversely associated,while higher maternal education(HR_(university/college vs primary/high school) = 0.53,HR_(master's vs primary/high school) = 0.20),and being an immigrant(HR = 0.35) were positively associated with BD.CONCLUSION:Public health interventions should focus on campaigns against smoking during lactation,target women of lower educational status,and endorse the delayed introduction of pacifiers.

Long-term monitoring of the individual self-feeding behavior of rainbow trout Oncorhynchus mykiss

Self-feeding device is extensively used in aquaculture farms, but for salmonids the individual feeding behavior has seldom been continuously observed. In this article, the individual self-feeding behavior of 10 rainbow trout was continuously monitored with a PIT tag record for 50 days with three replicates. The?sh fell into three categories according to their feeding behavior, i.e. high triggering ?sh(trigger behavior more than 25% of the group, HT), low triggering ?sh(1%–25%, LT) and zero triggering ?sh(less than1%). The results showed that in a group of 10 individual 1–2 HT ?sh accounted for most of the self-feeding behavior(78.19%–89.14%), which was far more than they could consume. The trigger frequency of the?sh was signi?cantly correlated with the initial body weight( P <0.01), however, no signi?cant dif ference in growth rate among the HT, LT, and ZT ?sh was observed( P >0.05). Cosinor analysis showed that the two HT ?sh in the same group had similar acrophase. Though some of the HT ?sh could be active for 50 d, there were also HT ?sh decreased triggering behavior around 40 d and the high trigger status was then replaced by other ?sh, which was ?rst discovered in salimonds. Interestingly, the growth of the group was not af fected by the alternation triggering ?sh. These results provide evidence that in the self-feeding system the HT ?sh didn't gain much advantage by their frequent self-feeding behavior, and high trigger status of the HT ?sh is not only an individual character but also driven by the demand of the group. In the self-feeding system, the critical individual should be closely monitored.