scholarly journals Glass eels (Anguilla anguilla) growth in a recirculating system

2005 ◽  
Vol 6 (1) ◽  
pp. 99 ◽  
Author(s):  
P. ANGELIDIS ◽  
I. POURNARA ◽  
G. PHOTIS
Keyword(s):  
Body Weight ◽  
Physicochemical Parameters ◽  
Anguilla Anguilla ◽  
Conversion Ratio ◽  
High Variability ◽  
Fish Feed ◽  
Food Conversion ◽  
Recirculation System ◽  
Glass Eels ◽  
Individual Body

On a commercial eel farm, which uses a recirculation system, 400,000 glass eels were farmed for a period of 328 days at 20o – 23o C. The physicochemical parameters of the farm water were kept at normal conditions during the experiment. The NO 2 was kept between 1.0 and 3.0 mg/l. By the end of the experiment, 4,582 kg of fish feed were consumed and 2,939 kg of eels were produced (177,523 eels with mean final individual body weight of 16.6g and mean food conversion ratio of 1.625). The glass eels showed a high variability in their capacity to grow.

scholarly journals Penggunaan Tepung Buah Pepaya Carica papaya L Dalam Pelet Terhadap Efek Pertumbuhan Benih Ikan Nila Oreochromis niloticus

2018 ◽  
Vol 6 (1) ◽  
Author(s):  
Herol A. Tulung ◽  
Cyska Lumenta ◽  
Edwin L.A. Ngangi
Keyword(s):  
Feed Efficiency ◽  
Conversion Ratio ◽  
Fish Feed ◽  
Food Conversion ◽  
Daily Growth ◽  
Relative Growth ◽  
Food Conversion Ratio ◽  
Randomized Design ◽  
Absolute Growth ◽  
Different Doses

This study aimed to determine the effect of papaya flour at different doses on absolute  growth, daily growth, relative growth, feed efficiency, and food conversion. The treatments consisted of 0,  2.5%, 7.5%, 10% of papaya flour respectively, each with three replcations. The weight of fish were  about 18-23.58 g.  The fish were placed in aquaria with a density of  10 individual per aquarium. The experiment design is a complete randomized design. The results of analysis show that the treatments had no significant effect on growth, daily growth, relative growth, feed  efficient, and food conversion ratio. However, treatment C (7.5% papaya flour) gave the best on growth of fish, feed efficiency and food conversion ratio.

Physical form and energy concentrations of broiler diets

1972 ◽  
Vol 12 (59) ◽  
pp. 604 ◽  
Author(s):  
WJ Yule
Keyword(s):  
Body Weight ◽  
Food Consumption ◽  
Energy Content ◽  
Conversion Ratio ◽  
Metabolizable Energy ◽  
Controlled Environment ◽  
Dietary Energy ◽  
Food Conversion ◽  
Floor Space ◽  
Physical Form

Commercial broilers were reared in controlled environment houses to nine weeks of age at 464 cm2 of floor space per bird. The treatments over the starter and finisher phases were two metabolizable energy concentrations of 11.5 and 13.2 MJ kg-1 each in either mash or pelleted form with a commercial pellet treatment as a control. Dietary energy content was negatively correlated with food conversion ratio but did not significantly influence liveweight. Pelleting significantly increased liveweight and improved food efficiency. There was no evidence of an interaction between dietary energy content and physical form of the diet. The increased cost of the higher energy diet counterbalanced the decreased food consumption per unit of body weight.

scholarly journals EFFECT OF STOCKING DENSITY ON GROWTH PERFORMANCE OF DOMESTICATED BARB (Barbonymus balleroides)

2017 ◽  
Vol 12 (1) ◽  
pp. 1
Author(s):  
Otong Zenal Arifin ◽  
Jojo Subagja ◽  
Vitas Atmadi Prakoso ◽  
Endang Haris Suhud
Keyword(s):  
Body Weight ◽  
Survival Rate ◽  
Stocking Density ◽  
Conversion Ratio ◽  
Food Conversion ◽  
Daily Growth ◽  
Food Conversion Ratio ◽  
Best Value ◽  
Growth Performances ◽  
Dimension 2

Barb (Barbonymus balleroides) considerably has economic potential as aquaculture commodity. However, there was still lack of development on aquaculture for this species. This study was conducted to observe the effect of different stocking density on growth of barb. The fish (body weight: 14.89 ± 0.13 g) were stocked in nine floating nets (dimension: 2 m x 2 m x 1 m) inside the concrete ponds with three stocking density treatments (10, 15, and 20 fish/m3). Each treatment consisted of three replications. Fish were fed on commercial pellet (30% of crude protein) as much as 3% of the biomass per day with twice a day of feeding frequency. Data of growth performances (body weight, specific growth rate, average daily growth, biomass, food conversion ratio, and survival rate) were collected every 30 days during 90 days of rearing period. Water quality variables (temperature, pH, and dissolved oxygen) were observed during experiment. The results showed that the optimal stocking density for the growth of barb was 10 fish/m3. Best value of food conversion ratio was found 10 fish/m3 compared with 15 and 20 fish/m3 (P<0.05). Meanwhile, there were no significant differences on survival rate between treatments. These results also showed the potential of rearing barb on culture ponds with appropriate stocking density.

scholarly journals Food conversion is transiently affected during 4-week chronic administration of melanocortin agonist and antagonist in rats

2002 ◽  
Vol 173 (3) ◽  
pp. 517-523 ◽  
Author(s):  
L Jonsson ◽  
JO Skarphedinsson ◽  
GV Skuladottir ◽  
H Watanobe ◽  
HB Schioth
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Chronic Administration ◽  
Conversion Ratio ◽  
Melanocortin Receptor ◽  
Food Conversion ◽  
Melanocortin System ◽  
Intracerebroventricular Infusion ◽  
Food Conversion Ratio ◽  
Melanocortin 4 Receptor

The central melanocortin system is involved in the regulation of food intake and body weight. In this study, we investigated the effect of a 4-week intracerebroventricular infusion of the melanocortin receptor agonist MT-II and the selective melanocortin-4 receptor antagonist HS024 on food intake and body weight homeostasis. The MT-II-treated rats ate less and lost considerably more weight than the control rats during the first week of treatment. During the second and third week, they gained weight and, by the end of the treatment period, the weight gain was similar to that of the control rats. The HS024 treatment caused hyperphagia and development of obesity during the entire period. Extensive accumulations of fat and a sixfold increase in leptin levels were observed in the HS024-treated rats, as compared with controls, after the 4-week period. Food conversion ratio, defined as body weight increase relative to weight of ingested food, was clearly increased in the HS024-treated rats, while it was lowered in the MT-II-treated rats compared with controls. The effect on food conversion ratio was transient, being greatest for both experimental groups during the first week and it was then attenuated to reach the level of controls at the end of the study. The results suggest that long-term injection of exogenous melanocortin receptor active substances may have an important transient effect on food conversion.

Selection for rate and efficiency of lean gain in Hereford cattle. 2. Evaluation of correlated responses

1990 ◽  
Vol 51 (1) ◽  
pp. 35-46 ◽  
Author(s):  
R. A. Mrode ◽  
C. Smith ◽  
R. Thompson
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Conversion Ratio ◽  
Food Conversion ◽  
Correlated Responses ◽  
Selected Lines ◽  
Female Progeny ◽  
Food Conversion Ratio ◽  
Hereford Cattle ◽  
Selection For

ABSTRACTCorrelated responses in two lines of Hereford cattle selected for lean growth rate (LGR) from birth to 400 days of age and lean food conversion ratio (LFCR) from 200 to 400 days of age for a period of 8 years were evaluated. Correlated changes were estimated by two methods: deviation of selected lines from a control line and restricted maximum likelihood. Generally, estimates from the two methods were similar but tended to be more precise for the latter. Statistically significant correlated responses occurred in growth rate in the LGR line and in lean proportion and food conversion ratio in both selected lines. Selection for LGR was accompanied by increases in body weight at various ages in both male and female progeny. In the LFCR line there were little or no changes in body weight for male calves but some increases at certain ages for female progeny. There were no adverse correlated responses detected in reproductive traits such as calving difficulty and calving and pre-weaning mortality.

scholarly journals Pengaruh Pemberian Pakan Komersial yang Berbeda pada Pertumbuhan Ikan Nila Oreochromis niloticus

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Martha F Hamadi ◽  
Julius Sampekalo ◽  
Sartje Lantu
Keyword(s):  
Nile Tilapia ◽  
Conversion Ratio ◽  
Fish Growth ◽  
Fish Feed ◽  
Food Conversion ◽  
Food Treatment ◽  
Relative Growth ◽  
Food Conversion Ratio ◽  
Randomized Design ◽  
Absolute Growth

This research intended to study the growth of nile tilapia and commercial food conversion.  The research was conducted at Laboratory of Nutrition and Fish Feed Technology, Faculty of Fisheries Sam Ratulangi University Manado.  Fish feed used were Comfeed (Treatment A), Bintang (Treatment B) dan Lokal Food  (Treatment C).  Feeding dosage was 5% per body weight per day and feeding frequency was three times a day.  The research used complete randomized design with three treatments each with three replications. Research results showed that treatment A had absolute growth 257,67 g, , relative growth 160,37% and food conversion ratio 1,81 while treatment B had absolute growth 240,67 g, relative growth 152,05% and FCR 2.36,   and treatment C 235,00 g absolute growth, relative growth 147,04% and FCR 2.41.  Statistic analysis found  abosolute growth of fish in treatment A different significantly compared to treatment B and C.   Treatment A and B had similar effect but different significantly compared to treatment C.  It could be concluded that the use of comfeed was better to increase fish growth and FCR as compared to treatment B and C.   Keywords: growth, nile tilapia, food conversion ratio, commercial feed

scholarly journals Beneficial Effect of Bidens pilosa on Body Weight Gain, Food Conversion Ratio, Gut Bacteria and Coccidiosis in Chickens

PLoS ONE ◽  
2016 ◽  
Vol 11 (1) ◽  
pp. e0146141 ◽  
Author(s):  
Cicero L. T. Chang ◽  
Chih-Yao Chung ◽  
Chih-Horng Kuo ◽  
Tien-Fen Kuo ◽  
Chu-Wen Yang ◽  
...  
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Beneficial Effect ◽  
Body Weight Gain ◽  
Conversion Ratio ◽  
Gut Bacteria ◽  
Food Conversion ◽  
Bidens Pilosa ◽  
Food Conversion Ratio

scholarly journals Growth of Fry Fish of 4 Species of Family Mugilidae in Experimental Recirculation Water System

2020 ◽  
Vol 1 (4) ◽  
Author(s):  
George Nick Hotos ◽  
Despina Avramidou
Keyword(s):  
Growth Performance ◽  
Condition Factor ◽  
Water System ◽  
Conversion Ratio ◽  
Mugil Cephalus ◽  
Food Conversion ◽  
Protein Food ◽  
Liza Aurata ◽  
Recirculation System ◽  
Of Greece

The collected in nature fry of Mugil cephalus, Liza aurata, L. ramada and Chelon labrosus that arrive in massive schools at the coastline of Greece were reared in small aquaria (50 L) of a recirculation system from the size of about 3.0 cm TL (50 fish per aquarium), using brackish (15 ppt) water and artificial high protein food. It was found that for a period of 80 days, growth performance was high at 23 oC, reaching values for weight increase between 592 (M. cephalus) and 2281 % (L. aurata). Food Conversion Ratio (FCR) was best (1.04) for L. aurata and worst (2.04) for M. cephalus. All species responded well as exhibited by an increase in their Condition Factor (CF) and mortality was almost absent.

Partition of food intake between maintenance and gain among bovine sex phenotypes

1987 ◽  
Vol 44 (2) ◽  
pp. 209-217 ◽  
Author(s):  
T. W. Gettys ◽  
D. M. Henricks ◽  
P. M. Burrows ◽  
B. D. Schanbacher
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Gain Coefficient ◽  
High Energy ◽  
Conversion Ratio ◽  
Food Conversion ◽  
Food Conversion Ratio ◽  
Common Weight ◽  
Least Squares Estimates ◽  
The Relationship

ABSTRACTFour groups of calves (10 bulls, 10 steers, 10 heifers and 10 ovariectomized heifers) of Simmental- Hereford breeding were individually given a high-energy diet from 10 to 16 months of age. At the end of the experiment, the 9-10-11th rib section was dissected into fat, lean and bone and chemical analysis was performed on the dissected soft tissue. For each group, the relationship between food intake and change in body weight was examined by a method designed to separate intake into its simultaneous maintenance and gain components: least-squares estimates for the maintenance coefficient (βm, kg/day per kg body weight) and the gain coefficient (βg, kg food per kg gain) were obtained for each animal. Conventional measures of food conversion ratio (kg food per kg gain) were examined on both common age and common weight-gain bases. Bulls, followed by steers, accumulated the most lean and least fat while heifers and ovariectomized heifers accumulated the least lean and most fat. Maintenance coefficients (βm) were lower in males than in females but did not differ within gender. Gain coefficients (βg) did not differ among the groups, although the coefficients appeared to be similar within gender. Food conversion ratio computed over a common age interval did not differ among groups. Food conversion ratio computed over common weight intervals was lowest in bulls followed in increasing order by steers then the two female groups. It is concluded that males grow more efficiently than females while accumulating more lean and less adipose tisue and that this greater efficiency is achieved by consuming less food per unit of body weight for maintenance, leaving proportionately more of the total intake available for gain.

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