scholarly journals Products of Solid-Phase Probiotic Bacilli Fermentation Increase Food Conversion Efficiency and Stimulate Chicken Growth

2018 ◽  
Vol 14 (4) ◽  
pp. 262-271
Author(s):  
Mazanko Maria S. ◽  
Aleksandr I. Klimenko ◽  
Ivan F. Gorlov ◽  
Alexander V. Usatov ◽  
Zoya B. Komarova ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Solid Phase ◽  
Food Conversion ◽  
Food Conversion Efficiency

Effects of chronic ammonia exposure on growth and food conversion efficiency in juvenile spotted wolffish

Aquaculture ◽  
2003 ◽  
Vol 228 (1-4) ◽  
pp. 215-224 ◽  
Author(s):  
Atle Foss ◽  
Tor H. Evensen ◽  
Tone Vollen ◽  
Victor Øiestad
Keyword(s):  
Conversion Efficiency ◽  
Food Conversion ◽  
Spotted Wolffish ◽  
Ammonia Exposure ◽  
Food Conversion Efficiency

Breed and sex differences in equally mature sheep and goats 1. Growth and food intake

1987 ◽  
Vol 45 (2) ◽  
pp. 239-260 ◽  
Author(s):  
M. L. Thonney ◽  
St C. S. Taylor ◽  
T. H. McClelland
Keyword(s):  
Food Intake ◽  
Conversion Efficiency ◽  
Mammalian Species ◽  
The Body ◽  
Food Conversion ◽  
Size Scaling ◽  
Daily Food ◽  
Fleece Weight ◽  
Mature Size ◽  
Food Conversion Efficiency

ABSTRACTGenetic size-scaling accounts for most of the variation found among mammalian species in food intake and growth rate, with food conversion efficiency independent of the body size of the species. Is the same true of breeds and strains within species?Animals from Soay, Welsh Mountain, Southdown, Finish Landrace, Jacob, Wiltshire Horn and Oxford Down sheep breeds and from a breed of feral goats were grown to 0·40, 0·52, 0·64 or 0·76 of the mean mature weight of their breed and sex. Food was offered ad libitum and individually recorded.Allometric growth coefficients were obtained for fleece weight, femur weight and femur length. Fleece was late maturing and femur early.Breed and sex size-scaling coefficients, obtained by regression of breed and sex means on mature size, were similar to those found at the species level for age from conception to slaughter, time taken to mature and food conversion efficiency. Coefficients were higher than expected for total and daily food consumption, especially at early stages of maturity. Most breed coefficients were close to expectation while sex coefficients were somewhat higher than expected.There were significant breed deviations: Welsh Mountain, Oxford Down and probably Soay sheep required less time and Jacob sheep and feral goats required more time to mature than expected from differences in mature size. Soay and Welsh Mountain sheep appeared to be more efficient and feral goats and Jacob sheep less efficient food converters over the same maturity interval.

scholarly journals NUMERICAL RESPONSE AND EFFICIENCY OF CONVERSION OF INGESTED FOOD OF PREDATOR Dicrodiplosis manihoti Harris, (DIPTERA : CECIDOMYIIDAE) FOR EGGS DENSITIES OF MEALY BUG Planococcus citri (Risso),(HEMIPTERA :PSEUDOCOCCIDAE) .

2017 ◽  
Vol 48 (2) ◽  
Author(s):  
Al-Zubaidy & Al-Shammari
Keyword(s):  
Conversion Efficiency ◽  
Egg Production ◽  
Prey Density ◽  
Total Duration ◽  
Numerical Response ◽  
Planococcus Citri ◽  
Food Conversion ◽  
High Significance ◽  
Larval Stages ◽  
Food Conversion Efficiency

The results of numerical response showed to increasing rates of egg production for the predator female with prey density increases, noting of a positive correlation between the number of eggs lying by the female predator and prey density, Being 7, 13.1, 17 and 30 eggs/female during her life when making egg densities of prey 10, 20, 40 and 60 eggs/day during the period of development of Larval ages respectively.  Statistical analysis results have pointed to the moral differences between those rates at 0.05 probability level. Food conversion efficiency was marked by ECI also increases with increasing density of prey . Food conversion efficiency to  eggs by female predator increased  in high densities of prey compared with low  densities as well as reduced food efficiency with increasing density of prey  where when lying densities and decreased when high densities prey. It also shortened the duration of phases three predator when prey density increases amounting to (2.74, 3.37, 9.15) and(1.62, 4.32, 5.04), (1.86, 2.82, 4.07) and (1.16 , 2.89, 3.42) consecutive days so that the total duration of Larval stage 15.26, 10.98, 8.75 and 7.47 days respectively with high significance deference. As well as high rates of predation 80, 74.24, 96.52 and 116.91 egg respectively and moral difference in egg consumption rates between larval stages as well as during the period of Larval stages  at probability 0.05.  survival rates also increased  for the  larval, pupal  and   adults stages  when the density of the prey increased  with high  significance  difference.

Countergradient variation in growth and food conversion efficiency of juvenile turbot

2000 ◽  
Vol 57 (5) ◽  
pp. 1213-1226 ◽  
Author(s):  
A. K. Imsland ◽  
A. Foss ◽  
G. Nevdal ◽  
T. Cross ◽  
S. W. Bonga ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Food Conversion ◽  
Countergradient Variation ◽  
Juvenile Turbot ◽  
Food Conversion Efficiency

A comparison of the feeding value of maize and sorghum for fattening pigs

1964 ◽  
Vol 6 (3) ◽  
pp. 357-362 ◽  
Author(s):  
F. X. Vanschoubroek ◽  
R. L. Van Spaendonk ◽  
W. Nauwynck
Keyword(s):  
Weight Gain ◽  
Conversion Efficiency ◽  
Live Weight ◽  
Net Energy ◽  
Food Conversion ◽  
Sorghum Vulgare ◽  
Feed Value ◽  
Feeding Value ◽  
Fattening Pigs ◽  
Food Conversion Efficiency

Six comparable groups, each of 4 castrate pigs, were used to compare the feed value of maize and sorghum as estimated by live-weight gain, food conversion efficiency, slaughter quality and ham composition.The maize ration contained 40% yellow maize and the sorghum ration 40% Sorghum vulgare subglabrescens, all other ingredients being the same for both diets.No statistically significant differences were found between the maize and sorghum pigs with regard to the criteria mentioned.It is concluded that no difference exists between the feed value of the maize and the sorghum used. This result is in better agreement with the net energy values of maize and sorghum as calculated by the formula of Hoff-mann and digestion coefficients for pigs, than with “classical” starch equivalents.

OPTIMAL HARVEST SIZE IN SHRIMP CULTURES

Crustaceana ◽  
1999 ◽  
Vol 72 (3) ◽  
pp. 297-306 ◽  
Author(s):  
Dirk Spaargaren
Keyword(s):  
Conversion Efficiency ◽  
Stocking Density ◽  
Food Product ◽  
Optimal Size ◽  
Price Ratio ◽  
Food Conversion ◽  
Product Price ◽  
Waste Products ◽  
Optimal Harvest ◽  
Food Conversion Efficiency

AbstractMany factors (e.g., food conversion efficiency, stocking density, harvest size, product value and food value) determine the economic profitability of shrimp cultures. Food conversion efficiency (FCE) and body size are negatively related. During ontogenetic development, the efficiency with which animals convert ingested food into body mass gradually declines, either by a less efficient digestion or by a less efficient incorporation of digested material. Food intake increases with increasing body weight, while food conversion efficiency decreases; at intermediate body sizes the conversion of food to biomass reaches a maximum. The optimal size for harvesting depends on the food/product price ratio. Cultivation can only be profitable when FCE is at least higher than the food/product price ratio (Vf/Vp). Equations are derived giving the daily profit of a culture cycle, in relation to the various variables involved. From these the optimal harvest weight can be assessed. Food conversion efficiency and optimal harvest weight are physiologically determined but can markedly be increased by improved food quality (affecting FCE), additional oxygen supply, and removal of metabolic waste products (affecting maximal stocking densities). A cultured species should reach a marketable size long before it reaches its maximal size, viz., before food conversion efficiency drops to low values. De nombreux facteurs (par ex., l'efficacite d'utilisation de l'aliment, la densite du stock, la taille de recolte, la valeur du produit et la valeur nutritionnelle) determinent le benefice economique des elevages de crevettes. L'efficacite d'utilisation de l'aliment (FCE) et la taille du corps sont correlees negativement. Au cours du developpement ontogenique, l'efficacite avec laquelle les animaux transforment la nourriture ingeree en masse corporelle diminue graduellement, soit en raison d'une digestion moins efficace, soit par une assimilation moins efficace du materiel digere. La prise de nourriture augmente en meme temps que le poids du corps tandis que l'efficacite de conversion de la nourriture diminue; a des tailles intermediaires, la conversion de la nourriture en biomasse atteint un maximum. La taille optimale pour la recolte depend du rapport prix de la nourriture/prix du produit (Vf/Vp). L'elevage est seulement rentable quand FCE est au moins superieur a ce dernier rapport (Vf/Vp). Des equations en sont tirees, indiquant le profit journalier d'un cycle d'elevage, en fonction des diverses variables impliquees. On peut en deduire le poids optimal de recolte. L'efficacite de transformation de la nourriture et le poids optimal de recolte sont determines physiologiquement mais peuvent etre augmentes de facon marquee par une qualite de nourriture amelioree (affectant FCE), un apport supplementaire en oxygene et l'elimination des dechets du metabolisme (affectant les densites maximales du stock). Une espece d'elevage devrait atteindre une taille commercialisable longtemps avant qu'elle n'atteigne sa taille maximale, c'est a dire, avant que l'efficacite de conversion de la nourriture ne diminue trop.

Sign in / Sign up

Export Citation Format

Share Document