Growth energetics of juvenile herring, Clupea harengus  L.: food conversion efficiency and temperature dependency of metabolic rate

2012 ◽  
Vol 29 (2) ◽  
pp. 331-340 ◽  
Author(s):  
M. Bernreuther ◽  
J.-P. Herrmann ◽  
M. A. Peck ◽  
A. Temming
Keyword(s):  
Metabolic Rate ◽  
Conversion Efficiency ◽  
Clupea Harengus ◽  
Temperature Dependency ◽  
Food Conversion ◽  
Food Conversion Efficiency

Estimation by Use of Field Weighings of Metabolic Rate and Food Conversion Efficiency in Albatross Chicks

The Auk ◽  
1984 ◽  
Vol 101 (4) ◽  
pp. 790-795 ◽  
Author(s):  
C. Ricketts ◽  
P. A. Prince
Keyword(s):  
Weight Loss ◽  
Simple Model ◽  
Metabolic Rate ◽  
Conversion Efficiency ◽  
Growth Period ◽  
Growth Strategies ◽  
Food Conversion ◽  
Preliminary Results ◽  
Metabolic Costs ◽  
Food Conversion Efficiency

Abstract A knowledge of the assimilation of food and of the energetic demands of chicks at different stages in the growth period can provide a basis for understanding growth strategies of seabirds. We have developed a simple model of chick weight loss between feeds that allows an estimation of metabolic costs and food-conversion efficiency in albatross chicks. The data required to provide these estimates are a series of frequent weights of a chick following a meal and the weight of food delivered in the meal. Preliminary results show a considerable variation in both food-conversion efficiency, which may reflect variation in the composition of meals delivered to chicks, and in the metabolic demands of individual chicks.

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.

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