Voluntary food intake in relation to body weight among British breeds of cattle

1986 ◽  
Vol 42 (1) ◽  
pp. 11-18 ◽  
Author(s):  
St C. S. Taylor ◽  
A. J. Moore ◽  
R. B. Thiessen
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Linear Regression ◽  
Regression Coefficient ◽  
Natural Logarithm ◽  
The Mean ◽  
Voluntary Intake ◽  
Relationship Of ◽  
The Relationship ◽  
Voluntary Food Intake

ABSTRACTVoluntary food intake and body weight were examined over 4-week intervals between 14 and 70 weeks of age in 306 females from 25 British breeds of cattle. At each age, the relationship of the natural logarithm of voluntary food intake to that of body weight was examined by linear regression both within and between breeds.Of the total variation in voluntary food intake, the proportion accounted for by body weight was extremely high between breeds (phenotypically, 0·80 or more; genetically 0·88 or more, at most ages) but phenotypically low within breeds (0·33 or less). The mean voluntary intake of a breed at any age could be predicted from its mean body weight at the same age with a coefficient of variation (CV) among breeds that declined with age from 0·08 to 0·04. Within breeds, the corresponding CV for individual intake was between 0·12 and 0·15 beyond 9 months of age, and even higher at early ages.Within breeds, the regression coefficient of log intake on log body weight was close to the value of 0·7 at all ages. Between breeds, it was over 0·8 at early ages, declining to about 0·7 beyond 1 year of age. Thus, genetically larger breeds voluntarily consumed relatively more food at early ages compared with later ages. Breed size should therefore be taken into account when recommending food intake requirements. Breed deviations for high and low appetite are discussed.

scholarly journals KARAKTERISTIK MORFOMETRIK DAN FAKTOR KONDISI KERANG TOTOK (Polymesoda erosa) DI HUTAN MANGROVE DESA NUSAJAYA KECAMATAN WASLEI SELATAN KABUPATEN HALMAHERA TIMUR MALUKU UTARA

2015 ◽  
Vol 2 (3) ◽  
pp. 110 ◽  
Author(s):  
Alfrina Rumbiak ◽  
Jan F.W.S. Tamanampo ◽  
Gaspar D. Manu
Keyword(s):  
Body Weight ◽  
Class Size ◽  
Condition Factor ◽  
Regression Coefficient ◽  
Strong Relationship ◽  
Mangrove Ecosystem ◽  
Strong Positive Relationship ◽  
R Value ◽  
Relationship Of ◽  
The Relationship

Clam, Polymesoda erosa is species that live in sandy and muddy substrata of mangrove ecosystem. The aims of this study are to look at the relationship of the shell length and width,body thiekness, body weight and organ weight based on class size to determine the growth. The study also was designed to reveal the conditional factor based on the clam class size. The samples were collected during the day at lowest tide in January 2014. The total is 153 individuals of Polymesoda erosa clam were collected during the study. The result shows thare is a strong positive relationship between body lenght and body weight as shown within  the regression analysis with intercept (a) = 0,470779,  regression coefficient (b) = 0,69095 and correlation coefficient (r) = 0,406357. Based on the r value, it can be concluded that there is strong relationship regarding the length and weight increment as much as 40,63 %.   Keywords : Characteristics Morphometrics and Shellfish totok condition factor Nort Maluku ABSTRAK .         Kerang  totok (Polymesoda erosa) adalah salah satu jenis moluska dalam kelas bivalvia yang hidup di ekosistem mangrove pada daerah yang bersubstrat pasir dan berlumpur. Penelitian ini bertujuan. mengetahui kisaran ukuran panjang cangkang,,lebar cangakang, tubuh, berat tubuh, dan berat organ lunak, selanjutnya mengetahui pertambahan panjang, lebar cangkang, tebal tubuh, berat tubuh, dan berat organ lunak berdasarkan kelas ukuran, dan juga  mengetahui hubungan pertumbuhan panjang cangkang, dan berat cangkang, dan  mengetahui faktor kondisi kerang di setiap kelas ukuran.  Pengambilan sampel di lakukan pada siang hari saat surut terendah pada bulan januari 2014. Berdasarkan kegiatan penelitian di wilayah pesisir Desa Nusajaya Kecamatan Waslei Selatan Kabupaten Halmahera Timur Maluku Utara, dikumpulkani  153 individu kerang totok (Polymesoda erosa). Hasil analisis regresi menunjukkan bahwa setiap pertambahan panjang cangkang akan diikuti dengan pertambahan berat secara proporsional mengikuti nilai Intercept (a) = 0.470779, dan koefisien regresi (b) = 0,690957. Niilai koefisien korelasi (r) = 0. 406357 menyatakan  adanya korelasi positif yang menerangkan terdapat keeratan hubungan  antara pertambahan panjang cangkang dengan pertambahan berat berat tubuh sebesar 40.63 %   Kata kunci :Karakteristik Morfometrik dan Faktor kondisi KerangTotok Maluku utara   1Bagian dari skripsi 2Mahasiswa Program Studi Manajemen Sumberdaya Perairan FPIK-UNSRAT 3Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi  

The effect of pregnancy in heifers on voluntary intake, total rumen contents, digestibility and rate of passage

1969 ◽  
Vol 9 (40) ◽  
pp. 493 ◽  
Author(s):  
JL Lamberth
Keyword(s):  
Food Intake ◽  
Dry Matter ◽  
Late Pregnancy ◽  
Dry Matter Digestibility ◽  
Food Particles ◽  
The Mean ◽  
Voluntary Intake ◽  
Food Residues ◽  
Sorghum Silage ◽  
Voluntary Food Intake

In two experiments using twin heifers with one of each pair pregnant, the effect of advanced pregnancy on the voluntary food intake, dry matter digestibility and rate of passage of food residues, was studied. In the first experiment sorghum silage was fed ad lib. In the second experiment lucerne chaff was fed at ad lib. and restricted levels and, in addition to the measurements listed above, the quantity of reticulo-rumen contents was determined in each animal. In both experiments each of the pregnant heifers ate less than their non-pregnant CO-twins, and, on analysis of all the data on ad lib. feeding, the differences were significant (P<0.01). The mean coefficients of dry matter digestibility for the pregnant heifers were significantly (P<0.01) less than those for non-pregnant heifers. This caused a significantly (P<0.01) lower intake of digestible dry matter by the pregnant heifers. Measurements of the contents of the reticulo-rumen and the rate of passage of food particles gave inconclusive results. These experiments demonstrated that there was a depression of voluntary intake in late pregnancy the cause of which is not known. This would be nutritionally significant only when the quality and voluntary intake of food were marginal.

Suppression of Food Intake in the Rat by Tung Oil

1973 ◽  
Vol 51 (10) ◽  
pp. 733-736 ◽  
Author(s):  
James C. McPherson Jr.
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Corn Oil ◽  
Caloric Intake ◽  
Stomach Tube ◽  
Adult Rats ◽  
Tung Oil ◽  
Voluntary Intake ◽  
Dry Food ◽  
Voluntary Food Intake

Tung oil has previously been found to suppress voluntary food intake when mixed with the diet. When tung oil or corn oil were fed by stomach tube to weanling and adult rats, the voluntary intake of laboratory chow was depressed by both lipids. The corn-oil fed animals readjusted their caloric intake to their prefeeding level in adults and to the level consumed by chow-only fed weanlings of the same age. However, the tung-oil fed adult animals consumed only one-half the dry food intake of the corn-oil fed animals (p < 0.001). Consequently the adult tung-oil fed animals lost significantly more (p < 0.01) of their body weight than did the corn-oil fed controls. This suggests that the mechanism of suppression of food intake by tung oil operates at some level other than taste or consistency of the diet.

Body-weight-fleece-weight relationships in a strain of Merino sheep

1956 ◽  
Vol 7 (1) ◽  
pp. 57 ◽  
Author(s):  
PG Schinckel
Keyword(s):  
Body Weight ◽  
Body Surface ◽  
Unit Area ◽  
Merino Sheep ◽  
Wool Production ◽  
Significant Difference ◽  
The Mean ◽  
Fleece Weight ◽  
Relationship Of ◽  
The Relationship

The relationship of body weight to wool production was examined in a flock of Merino sheep of South Australian strain over a period of 7 years. In only one out of 10 groups examined was there a significant correlation between body weight and the amount of clean wool produced per unit area of midside skin. It is concluded that body weight and wool production per unit area of body surface are independent. In all groups there was a highly significant correlation between clean fleece weight and clean wool per unit area of body surface in the midside region. The regression of log fleece weight on log body weight was determined in 15 groups. In no case was the regression coefficient significantly different from 0.60. As the regression of log surface area on log body weight in sheep is of the order of 0.60, it is concluded that wool production is proportional to fleece-bearing surface. The mean regression coefficients of log fleece weight on log body weight, calculated within sire and year groups, were: rams, 0.52 ± 0.056; ewes, 0.61 ± 0.038; wethers, 0.30 ± 0.068. There were no significant differences between sires in the regression of log fleece weight on log body weight. There were, however, highly significant differences between sire groups in mean log fleece weight, after adjustment for differences in log body weight. Skin areas 3 by 3 cm were tattooed on the left midside of 24 lambs at 1 month of age. The wool produced on these areas, and the areas of the tattoos, were measured at 4-monthly intervals from 4 months of age until 28 months. The amount of wool produced m7as proportional to the area in each of the six periods. There was also a highly significant difference between periods and between sheep in the amount of wool produced after adjustment for differences in tattoo area.

scholarly journals Oxygen Consumption and Cell Size. A Comparison of the Rate of Oxygen Consumption of Diploid and Triploid Prepupae of Drosophila Melanogaster Meigen

1953 ◽  
Vol 30 (4) ◽  
pp. 475-491 ◽  
Author(s):  
C. ELLENBY
Keyword(s):  
Body Weight ◽  
Drosophila Melanogaster ◽  
Oxygen Consumption ◽  
Body Size ◽  
Surface Area ◽  
Cell Size ◽  
Rate Of Oxygen Consumption ◽  
The Mean ◽  
Relationship Of ◽  
The Relationship

1. The oxygen consumption and surface area of individual diploid and triploid prepupae of Drosophila melanogaster have been measured, the cells of triploid animals being larger. 2. The mean weights for the types examined are different but their ranges overlap almost completely. By covariance analysis it is shown that, after adjustment for difference in body size, there are no differences in the rates of oxygen consumption. It is concluded that, for these animals, cell size has no influence on the rate of oxygen consumption. 3. The relationships between body weight, surface area, and oxygen consumption have been further investigated. It is shown that, despite the greater inaccuracy of the method by which surface area is determined, oxygen consumption can be predicted more accurately from surface area than from body weight. 4. The results are discussed in relation to an earlier investigation of the oxygen consumption of other genotypes (Ellenby, 1945 a, b). Possible technical causes of certain differences between the two series of results in the relationship of oxygen consumption and body weight are explored; it is concluded, however, that they are almost certainly due to differences, not necessarily genetical, between the animals used in the two series.

Development of a model of voluntary food intake and energy balance in lactating cows

1977 ◽  
Vol 24 (2) ◽  
pp. 203-214 ◽  
Author(s):  
J. M. Forbes
Keyword(s):  
Body Weight ◽  
Energy Balance ◽  
Food Intake ◽  
Abdominal Fat ◽  
Energy Requirements ◽  
Gut Contents ◽  
Lactating Cows ◽  
Physical Limitations ◽  
Voluntary Intake ◽  
Voluntary Food Intake

SUMMARYVoluntary intake of a range of feeds by cows is predicted on the assumption that the cows will satisfy their energy requirements unless physical limitations intervene. Predicted patterns of intake throughout lactation agree generally with observed changes, including an eventual plateau in body weight due to a predicted physical equilibrium between abdominal fat and gut contents. An attempt to incorporate a depression in milk yield when physical limitations prevented energy requirements being met by food intake was successful only with good quality feeds.

scholarly journals Palatability of two artificial feeds for reindeer

Rangifer ◽  
1990 ◽  
Vol 10 (4) ◽  
pp. 61
Author(s):  
Arne Rognmo ◽  
Karstein Bye
Keyword(s):  
Food Intake ◽  
Waste Product ◽  
Artificial Diets ◽  
Mixed Feed ◽  
The Mean ◽  
Ad Libitum ◽  
Voluntary Intake ◽  
Mill Waste ◽  
Voluntary Food Intake

Two groups of 15 reindeer were used to test the palatability of two artificial diets. None of the animals had experienced the diets before. Trials were carried out from April to mid May. Each group of animals was kept in a separate corral (600 sq. meters). Both groups were fed lichens for three days befort trials began. Then they were offered a concentrate feed (RF-80) or &laquo;Mill Waste Product&raquo; (MWP) ad libitum. Both groups ate little or nothing for the first three days of the trial and so lichens were mixed with the two experimental feeds. The mean voluntary food intake of the RF-80-group increased from 0.8 Kg/day/animal to 1.8 Kg/day/animal after three weeks. A mixed feed, RF-80/lichen, was only used the first day for animals in the RF-80 group. Reindeer refused to eat MWP for twelve days despite mixing it with lichens. They were then offered RF-80 ad lib. without a mixture of lichens. The mean voluntary intake of these animals increased from 1.3 Kg RF-80/day/animal on day 13 to 2.3 Kg/day/animal by day 26. Two calves in the MWP-group got diarrhoea after refeeding with RF-80.

Sign in / Sign up

Export Citation Format

Share Document