scholarly journals Selection for 8-Week Body Weight under Different Dietary Protein Levels

1978 ◽  
Vol 57 (1) ◽  
pp. 10-16 ◽  
Author(s):  
H.L. MARKS ◽  
W.M. BRITTON
Keyword(s):  
Body Weight ◽  
Dietary Protein ◽  
Protein Levels ◽  
Selection For

scholarly journals Effects of varying dietary protein levels on the performance of laying Japanese quail(Coturnix coturnix japonica) in a semi-arid environment

2021 ◽  
Vol 33 (1) ◽  
pp. 45-52
Author(s):  
S. Babangida ◽  
C. O. Ubosi
Keyword(s):  
Body Weight ◽  
Japanese Quail ◽  
Dietary Protein ◽  
Egg Production ◽  
Body Weight Gain ◽  
Arid Environment ◽  
Protein Levels ◽  
Average Body ◽  
Semi Arid ◽  
Average Body Weight

 Four dietary treatments differing in protein levels were compared to ascertain the protein requirement of laying Japanese quail in a semi-arid environment. One hundred and twenty quails were randomly assigned to four treatments (TI — 22%CR T2 — 20%CP T3 — 18%CP and T4 - I6%CP) in a completely randomized block design Each treatment was replicated thrice with ten quails each. Feed intake, body weight gain, hen day egg production, feed conversion ratio FCR), egg quality and hematological constituents were the response criteria. The study lasted seven weeks. Feed and water were provided ad libitum throughout the experimental period No significant (P> 0.05) effect of dietary protein was observed for feed intake, average body weight gain, hen-day egg production, F CR, dressing percentage and hematological parameters. Average body weight was significantly (P<0,05) enhanced by high dietary protein. Egg weight and Haugh unit were significantly (P<0. 05) better for the groups fed the higher protein levels (20 and 22% CP). Hen-day egg production, albumen index, specific gravity, shell weight and percent shell were not affected (P>0.05) by dietary protein levels. The costs of producing l kg egg in the treatment groups were ₦25926, ₦21007, ₦252.44 and ₦1263./10 for T1, T2, T3 and T4, respectively. It was concluded that about 20%CP is required in the diets of laying Japanese quail under a semi-arid environment of Nigeria.

Effect of flame roasting of dietary grains on the performance of leghorn hens

1994 ◽  
Vol 74 (2) ◽  
pp. 341-346 ◽  
Author(s):  
R. M.G. Hamilton
Keyword(s):  
Body Weight ◽  
Dietary Protein ◽  
Egg Production ◽  
Egg Quality ◽  
Control Diet ◽  
Productive Performance ◽  
Feed Conversion ◽  
Egg Weight ◽  
Protein Levels ◽  
Body Weights

Two experiments examined the effect on the performance of Leghorn hens given diets containing flame-roasted grains from 140 to 490 d of age. In exp. 1, the inclusion of barley, corn and wheat roasted at 121, 119 and 149 °C, respectively, had no significant (P > 0.05) effect on productive performance. Experiment 2 contained a factorial arrangement of treatments that involved two sources of dietary barley (non-roasted or flame-roasted at 154 °C), two methods of milling (hammer or roller) and two dietary protein levels (15 or 18%). Hens given the diets that contained roasted barley had lower (P < 0.01–0.001) 490-d body weights, egg production, early egg weight (196 d) and number of extra large sized eggs, and higher (P < 0.05–0.01) feed conversion, monetary returns, interior egg quality and number of medium sized and grades B and C eggs than those fed the non-roasted barley control diet. Mortality, the number of large-sized eggs and egg weights, feed conversion and the occurrence of blood spots were higher (P < 0.05–0.001) while the number of medium-sized eggs was lower (P < 0.05–0.001) when the hens were fed roller compared with hammer-milled grains. Hens given the 18% protein-containing diets had higher (P < 0.05–0.01) 490 d body weight, egg production, monetary returns and numbers of small sized and grades B and C eggs, but lower (P < 0.05) mortality than those receiving the diets that contained 15% protein. Key words: Flame roasting, dietary grains, Leghorn hens

scholarly journals Carry-over effects of dietary crude protein and triiodothyronine (T3) inbroiler chickens

1996 ◽  
Vol 75 (4) ◽  
pp. 573-581 ◽  
Author(s):  
R. W Rosebrough ◽  
A. D Mitchell ◽  
J. P Mcmurtry
Keyword(s):  
Body Weight ◽  
Dietary Protein ◽  
Broiler Chickens ◽  
Crude Protein ◽  
Relative Size ◽  
Dietary Treatment ◽  
Acetate Incorporation ◽  
Final Body Weight ◽  
Protein Levels

Indian River male broiler chickens growing from 7 to 30 d of age were fed on diets containing crude protein levels ranging from 120 to 3041 g/kg plus 0 or 1 mg triiodothyronine (T3/)kg diet. The purpose of this study was to examine the effects of these treatments on lipogenesis after a common diet was fed (180 g crude protein/kg diet from 30 to 56 d of age). Dietary treatment groups were sampled at 30 and 56 d. In vitro lipogenesis was determined by incubating liver explants for 2h at 37°in Hanks' salts containing 25 mM-HEPES and 10 mM-[2-14C]acetate and then measuring acetate incorporation into total lipid. Growth and feedconsumption from 7 to 30 d increased (P<0·01) as dietary protein increased from 120 to 210 g/kg diet. Both measurements decreased as crude protein increased from 210 to 300 g/kg diet.T, decreased (P<0·01) growth and feed intake during this period.Low-protein (<180 g/kg) diets increased (P<0·05) and T3, decreased lipogenesis in 30-d-old chickens. Although birds given T3from 7 to 30 dgrew at the greatest rate from 30 to 56 d of age, the final body weight was still less than controls.In vifm lipogenesis at 56 d of age was not affected by either of the two dietary treatments. In contrast, the relative size of the abdominal fat pad (g/kg body weight) at 56 d was decreased by feeding T3from 7 to 30 d. Any changes in metabolism elicited by either dietary protein levels or hormone treatments may be specific to the particular dosing interval and are not sustained when acommon diet is fed during a repletion period.

PERFORMANCE OF BROILER CHICKS FED TWO DIETARY PROTEIN LEVELS (18 AND 22%), TWO NEEPAWA WHEATS (14.5 AND 21.0% PROTEIN), AND SIX L-LYSINE LEVELS

1976 ◽  
Vol 56 (4) ◽  
pp. 769-773
Author(s):  
E. E. GARDINER ◽  
S. DUBETZ
Keyword(s):  
Body Weight ◽  
Dietary Protein ◽  
The Body ◽  
Broiler Chicks ◽  
Maximal Growth ◽  
Feed Conversion ◽  
Protein Levels ◽  
Body Weights ◽  
Supplemental Protein ◽  
Protein Diets

Day-old male broiler chicks were fed 14.5 and 21.0% protein Neepawa wheats as ingredients in broiler diets to 4 wk of age. Two levels of dietary protein (18 and 22%) and six levels of added L-lysine HCl (L-lysine) (0.0, 0.06, 0.12, 0.18, 0.24, and 0.30%) were used with each wheat. The desired dietary protein contents were obtained by varying the proportions of the wheats and soybean meal. Body weights and feed-to-gain ratios were significantly affected by the three variables. Within the 18% protein diets, the diet containing 14.5% protein wheat and supplemented with at least 0.18% L-lysine gave maximal growth and most efficient feed conversion. Maximal growth was not obtained on any of the 18% protein diets with 21.0% protein wheat, regardless of L-lysine supplementation. With the 22% protein diets, L-lysine supplementation up to 0.24% of the diet improved the body weight and feed conversions of the chicks when the diet contained 21.0% protein wheat, and generally the results were not different from those obtained when the diet contained the 14.5% protein wheat. L-lysine supplementation of the 22% protein diet containing the 14.5% protein wheat did not significantly affect growth or feed conversion. High-protein wheat supplemented with adequate L-lysine can be fed to chicks and thereby substantially reduce the amount of supplemental protein required.

ESTIMASI NILAI HERITABILITAS BOBOT IKAN MAS VARIETAS PUNTEN DALAM PROGRAM SELEKSI INDIVIDU

2016 ◽  
Vol 11 (3) ◽  
pp. 217
Author(s):  
Estu Nugroho ◽  
Budi Setyono ◽  
Mochammad Su’eb ◽  
Tri Heru Prihadi
Keyword(s):  
Body Weight ◽  
Selection Response ◽  
Base Population ◽  
Breeding Programs ◽  
Male And Female ◽  
Body Weight Trait ◽  
Population Selection ◽  
Selection For ◽  
Weight Trait ◽  
Selection Of

Program pemuliaan ikan mas varietas Punten dilakukan dengan seleksi individu terhadap karakter bobot ikan. Pembentukan populasi dasar untuk kegiatan seleksi dilakukan dengan memijahkan secara massal induk ikan mas yang terdiri atas 20 induk betina dan 21 induk jantan yang dikoleksi dari daerah Punten, Kepanjen (delapan betina dan enam jantan), Kediri (tujuh betina dan 12 jantan), Sragen (27 betina dan 10 jantan), dan Blitar (15 betina dan 11 jantan). Larva umur 10 hari dipelihara selama empat bulan. Selanjutnya dilakukan penjarangan sebesar 50% dan benih dipelihara selama 14 bulan untuk dilakukan seleksi dengan panduan hasil sampling 250 ekor individu setiap populasi. Seleksi terhadap calon induk dilakukan saat umur 18 bulan pada populasi jantan dan betina secara terpisah dengan memilih berdasarkan 10% bobot ikan yang terbaik. Calon induk yang terseleksi kemudian dipelihara hingga matang gonad, kemudian dipilih sebanyak 150 pasang dan dipijahkan secara massal. Didapatkan respons positif dari hasil seleksi berdasarkan bobot ikan, yaitu 49,89 g atau 3,66% (populasi ikan jantan) dan 168,47 g atau 11,43% (populasi ikan betina). Nilai heritabilitas untuk bobot ikan adalah 0,238 (jantan) dan 0,505 (betina).Punten carp breeding programs were carried out by individual selection for body weight trait. The base population for selection activities were conducted by mass breeding of parent consisted of 20 female and 21 male collected from area Punten, eight female and six male (Kepanjen), seven female and 12 male (Kediri), 27 female and 10 male (Sragen), 15 female and 11 male (Blitar). Larvae 10 days old reared for four moths. Then after spacing out 50% of total harvest, the offspring reared for 14 months for selection activity based on the sampling of 250 individual each population. Selection of broodstock candidates performed since 18 months age on male and female populations separately by selecting based on 10% of fish with best body weight. Candidates selected broodstocks were then maintained until mature. In oder to produce the next generation 150 pairs were sets and held for mass spawning. The results revealed that selection response were positive, 49.89 g (3.66%) for male and 168.47 (11.43%) for female. Heritability for body weight is 0.238 (male) and 0.505 (female).

238-LB: Dietary Protein Restriction Induces Myocardial Dysfunction Despite Reducing Body Weight in Aged C57BL/6J Mice

Diabetes ◽  
2020 ◽  
Vol 69 (Supplement 1) ◽  
pp. 238-LB
Author(s):  
CHRISTOPHER L. AXELROD ◽  
WAGNER S. DANTAS ◽  
GANGARAO DAVULURI ◽  
WILLIAM T. KING ◽  
CRISTAL M. HILL ◽  
...  
Keyword(s):  
Body Weight ◽  
Dietary Protein ◽  
Myocardial Dysfunction ◽  
Protein Restriction ◽  
Dietary Protein Restriction
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