Low protein diet supplemented with crystalline amino acids suppressing appetite and apo-lipoprotein synthesis in laying hens

Supplementation of coated and uncoated crystalline amino acid mix in formulating a low‐fishmeal diet for Penaeus monodon (Fabricius, 1798): Effect on growth, digestibility, body composition, haemolymph indices and nitrogen metabolism

“…Supplementation of CAA resulted in better performance in monogastric animals, (Selle et al, 2020;Wang et al, 2020), but it is not successful always in aquatic species due to its leaching (Biswas et al, 2007;Chi et al, 2011;Fox et al, 2011). Earlier studies have been reported that supplemented CAA showed a better absorption than the amino acids of intact protein origins in various shrimp species, including P. monodon (Simon et al, 2021) and P. vannamei (Ji et al, 2021).…”

Low crude protein diets supplemented with free amino acids in laying hens : effects on performance, egg quality, N-efficiency, N-excretion, economics and diet carbon footprint

“…Laying hens fed the 16 to 16.5% CP diet had 2-3% lower average egg weight while the changes in feed intake, feed efficiency, and laying rate were not significant (Ji et al, 2014). In contrast, the results of several studies indicated negative effects of low protein diets on laying performance (Azzam et al, 2017a;Wang et al, 2020). In the present study, the reduction of the crude protein content of the diet up to 14.7% did not affect egg mass, but a further reduction to 13.5% and 12.0% reduced feed intake, body weight, laying rate, and egg mass, despite supplementation of essential AA.…”

Dusk feeding in laying hens is shifted by light program via involvement of clock genes

“…Plasma concentration of glucose was determined by spectrophotometry using a commercial diagnostic kit (Jiancheng Bioengineering Institute). The kit has been validated in chicken glucose determination (Wang et al, 2020;Zhao et al, 2017). Plasma concentration of insulin was determined by radioimmunoassay with guinea pig antiporcine insulin serum (3 V Bioengineering Group Co., Ltd.).…”