02299naa a2200361 a 450000100080000000500110000800800410001910000210006024501170008126000090019852013590020765000090156665000200157565000150159565000100161065000200162065000160164065000100165665000130166665000100167965000200168965000100170965000150171965000240173465000110175865300120176965300150178165300110179670000200180770000190182770000170184677300740186315222342023-06-06       1974    bl uuuu     u00u1 u    #d1 aBRADEN, A. W. H.  aEffect of protein and energy content of the diet on the rate of sperm production in rams.h[electronic resource]  c1974  aAbstract: In the first experiment, the effects of two levels of dietary protein and energy on the number of sperm in the excurrent ducts, on the weight of the testes and on the weight of the seminal vesicles were examined in two-year-old Merino rams from two Peppin and two non-Peppin strains. There were large effects of diet on each of the three characters, the effect of energy intake being much greater than that of protein intake. In addition, there were significant differences between strains: Peppin strain rams had higher sperm numbers and testicular weights than non-Peppin strain rams, even though liveweights were similar. In the second experiment, protein resistant to ruminal degradation was added to the basal ration to increase the quantity of amino acids absorbed from the intestines. Each of 10 rams was fed two diets in succession, and daily sperm production on each diet was estimated by the urine method. Daily sperm production was not affected by increasing the protein intake alone, but was significantly increased by increasing the intake of energy alone or of both protein and energy. The results indicate that a high protein intake is not essential for high sperm production in rams; a level of 12 g crude protein digested in the intestines per 100 g digestible organic matter did not appear to be limiting for sperm production.  aDiet  aDietary protein  aEpididymis  aSheep  aSpermatogenesis  aSpermatozoa  aUrine  aCarneiro  aDieta  aEspermatozóide  aOvino  aProdução  aReprodução Animal  aSêmen  aCaseins  aOrgan Size  aOvinos1 aTURNBULL, K. E.1 aMATTNER, P. E.1 aMOULE, G. R.  tAustralian Journal Biology Sciencygv. 27, n. 1, p. 67-73, Feb. 1974.