Effects of early pregnancy in growth, body composition and efficiency in mice.
نویسندگان
چکیده
Growth, body composition and energetic efficiency of early-pregnant (EP), normal-pregnant (NP) and virgin mice fed ad libitum were studied. Mean mating ages were 29.4 + .45 and 51.5 + .29 days for EP and NP females, respectively. Protein, fat and ash weights and caloric value at parturition were greater in NP than in EP females, as were the percentages of protein and fat. However, EP females had higher (P<.01) gains from mating to parturition in protein, ash and moisture, while feed intake was similar. Body composition of litters at birth from EP and NP females did not differ significantly, when expressed on either a weight or percentage basis. Pregnant females (exclusive of their litters), when compared to virgins of the same age, demonstrated a greater (P<.01) protein and ash gain and efficiency, but a reduced fat content. Thus, EP females were able to adjust physiologically to pregnancy at an early age and still exhibited the accelerated growth observed in virgin females of the same age. (
منابع مشابه
The effects of different levels of biogen probiotic additives on growth indices and body composition of juvenile common carp (Cyprinus carpio L.)
An experiment was conducted to evaluate the effects of biogen probiotic additives on growth performance of common carp, Cyprinus carpio. Four practical diets containing 0 (control) , 0.1, 0.2 and 0.3 % Biogen probiotic were used to feed fish. Seventy-two juvenile common carp (65 ? 3.5g) were randomly distributed between 12 fiberglass tanks of 500 L capacity. During 60 days of feeding trial, the...
متن کاملThe effects of feeding rates on growth performance, conversion efficiency and body composition of juvenile snow trout, Schizothorax zarudnyi
This study was performed to investigate the effects of feeding rates on growth performance, feed conversion and body composition of juvenile snow trout (Schizothorax zarudnyi). For this purpose, fish with an initial body weight of 2.17± 0.1 g were fed a commercial diet (40% protein, 3.8 Kcal/g diet) at five ration sizes 2%, 4%, 6%, 8% and 10% of their body weight per day, for 60 days. Feeding t...
متن کاملEffects of feeding levels on growth performance, feed utilization, body composition, energy and protein maintenance requirement of fingerling, rainbow trout, Oncorhynchus mykiss (Walbaum 1792)
A 10-week feeding experiment was conducted to evaluate the effects of feeding level, energy and protein maintenance requirement of rainbow trout, Oncorhynchus mykiss, fingerling (5.65±0.45cm; 1.42 ±0.25g) by feeding casein-gelatin based purified diet (45% CP; 3.67 kcal g-1 GE) at six feeding levels 2-7% of BW/day in two equal meals, at 0800 and 1700 h, in triplicate, with 20 fish per trough fi...
متن کاملEffects of the color of the bedding of cultivated aquariums on growth, nutrition and biochemical body composition in freshwater prawn postlarvae (Macrobrachium rosenbergii(
In this study, the effect of the color of the bedding of cultivating aquariums (white, black, green, blue) on growth performance, nutrition and biochemical composition of the body of large freshwater shrimp (Macrobrachium rosenbergii) post larvae was investigated. All laboratory and experimental stages of this study were carried out in the fall of 1397 and for 60 days in an ornamental fish plan...
متن کاملEffects of supplemental dietary L-carnitine on growth and body composition of beluga (Huso huso) Juveniles
The effect of feed supplemented with L-camitine at four levels of 0, 300, 600 and 900mg kg-1 on growth performance and body composition of beluga, H. huso, juveniles was evaluate din two separate trials. In the first trial, 180 juveniles (525±9gw) were fed with the test diet for a period of 71 days, and the trial extended to another 126 days in the second phase by randomly selecting 120 juvenil...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Journal of animal science
دوره 42 1 شماره
صفحات -
تاریخ انتشار 1976