کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8493136 1552795 2018 28 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Grass carp fed a fishmeal-free extruded diet showed higher weight gain and nutrient utilization than those fed a pelleted diet at various feeding rates
ترجمه فارسی عنوان
ریشه کپور خوراکی با رژیم اکسترود شده بدون غذای ماهی، افزایش وزن و مصرف مواد مغذی را نسبت به رژیم های خوراکی با سرعت تغذیه مختلف افزایش داد
کلمات کلیدی
کپور علفی، خوراک اکسترود شده، خوراک پلت شده، میزان تغذیه، رشد احتباس تغذیه ای،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
چکیده انگلیسی
The present study was conducted to investigate the effects of extruded and pelleted feeds at various feeding rates on growth and nutrient utilization of grass carp (Ctenopharyngodon idellus). Two fish meal-free feeds with the same formula were prepared as pelleted feed and extruded feed, and fed to eight treatments of fish (37.0 ± 0.2 g) with feeding rates of 100%, 90%, 80% and 70% satiation. During the feeding period, the fish of 100% satiation group were fed to apparent satiation, and then the other fish were fed with diets equal to 90%, 80% and 70% of 100% satiation group, respectively. After 10 weeks of feeding, the fish fed pelleted and extruded feeds showed no differences in feed intake (P > 0.05). At the same feeding rate, the fish fed extruded feed showed higher weight gain (WG), protein retention efficiency (PRE), lipid retention efficiency (LRE) and lower feed conversion ratio (FCR) than those fed pelleted feed (P < 0.05). In both pelleted and extruded feeds, WG and LRE reduced with the decreasing feeding rate (P < 0.05), but the fish fed at 80% satiation showed the lowest FCR and the highest PRE. Crude lipid contents, rather than crude protein contents of whole-body and liver decreased with the decreasing feeding rate (P < 0.05). In conclusion, grass carp fed extruded feed showed higher nutrient utilization than pelleted feed, and similar feed intake to pelleted feed. The feeding rate was suggested to be 80% satiation in both extruded and pelleted feeds based on nutrient utilization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquaculture - Volume 493, 1 August 2018, Pages 283-288
نویسندگان
, , , , , ,