کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2424778 1105325 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Feeding regime does not influence lysine utilisation by Atlantic salmon, Salmo salar L., parr
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
پیش نمایش صفحه اول مقاله
Feeding regime does not influence lysine utilisation by Atlantic salmon, Salmo salar L., parr
چکیده انگلیسی

This study investigated whether the efficiency of lysine utilisation for liveweight gain, protein gain and lysine gain was affected by feeding regime in Atlantic salmon (Salmo salar L.) parr. Twelve diets containing from 10.15 to 20.79 g dietary digestible lysine kg− 1 were hand-fed either to satiation or to a controlled fixed ration. The controlled ration was set to equal the feed intake of the basal (lowest) lysine diet so that any growth above that of the group fed the basal diet at the controlled ration was due entirely to the additional dietary lysine. For both feeding regimes, with increasing dietary lysine there were significant linear increases in liveweight gain (P < 0.001) and in protein (P < 0.001) and lysine (P < 0.01) concentration of liveweight gain. Increasing dietary lysine resulted in a significant (P < 0.001) linear increase in feed intake at satiation. Efficiency of lysine utilisation for liveweight gain above maintenance lysine intake was significantly (P < 0.005) higher at satiation than for the controlled ration: 47.7 compared to 34.9 mg liveweight gain per mg digestible lysine intake, respectively. However, feeding regime had no significant effect on the efficiency of lysine utilisation for protein or lysine gain. This study demonstrated that feed intake does not influence the efficiency of lysine utilisation for protein or lysine gain in Atlantic salmon parr. The change in weight-specific lysine composition suggests a robust physiological mechanism maintaining the efficiency of lysine utilisation for lysine gain in Atlantic salmon parr.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquaculture - Volume 273, Issue 4, 20 December 2007, Pages 545–555
نویسندگان
, , ,