کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5763938 1625694 2017 30 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of light intensity on performance of larval pike-perch (Sander lucioperca)
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
پیش نمایش صفحه اول مقاله
The effect of light intensity on performance of larval pike-perch (Sander lucioperca)
چکیده انگلیسی
In this work performance parameters of larval pike-perch (Sander lucioperca) reared under four different light intensities (100, 500, 1000 and 2500 lx) until 21 days post hatch (dph) were investigated. As performance parameters change in length and weight, swim bladder inflation, feed consumption, natural mortality, stress induced mortality and RNA-DNA ratio were measured. Aim was to investigate the influence of light intensity on pike-perch performance during the first three weeks of larval rearing. Significant differences were found in natural and stress induced mortality as well as in weight growth. No single light exposure level combined optimal performance of all tested performance parameters. Highest light intensity of 2500 lx showed good weight growth but an increase in stress induced mortality. Bright light of 500 and 1000 lx intensity was found to improve growth and stress mortality whereas dim light conditions of 100 lx showed significantly lower natural mortality. Thus data suggested that most favorable illumination during larval pike-perch rearing comprise a tradeoff between optimal natural mortality under dim light conditions (100 lx) or optimal larval growth and stress resistance under bright light conditions (500 and 1000 lx). It is shown that high light intensities during larval rearing can be beneficial for pike-perch rearing if offspring supply is not limited.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquacultural Engineering - Volume 77, May 2017, Pages 61-71
نویسندگان
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