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:: دوره 12، شماره 2 - ( 1392 ) ::
جلد 12 شماره 2 صفحات 334-320 برگشت به فهرست نسخه ها
Changes of digestive enzymes activity in common carp (Cyprinus carpio) during larval ontogeny
چکیده:   (10678 مشاهده)
This study was aimed to gain knowledge on the ontogeny of digestive enzymes in common carp larvae at the governmental Warm water Fish Aquaculture Center of Shahid Rajaee in Sari, Mazandaran, Iran. The ontogenetic development of pancreatic (trypsin, chymotrypsin, lipase and α-amylase) and intestinal (alkaline phosphatase and aminopeptidase-N) enzymes were assessed in common carp larvae from first feeding (3 days post hatching) to 33 days post hatching (dph). The larvae started to feed on rotifers at day 3 to day 7. Feeding on a commercial diet was started from day-8 onwards. Specific trypsin and chymotrypsin activities feed with rotifer were 0.011 U/mg protein and 0.003 U/mg protein at day 7, respectively then the specific activities feed with dry food reached a maximum level at 33 dph (0.028 U/mg protein and 0.028 U/mg protein, respectively) (P<0.05) compared to live prey. The elevated alkaline proteases activity can be related to adaptation of larvae to digest protein content in the food. Specific lipase activity was 0.0006 U/mg protein at 7 dph then the activity feed with dry food reached a maximum level at 15 dph (0.0011 U/mg protein) (P<0.05) compared to live prey. Specific α-amylase activity feed with rotifer was 85.86 U/mg protein on the 7 dph consequently, its specific activity reached a maximum level at 15 dph (128.77 U/mg protein) (P<0.05). Specific alkaline phosphatase and aminopeptidase N activities feed with rotifer were 6 U/mg protein and 0.0106 U/mg protein at day 7, respectively then the specific activities feed with dry food reached a maximum level at 33 dph (28.66 U/mg protein and 0.58 U/mg protein, respectively) (P<0.05) compared to live prey.
     
نوع مطالعه: پژوهشي | موضوع مقاله: aquaculture
دریافت: 1392/2/23 | پذیرش: 1392/3/12 | انتشار: 1392/3/12
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Farhoudi A, Abedian Kenari A M, Nazari R M, Makhdoomi C H. Changes of digestive enzymes activity in common carp (Cyprinus carpio) during larval ontogeny. IJFS 2013; 12 (2) :320-334
URL: http://jifro.ir/article-1-992-fa.html

Changes of digestive enzymes activity in common carp (Cyprinus carpio) during larval ontogeny. مجله علوم شیلاتی ایران. 1392; 12 (2) :320-334

URL: http://jifro.ir/article-1-992-fa.html



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Creative Commons License این مقاله تحت شرایط Creative Commons Attribution-NonCommercial 4.0 International License قابل بازنشر است.
دوره 12، شماره 2 - ( 1392 ) برگشت به فهرست نسخه ها
Iranian Journal of Fisheries Sciences Iranian Journal of Fisheries Sciences
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