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Assessment of digestive enzymes activity during the fry development of the endangered Caspian brown trout Salmo caspius

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The study of digestive enzymes activity at Salmo caspius fry showed that enzymes were available at the moment of mouth opening on the first day post hatching (dph) and the activity of enzymes showed no significant difference from the hatching day 28 dph. An increased activity was seen between 32 and 43 dph and this activity was significantly higher than the activity during the first 28 days. In the primary stages after yolk sac resorption (43–58 dph), enzymes activity showed an increased profile, however none of them showed a significant difference between 43 and 58 dph.

Keywords: Caspian brown trout; Salmo caspius; enzyme; fry

Document Type: Research Article


Affiliations: 1: Department of Fisheries of Gorgan University of Agricultural Sciences and Natural Resources, P.O. BOX 386 Gorgan, Iran 2: Department of Biotechnology of Razi Vaccine and Serum Research Institute, P.O. BOX 11365-1558 Hesarak, Karaj, Iran 3: Department of Fisheries and Environmental Sciences of Natural Resources Faculty of Tehran University, P.O. BOX 31585-4314, Karaj, Iran

Publication date: September 1, 2009


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