Abstract: The synergy effect of stocking densities and long term zero culture water exchange on growth and Hemato- immunological parameters of genetically improved farm tilapia (GIFT) juvenile (initial size 18.02±0.02g) was assessed. Water quality parameters; pH, dissolved oxygen (DO), temperature (T oC) and ammonia were recorded weekly. Results showed that weight gain, feed conversion rate (FCR), survival rate, final weight and SGR were negatively modulated (P<0.05). Hematological parameters including white blood cell (Wbc), red blood cell (Rbc), haemoglobin (Hb) and haematocrit (Ht); and non-specific immune parameters including Lysozyme activity (LYS), Immune globulin M (IgM) and Superoxide dismutase (SOD) were significantly affected by the varied densities and long term zero culture water exchange rate (P<0.05). Serum biochemical parameters including total protein; TP, glucose (GUL), cholesterol (CHO), triglyceride (TG), Aspartate aminotransferase (AST) and Alanine aminotransferase (ALT) were significantly affected by varied densities and long term zero culture water exchange rate (P<0.05). Meanwhile, while TP, GUL, CHO, and TG decreased significantly (P<0.05); AST and ALT increased significantly (P<0.05). High levels of TP, TG and CHO were observed in the lowest density group (TI). Ammonia level exceeded optimum range for tilapia weeks later. Practically, water in tanks culture must be refreshed after a week.
Keywords: GIFT tilapia; stocking densities; zero culture water exchange; growth; Hemato- immunological functions
Title: Stocking Densities And Zero Culture-Water Exchange Can Modulate Growth And Hemato- Immunological Functions In Juvenile GIFT Strain Tilapia, Oreochromis Niloticus L
Author: Mathew Didlyn Kpundeh, Jie He, Jun Qiang, Yang Hong, Pao Xu
International Journal of Life Sciences Research
ISSN 2348-3148 (online), ISSN2348-313X (Print)
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