Physiological Stress Response of Differences in Stocking Density to Hematological Parameters of Red Tilapia (Oreochromis sp.) on Budikdamber System

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Vina Nur Nadiro, Sri Andayani, Maheno Sri Widodo, Nurhalisa

Abstract

The fish farming program in buckets (budikdamber) is an environmentally friendly fish farming technique for ecosystems between the development of fish and vegetables by using buckets as a container for fish development and water for development media. Optimization of fish farming with high stocking densities accompanied by high feeding will cause accumulation of organic matter in culture containers which will worsen the quality of the rearing water which will ultimately have an impact on the physiological and hematological conditions of fish. Hematology is a scientific discipline that studies the components of blood cells and the functional disorders of these cells. Under stress conditions, the secondary response will cause changes in the hematological condition of the fish. The purpose of this study was to determine the stress response to changes in hematology from differences in stocking density of red tilapia (Oreochromis sp.) in the Budikdamber system. The experimental design used a factorial complete randomized design with density treatment (A (2 fish/10L), B (4 fish/10L), C (6 fish/10L), D(8 fish/10L) and system (budikdamber with water spinach (a) and without water spinach (b). This study lasted for 4 weeks. Erythrocytes in all treatments experienced their highest point and peak of stress in the 2nd week. Erythrocytes decreased which is suspected that the fish had adapted and recovered to initial hemostasis in the 3rd and 4th week. The best erythrocytes were the Ab treatment (2 fish/10L without water spinach) namely 1,616,666 cells/mm3. Leukocytes in all treatments experienced the highest point and peak stress in the 2nd week. Leukocytes decreased in the 3rd and 4th week which were thought to have adapted and recovered to initial hemostasis. The best leukocytes were treatment Aa (stocking density of 2 fish/10L with water spinach) which had a leukocyte value of 55,266.67 cells/mm3. Hematocrit in all treatments had the highest point and peak stress at week 3. The hematocrit in all treatments decreased except for treatment Aa which experienced a decrease in which it was suspected that the fish had adapted and recovered to initial hemostasis in the 4th week. The best hematocrit was Aa (stocking density of 2 fish/10L with water spinach) which had a hematocrit value of 21.67%. Hemoglobin in all treatments experienced its highest point and peak of stress in the 3rd week. Hemoglobin in all treatments decreased except for treatment Aa in the 4th week which presumably the fish had adapted and recovered to initial hemostasis. The best hemoglobin treatment was Aa (stocking density of 2 fish/10L with water spinach) which had a hemoglobin value of 12 g/dL.

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