Effect of stocking density on growth, biochemical composition, and blood parameters in the Pacific shortfin eel (Anguilla bicolor pacifica) elvers
College
College of Science
Department/Unit
Biology
Document Type
Article
Source Title
Philippine Agricultural Scientist
Volume
107
Issue
3
First Page
276
Last Page
285
Publication Date
9-2024
Abstract
This study examined the effect of stocking density on growth, biochemical composition, and blood parameters of the Pacific shortfin eel Anguilla bicolor pacifica. Elvers (1.95 ± 0.14 g body weight) were randomly stocked in indoor tanks and reared over 186 d at three stocking densities (0.3, 0.6, and 0.9 kg m-3) set up in triplicates. Except for survival and biometric indices, elvers maintained at 0.3 and 0.6 kg m-3 densities exhibited higher growth and feed utilization than those held at 0.9 kg m-3. Yield increased with stocking density, which were significantly higher at 0.6 and 0.9 kg m-3. RNA/DNA ratio did not reflect growth rate, but trends in survival and RNA/DNA ratio with stocking density were positively related. In contrast to body proximate composition, increasing stocking density resulted in significantly higher erucic acid (22:1n-9) and total saturated fatty acid levels at 0.6 and 0.9 kg m-3 densities, respectively. Serum glutamic pyruvic transaminase activity was significantly elevated at 0.6 kg m-3, while total protein, glucose, and triglycerides slightly decreased with increasing stocking density. Results suggest that Pacific shortfin eel elvers can be reared in indoor tanks at a stocking density of 0.3 – 0.6 kg m-3 to achieve acceptable growth, feed performance, and health condition.
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Recommended Citation
Aya, F. A., Unida, J. L., Garcia, L. B., & Eguia, M. R. (2024). Effect of stocking density on growth, biochemical composition, and blood parameters in the Pacific shortfin eel (Anguilla bicolor pacifica) elvers. Philippine Agricultural Scientist, 107 (3), 276-285. Retrieved from https://animorepository.dlsu.edu.ph/faculty_research/14017
Disciplines
Biology
Keywords
Anguilla (Fish)—Growth; Fish populations
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