International Journal of Chemical Studies
Vol. 2, Issue 2 (2014)
Optimization of seed and broodstock transport densities for improved survival of African carp (Labeo victorianus, Boulenger, 1901)
Author(s): Paul S. Orina, Joseph O. Rasowo, Mary A. Opiyo, Pricilla Boera, Jacob Abwao, Harrison Charo-Karisa
Abstract: Labeo victorianus fingerlings, post-fingerlings and brooders weighing 0.5 g, 5 g and 100 g respectively were harvested and conditioned for 24hrs before packaging for simulated transport. Fingerlings and brooders were packed in oxygen pressurized 5 L polythene bags filled with 1.5 L of water treated with 5 g of salt (NaCl) to reduce ammonia toxicity effect. Fingerling and post-fingerling packaging was done at 12, 15 and 20 g L-1 and 120, 150 and 200 g L-1while brooders were packaged in 400, 800 and 1200 g L-1. A 24 hour observation and recording was performed on mortality, pH, temperature, total ammonia, free ammonia, and dissolved oxygen (DO) at 0, 6, 12, 18 and 24 hours intervals. DO, pH and temperature were determined using Hanna Multi-parameter HI 9829. At the end of the transportation, the fish from the three treatments were each conditioned and stocked in hapas and mortality monitored over a period of 7 days. DO levels for all load densities had a significant increase (P<0.05) at 6 h due to addition of pressurized oxygen and experience a significant drop at 24 h but all remained within fish transportation recommended ranges. No mortalities were recorded at the end of simulated transportation and seven day observation in hapas mounted in earthen ponds. The study therefore recommends L. victorianus transportation load densities of 20 g L-1, 200 g L-1 and 1200 g L-1 for fingerlings, post-fingerlings and brooders respectively at a temperature range of 18.45±0.42 °C to 22.70±0.00 °C for high survival without compromising water quality.
Pages: 34-42 | 905 Views 7 Downloads
How to cite this article:
Paul S. Orina, Joseph O. Rasowo, Mary A. Opiyo, Pricilla Boera, Jacob Abwao, Harrison Charo-Karisa. Optimization of seed and broodstock transport densities for improved survival of African carp (Labeo victorianus, Boulenger, 1901). International Journal of Chemical Studies. 2014; 2(2): 34-42.