Tối ưu hóa qui trình vận chuyển sống tôm càng xanh (<i>Macrobrachium rosenbergii</i>) không dùng nước

Abstract

The study was conducted to find the optimal wateless shipping protocol for live giant freshwater prawns. The experiment was conducted on 3 factors with 16 treatments including: four different types of media (HDPE plastic pipes, Kaldnes plastic beads, straw and cotton sheets) x two anesthesia methods (cold water at 15⁰C,  cold water at 15⁰C and anesthesia of 50 ppm) x two shipping packaging methods (without oxygen and with oxygen supplied). Each treatment was repeated 3 times in a foam container with a volume of 5 L. The prawns had a weight from 55-60 g/prawn randomly selected and packed with a density of 10 prawns/box. The experiment was investigated with 4 transport time levels: 6, 9, 12 and 15 hours. Experimental results show that the survival rate of prawns after transportation is significantly different (p < 0.01) when using different types of media, different anesthesia methods, different packaging methods and shipping times. The media is straw and cotton sheets combined with the cold water + anesthetic and packed with oxygen supplied during transportation to achieve the highest survival rate (over 80%) and the transportation time up to 12 hours. However, when transporting for a short time from 6 to 9 hours, the media of HDPE plastic pipes or Kaldnes plastic beads can be used for higher transport efficiency.

Keywords: giant freshwater prawns, shipping protocol, waterless shipping