The Effects of Substrate Grain Size and Mud-sand Burrowing Ability of Urechis unicinctus Juveniles. | [International Journal of Agriculture and Biology • 2019]

Author(s):

1. Feng Liu: Yantai Research Institute, China Agricultural University,Yantai-264670,China

2. Tao Sun: Yantai Research Institute, China Agricultural University,Yantai-264670,China

3. Yuan Ji: Yantai Research Institute, China Agricultural University,Yantai-264670,China

4. Zheng Ma: Shandong Dongrun Instrument Sci-Tech Co., Ltd.,Yantai-264003,China

5. Yancui Zhao: School of Life Science, Ludong University,Yantai-264025,China

6. Hairui Yu: College of Biological and Agricultural Engineering, Weifang University,Weifang-261061,China

7. Chun'e Liu: Yantai Research Institute, China Agricultural University,Yantai-264670,China

Abstract:

In order to find out the optimal substrate grain size and mud-sand ratio and improve the burrowing ability of Urechis unicinctus juveniles, we explored the effects of substrate grain size (fine sand: 125-250 µm; medium sand: 250-500 µm; coarse sand: 500-2000 µm) and mud-sand ratio (0:1; 3:7; 1:1; 7:3; 1:0) on the burrowing ability of juveniles with a body length of 1.50±0.14 cm and a weight of 0.50±0.06 g. Results showed that substrate grain size and mud-sand ratio significantly affected minimum burrowing time, burrowing time and burrowing rate respectively (P0.05). Thus, it can be concluded that smaller the substrate grain size and the lower the mud content, the shorter minimum burrowing time and burrowing time, the higher the burrowing rate and the burrowing ability. In the culture of U. unicinctus, farmers need to choose small grain size substrate with high sand content, and avoid large grain size substrate with high mud content.

Page(s): 848-852

DOI: 10.17957/IJAB/15.0965

Published: Journal: International Journal of Agriculture and Biology, Volume: 21, Issue: 4, Year: 2019

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