Behavioral Characteristics of the Juvenile Japanese Surf Clam Pseudocardium sachalinensis in response to Sand Erosion and Deposition Associated with Oscillatory Water Flow

DOI Web Site Web Site 1 Citations 30 References

Bibliographic Information

Other Title
  • Behavioral Characteristics of the Juven

Search this article

Description

This study examined the behavioral characteristics of juvenile Japanese surf clam Pseudocardium sachalinensis in response to sand erosion and deposition under laboratory conditions, then estimated the fluid conditions critical to wash the clams out of the sand. The juveniles started burrowing downward into sand when their burying depth decreased to less than 1.5 times the shell length due to erosion, and moving upward when the depth increased to more than 2.5 times the shell length due to deposition of sand. Burrowing and climbing actions of the juvenile continued until the depth reached 1.7-2.1 times the shell length once again. The burrowing and climbing speeds were about 1.8 times higher than the speed of erosion or deposition of sand. It was concluded that the juveniles would maintain their position actively in order to avoid being washed out or buried too deeply by adapting their behavior to the dynamic conditions of sand movement. The juveniles were washed out of the sand when the erosion speed exceeded 3.5 mm/min, and such erosion occurred when oscillatory water flow speeds over a sandy bottom with median particle diameter of 0.3 mm exceeded more than 45 and 55 cm/s at periods of 4 s and 8 s, respectively.

Journal

  • Fisheries science

    Fisheries science 64 (3), 367-372, 1998

    The Japanese Society of Fisheries Science

Citations (1)*help

See more

References(30)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top