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| Effects of adding sea mud into feed on water environmentalfactors and population density of Tisbe furcataunder indoor breeding conditions |
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| Abstract: |
| Tisbe furcata was cultured indoor in cement pools in seahorse teaching and researching base of
Ludong University in Yantai city，Shandong province，China. By fed feed adding different amount of sea mud，
the community densities of T. furcata were compared and the relationship between community density and water
environmental factors，such as nitrite，nitrate，ammonia nitrogen and phosphate，were analyzed. The results showed
that the community density of T. furcata fed by feed without adding sea mud was significantly higher（P<0.01），
which implied that high community density of copepods naturally growing in the sea cucumber breeding ponds could
not directly use sea mud as their feed. Among nitrite，nitrate，ammonia nitrogen and phosphate，nitrite represented
the most important one，because it was significantly correlated with copepods’ community density at the beginning.
While when its concentration exceeded 0.4 mg/L，it would inhibit the growth of copepods. Therefore，nitrite should be
monitored carefully during the aquaculture process. Phosphate was significantly correlated with copepods’ community
density during its breeding. |
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