Selectivity and tolerance of sea urchin (Hemicentrotus pulcherrimus) to environmental change

Abstract

Abstract: An experimental ecological study of sea urchin (Hemicentrotus pulcherrimus) sampled from coastal waters of Qingdao was focused on the fundamental ecological factors such as temperature, salinity, light intensity and substratum. The results showed that the suitable ecological range of temperature was from 8 ℃ to 22 ℃, and the selectivity to temperature was changed with the previous living temperatures. Hemicentrotus pulcherrimus was a kind of stenohaline creature. Its optimum ecological range of salinity was from 30 to 35. The results also showed that Hemicentrotus pulcherrimus liked to select weak light environment (<50 lux), especially under non food condition. Hemicentrotus pulcherrimus had the positive substratum selectivity to coarse sand and the negative substratum selectivity to silver sand.

Key words: Hemicentrotus pulcherrimus, Selectivity, Tolerance, Experimental ecology, starch, Horqin sandy land, carbon starvation, plant organ, soluble sugar

CLC Number:

S917.4

YOU Kai, ZENG Xiaoqi, LIU Hui, ZHANG Xiumei, LIU Qun . Selectivity and tolerance of sea urchin (Hemicentrotus pulcherrimus) to environmental change[J]. Chinese Journal of Applied Ecology, 2003, (3): 409-412.

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