Abstract
The Bali Strait waters become a place for various development activities that connect Java Island and Bali Island so that it is thought to have an impact in the life of microalgae that play an important role in the wealth of their water resources. This study aims to explore the distribution of marine microalgae, which has the potential as a bioindicator for Sardinella lemuru, as well as their relationship with the environmental characteristics of the Bali Strait waters. The research was conducted at the 8 with different waters characteristic. The data obtained were analyzed using Principal component analysis (PCA) and Correspondence analysis (CA). Spatially, salinity, ammonia, nitrate and lutein have significantly different value between stations. Chaetoceros gracilis and Tripos lunula are the main food of selection for Sardinella lemuru as an indicator their presence, located at station 5 (Pang-pang Bay), characterized by high nitrate content which is thought to be utilized by these types of microalgae.
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