| dc.description.abstract | Green mussel (Perna viridis) is a mollusk that lives in coastal waters, especially in the
intertidal area. Many green mussels are found in the coastal at Putra Deli, Deli Serdang
Regency. Many fishermen and the community use green mussels as a source of
livelihood because they have high economic value and good nutritional content. It was
concerned that the high activity of the fishing community on Putra Deli Beach and the
continuous harvesting will cause a decrease in the population and resources of green
mussels in the beach of Putra Deli. This study aims to determine the density,
distribution patterns, and growth of green mussels using pearson correlation analysis.
This study used "Purposive Sampling" method, which was a sampling technique was
conduct by determining three station points based on human activities around the
stations. Station 1 was an estuary area where there is no human activities, station 2 is
a natural area of mangrove forest and station 3 is an area for tourisms. Density analysis
was conducted based on number of individual green mussels per square meter, whereas
distribution analysis using the morphic index formula, analysis of growth patterns were
determined by calculating length and total weight of individual mussels and the
relationship between physico-chemical factors in the waters and green mussel density
were analyzed using SPSS version 25 correlation. Results showed, the high density at
station 1 was 0.94 ind/m² and the lowest was at station 3 which was 0.33 ind/m². The
growth pattern of green mussels from each station was negative allometric or b < 3,
which means that the increase in length is more dominant than that the increase in body
weight. The green mussel distribution pattern from each station was clustered. The
correlation analysis showed that the pH, water salinity and organic content of the
substrate, light intensity, temperature and dissolved oxygen (DO) had very strong
effect on the density of green mussels. | en_US |
