5 • N class not suitable is a region with very heavy constraint so it will be not
possible to be used a particular sustainably. Therefore the classification will be built based on criteria and data shown in table
2-1 and table 2-2. Table 2-2. Marine coastal suitability for pearl oyster cultivation source:
Suryanto et. all, 2006
Parameter S1 [80]
S2 [60]
S3 [40]
N [1]
Open water depth m [50]
1 - 11 11 – 28
28 – 36 16 – 20
1 36
Dissolved oxygen mgl [10]
6 5 – 6
4 – 5 4
Salinity ppt [10]
27 – 34 24 – 27
34 – 38 20 – 24
38 – 40 20
40 Temperature
o
C [10]
26 – 29 23 - 26
29 - 31 20 - 23
31 – 34 34
20 Brightness
[10] 80
70 – 80 60 – 70
60 pH
[10] 7.7 – 8.3
7.7 – 7.7 8.3 – 8.5
7 - 7.5 8.5 – 9
9 7
2.1.1. Characteristic of Coastal Marine
The characteristics of the location to be studied can be expressed into several parameters. Each commodity has a value and certain bio-physical measurement
requirements that should be fulfilled for a particular commodity.
2.1.1.1 Brightness
Brightness shows level of the depth of sunlight penetration to sea surface. Brightness in coastal area is strongly influenced by turbidity and sediment. If the
turbidity is high then the sunlight penetration to the water is low therefore lower level of brightness. Sunlight radiation is needed for photosynthesis process of
plant, if the turbidity of sea water is high, then the sunlight radiation will be less than the sea water with less turbidity. Brightness ranges highest from 75 for
seaweed and 80 for pearl oyster, where the diversity of the brightness value is caused by water depth contour at the location of the survey Suryanto, et. all,
2006. At some points of research which have a shallow depth, measurement of
6 the brightness can reach the bottom water, which indicates that the water
condition is very good to be used for the development of marine cultivation. Production of seaweed and pearl oyster increases in the dry season, and will
become less in rainy season.
2.1.1.2 Dissolved Oxygen
Dissolved oxygen DO is derived from the results of a photosynthesis process of water plant or diffusion of oxygen into water by aeration rapid movement as a
waste product of photosynthesis. Photosynthesis processes could occur in green plants and some chlorophyll-containing bacteria Utama, 2005. Oxygen is needed
by all sentient life in the water such as fish, shrimp, shellfish and other animals, including microorganisms such as bacteria. DO is the most important indicator of
the health of a water body and its capacity to support a balanced aquatic ecosystem of plants and animals. Waste water containing organic oxygen
consuming pollutants depletes the dissolved oxygen and may lead to the death of marine organisms. DO content in water provides a high level guidance to the
primary productivity of water. Oxygen molecules are contained in the physics of soluble water. Hence, solubility is strongly influenced by water temperature. DO
from the field measurements indicated highest from 2.6 - 4.7 mg I for seaweed and pearl oyster. In overall the observed water is suitable enough to support
aquatic life organisms Wiradisastra, 2004.
2.1.1.3 Temperature
