Alternative resilient livelihood option for fisher-folks tsunami victims

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2.4 Statistical Analysis All statistical analyses were performed using statistical package Minitab 14.0. Pearson correlations were used to evaluate the relation between water quality parameters and growth. Significance was compared using two tail two sample student t-test. 3. Results and Discussion The trials clearly showed that fisher folk are capable of implementing the technology of Gracilaria farming by them. At 45 days to a month old, branches of seaweeds start to fall off due to the water current. In order to save them from drifting away, nylon net should be placed as a fence around the area that is perpendicular to the water current. There is a strong Pearson correlation between the Growth Rate of Gracilaria and salinity, DO, while no positive correlation found were found between other variables. Table 1: Summary of the correlation studies between the growth rate and water quality parameters Parameter Correlation value Correlation type P value Salinity 0.970 Strong correlation 0.000 Dissolved Oxygen 0.267 Weak correlation 0.402 pH -0.197 Negative correlation 0.539 Turbidity -.0.376 Negative correlation 0.228 * Correlation value - Pearson correlation value, P value – Probability value Sudden change of the salinity affect the growth rate (P
will get much better prices. Exposure to the sun or heat during transport should be avoided to insure the freshness of the produce. During transport, it was not always possible to keep the seaweed wet and cool Siganus sp is the main grazers and they can literally wipe out Gracilaria culture (Coppen, 1990). However Siganus lineatus and Siganus javus severely grazed Gracilaria and reduced the net harvest. It appears that juvenile Siganus are largely to blame. The fish began entering the plots, as evidenced by grazed seaweed. During our farming period we observed that Siganus were less than 100 g, with the majority below 40 grams. Clearly, the seaweed farms were sited on the feeding grounds of the juveniles of the principal grazing species. Two methods were performed to protect the Gracilaria from Siganus sp were tested in Paalameenmadu. First, a net enclosure was made around the farming area traps. They are placed inside fenced plots. The second method involves making scare lines made of pieces of Palmyrah leaves. However, Siganus sp swam over the scare line and into the farm plot and all the seaweed was eaten by Siganus sp. These scare lines were totally ineffective. But the net enclosure fence had to be buried in the sandy bottom to prevent it from lifting off the bottom by water current and prevent to allowing the entry of grazer. The fence effectively excluded Siganus sp at Paalamenmadu. A few entered under the fence, but could be controlled with traps. It revealed that more trials are to be conducted to find the alternative sites. Small unidentified mollusks were frequently observed on planted lines and could have grazed on the few plants which germinated. During the culture period spores are fell down to the bottom and grew as a new Gracilaria bed and attract more herbivorous fish like Mugil cephalus, and Siganus sp. This will stimulate fish stock to remain hidden. These grounds act as feeding and spawning ground to many fish in this way enhance fish stock as well as it could be maintain ecological balance and dynamics. Assessment of commercial feasibility requires both long-term trials and sufficient production capacity to evaluate economic and technical costs. The results from crab fattening indicated that the fattening of crabs is possible growth and survival can be achieved through proper management. In this experiment, the mean survival percentage was 88% and mean mortality was 12%. The mortality was at an acceptable level and it was experienced at the initial stages of the fattening. These initial mortalities occurred during the first ten days could be due to a highly stressed new environment and poor handling during collection and transport. In crab fattening systems, mortality may also be caused by poor quality of water at the bottom of the mud. But in the floating cage system, this type of mortalities cannot be expected. Table 2 provides the data regarding the growth, survival, and production of crabs.
Page 1 and 2: Alternative resilient livelihood op
Page 3 and 4: 1.1 Objective The main objectives o
Page 5: Figure 3: The wooden crab cage Figu
Page 9 and 10: cycles in a year the estimated annu
Page 11 and 12: Cage 5 17.14 12,855.00 58,762.50 Fo
Page 13: Ramanathan, S. and Jaysmaha D.I.S,

Alternative resilient livelihood option for fisher-folks tsunami victims

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