| dc.description.abstract | Kelong shrimp (P. merguiensis) is one of some important fishing
commodities which have a high economy value which are widely available in the
District of Langkat. The condition of the fishing pressure which is high and the
production volume which is widely increased causes the stock depletion or
decrease the population of Kelong shrimps, the condition of overfishing might
happen. This study has the objective on accessing the biological aspects of Kelong
Shrimps. Some of the parameters of the growth are the body weight and the length
of carapace, the frequency distribution of carapace length, the sex ratio, the factors
of the condition, the assumption of mortality and exploitation rates. Thus study
was held in seven months, which are from June until December 2013. Collecting
the samples of Kelong Shrimp in 14 times with the interval of two week. The data
analysis using the ELEFAN I method (Electronic Length Frequencies Analysis)
which is packed in the program of FiSAT II (FAO-ICLARM Stock Assessment
Tool), Ford Wallford method, and Bhattacharya method.
The samples of Kelong shrimps are 1758 which consist of 654 male
shrimps and 1104 female shrimps. The growth pattern of Kelong Shrimps totally
is based on the correlation of the length and the weight has the negative allometric
growth pattern with the point of b<3. The frequency distribution of the carapace
length of Kelong Shrimps is in the range of 13.07-39.68 mm, the size group which
is dominating the male Kelong Shrimps and female Kelong Shrimps is 24.57-
25.88. The assumption of the Von Bertalanffy growth parameter using the method
of Ford Wallford of male Kelong Shrimps L∞ is 36.30 mm with K=0.5 per year,
while the assumption of the value of female Kelong shrimps L∞ is 41.91 mm with
K=0.62 per year. The rates of the total mortality (Z) by using the fishing result
curve analysis, which is Z = 2.526 per year. The natural mortality (M) is 1.161 per
year. The mortality caused by the arrest (F) is 1.365 per year show the
exploitation rates is 0.54. The value of exploitation rates of Kelong Shrimps,
which is obtained, is showing the indication of overfishing. The comparison of
male and female Kelong shrimps is 1:1.688. The value of the condition factor
which is obtained is in the range of 1-2 which shows that Kelong Shrimps have
the body shape which is flat (thin). | en_US |
