Selectivity Studies On Malaysian Trawls
A covered cod-end experiment was conducted employing 70 hauls of fish and shrimp trawls in the South China Sea and the Malacca Straits to determine the selectivity pattern of Malaysian trawls . This study was conducted in order to alleviate the intensive fishing effort on the fishery stocks esp...
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| 主要作者: | |
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| 格式: | Thesis |
| 語言: | English English |
| 出版: |
1987
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| 主題: | |
| 在線閱讀: | http://psasir.upm.edu.my/id/eprint/11749/1/FPSS_1987_2.pdf |
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| 總結: | A covered cod-end experiment was conducted employing 70
hauls of fish and shrimp trawls in the South China Sea and the
Malacca Straits to determine the selectivity pattern of
Malaysian trawls . This study was conducted in order to
alleviate the intensive fishing effort on the fishery stocks
especially towards the juveniles of commercially important
species .
A mathematical model was developed to predict the
selection curve based on the standard length and maximum body
depth of fish and shrimp species retained by the net .collection in a selectivity experiment is now simplified to
obtaining the two parameters from fish or shrimp sampled from
any catch .
Results of the study revealed that the 25 mm cod-end fish
trawl retained 98 . 2 percent as compared to the 51 mm cod-end
which retained 56 . 1 percent of the catch . With the shrimp
trawl , the 25 mm cod-end retained 9 2 . 6 percent while the 38 mm
cod-end retained 5 1 . 35 percent of the catch . |
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