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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Bibliographic Details
Main Author:	Haji Mohamed, Mohd Ibrahim
Format:	Thesis
Language:	English English
Published:	1987
Subjects:	Trawls and trawling - Malaysia
Online Access:	http://psasir.upm.edu.my/id/eprint/11749/1/FPSS_1987_2.pdf
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id	my-upm-ir.11749
record_format	uketd_dc
spelling	my-upm-ir.117492024-06-26T00:33:00Z Selectivity Studies On Malaysian Trawls 1987-06 Haji Mohamed, Mohd Ibrahim 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 . Trawls and trawling - Malaysia 1987-06 Thesis http://psasir.upm.edu.my/id/eprint/11749/ http://psasir.upm.edu.my/id/eprint/11749/1/FPSS_1987_2.pdf text en public doctoral Universiti Pertanian Malaysia Trawls and trawling - Malaysia Faculty of Fisheries Kawamura, Gunzo English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
advisor	Kawamura, Gunzo
topic	Trawls and trawling - Malaysia
spellingShingle	Trawls and trawling - Malaysia Haji Mohamed, Mohd Ibrahim Selectivity Studies On Malaysian Trawls
description	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 .
format	Thesis
qualification_level	Doctorate
author	Haji Mohamed, Mohd Ibrahim
author_facet	Haji Mohamed, Mohd Ibrahim
author_sort	Haji Mohamed, Mohd Ibrahim
title	Selectivity Studies On Malaysian Trawls
title_short	Selectivity Studies On Malaysian Trawls
title_full	Selectivity Studies On Malaysian Trawls
title_fullStr	Selectivity Studies On Malaysian Trawls
title_full_unstemmed	Selectivity Studies On Malaysian Trawls
title_sort	selectivity studies on malaysian trawls
granting_institution	Universiti Pertanian Malaysia
granting_department	Faculty of Fisheries
publishDate	1987
url	http://psasir.upm.edu.my/id/eprint/11749/1/FPSS_1987_2.pdf
_version_	1804888653995966464

Selectivity Studies On Malaysian Trawls

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