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Proper Construction And Set Up Of Malaysian Fish Aggregating Devices (Unjam)

Ibrahim, Sakri (1991) Proper Construction And Set Up Of Malaysian Fish Aggregating Devices (Unjam). PhD thesis, Universiti Pertanian Malaysia.

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Abstract

This study was carried out with an objective of improving the durability of unjams and determining the rational arrangement and optimum density of unjams . Several experiments were conducted in coastal waters of Terengganu in the South China Sea to determine a safe anchoring power of unjams and parameters required for the development of mathematical models that could produce an optimum trapping efficiency .Experiment s on anchoring power showed sandy bottom giving the highest value of fixing coefficient ( 0. 953 ) , foll owed by muddy bottom ( 0. 903 ) , and sandy -mud bottom ( 0.731 ) . This value was found to be higher for two sandbags tied one behind the other than for two sandbags tied in one lump.The unjam's anchor was found to have a reserved fixing force of 67 . 34 kg , which is 93 . 86% in excess of what was required to anchor a n unjam in place .

Item Type:Thesis (PhD)
Subject:Fish habitat improvement
Subject:Fish habitat improvement - Malaysia
Subject:Fisheries - Malaysia - Great selectivity
Chairman Supervisor:Associate Professor Dr. Mohd. Azmi Ambak
Call Number:FPSS 1991 2
Faculty or Institute:Faculty of Fisheries and Marine Science
ID Code:11772
Deposited By: Mohd Nezeri Mohamad
Deposited On:21 Jul 2011 10:11
Last Modified:08 Sep 2011 17:16

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