Browsing by Author "Ahmad Azfar Mohamed"

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    Genetic and morphometric variability assessment of wild and captive populations of the climbing perch, Anabas testudineus towards development of a selective breeding programme
    (Terengganu: Universiti Malaysia Terengganu, 2015-03) Ahmad Azfar Mohamed
    In order to increase production of Anabas testudineus, selective breeding can be implemented to produce better performing stock. To initiate a successful selective breeding program, genetic variation is very important. This study was aimed to aid selective breeding of Anabas testudineus in Malaysia. Thus, morphological and molecular approach was adopted to investigate variation in hatchery stocks. In morphological approach, truss network method was applied to examine phenotypic variation of existing hatchery stocks. Cytochrome b gene was selected as a molecular marker to investigate the current status of genetic variation in hatchery stock. Growth performance of hatchery strain was conducted to evaluate performance of existing hatchery stock.
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    Kajian terhadap perubahan profil pantai dan ciri-ciri sedimen di sekitar muara Sungai Merang
    (Terengganu: Universiti Malaysia Terengganu, 2007) Ahmad Azfar Mohamed
    Kajian perubahan ciri-ciri sedimen di sekitar Muara Sungai Merang telah dijalankan daripada bulan Ogos sehingga Disember 2006. Kajian ini dijalanjan bertujuan untuk mengetahui perbezaan bentuk profil pantai dan ciri-ciri sediment di kawasan kajian semasa musim monsoon. Selain itu, arah pergerakan NSD di sepanjang pantai merang juga cuba dikenalpasti berpandukan kepada cirri-ciri sedimen dan profil pantai yang diperolehi. Parameter yang diperolehi termasuk saiz butiran dan profil pantai. Kaedah Ayak Kering (Buchanant, 1984) telah digunakan untuk mengenalpasti ciri-ciri sedimen kawasan kajian. Bagi sedimen muara, nilai min adalah 1.29 phi; penyisihan 1.03 phi; kepencongan -0.22 phi dan kurtosis 3.40 phi. Bagi sedimen pantai, stesen barat, min 1.39 phi; penyisihan 0.68 phi; kepencongan -0.32 phi dan kurtosis 4.48 phi. Stesen timur, min butiran 1.86 phi; penyisihan 0.70 phi; kepencongan -0.96 phi dan kurtosis 4.87 phi. Kecerunan pantai,stesen 1, 9.16 darjah; 2, 7.83 darjah; 3, 9.15 darjah; 4, 9.54 darjah; 5, 5.72 darjah; 6, 7.25 darjah; 7, 9.93 darjah; 8, 16.8 darjah. Arab hanyutan pantai bersih bergerak dari stesen 8 ke arah muara dan dari muara ke arah stesen 1. Hakisan pantai berlaku di stesen 4 hingga 8, manakala timbunan berlaku stesen 1 hingga 3 ketika monsun Timur Laut.