Browsing by Author "Rohisyamuddin Othman"

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    Effects of electroshock on climbing perch (Anabas testudineus) microbiological and physicochemical quality
    (AACL Bioflux, 2016) Nurul U. Karim; Rohisyamuddin Othman; Abol M. A. Bolong; Marina Hassan
    Electroshock had been widely used for scientific studies on riverine fish. The present study was carried out on the bacteriological and psychochemical quality of climbing perch (Anabas testudineus) that subjected to different voltages of electroshock (50, 70, 90 and 110 V) with controls left untreated. Electric charge at 70-90 V gives significant benefits to reduce (p<0.05) the bacteria accumulation in A. testudineus flesh. However, the total bacteria count were not significantly effects after treated at 50 and 110 V compared to the untreated fish. Electroshock were not significantly (p>0.05) giving an excessive accumulation on lactic acid that might alter the pH value in all samples. Furthermore, treatment at 90- 110 V showed a significantly (p<0.05) lower amount of total colour compared to the untreated samples and give a pale looks and discoloration to the fish flesh. The suitable electric charge for fish sampling were suggested at 70-90 V, which significantly contributes to reduce microbial effects and minimal attributes changes.
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    Kajian biologi ke atas populasi ikan kembung, Rastrelliger kanagurta (Culvier) di perairan pantai timur semenanjung Malaysia
    (Terengganu: Universiti Putra Malaysia Terengganu, 2002) Rohisyamuddin Othman
    Tujuan kajian ini adalah untuk mengumpul maklumat biologi bagi dikaitkan dengan pentaksiran sumber dan mengemaskini data supaya pengurusan sumber dapat diuruskan secara teratur dan berkesan
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    Variasi spatial dan temporal komuniti ikan terpilih di muara Sungai Terengganu, Terengganu, Malaysia
    (Terengganu: Universiti Malaysia Terengganu, 2012-07) Rohisyamuddin Othman
    Kajian ini dilakukan di Muara Sungai Terengganu yang terletak di Pantai Timur Semenanjung Malaysia dan mengadap Laut China Selatan. Tujuan kajian ini dilakukan adalah untuk menentukan variasi spatial dan temporal komuniti ikan di Muara Sungai Terengganu. Penyampelan ikan dilakukan setiap bulan bermula Februari 2006 hingga Januari 2007 di lima lokasi kajian yang ditentukan mengikut kecerunan saliniti di sepanjang Muara Sungai Terengganu.