Browsing by Author "Yeong Yik Sung"

Now showing 1 - 4 of 4
  • Thumbnail Image
    Item
    Effects of calcium (Ca2+) on pearlscale goldfish (Carassius auratus)
    (Terengganu: Universiti Putra Malaysia Terengganu, 2000) Yeong Yik Sung
    The hatching rate, survival rate and growth rate of Pearlscale goldfish (Carassius auratus) larvae, scales formation in young Pearlscale goldfish and calcium absorption (Ca2+) in adult Pearlscale goldfish were studied. The eggs and fish were exposed to various Ca concentrations.
  • Thumbnail Image
    Item
    In Vitro Evaluation Of Probiotic Properties Of Bacillus Licheniformis Strain UMTK003 From Gut Of Wild Orange Mudcrab , Scylla Olivacea From Setiu Wetlands, Terengganu Malaysia
    (Journal of Sustainability Science and Management, 2017) Nur Azna Saari; Nor Hazwani Hamzah; Mohamed Tajuddin Abdul Manaf; Lee Kok Leong; Alia Syafiqah Aznan; Wan Nurhafizah Wan Ibrahim; Nurul Aqilah Iberahim; Khairulbariyyah Zakaria; Nadirah Musa; Laith Abdul Razzak; Muhd Danish Daniel Abdullah; Shumpei Ieahata; Sandra Catherine Zainathan; Sharifah Noor Emilia Syed Jamil Fadaak; Sharifah Rahmah Syed Muhammad; Yeong Yik Sung; Mazlan Abd Ghaffar; Najiah Musa
    Mud crabs are among the commercially important aquatic animals because of high demand in Asian countries. Currently, one of the main constraints for expansion of mud crab aquaculture is the inconsistent and low hatchery production of crab juveniles. The use of beneficial bacteria offers a promising approach in aquaculture to prevent infections by pathogenic bacteria, and has been shown to help reduce mortality after infection. The goals of this study were to isolate, identify and evaluate potential probiotic bacteria from the gut of wild orange mud crab from Setiu Wetlands, Terengganu.
  • Thumbnail Image
    Item
    Protection of artemia from vibriosis by heat schock and heat chock proteins
    (Ghent University, Belgium, 2008) Yeong Yik Sung
  • Thumbnail Image
    Item
    Stress response for disease control in aquaculture
    (Blackwell Publishing Asia Pty Ltd, 2011) Yeong Yik Sung; Thomas H. MacRae; Patrick Sorgeloos; Peter Bossier
    Heat shock proteins (Hsps) are robustly induced by diverse stressors that denature proteins. In addition to stress resistance, Hsps are involved in the folding of nascent proteins, plant and animal development, aging, environmental adaptation and the immune response, demonstrating the fundamental importance of these proteins to cell survival. Heat shock proteins are induced in aquatic organisms by perturbations of temperature and salinity, environmental contaminants, handling, hormones and biotic stressors. Exposure to sublethal stress may enhance tolerance to a subsequent stress, a process termed induced thermotolerance, and provide protection to stressors other than the initial stress, known as cross-tolerance. In the present review, we briefly describe the established approaches that are used to control disease during aquaculture. This is followed by documentation of Hsp induction after exposure to stressors commonly encountered by aquatic organisms. Induced thermotolerance, cross-tolerance and immune enhancement by Hsps are also considered. Although physiological stress is known to decrease disease resistance it is now becoming clear that stress-induced Hsps enhance the tolerance of aquatic organisms to disease. Potential applications for Hsps in the commercial production of fish, crustaceans and molluscs are indicated, an issue of significance when the importance of aquaculture in feeding the world’s population is realized.