Now showing items 1-3 of 3

    • Book chapter

      Bacterial diseases 

      EV Alapide-Tendencia & LD de la Peña - In GD Lio-Po & Y Inui (Eds.), Health Management in Aquaculture, 2010 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Fish and crustaceans that are not weakened by poor environmental conditions, or by other causes, such as parasitic infestation, nutritional deficiency, handling stress, or chemical intoxication, are more resistant to bacterial infections. This is due to the presence of a large amount of bactericidal substances in the blood, which helps overcome infections. So, the best precaution against the occurrence of bacterial infections is to provide the fish with optimum environmental conditions, adequate amounts of the right kinds of food and avoidance of stress, including overcrowding. Vaccination/ immunization and genetic manipulation (i.e., the development of specific pathogen resistant fry) are also some ways of preventing bacterial diseases. The use of antibiotics should always be an option of the last resort.
    • magazineArticle

      Bacterial diseases in tiger shrimp culture in the Philippines 

      CR Lavilla-Pitogo & LD de la Peña - SEAFDEC Asian Aquaculture, 1998 - Aquaculture Department, Southeast Asian Fisheries Development Center
    • Conference paper

      Singapore: Status of implementation of the resolution and plan of action on aquaculture. 

      TY Wee - In BO Acosta, RM Coloso, EGT de Jesus-Ayson & JD Toledo (Eds.), Sustainable aquaculture development for food security in Southeast Asia towards 2020. Proceedings of the Regional Technical Consultation on Sustainable Aquaculture Development in Southeast Asia Towards 2020, 2011 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Singapore is a small island state and its development of commercial aquaculture started only in the early 1970s. The foodfish aquaculture industry currently produces about 4% of the estimated 100,000 mt of fish consumed annually. The main bulk of foodfish production comes from marine coastal farms and some from land-based foodfish farms.

      The Agri-Food and Veterinary Authority of Singapore (AVA) is the national authority for aquaculture development for Singapore and manages aquaculture farms through the issuance of farm licenses. For marine foodfish farms, the farm licensee has to abide by good farm management guidelines to maintain the farm in good condition and ensure that the farm does not engage in activities that would pollute the farm waters. For land-based farms, there are also guidelines that address infrastructure layout, farming system and water treatment facilities. The latter requires that sedimentation ponds, reservoir ponds/tanks, supply and drainage systems, trade effluent treatment and sampling plant are included in the farm set-up.

      Aquaculture, as with all other food production practices, is facing challenges for sustainable development. An example of Singapore s contribution to sustainable aquaculture is through the development of technology for consistent and economical mass production of fish seeds under controlled conditions. This approach will alleviate the pressure on nature to provide the seeds for farming and would make available large numbers of quality fish for small and large-scale commercial aquaculture. AVA has established the Marine Aquaculture Centre (MAC) at St. John's Island to address the needs of aquaculture development for Singapore through fish reproduction and seed production technology development as well as large- scale fish farming technology development.

      At present, the fish reproduction technology research work involves closing the reproductive cycles of key marine food fish species and also fry production at a commercial scale. Closing the reproductive cycles will eliminate the reliance and alleviate the pressure on wild seed stock. Good quality brooders are selected, maintained and bred to produce quality fry, which would indirectly translate to better growth performances and shorter culture period. This, together with good farm management practices, will optimize the usage offish feeds during the culture cycle.

      AVA is looking into the use of vaccination for fish health management purpose, to reduce the reliance on prophylactic drugs in the future. Antibiotics or chemicals if not administered properly for treatment may have negative consequences. One of them is the presence of drug residues in aquatic products which has food safety and health concerns. Other issues include adverse effects on the environment such as build-up resistance of pathogens.

      In the past, the focus of attention in aquaculture management had been on increasing yield by culture practices, with a view to short-term economic viability. With the current rate of depleting marine resources, there is an urgent need to develop aquaculture in a sustainable way. Current efforts and future developments such as implementation of surveillance programmes, personnel training, fish nutrition and feeding, fish health, the establishment of good aquaculture practices, monitoring of the fish farming environment seawater re-use and information sharing will facilitate working towards the development of sustainable aquaculture in Singapore.