Now showing items 1-7 of 7

    • Article

      The economics and marketing of cage-raised finfish and pen-raised mudcrab 

      DD Baliao, MA de los Santos & NM Franco - Aquaculture Engineering, 1998 - Society of Aquaculture Engineers of the Philippines, Inc.
      As part of the technology verification exercise for technologies developed through research, the economics and marketing aspects were investigated before such technologies can be extended to industry practitioners. These were done for groupers raised in marine fishcages, tilapia raised in fishcages set in farm reservoirs, and for mudcrabs raised in pens set in mangroves.
    • Book

      Grouper culture in brackishwater ponds 

      DD Baliao, MA de los Santos, EM Rodriguez & RB Ticar - 1998 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Series: Aquaculture extension manual; No. 24
      Groupers (Epinephelus) are cultured in the Philippines using tiny fry and juveniles caught from the wild. A SEAFDEC/AQD technology verification study on grouper pond grow-out culture resulted in high productivity and profitability, indicating that grouper culture could become another income source for the country. This aquaculture extension manual is intended as a guide for fishfarmers and aquaculturists, extensionists, and students of aquaculture. It covers the following areas: What are groupers?; Commercially important groupers; Source of fry or fingerlings; Common collection gears for fry/juveniles; Brackishwater pond culture -- pond specifications, site selection, pond preparation, nursery operation, grow-out culture, harvest, post-harvest; Growth, survival and feed efficiency performance of grouper reared in brackishwater pond; Economics; Marketing and transport; and, Diseases.
    • Article

      Low or partial discharge and closed-recirculating systems for the culture of shrimp [Penaeus monodon (Fabricius)] at several demonstration sites in the Philippines 

      DD Baliao & MA de los Santos - The Philippine Agricultural Scientist, 2011 - College of Agriculture, University of the Philippines Los Baños
      A series of verification runs on the farming of shrimp [Penaeus monodon (Fabricius)] using environment-friendly techniques was conducted in different pilot demonstration sites including privately owned farms in the Philippines from 2001 to 2005. Encouraging results were achieved using the low or partial discharge and closed-recirculating systems following the advanced environment-friendly protocols. In the low or partial discharge system, 11 grow-out ponds were stocked with P. monodon post larvae (PL) at densities between 15 and 25 m-2 while in the closedrecirculating system, eight grow-out ponds were stocked with PLs at densities between 30 and 60 m-2. Both systems incorporated the use of head and tail reservoirs, crop rotation, filter box, salinity reduction, long-arm paddlewheel aerators, biomanipulators, biofilters, sludge collectors and quality feeds.

      In the low or partial discharge system, an average total yield of 5.3 ± 0.8 tons ha-1, a feed conversion ratio (FCR) of 1.4 ± 0.3 and a survival rate of 86 ± 12 % were achieved after 109–159 d of culture (DOC). In a closed recirculating system, however, an average total yield of 8.3 ± 4.0 tons ha-1, FCR of 1.9 ± 0.2 and survival rate of 76 ± 15 % were achieved after 126–150 DOC.

      Analyses of effluents from grow-out ponds revealed that treatment using the tail reservoir with installed baffles and oysters (Crossostrea sp.) and seaweed (Gracilaria sp.) used as biofilters effectively reduced the dissolved organic nutrient concentration to optimum levels before the water was recycled or released to the surrounding body of water. Shrimps were observed to be growing and feeding normally, with no signs of bioluminescence at night, and no sluggish swimming behavior.
    • Article

      Mudcrab pen culture in mangroves 

      DD Baliao & MA de los Santos - Aquaculture Engineering, 1998 - Society of Aquaculture Engineers of the Philippines, Inc.
      Over the years, commercial production of mudcrab, Scylla spp, has been undertaken only in bamboo or net-fenced brackishwater ponds. Its feasibility was proven through series of verification trials conducted in commercial ponds by SEAFDEC/AQD researchers and is now being practiced elsewhere in the country.

      Of late, the introduction of using net enclosure to grow mudcrabs in mangroves or tidal zones offers a bright prospect in aquasilviculture. Using mangroves as natural resource, paves the natural way of creating livelihood among fisherfolk in the coastal areas. While this method is by far not very popular in the Philippines, the same has been carried out for quite some time in Indonesia, Malaysia, Viet Nam and China. The advantages of this method include low investment cost, ease of construction, environment-friendly and this project can be operated quickly.
    • Book

      Mudcrab, Scylla spp, production in brackishwater ponds 

      DD Baliao, MA de los Santos & NM Franco - 1999 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Series: Aquaculture extension manual; No. 28
      Mudcrab (Scylla spp) production in brackishwater ponds is now gaining popularity, especially in communities that need to supplement their income. The manual covers the following: Distribution; Grow-out operation in ponds - site selection, pond specification, pond preparation, source of juveniles, transport and stocking of juveniles, care of pond and stock, feeds and feeding, harvest, post-harvest; Production and profits; Cost and analysis. It is hoped that the manual will be of use to fishfarmers and aquaculturists, extensionists, and students of aquaculture not only in the Philippines but also in other mudcrab producing countries in Southeast Asia.
    • Book

      Net cage culture of tilapia in dams and small farm reservoirs 

      DD Baliao, MA de los Santos, NM Franco & NRS Jamon - 2000 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Series: Aquaculture extension manual; No. 30
      The manual describes the net cage of tilapia in dams and small farm reservoirs, which has been found to be a low-cost yet high-income earning farm activity and offers an excellent option as an alternative livelihood for poor inland fisherfolks. The following aspects are covered: 1) Characteristics of a suitable site; 2) Design of the net cages - the floating cage, the stationary/fixed cage; 3) Stocking the net cages - source of juveniles, stocking rate, stocking time, acclimation; 4) Management of the cages - feeds and feeding, monitoring activities; 5) Harvesting - partial harvest, total harvest; and, 6) Profitability analysis.
    • Book

      Pen culture of mudcrab in mangroves 

      DD Baliao, MA de los Santos & NM Franco - 1999 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Series: Aquaculture extension manual; No. 26
      This manual, describing the pen culture of mudcrab (Scylla spp) in mangroves, is intended for the use of fishfarmers and aquaculturists, extensionists, and students of aquaculture, not only in the Philippines but also in other mudcrab-producing countries in Southeast Asia. It covers the following: Site selection; Installation of net enclosure; Materials; Rearing operation; Feeds and feeding; Stock sampling; Water quality and pen management; Harvesting; and, marketing.