Now showing items 479-498 of 3272

    • Conference paper

      Cage and pen culture in Sri Lanka 

      DES Jayamaha - In Proceedings of the International Workshop on Pen Cage Culture of Fish, 11-22 February 1979, Tigbauan, Iloilo, Philippines, 1979 - Aquaculture Department, Southeast Asian Fisheries Development Center; International Development Research Centre
      Sri Lanka has about 300,000 acres of fresh water bodies in the form of irrigation tanks, hydropower reservoirs and flood lakes and about 300,000 acres of brackish water areas. This paper briefly describes present aquaculture development and future prospects with regard to pen and cage culture in Sri Lanka.
    • Conference paper

      Cage culture in Thailand 

      M Tangtrongpiros - In Proceedings of the International Workshop on Pen Cage Culture of Fish, 11-22 February 1979, Tigbauan, Iloilo, Philippines, 1979 - Aquaculture Department, Southeast Asian Fisheries Development Center; International Development Research Centre
      This paper briefly describes cage fish culture in Thailand with reference to the design and construction of cages and the species used in cage culture.
    • Conference paper

      Cage culture of Kappaphycus alvarezii (doty) doty and Epinephelus sp. 

      AQ Hurtado-Ponce - In PM Aliño (Ed.), Proceedings of the Second National Symposium in Marine Science, 5-7 November 1992, Mindanao State University, Tawi-tawi, Philippines, 1994 - University of the Philippines, Marine Science Institute
      Kappaphycus alvarezii seedlings were cultured in cluster, vertically and horizontally using nylon monofilament rope attached to a bamboo raft installed inside a 5 x 5 m floating cage. Juveniles of Epinephelus sp. were stocked as biological control to grazers.

      Specific growth rate (% increase in weight day-1) and production (g m-1 line-1) of Kappaphycus were determined every 45 days and production of Epinephelus was determined after 120 days. Specific growth rate of Kappaphycus alvarezii was significantly affected by the culture technique used. An average specific growth rate of 3.7 %, 3.8 % and 5.3 % was recorded when K alvarezii was cultured in clusters, vertically and horizontally in that order. Horizontal technique of culturing K alvarezii was significantly different from vertical and cluster techniques (DMRT = 0.05). Production (g m-1 line-1) of K. alvarezii ranged from 766 to 1,970, (in clusters), 1,110 to 1975 (vertically) and 1,204 to 1,533 (horizontally). These values were significantly affected by the culture month but insignificantly affected by culture technique (DMRT = 0.05). After 120 days of culture, mean weight of Epinephelus sp. was 297 g; % weight gain cage-1 was 233; survival rate = 68 %; fish production = 5 kg; and FCR = 6.
    • Article

      Cage culture of Kappaphycus alvarezii var. tambalang (Gigartinales, Rhodophyceae) 

      AQ Hurtado-Ponce - Journal of Applied Phycology, 1992 - Springer Verlag
      Kappaphycus alvarezii var. tambalang was cultured in a 3 × 3 m bamboo raft installed inside a 4 × 4 m floating net cage of Lates calcarifer (sea bass) broodstock at SEAFDEC Sub-station Igang, Guimaras, Philippines, from December 1989 to May 1990. Growth and production of K. alvarezii var. tambalang was influenced by the culture months. The highest growth rate and production were recorded in January and May, respectively, while the lowest growth rate and production were observed in March. Average growth rate (wet weight) ranged from 3.72 to 7.17% day-1, while production ranged from 575.5 to 2377 g m-1 line-1. A total production of approximately 123 t (fresh) or 37 t (dried) ha-1 in the 5-month harvest season was produced from this culture system. Cultivation ofK. alvarezii var. tambalang in cages is possible, which indicates that seaweeds can be grown with carnivorous finfish, a practice which is still untapped.
    • Article

      Cage culture of Oreochromis aureus and Oreochromis niloticus hybrids in Laguna Lake, Philippines. 

      AM Bautista, MH Carlos, BO Acosta & PB Valera - Journal of Aquaculture in the Tropics, 1988 - Taylor & Francis
      A reciprocal cross of male Oreochromis aureus and female Oreochromis niloticus were made to produce the hybrids stocked in cages in Laguna Lake, Philippines with and without feeding. The growth rates of the hybrids from the cross of female O. aureus and male O. niloticus were better than the other hybrids. From the first to the sixth culture months.

      The hybrids in terms of bulk weight per cage and percentage survival did not differ significantly. However, the average weight per fish was higher in the hybrids of O. aureus (female) x O. niloticus (male) than that of that of the original cross. The stocking density of 40/m3, supplemental feeding did not influence growth compared to the control.
    • magazineArticle

      Cage culture of sea bass in Malaysia 

      Southeast Asian Fisheries Development Center, Aquaculture Department - Aqua Farm News, 1994 - Aquaculture Department, Southeast Asian Fisheries Development Center
      The article discusses the cage culture practice of sea bass (Lates calcarifer) in Malaysia. Problems on feed and seed supply and overcrowding are also discussed. Despite these problems, seabass cage culture still continuously booms.
    • Book

      Cage culture of the giant freshwater prawn (Macrobrachium rosenbergii) 

      ML Cuvin-Aralar, EV Aralar & AG Lazartigue - 2011 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Series: Aquaculture extension manual; No. 50
      An extension manual describing biology, site requirement, grow-out operations, health management, harvest, post harvest handling and processing, and economic analysis.
    • Article

      Cage culture of the Pacific white shrimp Litopenaeus vannamei (Boone, 1931) at different stocking densities in a shallow eutrophic lake 

      MLA Cuvin-Aralar, AG Lazartigue & EV Aralar - Aquaculture Research, 2009 - Blackwell Publishing
      Postlarvae of Litopenaeus vannamei were acclimated and stocked in lake-based cages at the following stocking densities: 10, 20, 30 and 40 shrimp m−2. Another set of shrimp was stocked in concrete tanks as reference samples at 30 shrimp m−2. Significant differences were observed among stocking densities throughout the 95-day culture. The final weight at harvest decreased with increasing stocking density: mean weights of 23.3, 15.8, 13.0, 10.9 and 14.6 g for the 10, 20, 30, 40 shrimp m−2 and reference tanks were observed respectively. There were no significant differences in survival throughout the culture period, ranging between 69% and 77%. Daily growth rates (range: 0.11–0.24 g day−1) and specific growth rates (range: 3.54–4.34%) also differed significantly among stocking densities, both increasing with decreasing stocking density. The feed conversion ratio in the cages did not differ among the stocking densities, ranging from 1.53 to 1.65. The relationship between stocking density and mean individual weight at harvest followed the equation y=81.06x−0.54 (R2=0.938) and that of stocking density and production (in g m−2) is y=58.01x−0.46 (R2=0.834).
    • Conference paper

      Cage culture of tilapia in the Philippines 

      RD,I Guerrero - In Proceedings of the International Workshop on Pen Cage Culture of Fish, 11-22 February 1979, Tigbauan, Iloilo, Philippines, 1979 - Aquaculture Department, Southeast Asian Fisheries Development Center; International Development Research Centre
      A brief description of the cage culture of Tilapia is presented. References are made to: (1) the Tilapia species cultured; (2) the design and construction of floating cages; (3) the management and production of cages; (4) the economic analysis of cage culture systems; (5) prospects and problems.
    • Conference paper

      Cage fish culture in Nepal 

      RN Sharma - In Proceedings of the International Workshop on Pen Cage Culture of Fish, 11-22 February 1979, Tigbauan, Iloilo, Philippines, 1979 - Aquaculture Department, Southeast Asian Fisheries Development Center; International Development Research Centre
      This paper describes briefly cage fish culture in Nepal with reference to (1) the construction and design of cages; (2) the species used; (3) cage culture practices and results; (4) the economics of cage culture.
    • Book

      Cage nursery of high-value fishes in brackishwater ponds: seabass, grouper, snapper, pompano 

      J Madrones-Ladja, N Opiña, M Catacutan, E Vallejo & V Cercado - 2012 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Series: Aquaculture extension manual; No. 54
      This extension manual describes nursery pond requirements, nursery rearing procedures, common diseases of young marine fish, and economic analysis of cage nursery as an enterprise separate from hatchery and grow-out culture.
    • Conference paper

      Cambodia: mangrove-friendly aquaculture 

      S Sreymom - In JH Primavera, LMB Garcia, MT Castaños & MB Surtida (Eds.), Mangrove-Friendly Aquaculture : Proceedings of the Workshop on Mangrove-Friendly Aquaculture organized by the SEAFDEC Aquaculture Department, January 11-15, 1999, Iloilo City, Philippines, 2000 - Southeast Asian Fisheries Development Center, Aquaculture Department
      Cambodia has 435 km of coastline with 85,000 ha of mangrove forest. A big part of the mangrove area is in Koh Kong province (63,700) where intensive shrimp culture activity is also concentrated. Shrimp (Penaeus monodon) farms occupy 850 ha, producing 450 tons/yr (1995). But lately, production decreased by 20% due to diseases and self-pollution. The government has since placed restrictions on shrimp farming.
    • Conference paper

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

      C Da - 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
      The country s current national development plan (National Strategic Development Plan - NSDP) for 2006-2010 gives priority to addressing poverty alleviation and improving food security particularly of the rural farmers. In line with the NSDP s goal which is to ensure sustainable access to fisheries resources by the poor, the Fisheries Administration (FiA) of the Ministry of Agriculture, Forestry and Fisheries has drafted the Strategic planning framework for fisheries: 2009-2018, which considers small-scale aquaculture as one of the most important approaches.

      Based on the NSDP, FiA will focus on aquaculture development and aquatic resources management for poverty reduction of the rural families in the entire country as well as the medium and large scale aquaculture development. The family aquaculture plays an important role in securing the animal protein requirement and generating cash income in the rural areas of Cambodia. On the other hand, the medium and large scale aquaculture are targeted to provide opportunities for the export market since Cambodia has a lot of potential for developing large scale aquaculture production.

      FiA has strongly considered the strategies of NSDP important particularly in the present time when the population is increasing and the country cannot meet the fish protein requirements capture fisheries alone.
    • magazineArticle

      Can they be bred in captivity? 

      Southeast Asian Fisheries Development Center, Aquaculture Department - Aqua Farm News, 1992 - Aquaculture Department, Southeast Asian Fisheries Development Center
    • Conference paper

      Cannibalism among different sizes of tilapia (Oreochromis niloticus) fry/fingerlings and the effect of natural food 

      JB Pantastico, MMA Dangilan & RV Eguia - In RSV Pullin, T Bhukaswan, K Tonguthai & JL Maclean (Eds.), The Second International Symposium on Tilapia in Aquaculture, 1988 - Department of Fisheries, Bangkok, Thailand; International Center for Living Aquatic Resources Management, Manila, Philippines
      Experiments were conducted in jars, tanks and aquaria to determine the occurrence of cannibalism among 7 different size groups of Nile tilapia (Oreochromis niloticus ) fry and fingerlings. Cannibalism became more intense as the size difference increased. Big fry were less susceptible to cannabalism than small fry. On the other hand, bigger fingerlings were highly cannabalistic compared with smaller ones. This was evident as early as the first 10 minutes after stocking when fingerlings which usually stayed at the bottom moved swiftly towards the surface and swallowed the smaller fry.

      Availability of additional natural food in the growing medium affected survival of fry (mean weight = 9.3 mg) which were stocked with fingerlings (mean weight = 163.5 mg) in aquaria. Feeding with Spirulina proved more effective in reducing cannibalism than feeding with Navicula . After 5 days of rearing, fry survival was highest when fed with Spirulina (83.1%) followed by Navicula (16.6%) and the unfed control (5.6%).
    • Conference paper

      Capacity building initiatives of Winrock International on mud crab culture in the Caraga Region 

      J Nobillos, D Gudahl & J Orprecio - In ET Quinitio, FD Parado-Estepa & RM Coloso (Eds.), Philippines : In the forefront of the mud crab industry development : proceedings of the 1st National Mud Crab Congress, 16-18 November 2015, Iloilo City, Philippines, 2017 - Aquaculture Department, Southeast Asian Fisheries Development Center
      The paper presents the output of the capacity building initiatives of Winrock International on Mud crab culture in the Caraga Region, Philippines. The capacity building seminar included lectures on the mud crab biology, pond preparation, nursery and grow-out culture, fattening, and soft-shell crab farming. Identification of the various crab body parts, actual pond preparation, nursery and grow-out culture of crab were demonstrated after the series of lectures.
    • Meeting report

      Capacity of mangroves to process shrimp pond effluents. 

      JH Primavera - 2004 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Shrimp culture has been criticized for causing mangrove loss and discharging effluents laden with chemicals, organic matter and nutrients into waterways. Hence the SEAFDEC Council mandated SEAFDEC/AQD to undertake studies that integrate aquaculture with mangroves. Thus, the Mangrove-Friendly Shrimp Culture Project follows two models: (a) the use of mangrove forests as filters to process effluents from intensive culture ponds, and (b) aquasilviculture which integrates low-density culture of crabs, etc. with mangroves. Worldwide only a few projects to date have tested mangroves as nutrient filters, hence the need to focus on this property of mangroves.
    • Conference paper

      Capture, transport and domestication of adult milkfish, Chanos chanos 

      WE Vanstone, AC Villaluz, PE Bombeo & RB Belicano - In Proceedings of the International Milkfish Workshop Conference, May 19-22, 1976, Tigbauan, Iloilo, Philippines, 1976 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Methods used in the capture, transport and domestication of adult milkfish are described and illustrated.
    • Article

      Carbohydrate requirements of Penaeus monodon (Fabricius) juveniles 

      VR Alava & FP Pascual - Aquaculture, 1987 - Elsevier
      P. monodon juveniles with an initial mean weight of 0.62 g were fed isonitrogenous (45%) and isolipidic (10%) semi-purified diets containing 10, 20 and 30% trehalose, sucrose and glucose for 56 days. Shrimp fed the diet with 20% trehalose had the highest weight gain. Of the three types of sugar tested, shrimp fed diets containing trehalose and sucrose exhibited better weight gains than those fed glucose diets. A dietary sugar level of 20% resulted in the best weight gain whereas the 30% level gave the lowest weight gain.

      The survival of shrimp was also affected by the type of carbohydrate fed. Trehalose and sucrose diets promoted higher survival rates than glucose diets. The different types and levels of carbohydrates showed combined effects on the dry matter percentages of crude protein and total lipid. Trehalose and sucrose diets generally promoted increased protein deposition. Trehalose at 30% and sucrose at 20% depressed lipid content.
    • Conference poster

      Carbohydrate requirements of Penaeus monodon juveniles. 

      VR Alava & FP Pascual - In Y Taki, JH Primavera & JA Llobrera (Eds.), Proceedings of the First International Conference on the Culture of Penaeid Prawns/Shrimps, 4-7 December 1984, Iloilo City, Philippines, 1985 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Penaeus monodon juveniles (initial mean weight=0.62 g) were fed semi-purified diets containing 10, 20 and 30% trehalose, sucrose or glucose for eight weeks. Results showed that shrimps fed 20% trehalose gave the highest growth rate. Of the three types of sugars tested, trehalose promoted the best growth rates, followed by sucrose and glucose. When the level of sugar was considered, 20% gave the best growth rate and 30%, the lowest. The type as well as level of sugar greatly affected the body crude protein and body lipid (P < 0.01), while survival was mainly affected by type of sugar alone (P < 0.01). Trehalose and sucrose diets promoted better survival than glucose diets. A negative linear correlation (r = —0.70) between the body crude protein and body lipid was obtained.