Now showing items 1-15 of 15

    • 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

      Effects of temperature on behavior, growth, development and survival in young milkfish, Chanos chanos (Forskal) 

      AC Villaluz & A Unggui - Aquaculture, 1983 - Elsevier
      Effects of three temperature treatments on activity, feeding, growth, development and survival of young milkfish (Chanos chanos) were investigated. Low temperature (<22.6°C) and hypoxial condition (<1 ppm O2) decreased activity, responsiveness and food intake; high temperature (up to 33°C) had the opposite effect. Growth and development were fastest in fish maintained in high temperature (x = 29.5°C). Fish in low temperature (x = 20.7°C) had the least growth and were inhibited from developing into juveniles during the 3-month period. Highest survival (x = 99.7%) was obtained in high temperature but was not significantly different (P>0.05) from ambient temperature (x = 97.7%).
    • Book chapter

      Fry and fingerling collection and handling 

      AC Villaluz - In CS Lee, MS Gordon & WO Watanabe (Eds.), Aquaculture of milkfish (Chanos chanos): State of the Art, 1986 - The Oceanic Institute
      A review is made of methods and practices of collection, storage, transport and acclimation of milkfish (Chanos chanos ) fry and fingerlings in various countries. Factors affecting catch and survival are examined.
    • Book

      How to transport and acclimate prawn fry 

      RA Tenedero & AC Villaluz - 1985 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Series: Aquaculture technology series / SEAFDEC Aquaculture Department; No. 2
      The manual describes the procedures and techniques to follow for short and long duration transport of prawn fry. Regulations for acceptance and handling of wet shipment and the acclimation of the fry are also covered.
    • Book

      Important fish and shrimp fry in Philippine coastal waters : identification, collection and handling 

      TU Bagarinao, NB Solis, WR Villaver & AC Villaluz - 1986 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Series: Aquaculture extension manual; No. 10
    • Article

      Larvae of decapod crustacea of the Philippines - I. The zoeal stages of a swimming crab, Charybdis cruciata (Herbst) reared in the laboratory 

      H Motoh & AC Villaluz - Nippon Suisan Gakkai Shi. Bulletin Of The Japanese Society Of Scientific Fisheries, 1976 - The Japanese Society of Scientific Fisheries
      Six zoeal stages of Charybdis cruciata (Herbst) which are reared in the laboratory, are described. The zoea has a rostral, a dorsal and a pair of laterial spines. There are a pair of lateral hooks on the 2nd and 3rd abdominal segments. The number of natatory hairs on the rirst and second maxillipeds increased by one pair at each molt, being 4, 6, 8, 10, 12 and 14, in the 1st to 6th zoea, respectively. The number of inner setae on the telson are 3+3 in stage 1; 4+4 in stages 2 and 3, 4+1+4 in stage 4, and 5+5 in stages 5 and 6. Spinal arrangement form proximal to distal segment of the endopodite of the first maxillipeds are 2-2-0-2-5 in stages 1-3 and 2-2-1-2-6 in stages 4-6 and that of the second maxillipeds are 1-1-4 in stages 1 and 2 and 1-1-5 in stages 3-6.
    • Article

      Meristic variations in milkfish Chanos chanos from Philippine waters 

      AC Villaluz & HR MacCrimmon - Marine Biology, 1988 - Springer Verlag
      Variations in meristic characters occur within and between samples of milkfish Chanos chanos (Forsskal) collected on June 1977 from five localities in Philippine waters. The unbranched anal and ventral fin rays are the most plastic, and vertebral number is the most stable of nine meristic characters examined. The number of ventral fin rays is the only meristic feature which differed consistently enough to suggest distinct population groups: South China Sea, comprising samples from Ilocos and Panay Island; Pacific Ocean from Bicol; and Celebes Sea, from Zamboanga and Davao. A discriminant analysis which incorporated generalized distance (Mahanalobis D2) and percent overlap of a reduced set of characters indicated several morphometric subgroups of milkfish in Philippine waters, although geographic subgroups were not clearly demonstrated.
    • Technical Report

      Milkfish fry and fingerling industry of the Philippines: methods and practices 

      AC Villaluz, WR Villaver & RJ Salde - 1983 - Aquaculture Department, Southeast Asian Fisheries Development Center; International Development Research Centre
      Series: Technical report / SEAFDEC Aquaculture Department; No. 9
      Milkfish fry catch from Philippine waters can still be increased. Intensified collections in traditional fry grounds and exploitation of new areas may lead to a reduction of adult stock and the possible collapse of the milkfish fry fishery. The implementation of rational conservation and management measures are of immediate concern not only to increase the productivity and number of fry grounds but also to conserve this important aquatic resource.

      The present methods of catching milkfish fry involve fry filtration by mobile or stationary devices. The design, construction, area and time of operation of the gears are primarily dictated by the bottom topography of the fry grounds, wind direction, local current patterns and tidal fluctuations.

      Catching, handling, storage and transport activities expose the fish to undue stress which contribute to poor survival. The simple method of lowering the salinity of the water medium considerably reduces mortality.

      High mortality in nursery ponds has aggravated the seed shortage problem of the milkfish industry. The development of an efficient mass-production technology in rearing milkfish fry to fingerlings and in stunting fingerlings for longer periods could offer the solution not only in meeting the requirements for milkfish seed but also provide part of the fry requirements of other countries in the region.
    • Article

      Milkfish fry and fingerling resources of Sri Lanka 

      AC Villaluz, HP Amandakoon & A de Alwis - Journal of Inland Fisheries, 1982 - Ministry of Fisheries and Aquatic Resources
      Sri Lanka has the milkfish (Chanos chanos) seed and water resources for the development of milkfish aquaculture as a new industry. Milkfish fry and fingerlings are present in all surveyed coastal wet lands, but are abundant in Mannar and Puttalam regions. The species enter tidal pools as larvae and develop into juveniles of about 50 mm. FL in one month. The fry and fingerlings are caught with seine net in tidal pools, transported in plastic bags and stocked in ponds and/or lakes. Mortality ranges 2-100% during transport; 2-15% during acclimatization; and 40-50% after 3 weeks in holding tanks. Careful handling and the application of appropriate transportation, acclimatization and nursing procedures would reduce mortality considerably.
    • Book

      Milkfish production and processing technologies in the Philippines 

      WG Yap, AC Villaluz, MGG Soriano & MN Santos - 2007 - WorldFish Center
      This publication describes the various aspects of milkfish production in the Philippines. It covers these areas 1) technology development from a historical perspective, 2) milkfish seed production 3) grow-out in brackishwater ponds 4) grow-out in pens and cages 5)milkfish processing.
    • Conference paper

      Morphological measurements, gonadal development and estimated age of adult milkfish, Chanos chanos captured in Pandan Bay from 10 May - 16 June, 1975 

      LB Tiro Jr., AC Villaluz & WE Vanstone - In Proceedings of the International Milkfish Workshop Conference, May 19-22, 1976, Tigbauan, Iloilo, Philippines, 1976 - Aquaculture Department, Southeast Asian Fisheries Development Center
      From 10 May to 16 June, 1975, 106 adult milkfish were captured in an otoshi-ami 500 meters offshore. Of the 106 specimens, 37 were females in various stages of gonadal development or spent and 69 were males of which 41 were sexually mature. The age of these fishes were estimated to be between 3 and 5 years.
    • Conference paper

      The occurrence of milkfish Chanos chanos fry in Pandan Bay, Antique, from 21 May to 25 June, 1975 

      S Kumagai, AC Villaluz, LB Tiro Jr. & WE Vanstone - In Proceedings of the International Milkfish Workshop Conference, May 19-22, 1976, Tigbauan, Iloilo, Philippines, 1976 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Milkfish fry were collected at the Pandan shoreline and 500 meters offshore. While shore-caught fry were uniform in size those captured offshore varied in size and stage of development.
    • Conference paper

      Qualitative analysis of the contents of the anterior portion of the oesophagus from adult milkfish, Chanos chanos, captured in Pandan Bay from 10 May-June 1975 

      AC Villaluz, LB Tiro, LM Ver & WE Vanstone - In Proceedings of the International Milkfish Workshop Conference, May 19-22, 1976, Tigbauan, Iloilo, Philippines, 1976 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Qualitative analysis of food items in the anterior spiral portion of the oesophagus suggests that adult milkfish feed on both benthic and planktonic materials.
    • Conference paper

      Spawning of milkfish, Chanos chanos, in captivity 

      WE Vanstone, AC Villaluz & LB Tiro Jr. - In Proceedings of the International Milkfish Workshop Conference, May 19-22, 1976, Tigbauan, Iloilo, Philippines, 1976 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Newly captured milkfish released 0.8 mm in diameter non-hydrated eggs spontaneously in captivity. After injection with partially purified salmon gonadotropin (SG-G100), 1.2 mm in diameter hydrated eggs were released. These eggs, however, were not fertilized.