Browsing Quarterly Research Reports by Title
Now showing items 6-25 of 125
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Bacteria from seawater used in Penaeus monodon larval cultures
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Bacteria in the seawater used in P. monodon hatchery operations were isolated on Bachmann's agar. The total plate counts in 25 isolations ranged from 1.0 - 5.0 x 102 to 5.1 -10.0 x 105 cells per ml. ... -
Bioenergetics of the freshwater prosobranch Idiopoma angularis Muller in Laguna de Bay
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)This study was made as an attempt to investigate some of the ecological aspects of the freshwater snail Idiopoma angularis Muller in a modern framework of energy flow and mathematical models. It offers the first investigation ... -
The biology and control of Caligus sp., an ectoparasite of the adult milkfish Chanos chanos Forskal
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)One unidentified species of copepod belonging to the genus Caligus of the family Caligidae was found to infest the adult milkfish broodstock. To control the parasites infesting the adult milkfish, tests were made using the ... -
Biology and farming of the green mussel Mytilus smaragdinus
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Biological investigations were carried out in Sapian Bay, Capiz from November 1975 to December 1976 with samplings conducted fortnightly. Histological studies on the gonad reveal a high percentage of ripe and spent females ... -
Catch composition of penaeid prawns caught with fish corrals at Batan Bay, Philippines
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1979) -
Changes in length and weight of milkfish fry preserved in formalin
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1978)Fry shrank immediately after they were preserved in formalin, but from the second week onwards shrinkage was almost nil. Fry in freshwater formalin solutions shrunk less than those in seawater formalin solutions. It is ... -
A comparative study of various extenders of milkfish, Chanos chanos (Forsskal) sperm preservation
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1980)Four chemical extenders in 7 different concentrations (potassium chloride, sodium chloride, glucose, sodium citrate, Ringer s solution, cow serum and milkfish (Chanos chanos) serum) were compared in the preservation of ... -
A comparison between the catching efficiency of two milkfish fry collecting gears and their respective modifications
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1980)An experiment was conducted along the shore of Culasi, Antique in Panay to compare the milkfry (Chanos chanos) catching efficiency of the ordinary fry seine against its innovation and the ordinary sweeper against its 2 ... -
Courtship and mating behavior in Penaeus monodon Fabricius
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1978)An illustrated description is given of the courtship and mating behaviour of P. monodon. Courtship and mating follow three distinct phases: (1) parallel swimming of male and female from the bottom to a height of 20-40 cm ... -
Culture experiments on the copepod, Tisbintra elongata MORI, and evaluation of that species as food organism for milkfish larvae
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1979)Five types of food were used to culture T. elongata: rice bran, cow dung, bread, cow dung, bread yeast, fermented fish solubles and Spirulina. Bread yeast was found to give the highest densities. An evaluation was also ... -
Culture of grey mullet, Mugil cephalus, Linnaeus in brackishwater ponds at two stocking densities
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1981)The culture potential of hatchery-produced grey mullet (Mugil cephalus , Linnaeus) stocked with average weight of 3.7 g and at 2,500 (treatment I) and 3,000 (treatment II) fingerlings/ha in six 350m brackishwater ponds ... -
Culture of the mud crab, Scylla serrata (Forskal) at different stocking densities in brackishwater ponds
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1981)The mean weight percentage survival, relative growth increment, net production and feed conversion value of S. serrata stocked in monoculture at different stocking densities are presented. -
Developmental and ecological stages in the life history of milkfish Chanos chanos Forsskal
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1980)Seven stages in the life history of the milkfish C. chanos , are recognized and suggested: A, embryonic; B, yolksac larval; C, larval; D, postlarval; E, juvenile; F, subadult; G. adult. An outline is presented of the life ... -
Diel fluctuations in catch of the postlarval Penaeus japonicus group
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1979)Experiments were undertaken in order to measure the diel fluctuations in the catch of the post-larvae of P. japonicus in relation to the tidal cycles, light conditions and water temperature. The fluctuations are discussed ... -
Dietary crude protein requirement of Tilapia nilotica fry
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1981)To determine growth and survival of Tilapia nilotica fry fed formulated practical dry diets with varying crude protein levels, fish were subjected to 3 seperate feeding trials. Isocaloric practical diets containing 20, 25, ... -
Ecology and life history of penaeid shrimps
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Fourteen species of penaeid shrimps with commercial value in Batan Bay and Tigbauan-Guimbal waters were identified as follows: Penaeus monodon, P. semisulcatus, P. japonicus, Metapenaeus ensis, M. burkenroadi, M. endeavouri, ... -
The effect of different binders on the water stability of feeds for prawn
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1978)Corn starch, gelatin, sago palm starch, agar, and bread flour were tested for their binding capacity in pelleted diets for Penaeus monodon . Agar was found to be good binder, but it costs too much, while bread flour was ... -
Effect of different feeding regimes on reproduction and survival of ablated Penaeus monodon Fabricius
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1979)Results of experiments conducted on ablated Penaeus monodon, fed with 4 different feeds (pellet-pellet, mussel-mussel, mussel-pellet and squid-pellet), on survival, spawning, fecundity and hatching rate are given and discussed. -
Effect of different light intensities on the growth of the diatom Chaetoceros calcitrans
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Batch cultures of C. calcitrans were maintained indoors at a temperature range of 21 to 25 C and continuously illuminated by 40-watt daylight fluorescent lights. Cultures were exposed to 5 different intensities from 200 ... -
Effect of different sex ratios of ablated wild-stock Penaeus monodon Fabricius on maturation, fecundity and hatching rates
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1979)