SEAFDEC Institutional Repository: Recent submissions
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Daily variations in plasma hormone concentrations during the semilunar spawning cycle of the gulf killifish, Fundulus grandis
(Wiley-Liss, 1991)Male and female gulf killifish, Fundulus grandis, were kept in large cages submerged in their natural habitat in the Gulf of Mexico. Gonadosomatic indices (GSI: 100 × gonad weight/body weight) and blood samples were ... -
Selective diversification of aquaculture stocks: A proposal for economically sustainable genetic conservation
(NRC Research Press, 1991)The genetic diversity of aquaculture stocks can be maintained, and their genetic impact on wild stocks minimized, by breeding programmes that deliberately generate genetic diversity. Current animal breeding practices are ... -
Assessment of stocks of a natural Gracilaria population on Panay Island, Philippines
(Walter de Gruyter, 1991)Two peaks in biomass were recorded from natural beds of Gracilaria sp. at Leganes, Iloilo and Batan, Aklan study sites. The major peak occurred in February 1989 for both areas. The minor peak occurred in September 1988 at ... -
Accumulation and tissue distribution of radioiodine (131I) from algal phytoplankton by the freshwater clam Corbicula manilensis
(Springer Verlag, 1991)Radioactive wastes discharged from establishments involved in the use of radioisotopes such as nuclear powered industries, tracer research and nuclear medicine are a potential public health hazard. Such wastes contain ... -
Mercury and selenium interaction: A review
(Elsevier, 1991)This paper reviews studies on mercury and selenium interaction. It includes the effects of selenium on mercury toxicity on the organism, organ/tissue, and subcellular levels. The paper also touches on possible mechanisms ... -
Growth and fatty acid composition of Penaeus monodon juveniles fed various lipids
(Society of Israeli Aquaculture and Marine Biotechnology, 1991)A 4-week feeding trial was conducted to determine the growth and fatty acid composition of Penaeus monodon juveniles fed dietary lipids from different sources. The animal lipid (cod liver oil, pork lard and beef tallow) ... -
Effect of dietary lipid sources on growth, survival and fatty acid composition of sea bass (Lates calcarifer, Bloch) fry
(Society of Israeli Aquaculture and Marine Biotechnology, 1991)Soybean oil, cod liver oil and coconut oil were tested singly or in combination (1:1) as a source of dietary lipid for sea bass fry. Growth and survival rates of fry fed a diet containing cod liver oil and soybean oil (1:1 ... -
Effects of Gusathion A on the survival and shell quality of juvenile Penaeus monodon
(Elsevier, 1991)Juvenile Penaeus monodon (body weight=10–20 g) were exposed to a commonly used organophosphate pesticide, Gusathion A, in ponds for 96 h. Prawns exposed to 1.5–150 ppb Gusathion A had 27–53% shell softening, with a 96 h ... -
Food value of Brachionus plicatilis fed three selected algal species as live food for milkfish, Chanos chanos Forsskal, fry production
(Blackwell Publishing, 1990)The effects of three selected algal species, Tetraselmis tetrahele, Isochrysis galbana and marine Chlorella sp. on the population growth of Brachionus plicatilis was evaluated after 3, 5 and 7 days of culture. The rotifers ... -
The effects on growth and survival of feeding water fleas (Moina macrocopa Straus) and rotifers (Brachionus plicatilis ) to milkfish (Chanos chanos Forsskal) fry
(Society of Israeli Aquaculture and Marine Biotechnology, 1990)The effects of feeding water fleas, Moina macrocopa Straus, and rotifers, Brachionus plicatilis, to milkfish, Chanos chanos Forsskal, fry at different feeding rates and frequencies were investigated. Fry (4.66 mg average ... -
Evaluation of the salinity tolerance of Oreochromis mossambicus, O. niloticus and their F1 hybrids
(Elsevier, 1990)The salinity tolerance of freshwater-spawned and reared Oreochromis mossambicus, O. niloticus and their F1 hybrids of various ages was studied. Several tests were conducted using three indices as practical ... -
Growth performance of Penaeus monodon in lablab, lumut, and digman ponds under various farm practices
(Taylor & Francis, 1990)The influence of lablab, lumut (filamentous algae), and digmaan (Najas graminea) on the growth of prawns as associates of natural food biomass in brackishwater ponds was investigated. Ponds, each grown with the above ... -
Cryopreservation of the euryhaline rotifer Brachionus plicatilis embryos
(Elsevier, 1990)A method for the separation and cryopreservation of Brachionus plicatilis embryos is described. Juveniles with uniform development were collected from a cultured stock by passing them through a series of nets. Collected ... -
Uptake and some physiological effects of mercury on water hyacinth, Eichhornia crassipes (Mart) Solms.
(SEAMEO, 1990)The uptake and growth effects of mercury (Hg) on Eichhornia crassipes under field conditions and with lakewater as cultural medium were investigated. Absorption of the heavy metal increase with higher levels of Hg in the ... -
Ion chromatography of nitrite, bromide and nitrate ions in brine samples using a chloride-form anion-exchange resin column
(Elsevier, 1990)In aquaculture research, maintenance of water culture quality is of great importance. Recent improvement in fishpond management and fish culture systems, such as intensive feeding and fertilization, have created complex ... -
Polymethylolcarbamide as binder of prawn diets
(Fisheries Research Society of the Philippines, 1990)The binding effect of polymethylolcarbamide (PMC) at the levels 0.5% and 1.0% of a practical diet was compared to that of the other binders such as kappa-carrageenan, sodium alginate, carboxymethylcellulose, cornstarch and ... -
Effect of dietary protein and energy level on growth, protein utilization and carcass composition of rabbitfish, Siganus guttatus
(Elsevier, 1990)Six semipurified diets comprising three levels of protein (25, 35, 45% of dry matter) each at two levels of estimated energy (3161, 3832 kcal/kg) were fed to fry for 8 weeks in 250-l tanks at a stocking density of 80 ... -
The macronutrient composition of natural food organisms mass cultured as larval feed for fish and prawns
(Society of Israeli Aquaculture and Marine Biotechnology, 1990)The macronutrient composition of natural food organisms that are mass cultured as feed for the larval stages of fish and prawns in the SEAFDEC Aquaculture Department was determined by chemical analysis. The food organisms ... -
Tissue lipid content and fatty acid composition of Penaeus monodon Fabricius broodstock from the wild
(Wiley-Blackwell, 1990)Tissues (hepatopancreas, muscle, gonad) of wild Penacus mordon females with ovaries in different stages of development and males were analyzed for Upid content and fatty acid composition. Hepatopancreatic tissue had the ... -
Occurrence of luminous bacterial disease of Penaeus monodon larvae in the Philippines
(Elsevier, 1990)Larval mortalities associated with luminescence have been observed in epizootic proportions in black tiger prawn (Penaeus monodon) hatcheries in Panay Island, Philippines. Luminescent vibrios, identified as Vibrio harveyi ...
