SEAFDEC Institutional Repository: Recent submissions
Now showing items 5021-5040 of 5909
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A new device for recording the feeding activity of milkfish
(The Japanese Society of Scientific Fisheries, 1981)Knowledge on the feeding activity is basic and very important for rearing fish. The information on the feeding activity rhythm of the animal suggests the proper time to feed it. Many devices have been designed to record ... -
Viability of frozen algae used as food for larval penaeids
(Fisheries Research Society of the Philippines, 1981)Freezing with added chemicals as flocculants and protectants as means of preserving stock cultures was tried with four species commonly used as larval food. The species were Chaetoceros calcitrans, Skeletonema costatum, ... -
Effect of different stocking combinations on growth, production and survival of milkfish (Chanos chanos Forskal) and prawn (Penaeus monodon Fabricius) in polyculture in brackishwater ponds
(Elsevier, 1981)Milkfish (Chanos chanos) and prawn (Penaeus monodon) were stocked in 500 m2 earthen ponds from 12 November 1978 to 15 March 1979 at the following combinations: 2000 milkfish fingerlings per ha (treatment I); 2000 milkfish ... -
Acute toxicity of un-ionized ammonia to milkfish (Chanos chanos) fingerlings
(Fisheries Research Society of the Philippines, 1981)The acute toxicity of un-ionized ammonia to milkfish (Chanos chanos) fingerlings was determined using a static bioassay system. The 24-, 48-, 72-, and 96-hr LC50 values were calculated at 25.74 ppm NH3-N ... -
Developmental and ecological stages in the life history of milkfish Chanos chanos (F.)
(Fisheries Research Society of the Philippines, 1981)Seven stages in the life history of milkfish Chanos chanos are suggested: embryonic, yolksac larval, larval, postlarval, juvenile, sub-adult and adult stages. These were based on morphological differences and on their ... -
Pigmentation pattern in the early developmental stages of milkfish (Chanos chanos): A key for larval identification.
(Fisheries Research Society of the Philippines, 1981)Pigmentation patterns are presented for 5 - 20 day old milkfish (Chanos chanos) and are discussed in terms of their use in larval identification. -
Survival, growth and production of Penaeus monodon Fabricius at different stocking densities in earthen ponds with flow-through system and supplemental feeding.
(Fisheries Research Society of the Philippines, 1981)Penaeus monodon juveniles (P53-P54, 0.45 g) were stocked in 200 m2 earthen ponds with water exchange rate of 5-10% daily, and reared for 3.5 months. Stocking density levels of 2.5, 5.0, 10 ... -
Feeding behavior and food preference of Penaeus monodon Fabricius with scrap Tilapia mossambica
(Fisheries Research Society of the Philippines, 1981)The time of day during which P. monodon feeds at different depth levels in earthen ponds, and its preference for three types of tilapia feeds (dry, fresh and fermented) were determined. It was observed that P. monodon ... -
The skull of milkfish, Chanos chanos Forsskal
(Japanese Society of Systematic Zoology, 1980)The skull of the milkfish, C. chanos, is described so that it may be used as a tool in identifying the effect of artificial propagation in terms of skeletal malformations. -
The effects of feeds and feeding levels on the survival of a prawn, Penaeus monodon larvae
(Kagoshima University Research Center for the South Pacific, 1980)Penaeus monodon larvae were grown from zoea1 to mysis2 stages using varying levels of single-celled Chaetoceros sp., baker's yeast, and a combination of the two. The effects of feeds and feeding on ... -
Studies on the fungal diseases in crustaceans. II. Haliphthoros philippinensis sp. nov. isolated from cultivated larvae of the jumbo tiger prawn (Penaeus monodon)
(Mycological Society of Japan, 1980)Haliphthoros philippinensis sp. nov., isolated from larvae of P. monodon is described and illustrated as new. The fungus grew at a temperature range of 13.5-36.3 C, with the optimum of 29.3-34.5 C. Growth occurred in ... -
Rearing of the larval stages of prawn, Penaeus japonicus Bate, using artificial diet.
(Kagoshima University Research Center for the South Pacific, 1980)Survival and growth rates of the zoeal and mysis stages of the prwn, Penaeus japonicus Bate, were studied using natural and artificial diets. The highest survival rate, 34.2%, was obtained in the larvae fed with the ... -
Preliminary studies in some aspects of amino acid biosynthesis in juveniles of Penaeus monodon Fabricius: II. Partial purification and characterization of muscle L-glutamate dehydrogenase
(The Philippine Biochemical Society, 1980)A method of partially purifying L-glutamate dehydrogenase, a key enzyme in the biosynthesis of non-essential amino acids, from the muscle of P. monodon juveniles is presented. Enzyme extraction with Tris-acetate buffer, ... -
Preliminary studies in some aspects of amino acid biosynthesis in juveniles of Penaeus monodon Fabricius: I. Incorporation of 14C from (U-14C) acetate into amino acids to precipitable proteins
(Philippine Biochemical Society, 1980)Ion-exchange chromatography in conjunction with radioisotope labelling techniques were used to investigate the incorporation of 14C from (U-14C) - acetate into amino acids of precipitable proteins in ... -
Occurrence of milkfish, Chanos chanos (Forsskal) eggs around Panay Island, Philippines
(The Faculty of Fisheries, Nagasaki University, 1980)A total of 551 milkfish eggs was collected by horizontal tows with a fish larval net in the waters around Panay island during the period from April 1976 to June 1979. The maximum number obtained by a single tow was 33 eggs. ... -
Microsporidian parasite of the white prawn Penaeus merguiensis de Man: A preliminary report
(University of the Philippines, 1980)Electron microscopy of the ovary of the white prawn, Penaeus merguiensis De Man reveals the presence of the different stages in the life cycle of a species of microsporidia. This is the first such report of microsporidian ... -
Fishing methods and gears in Panay Island, Philippines
(Faculty of Fisheries, Kagoshima University, 1980)The authors surveyed the fishing methods and gears in Panay and smaller neighboring islands in the Philippines in September-December 1979 and in March-May 1980. This paper is a report on the fishing methods and gears used ... -
Effects of different sex ratios on maturation, fecundity and hatching rates of ablated Penaeus monodon wild stock
(Fisheries Research Society of the Philippines, 1980)The minimum number of males per female that would still ensure high maturation, fecundity and hatching rates in Penaeus monodon broodstock, is determined. Wild stock P. monodon were stocked in 4 m diameter circular tanks ... -
Effect of various salinity levels and stock manipulation methods on the survival of milkfish fry (Chanos chanos) during storage.
(Fisheries Research Society of the Philippines, 1980)The survival and growth of milkfish (Chanos chanos ) fry stored in plastic basins at different salinity levels and stock manipulation methods without aeration and fed with hard-boiled chicken egg yolk over a period of 14 ... -
Effect of substrate types on fecundity and nauplii production of ablated Penaeus monodon Fabricius
(Science and Technology Information Institute, Department of Science and Technology, 1980)The survival, spawning, fecundity, and nauplii production of ablated Penaeus monodon females reared in flow-through broodstock tanks with white coralline and black sand substrates for 62 days, were assessed. Prawns exposed ...
