SEAFDEC Institutional Repository: Recent submissions
Ipinapakita ngayon ang mga item 5001-5020 ng 5909
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Gonadotropin profiles in serum of milkfish treated with salmon pituitary homogenate
(University of the Philippines Los Baños, 1983)Serum gonadotropin (GtH) levels were determined by radioimmunoassay (RIA) in adult regressed milkfish injected or implanted with various doses of salmon pituitary homogenate (SPH). Gonadotropin profiles of injected or ... -
The mechanics of mass occurrence and recruitment strategy of milkfish Chanos chanos (Forsskal) fry in the Philippines
(Kagoshima University Research Center for the South Pacific, 1983)The daily and hourly catch of milkfish Chanos chanos (Forsskal) fry in the coast of Hamtic, Panay Island in the Philippines was recorded over a period of 16 weeks, and correlated with time, location, types of gear, and ... -
Intestinal glucose transport in carnivorous and herbivorous marine fishes
(Springer Verlag, 1983)The influx and transepithelial movements of glucose and their effects on the electrophysiology and Na transport in upper and lower intestines of the herbivorous surgeonfish, Acanthurus mata , and carnivorous eel, Gymnothorax ... -
The visual feeding threshold and action spectrum of northern anchovy (Engraulis mordax) larvae
(California Cooperative Oceanic Fisheries Investigations, 1983)The visual feeding threshold and action spectrum of 10-15-mm northern anchovy larvae were determined, using as criterion the incidence of two or more rotifers in the guts of 50% of larvae tested under different spectral ... -
The quantitative dietary protein requirements of Penaeus monodon juveniles in a controlled environment
(Elsevier, 1983)Penaeus monodon juveniles (average weight = 1.32 g) were kept in individual 2 l perforated plastic containers, 10 of which were placed in each of the twenty-four 50 l rectangular wooden-glass aquaria supplied with seawater ... -
Seasonal variation in food and feeding of Penaeus monodon Fabricius (Decapoda, Natantia)
(E.J. Brill, 1982)A preliminary study on feeding habits of P. monodon F. (cf. Marte, 1980) indicated seasonal variations in feeding in this species. Similar observations have been reported for P. aztecus Ives and P. duorarum Burkenroad. The ... -
In vitro effect of fungicides on hyphal growth and sporogenesis of Lagenidium spp. isolated from Penaeus monodon larvae and Scylla serrata eggs.
(Blackwell, 1982)The sensitivity of Lagenidium spp. isolated from Penaeus monodon and Scylla serrata to 34 antimycotic compounds was determined. Mycostatic effects were evaluated from observations of chemicals on the development of vesicles, ... -
Gill lesions associated with acute exposure to ammonia.
(University of the Philippines, 1982)The histopathological effects of the 96 hr LC50 at 20.65 ppm NH3-N on the gills of milkfish fingerlings were examined qualitatively. Lesions observed were hypertrophy, hyperplasia, fusion of the ... -
Vertical diurnal migration of Daphnia cucculata and Eudiaptomus graciloides in eutrophic Frederiksborg Castle Lake, Denmark
(University of the Philippines at Los Baños, 1982)In euthrophic Frederiksborg Castle Lake, Berg & Nygaard were the first to study vertical migration. They obtained water samples at various time intervals over several days and concluded that the bulk of the population of ... -
Studies on the digestive proteases of the milkfish Chanos chanos
(Springer, 1982)The protease activity of crude extracts from various organs of the digestive tract of two groups of milkfish was determined. One group (Sample A) derived their food from ponds that had predominantly unicellular algae while ... -
Ascorbic acid sulfate sulfohydrolase (C2 sulfatase): the modulator of cellular levels of L-ascorbic acid in rainbow trout.
(National Academy of Sciences of the United States of America, 1982)The enzyme L-ascorbic acid 2-sulfate sulfohydrolase (C2 sulfatase) was purified from rainbow trout liver. The enzyme catalyzes the hydrolysis of L-ascorbic acid 2-sulfate and has a pH optimum at 6.0. It has a molecular ... -
Developmental stages of a microsporidian parasite of the white prawn, Penaeus merguiensis de Man 1888
(University of the Philippines, 1982)A microsporidian parasite found to invade the ovaries of the white prawn, Penaeus merguiensis de Man, 1888, causes the whitening of the mature female gonads. Ultrastructure examination of the white ovaries reveal the ... -
Histopathology of microsporidian infection in white prawn, Penaeus merguiensis de Man, 1888.
(University of the Philippines, 1982)Different stages of the white prawn, Penaeus merguiensis de Man, were examined for microsporidian infection. The parasite was found only in adult female prawns exhibiting white instead of the normal olive-green ovaries. ... -
Effect of light quality and eyestalk ablation on ovarian maturation in Penaeus monodon
(University of the Philippines Los Baños, 1981)Prawns were subjected to the following treatments: blue light, red light, natural light, and natural light plus unilateral eyestalk ablation. Unablated prawns under blue and natural light developed stage III ovaries; under ... -
An assessment of algal growth in net cages in Laguna Lake
(Fisheries Research Society of the Philippines, 1981)Quantitative determination of the algal population, in terms of cells/ml and biomass/ml, was conducted during the first month of growing P. monodon postlarvae in Laguna Lake. Algae were sampled from each side of net cages ... -
A comparison of two prawn (Penaeus monodon ) brood stock systems—land–based tanks and marine pens
(World Aquaculture Society, 1981)The paper compares two prawn (Penaeus monodon) brood stock systems—land-based tanks and marine offshore pens. Construction costs and annual maintenance and operating costs total US\$1,430 and \$2,550 for the tank and \$1,500 ... -
Lactate dehydrogenase isozyme patterns during the development of milkfish, (Chanos chanos (Forskal))
(University of the Philippines at Los Baños, 1981)Polyacrylamide disc gel electrophoresis was done to determine the lactate dehydrogenase (LDH) isozyme patterns for fry (5-3 mg), fingerling (6-12 g), pond-size (150-250 g) and adult (6-9 kg) milkfish. The patterns were ... -
The hydraulic control structure: A threat to the fishpen industry in Laguna de Bay.
(Natural Resources Management Center, 1981) -
Identification of postlarvae of the genus Penaeus appearing in shore waters
(Carcinological Society of Japan, 1981)Diagnostic features for the identification of postlarval Penaeus found in the shore waters of the Philippines are described and categorized based on specimens caught from the wild and those hatched and reared in the ... -
Studies on the habitat and food of juvenile milkfish in the wild
(Fisheries Research Society of the Philippines, 1981)Juvenile milkfish (Chanos chanos ) were collected from several different wild environments in Panay Island and neighboring islands. The fish were measured and the food ingested examined. Conditions of milkfish habitats ...
