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Now showing items 241-250 of 332
Growth rate of the Philippine abalone, Haliotis asinina fed an artificial diet and macroalgae
(Elsevier, 1996)
The growth rate of Haliotis asinina fed three diets was evaluated over a 120 day period. Juveniles fed the red alga Gracilariopsis heteroclada and an artificial diet grew faster in terms of both total body weight and shell ...
A survey of chemical and biological products used in intensive prawn farms in the Philippines
(Elsevier, 1993)
With attractive prawn export prices and the availability of hatchery fry and commercial feeds, Philippine aquaculture has experienced a shift from milkfish to prawn Penaeus monodon and an intensification from traditional ...
Dietary requirement of milkfish (Chanos chanos Forsskal) juveniles for total aromatic amino acids
(Elsevier, 1992)
The phenylalanine requirement of milkfish at two dietary tyrosine levels was determined using a 2× 6 factorial feeding experiment. The amino acid test diets (45% crude protein) contained vitamin-free casein and gelatin ...
Effect of detention time on aerobic waste stabilization pond performance in Southeast Asia
(Springer Verlag, 1994)
The rising level of pollution in rivers, lakes and other bodies of water has created problems of significant magnitude in Southeast Asia. Apart from the aesthetic desirability of clean rivers are the pressing dangers to ...
Improvised filter unit for agar extraction/filtration
(San Carlos Publications, University of San Carlos, 1993)
Agar is a high-priced phycocolloid usually extracted from red seaweeds (Rhodophyta). It has many uses in the food and pharmaceutical industry (Chapman 1970, Armisen and Galatas 1987). Worldwide production of agar has reached ...
Salinity tolerance of fertilized eggs and yolk-sac larvae of the rabbitfish Siganus guttatus (Bloch)
(Elsevier, 1993)
Among naturally spawned and hormonally induced eggs of Siganus guttatus, salinity levels, at which at least 90% of the eggs hatched, ranged from 7 to 67 ppt for naturally spawned eggs and from 9 to 67 ppt for hormonally ...
Ovarian development in relation to changes in the external genitalia in captive Penaeus monodon
(Elsevier, 1993)
Hatchery-reared Penaeus monodon postlarvae were cultured in ponds until they attained adult size. Thereafter, the shrimps were transferred to concrete broodstock tanks for maturation. During the culture period, the ...
Effects of dietary lipid source on reproductive performance and tissue lipid levels of Nile tilapia Oreochromis niloticus (Linnaeus) broodstock
(Blackwell Publishing, 1993)
Nile tilapia were fed diets supplemented with one of the following lipid sources at 5% level: cod liver oil, corn oil, soybean oil, a coconut oil-based cooking oil or a combination of cod liver oil and corn oil (1 : 1). ...
Profiles of progesterone- and estradiol-like substances in the hemolymph of female Pandalus kessleri during an annual reproductive cycle
(Elsevier, 1991)
The changes in GSI and HSI of Pandalus kessleri were monitored during an annual reproductive cycle. GSI reached a peak when ovaries were composed of yolky oocytes and decreased sharply during the spawning season. HSI ...
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 ...