Journal Articles, Conference Papers and Book Chapters by SEAFDEC Staff: Recent submissions
Now showing items 1061-1080 of 1722
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Spontaneous maturation and spawning of sea bass Lates calcarifer in floating net cages
(Blackwell Publishing, 1991)Male and female sea bass (Lates calcarifer Bloch) from 1982 wild-caught juveniles reared in floating net cages matured at about 2.0–2.5 years (mean body weight =1.1 kg; mean total length = 42.0 cm) and 3–4 years (2,7 kg; ... -
Cryopreservation of different strains of the euryhaline rotifer Brachionus plicatilis embryos
(Japanese Society of Fisheries Science, 1991)Cryopreserevation of different strains of Brachionus plicatilis symmetrical stage embryos was conducted. One S-type strain, namely Yashima-S (YS), and three L-type strains, namely Yashima-L (YL), Nagasaki (NG), and Hamana ... -
Suitability of different formalin-containing fixatives for the eggs of freshwater Asian catfish Clarias macrocephalus (Gunther)
(Society of Israeli Aquaculture and Marine Biotechnology, 1991)The suitability of different formalin-containing fixatives was tested for the eggs of the catfish (Clarias macrocephalus) by comparing the osmotic pressure of several fixatives with catfish plasma and measuring the size ... -
Effects of unilateral eyestalk ablation on growth and reproductive parameters in wild and pond-reared Penaeus monodon (Fabricius) broodstock
(San Carlos Publications, University of San Carlos, 1991)Effects of unilateral eyestalk ablation on wild and pond-reared Penaeus monodon during ovarian maturation were determined by examining the growth (e.g., carapace length, body length, body weight) and reproductive (e.g., ... -
Effects of unilateral eyestalk ablation on ovarian histology and oocyte size frequency of wild and pond-reared Penaeus monodon (Fabricius) broodstock
(Elsevier, 1991)Effects of eyestalk ablation on ovarian maturation of wild and pond-reared Penaeus monodon were determined to compare their reproductive potential. This was done by counting the oocyte size frequency in four regions of the ... -
Evaluation of different supplemental feeds for milkfish (Chanos chanos) reared in brackishwater ponds
(Elsevier, 1991)The effects of supplemental feeding on milkfish growth, production, survival, water quality, and economic benefits in brackishwater ponds were evaluated by comparing a rice bran diet, containing 11.3% protein, and two ... -
Effects of fiber in supplemental feeds on milkfish (Chanos chanos Forsskal) production in brackishwater ponds
(Asian Fisheries Society, 1991)The study explores the nutritive value of fiber in supplemental feeds for milkfish. The feeding rates were adjusted so that all treatments involved equal protein-N load (6 g·kg-1 fish/day), and varying ... -
Utilization of feed and rice straw compost for milkfish, Chanos chanos, production in brackishwater ponds
(Blackwell Publishing, 1991)The study was undertaken to determine the effect of 0, 25, 50 and 75% replacement of organic matter in the feed with rice straw compost on milkfish (Chanos chanos) growth and production. Treatments have similar organic ... -
Influence of stocking density and fertilization regime on growth, survival and gross production of Penaeus monodon Fabricius in brackishwater ponds
(Society of Israeli Aquaculture and Marine Biotechnology, 1991)Twelve 0.1 ha earthen ponds were stocked at 3,500 or 7,000/ha with 1-month old nursery reared Penaeus monodon Fabricius (1.73 g). Fertilizer treatments were 125 kg chicken manure plus 4.1 kg diammonium phosphate (18-46-0) ... -
Yield of Penaeus monodon Fabricius in brackishwater ponds given different fertilizer combinations
(Elsevier, 1991)Yields of Penaeus monodon Fabricius in brackishwater earthen ponds were determined using different fertilizer combinations in two sets of experiments. Results indicated that the use of fertilizers was vitally needed to ... -
Optimum dietary protein level for growth of bighead carp (Aristichthys nobilis) fry in a static water system
(Elsevier, 1991)Isocalric diets (290 kcal digestible energy/100 g) with protein levels ranging from 20 to 50% in increments of 5% were fed to bighead carp fry (3.8±0.2 mg mean body weight and 9.8±0.1 mm total length) for 7 weeks. Growth ... -
Growth and reproductive performance of bighead carp (Aristichthys nobilis) reared with or without feeding in floating cages
(Elsevier, 1991)Bighead carp (10.5 months old) stocked in cages in Laguna de Bay were assigned the following feeding treatments: 1. 40% protein diet, 2. 20% protein diet, and 3. no artificial diet (control), to determine the effects of ... -
Growth, survival and feed conversion of Nile tilapia fingerlings fed diets containing Bayo-n-ox, a commercial growth promoter
(Society of Israeli Aquaculture and Marine Biotechnology, 1991)A feeding experiment was conducted to determine the effect of a commercial growth promoter, Bayo-n-ox, on Nile tilapia fingerlings (mean initial weight 3.6 g). After 6 weeks, the weight gain of fish given 25 mg Bayo-n-ox/kg ... -
Turbidity and seawater intrusion in Laguna de Bay
(Springer Verlag, 1991)The ecological role of seawater intrusion in Laguna de Bay is assessed due to the operation of the Napindan Hydraulic Control Structure (NHCS). Turbidity is recognized as one limiting factor in the lake's biological ... -
Economic feasibility of polyculture of tiger shrimp (Penaeus monodon) with Nile tilapia (Oreochromis niloticus) in brackishwater ponds
(Asian Fisheries Society, 1991)The polyculture of tiger shrimp (Penaeus monodon) with milkfish (Chanos chanos) has been practiced in the Philippines, bit little is known about the possible polyculture of the shrimp with the tilapias in spite of increasing ... -
Analysis of nitrite in aqueous solutions containing concentrated matrix ions using an octadecyl-poly(vinyl alcohol) gel microbore column and an electrochemical detector
(Dr. Alfred Huethig Publishers, 1991)The importance of the analysis of low level nitrite concentrations in aqueous samples is increasing in various fields such as environmental, food, and aquaculture chemistry. Recent progress in ion chromatography paved the ... -
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 ... -
Notes on the completion of the life cycle of Penaeus japonicus in captivity in the Philippines
(Science and Technology Information Institute, 1991)Penaeus japonicus nauplii from wild spawners were reared up to the early postlarval stage (PL20) in 12-t concrete tanks. A survival rate of 13-15% was obtained. Hatchery-reared postlarvae were restocked in concrete tanks ... -
Hatchery rearing of sea bass Lates calcarifer Bloch
(Science and Technology Information Institute, 1991)A hatchery rearing scheme for sea bass (Lates calcarifer Bloch) is described. Survival rate from hatching (d0) to harvest (d30) was 34%. Feeding sea bass fry with Chlorella-fed or Selco-enriched instar II Artemia from d19 ... -
Size- and weight-dependent cannibalism in hatchery-bred sea bass (Lates calcarifer Bloch)
(Blackwell Publishing, 1991)The relationship of predator size to maximum prey size, and predator weight to weight of prey consumed among cannibalistic sea bass (Lates calcarifer Bloch) in a hatchery were assessed. Maximum prey size was computed from ...
