การท่องเว็บ Quarterly Research Reports ตามวันที่ออก
Now showing items 1-20 of 125
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Notes on the induced maturation and spawning in four-month-old Penaeus monodon Fabricius by eyestalk ablation
Primavera, Jurgenne
; (Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)
The ablation technique consisted of making an incision across the eyeball to allow free flow of fluids while holding the prawn under water, squeezing the eyeball contents outwards, and pinching hard the eyestalk tissue. ... -
Bioenergetics of the freshwater prosobranch Idiopoma angularis Muller in Laguna de Bay
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)This study was made as an attempt to investigate some of the ecological aspects of the freshwater snail Idiopoma angularis Muller in a modern framework of energy flow and mathematical models. It offers the first investigation ... -
Effect of temperature on the oxygen consumption of Penaeus monodon postlarvae
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Extended abstract only. -
Use of fermented kitchen waste in rearing Penaeus monodon larvae
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Fermented vegetable and kitchen wastes are available as feeds for not only zoea but also mysis and up to certain points in the postlarval stages of sugpo, Penaeus monodon. It is recommended that the hatchery use fermented ... -
Tolerance of Penaeus monodon larvae to cupric sulfate added in bath
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Copper is used to deter the growth of bacterial, fungal and protozoan disease organism in fishes. Zoeae (Z1), myses (M1) and postlarvae (P1) were exposed to copper sulfate at concentrations ... -
Preliminary chemical and physical evaluation of some formulated feeds for P. monodon
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)The culture of Penaeus monodon has explicitly defined the need for diet formulations or supplementary feeds that would promote optimum growth and survival of the animal. A total of 28 feed combinations were developed for ... -
Preliminary biological evaluation of some formulated feeds for P. monodon
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Rice bran is widely used by fish farmers as supplementary feed while soybean cake is used both as feed and as fertilizer in fishponds. Both fish meal and shrimp head have been found acceptable as feed ingredients. However, ... -
The effect of various protein levels on the growth and survival rates of Penaeus monodon Fabricius
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Postlarvae of tiger prawns, P. monodon , were fed with various protein levels of 0; 30; 40 and 50%, fish meal and rice bran were combined and pelletized for 16 wks. Prawns used had an average mean length of 1.2 mm and an ... -
Amino acid analysis of P. monodon muscle
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Figures for the amino acid composition of Penaeus monodon, are tabulated, and compared to those for white tuna meat. -
Survival rates of different postlarval stages of Penaeus monodon Fabricius
Primavera, Jurgenne (Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)
The objective of this study is to determine survival rates of different postlarval stages upon stocking in the Leganes ponds. Twelve 3m x 2m x 2m suspension nets made of nylon cloth (mesh size = 0.1 mm) were set up in a ... -
Land-based mass production of prawn (Penaeus monodon Fabricius) spawners
Primavera, Jurgenne (Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)
The first spawnings were obtained 12 days after ablation with 4 spawners yielding 784,000 eggs and a harvest of 250,000 P10 fry. Survival of females after 1 month was approximately 30%. Mortalities were mostly ... -
Effect of some physico-chemical factors on the survival and growth of Penaeus monodon postlarvae
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Growth and survival rates of P. monodon postlarvae were examined at different temperatures, salinities, and nitrite and ammonia concentrations, using one feed level. Condition of postlarvae greatly affected the experimental ... -
Effect of different light intensities on the growth of the diatom Chaetoceros calcitrans
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Batch cultures of C. calcitrans were maintained indoors at a temperature range of 21 to 25 C and continuously illuminated by 40-watt daylight fluorescent lights. Cultures were exposed to 5 different intensities from 200 ... -
Effect of nitrite, ammonia, and temperature on P. monodon larvae
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)P. monodon larvae were studied for the effects of temperature, ammonia, and nitrite on survival. Toxicity levels of nitrite were found to vary with larval stage. Larvae could tolerate ammonia up to about 10 ppm, with the ... -
Identification and culture of common diatoms as possible feed for Penaeus monodon
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Diatoms were collected from Buyuan Bay, and from the hatchery tanks at Tigbauan, to determine the commonly occurring species, the feasibility of culturing these species, and the potential of these selected species as food ... -
Laboratory breeding of the mud crab Scylla serrata (Forskal) through the zoea and megalopa stages to the crab stage
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)A series of experiments is being conducted to establish breeding techniques to mass-produce seedlings of S. serrata for pond cultivation to meet the commercial demand for the crab. The objective is to culture the crab ... -
Effect of furanace on the development of larval stages of Penaeus monodon Fabricius
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Zoea 2 (Z2), Mysis 1 (M1) and Postlarva 1 (P1) of P. monodon artificially spawned in closed-system concrete hatchery tanks were bioassayed for their tolerance to the antibiotic furanace. ... -
A suctorean parasite of Penaeus monodon larvae
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)A new disease caused by a suctorean has been observed in tank-spawned and reared P. monodon larvae. Identification of the etiologic agent pointed to Ephelota gemmipara R. Hertwig, a species commonly found to inhabit hydroid ... -
Notes on ovarian rematuration of ablated sugpo (prawn) Penaeus monodon Fabricius
Primavera, Jurgenne; (Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)
To what extent spent P. monodon females can remature and spawn successive broods is an important question in terms of recycling spawners in a commercially viable operation. Corollary to this is the quantity and quality of ... -
Isolation and culture in artificial media of Lagenidium from Penaeus monodon larvae
(Aquaculture Department, Southeast Asian Fisheries Development Center, 1977)Fungal infection of P. monodon larvae is a problem in hatchery operations. The fungus, which attacks the nauplius to postlarval stages and causes up to 100% mortality, has been tentatively identified as belonging to the ...
