AQD Journal Articles: Recent submissions
Now showing items 821-840 of 1249
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An ultrastructural study on the occurrence of aberrant spermatids in the testis of the river sculpin, Cottus hangiongensis
(The Ichthyological Society of Japan, 1992)The process of spermatogenesis and spermiogenesis in the river sculpin,Cottus hangiongensis, was observed ultrastructurally. During spermatogenesis, some germinal cysts in the seminal lobules were found to contain ... -
A comparison of the annual changes in testicular activity and serum androgen levels between the early and delayed maturing groups of male Cottus hangiongensis
(Springer Verlag, 1992)Annual changes in testicular activity and concentration of two serum androgens were monitored in two groups of the river-sculpin Cottus hangiongensis collected from the upper and lower reaches of a river at southern Hokkaido, ... -
Ovarian changes and female-specific protein levels during sexual maturation of the white shrimp Penaeus indicus
(Society of Israeli Aquaculture and Marine Biotechnology, 1992)The histological changes in the ovary and female-specific protein levels in the hemolymph during sexual maturation of Penaeus indicus were determined. Ovarian maturation was classified into four stages: immature stage, ... -
A practical method of extracting mimosine from ipil-ipil, Leucaena leucocephala, leaves and its effect on survival and growth of Penaeus monodon juveniles
(Society of Israeli Aquaculture and Marine Biotechnology, 1992)Soaking fresh ipil-ipil, Leucaena leucocephala, leaves in tap water (1:1, v/v; or 50 g in 500 ml) for 30-48 hours with a water change after 24 hours extract atleast 90% of its mimosine, a toxic lysine derivative. This ... -
Ozone treatment of slaughterhouse and laboratory wastewaters
(Elsevier, 1992)Ozonation as a method of treatment for highly polluted slaughterhouse wastewater and slightly polluted laboratory wastewater was investigated. The results showed that use of a low concentration ozone stream (0·11 g ... -
Hormonal changes accompanying sexual maturation in captive milkfish (Chanos chanos Forsskal)
(Springer Verlag, 1992)Steroid hormone profiles accompanying sexual maturation in captive milkfish are described. There were no significant differences in levels of serum estradiol 17-β (E2) and testosterone (T) between immature male ... -
New records of a marine macrobenthic algae of Panay and Guimaras Islands
(Science and Technology Information Institute, 1992)Thirty new records of macrobenthic algae for Panay and Guimaras Islands are reported, consisting of 12 species of Chlorophyceae, 4 Phaeophyceae and 14 Rhodophyceae. -
Agar yield and gel strength of Gracilaria heteroclada collected from Iloilo, Central Philippines
(Walter de Gruyter, 1992)Seasonality of yield and gel strength of agar from Gracilaria heteroclada was determined. Gel strength was high (510-794 gm cm-2) during early dry season (October-March) and low (43-101 gm cm-2) during ... -
Occurrence of Vibrio sp. infection in grouper, Epinephelus suillus
(Blackwell Publishing, 1992)Vibrio sp., was consistently isolated from grouper, Epinephelus suillus, with bacterial infection. Fingerlings, which were challenged with the bacterium by injection, were highly susceptible. Immersion challenge resulted ... -
Agar-digesting bacteria associated with ‘rotten thallus syndrome’ of Gracilaria sp.
(Elsevier, 1992)A condition of the tetrasporophyte stage Gracilaria spp., characterized by white to pinkish discoloration and gradual disintegration of the thallus, has been observed in tank-held stocks. Microscopic observation revealed ... -
Gracilaria (Rhodophyta) farming in Panay, Western Visayas, Philippines
(Elsevier, 1992)Interviews were conducted among eight Gracilaria growers in Panay, Western Visayas, Philippines from March to July (1990) using a structured questionnaire. The "rice planting" method was employed by farmers growing seaweeds ... -
Gathering of economically important seaweeds in Western Visayas, Philippines
(San Carlos Publications, 1992)A survey was conducted in 12 coastal municipalities of Western Visayas, Philippines from March to July 1990 to determine the seaweed gathering practices of fishermen. There were 83 gatherers involved in this small-scale ... -
Rheological properties of agar from Gracilariopsis heteroclada (Zhang et Xia) Zhang et Xia (Gracilariales, Rhodophyta) treated with powdered commercial lime and aqueous alkaline solution
(Walter de Gruyter, 1992)Rheological properties were measured for 1.5% agar gels from Gracilariopsis heteroclada pre-treated with powdered commercial lime (CaCO3) during sun drying, and a combination of two alkaline solutions during ... -
Influence of extraction time on the rheological properties of agar from some Gracilaria species from the Philippines
(Walter de Gruyter, 1992)The influence of extraction time on the clean anhydrous yield, rheological properties, dynamic gelling and melting temperatures of 1.5% agar from six species of Gracilaria and one species of Gracilariopsis collected from ... -
Cage culture of Kappaphycus alvarezii var. tambalang (Gigartinales, Rhodophyceae)
(Springer Verlag, 1992)Kappaphycus alvarezii var. tambalang was cultured in a 3 × 3 m bamboo raft installed inside a 4 × 4 m floating net cage of Lates calcarifer (sea bass) broodstock at SEAFDEC Sub-station Igang, Guimaras, Philippines, from ... -
Light color and ovarian maturation in unablated and ablated giant tiger prawn Penaeus monodon (Fabricius)
(Elsevier, 1992)The effect of light color (green, blue and white fluorescent lights, with natural light as a control) on maturation in intact and eyestalk-ablated Penaeus monodon was tested in 12-m3 broodstock tanks. Size and ... -
Effect of streamer tags on survival and growth of juvenile tiger prawns, Penaeus monodon, under laboratory conditions
(CSIRO Publishing, 1992)The effects of streamer tags and initial prawn size on survival and growth in 2-month- and 7-month-old pond-reared juveniles of Penaeus monodon Fabricius (11-30 mm carapace length, CL) were assessed under laboratory ... -
The effects of different stocking densities and some abiotic factors on cage culture of Gracilaria sp. (Rhodophyta, Gigartinales)
(Walter de Gruyter, 1992)Specific growth rates (% day-1) and production rates (g m-2 day-1) of Gracilaria sp. reared in net cages on a bamboo floating raft from March 1989 to February 1990 were determined at different ... -
Lunar synchronization of spawning in sea bass, Lates calcarifer (Bloch): Effect of luteinizing hormone-releasing hormone analogue (LHRHa) treatment
(Wiley-Blackwell, 1992)Based on egg collection records, spontaneous spawning activity of sea bass, Lates calcarifer (Bloch), reared in floating net cages followed a semilunar cycle. The peak of multiple spawnings coincided with declining spring ... -
Gonad development of Placuna placenta Linnaeus fed Isochrysis galbana Parke, Tetraselmis tetrahele (G.S. West) Butch, or their combination
(Elsevier, 1992)A study was conducted to determine a suitable algal diet for the window-pane oyster, Placuna placenta Linnaeus, during gonad development. Sexually immature P. placenta (70 mm shell height) were fed Isochrysis galbana Parke, ...
