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Chicken manure, rice hulls, and sugar-mill wastes as potential organic fertilizers in shrimp (Penaeus monodon Fabricius) ponds
(Elsevier, 1992)
Shrimp (Penaeus monodon Fabricius) were cultured (3000 juveniles/ha) in 50-m<sup>2</sup> earthen ponds fertilized with composted agricultural and industrial wastes at a basal application rate of 2 ton/ha. The following ...
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 ...
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, ...
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 ...
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, ...
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 ...
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 ...
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 ...
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 ...
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 ...