Proceedings of the second International Milkfish Aquaculture Conference, 4-8 October 1983, Iloilo City, Philippines http://hdl.handle.net/10862/154 2026-04-06T12:50:11Z 2026-04-06T12:50:11Z Singh, Virendra P. Poernomo, Alie T. http://hdl.handle.net/10862/171 2020-06-10T08:05:00Z 1984-01-01T00:00:00Z

Acid sulfate soils and their management for brackishwater fishponds Singh, Virendra P.; Poernomo, Alie T. Juario, Jesus V.; Ferraris, R. P.; Benitez, L. V. The major problems of fishponds build on acid sulfate soils are low pH; ionic imbalance and toxic levels of aluminum, iron, and sulfate; deficiency of phosphorus and poor response to fertilizer application; slow and poor growth of fish food organisms and fish; erosion of dikes; and in some cases fish kills. For economic operations and to remedy the problems of poor algal growth, fish kills and low yields, the acid in the pond bottom and dikes has to be neutralized or removed. A repeated sequence of drying, tilling, and flushing with seawater is a cheap, fast, and effective reclamation method that can be done in one dry season. Following this method, the dry soil pH improved; exchangeable aluminum, pyritic iron, active iron, active manganese, and sulfate decreased; and available phorphorus improved. The values for alkalinity, phosphate, aluminum, iron, and sulfate in the pond water improved greatly. Fish production was about three-fold more in reclaimed ponds (375-510 kg/ha) compared with the control ponds (50-173 kg/ha).

1984-01-01T00:00:00Z Lam, T. J. http://hdl.handle.net/10862/164 2022-01-22T01:27:04Z 1984-01-01T00:00:00Z

Artificial propagation of milkfish: Present status and problems Lam, T. J. Juario, Jesus V.; Ferraris, R. P.; Benitez, L. V. Milkfish (Chanos chanos ) has been extensively cultured in Indonesia, Taiwan, and the Philippines. At present, the only source of fry for fish farmers is the coastal waters during the spawning season. The supply of fry is therefore often irregular and inadequate. Since the early 1970s attempts have been made to breed milkfish in captivity, particularly in Hawaii, Taiwan, and the Philippines. This paper reviews the progress problems and suggested future research direction of the following areas: induction of ovulation/spawning, sperm preservation, larval rearing, and induction of gonadal maturation.

1984-01-01T00:00:00Z Kawamura, Gunzo http://hdl.handle.net/10862/167 2022-01-22T01:26:16Z 1984-01-01T00:00:00Z

The sense organs and behaviors of milkfish fry in relation to collection techniques Kawamura, Gunzo Juario, Jesus V.; Ferraris, R. P.; Benitez, L. V. This paper describes the sense organs and some of the behavioral characteristics of milkfish (Chanos chanos ) fry, based on studies conducted at the Aquaculture Department, SEAFDEC, Philippines and at Kagoshima University, Japan in 1982. Based on the experimental results obtained and the observations made in the Philippines, Indonesia, and Taiwan, existing fry collection techniques such as the employment of fish lamps and scare lines are considered effective and rational. Several recommendations are made for improvements of the collection gear and for research on fry behavior.

1984-01-01T00:00:00Z Chong, Kee-Chai Poernomo, Alie T. Kasryno, Faisal http://hdl.handle.net/10862/162 2022-01-22T01:26:51Z 1984-01-01T00:00:00Z

Economic and technological aspects of the Indonesian milkfish industry Chong, Kee-Chai; Poernomo, Alie T.; Kasryno, Faisal Juario, Jesus V.; Ferraris, R. P.; Benitez, L. V. A broad overview is presented of the economic and technological aspects of Indonesian milkfish (Chanos chanos ) aquaculture covering information on the economic importance of milkfish, fry capture and distribution, milkfish grow-out system, economics of production, and milkfish marketing and distribution. In Indonesia, milkfish is regarded as a high value food item. Because of various constraints to high milkfish yield, Indonesian milkfish ponds are still grossly underutilized. As a consequence, these constraints and the resulting present low per hectare yield level would not be able to support the government s drive toward self-sufficiency in fish in the near future. Understanding socioeconomics of milkfish production such as the attitudes of producers toward present low yield and the reasons why they are not using more inputs is of importance. Government assistance should not be narrowly focused on production alone but should also encompass organized marketing and distribution involving as much as possible the private sector in moving the fish, and continuous follow-up monitor progress of government projects.

1984-01-01T00:00:00Z