This paper describes trials at combining Artemia rearing with salt production during the dry season, in newly-constructed earthen salt ponds (reservoir, evaporation, concentration, and crystallization ponds, total area of 5,000 m² at the Leganes, Iloilo Station of the SEAFDEC Aquaculture Department. Salt production by the solar method amounted to 250 sacks of slat over 30 days or an average of 8 sacks/day (1 sack = 50 kg). Two successful Artemia inoculations were undertaken in May and June 1979 respectively : in both cases the adult stage was reached after 1 week. The May population died off when the salinity was suddenly increased by salt addition. The June population gradually disappeared at the onset of the rainy season.

A pathogenic suctorean, identified as Ephelota gemmipara was observed in P. monodon larvae spawned and reared in tanks. Commonly found to inhabit hydroid colonies, E. gemmipara has a stalked body with two types of tentacles, the sucking and piercing types, and was observed to reproduce by multiple exogenous budding.

T. mossambica were grown to marketable size in floating cages in Laguna de Bay at a stocking density of 75/m². Those given supplemental feed 1 (rice bran:ipil-ipil:fish meal, 60:20:20) showed significantly faster growth than those fed with supplemental feed 2 (chopped snails:rice bran, 30:70). Controls, without supplemental feeding, showed slower growth rates as compared to the supplement-fed lots. A more efficient feed conversion ratio was obtained for feed 1 (4:1) as compared to feed 2 (6:1). Laboratory experiments in aquaria showed the feasibility of improving the growth of tilapia with ipil-ipil (Leucaena leucocephala) leaf meal alone. Varying levels of ipil-ipil, given at 3, 6, and 9% of the body weight, increased the body weight to 0.75 g, 1.68 g, and 2.94 g, respectively. Moreover, the crude protein content of tilapia increased proportionately with increasing levels of ipil-ipil leaf meal. The significance of the above results in the light of establishing a tilapia lake farming industry and its effect on the improved nutrition of the people were discussed.

In the Philippines, the total mangrove site for aquaculture development and others is about 576,000 hectares which constitute only 1.9 percent of the country's land resources. There are at present about 176,000 hectares of fishponds, representing 30.5 percent of the total mangrove resources in the country. Located in the northern part of Panay Island, 11°40' latitude and 122°30' longitude, Batan Bay has approximately 2,500 hectares with the average water depth of less than 5 meters during low tide. This bay consists of Port Batan, Banga Baylet and numerous tidal creeks. More than 80 percent of the coastal line in the bay is surrounded by mangrove areas and the rest is rocky or coconut forest. Shrimp fishing is considered an important fishery in Batan Bay. The main objectives of this survey are: 1) To know the species, particularly edible ones, of decapod crustaceae found in the mangrove and estuarine areas; 2) To know their ecology and life history; and 3) To provide the biological data available for protection or preservation of the mangrove area.

Approximately a decade ago the culture of sugpo or tiger prawn (Penaeus monodon) was in its infancy. Prawns were stock alone together with milkfish and fed mainly on natural food present in ponds. High market prices, increase consumer demand, and availability of seeds through artificial propagationin the last six years have brought about a shift towards more intesive culture of prawns. With the advent of the monoculture and more intensive farming of sugpo has come a greater demand for an external source of food because natural food organism in the ponds would no longer suffice to meet the dietary requirements of the prawns. The intensive culture of prawns requires knoledge of their nutrient requirements in order to provide adecquate food for growth and survival. Knowledge of their feeding habits is important particilarly in feed developmemt. Prawn culturists and nutritionists are faced not only with problems of nutritional requirements but also practical consideration such as physical feature of the diet, methods and frequency of feeding, feeding behavior and feeding preferences at varios stage of the life cycle,effects of the food on water quality, amount of feed and types of facilities appropriate for culture.

The manual describes the procedures and techniques to follow for short and long duration transport of prawn fry. Regulations for acceptance and handling of wet shipment and the acclimation of the fry are also covered.