Some information on the economics of pen or enclosure culture in developing countries, Collins and Eelmondo (1979) and Guerre'o and Soesanto (1982). While the milkfish culture in pen is covered better, the channel catfish (Ictalurus punctatus) culture, considered in Collins and Delmondo (1979), is not based on complete information. However, the economics of both milkfish culture (in Philipines) and catfish culture (in U.S.A.), as given by the latter authors, is presented hereunder:
More information on economics of pen culture of milkfish is given in Guerroro and Soesanto (1982). These tables are given here to give generalised information and also to compare cost of difference culture systems. It is needless to state there will be differences on the relative effects in different geographical and social situations.
There is not much information on the pen/enclosure culture in Africa. The trials in Cote d'Ivoire and other West African countries are of preliminary nature eventhough there is sufficient evidence that pen culture in Cote d'Ivoire as explained by Hem could be quite economical.
The account on Acadja culture very emphatically prove that it can be most economical as inputs are costwise small, but the question of enveronmental impact is significant.
Pen culture in temperate regions and developed countries on salmonids and other fishes are increasingly becoming lucrative. In this case most of the ventures are owing to inputs of private capital. As evident from the reports in aquaculture news letters (see concluding remarks) investments in pen culture are on the increase, but this aspect will not be discussed further herein.
