Productivity and Efficiency

According to the U.S. Environmental Protection Agency, water efficiency is the smart use of our water resources through water-saving technologies and simple steps. Using water efficiently will help ensure reliable water supplies today and for future generations. Topics addressed in this theme provide insights, lessons, and guidance on how diverse stakeholders are working to improve water management and reduce water use.

Productivity and Efficiency Resources

Pond Dynamics/Aquaculture Collaborative Research Data Reports -- Volume Six, Number Three, Honduras Project: Cycle III of the CRSP Global Experiment

Publication date:
December 21, 1989
U.S. Agency for International Development
The Pond Dynamics/Aquaculture CRSP has been studying the dynamics of tilapia production ponds in the tropics subjected to differing nutrient additions since the initiation of field experiments in January 1984. A low level of phosphorus, as triple-superphosphate, was added to ponds during the rainy...Read more
Regional/Country focus:
Honduras
Latin America and the Caribbean

Hatchery Techniques for Egg and Fry Production of Clarias Batrachus (Linnaeus)

Publication date:
December 1, 1989
U.S. Agency for International Development
Egg hatching, and fry growth and survival of the walking catfish, Clarias batrachus (Linnaeus),were investigated under hatchery conditions in West Java, Indonesia. Spawning was environmentally induced in a specialized breeding pond. Gravid females utilized nests containing kakaban, a fibrous...Read more
Regional/Country focus:
Indonesia
East Asia and Pacific

Age Determination and Growth for Two Corvinas, Cynoscion Stolzmanni and Cynoscion Squamipinnis in the Gulf of Nicoya

Publication date:
September 1, 1989
U.S. Agency for International Development
Age determination and growth for two corvinas, coliamarilla (Cynoscion stoltzmanni) and aguada (Cynoscion quamipinnis), was studied. Validation of age determination on otoliths was carried out by the analysis of length-frequency analysis using the method of Macdonald and Pitcher (1979) and the...Read more
Regional/Country focus:
Costa Rica
Latin America and the Caribbean

Hydroacoustic Assessment of Fish Stocks in the Gulf of Nicoya, Costa Rica

Publication date:
September 1, 1989
U.S. Agency for International Development
The Gulf of Nicoya, Costa Rica is a relatively shallow, tidally influenced estuary that supports a substantial artisanal fishery on various stocks, primarily corvinas. However, little is known about the population size or productivity of these stocks. While hydro acoustic techniques have been...Read more
Regional/Country focus:
Costa Rica
Latin America and the Caribbean

Special Report: University of South Carolina, Scampi [South Carolina Aquaculture and Marine Internationals] -- January 30 - September 30, 1989: 1988/89 El Salvador Caps Program

Publication date:
September 1, 1989
U.S. Agency for International Development
Objectives of Ihe program included improvement of the trainees' listening proficiency to a level at whichthey could understand simple conversations and short lectures on topics in areas of interest (includingaquaculture). This improvement was measured at the end of the training period by the...Read more
Regional/Country focus:
El Salvador
Latin America and the Caribbean

Irrigation Management in Relation to Waterlogging and Salinity

Publication date:
September 1, 1989
U.S. Agency for International Development
This paper presents an overview of the current state of knowledge on the relationship between irrigation management in Pakistan and the incidence of waterlogging and salinity. It is emphasized that management research should focus on the whole system, including surface and ground water resources...Read more
Regional/Country focus:
Pakistan
South East Asia

Medium Scale Irrigation Systems in Northeast Thailand: Future Directions

Publication date:
September 1, 1989
U.S. Agency for International Development
Appropriate sites for new irrigation development are increasingly hard to find, and many countries are choosing to rehabilitate existing systems instead. This study assesses the effectiveness and replicability of the Northeast Small Scale Irrigation Project (NESSI), which involved rehabilitation...Read more
Regional/Country focus:
Thailand
East Asia and Pacific

Catch - At - Length Analysis That Incorporates a Stochastic Model of Growth

Publication date:
September 1, 1989
U.S. Agency for International Development
A length-structured population model, which incorporates von Bertalanffy growth, is used to describe changes in population abundance over time. The model is incorporated into a catch-at-length algorithm that uses a nonlinear least squares approach to estimate relative abundance, fishing mortality...Read more

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