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

Relationship Between Rate of Feeding, Rate of Growth, and Rate of Conversion in Feeding Trials With 2 Species of Tilapia: T.Mossambica Peters and T.Nilotica Linneaus

Published: 
January 1, 1968
U.S. Agency for International Development
An experiment was conducted to determine the relationship between feeding rate, growth rate and conversion in two species of tilapia.Read more

Testing Plant Materials for Detection of Oxygen - Deficient Water in Ponds

Published: 
January 1, 1968
U.S. Agency for International Development
This report provides an easy method of determining the extent of oxygen deficiency in ponds, using the staining qualities of plant materials.Read more

Evaluation of Eight Species of Fish for Aquatic Weed Control

Published: 
January 1, 1968
U.S. Agency for International Development
A study to determine the value of herbivorous fishes in biological control of aquatic weeds.Read more

Control of Snails By the Redear (Shellcracker) Sunfish

Published: 
January 1, 1968
U.S. Agency for International Development
This study analyzes the biological control of two species of native pond snails using the redear sunfish. The feeding habits of redears were studied under varied conditions in aquaria. Snails alone were fed to the redears at rates up to 8 percent of their body weight for seven days and with few...Read more

Feeds and Feeding of Warm - Water Fish in North America

Published: 
January 1, 1968
U.S. Agency for International Development
Research on the nutrition of warm-water fish in North America is still in its infancy. The first controlled experiments were not conducted until the early 1950's. Almost all of the research work on the nutrition of warm-water fish has been concerned with the channel catfish. This review also...Read more

Philippines - U.S. Workshop on Fisheries and Oceanography, 4-9 Dec. 1967, Manila

Published: 
December 1, 1967
U.S. Agency for International Development
Summary of a Philippines workshop on fisheries and oceanography which had its principal aim as accelerated production of food from the sea. Fish is second only to rice as a food source and is of great nutritional significance. Attention was called to the government's rice policy as a model and...Read more
Regional focus: 
PhilippinesEast Asia and Pacific

Report: Fish Production, Processing and Marketing

Published: 
May 1, 1967
U.S. Agency for International Development
In the drought polygon of Northern Brazil, even in non drought years, the shortage of rainfall from June to December causes frequent crop failures and in general tends to cause a shortage of feed for cattle, hogs, poultry and other animals. As a result of the dam and reservoir building program of...Read more
Regional focus: 
BrazilLatin America and the Caribbean

Fish Kills Caused By Phytoplankton Blooms and Their Prevention

Published: 
May 25, 1966
U.S. Agency for International Development
Different types of plankton blooms form dense concentrations or scums on surface water have been the primary cause of fish kills in ponds. This document provides a summary of this type of problem in Alabama.Read more
Regional focus: 
United StatesNorth America

The 6Th Near East-South Asia Regional Irrigation Practices Seminar: Jordan 1966

Published: 
January 1, 1966
U.S. Agency for International Development
Report includes the proceedings of the Sixth Near East-South Asia Irrigation Practices Seminar. Delegates from fifteen nations dedicated their efforts in the seminar towards the task of finding solutions to the many problems concerned with irrigation practice, realizing that legal practices,...Read more
Regional focus: 
Middle East and North Africa

Vitamins Essential for Growth of Channel Catfish

Published: 
January 1, 1966
U.S. Agency for International Development
Symptoms were identified in channel catfish fed diets deficient in the water-soluble vitamins pyridoxine, pantothenic acid, riboflavin, thiamine, folic acid, nicotinic acid, B-12, or choline.Read more

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