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

New Anoptichthys Cave Population (Characidae, Pisces)

Published: 
January 1, 1972
U.S. Agency for International DevelopmentU.S. Department of the Interior
This report explores a new anoptichthys cave population as a result of a second hybridization between a true cave fish and the epigean ancestral form.Read more
Regional focus: 
Mexico

Aquaculture Developments in Peru

Published: 
January 1, 1972
U.S. Agency for International Development
For an indefinite period beginning April 1, 1972, the inhabitants of the greater Lima area were unable to purchase red meat for the first 15 days of each month. In other cities in rural areas of Peru, people were unable to obtain beef two days each week. To compensate for the lack of beef, the...Read more
Regional focus: 
PeruLatin America and the Caribbean

Estimation of Irrigation Requirement for Venezuela

Published: 
January 1, 1972
U.S. Agency for International Development
Christiansen's formula was used to compute evaporation and potential evapotranspiration using 1013 months of data from 19 stations in Venezuela. Thirteen probability levels of precipitation were determined for each station. Potential irrigation requirements for 16 stations were computed based...Read more
Regional focus: 
Latin America and the Caribbean

Comparison of Organoleptic Quality of Largemouth Bass-Fed Natural and Artificial Diets

Published: 
January 1, 1972
U.S. Agency for International Development
HATCHERY-REARED LARGEMOUTH BASS FED EITHER OREGON MOIST PELLET (OMP) OR NATURAL FOOD ORGANISMS WERE COMPARED FOR THEIR ORGANOLEPTIC QUALITY. FISH WERE HELD A MINIMUM OF 24 HOURS PRIOR TO SLAUGHTER AND WERE DRESSED BY REMOVING THE HEAD, SKIN, AND VISCERA. THEY THEN WERE WASHED AND FROZEN. FILLETS...Read more

Irrigation Requirements in Latin American Countries

Published: 
January 1, 1972
U.S. Agency for International Development
A study on irrigation requirements in Latin American Countries. With increasing needs for the developments of their natural resources, many Latin American countries are placing increased emphasis upon irrigation and the evaluation of the availability of moisture requirements for agricultural...Read more
Regional focus: 
Latin America and the Caribbean

Irrigation Requirements for Turf

Published: 
January 1, 1972
U.S. Agency for International Development
There is much over irrigation of turf. Some is unavoidable but significant savings of water can be had from a better understanding of the principles of scheduling irrigation. Irrigation scheduling is greatly facilitated by uniformity of soil depth and moisture storage capacity. This paper describes...Read more

Protein Requirements of Cage - Cultured Channel Catfish

Published: 
January 1, 1972
U.S. Agency for International Development
Twenty suspended 1-mE3 cages were each stocked with 300 five- to six-inch channel catfish fingerlings to allow for the evaluation of five feeding regimens, each replicated four times. The experiment began April 15 and terminated October 21, providing for a 180-day feeding period. The daily feeding...Read more

Socio-Economic Aspects of Fishery Operation in the Nam Pong Reservoir, 1970-1971

Published: 
January 1, 1972
U.S. Agency for International Development
THE CREATION OF A MAN-MADE LAKE LED TO THE NATURAL DEVELOPMENT OF AN INLAND FISHERY AND SOCIOECONOMIC CHANGES AMONG THE FISHERMAN INVOLVED. THE ANALYSIS OF THESE CHANGES OF RESERVOIR MANAGEMENT ENCOMPASSES THE QUESTION OF OPTIMUM RATIO OF THE NUMBER OF FISHERMEN PER GIVEN AREA OF WATER SURFACE. THE...Read more

Fish That Mean Life

Published: 
January 1, 1972
U.S. Agency for International Development
This publication discusses the importance of fish and aquaculture in addressing food scarcity challenges.Read more
Regional focus: 
Global

Aeromonas - Induced Deaths Among Fish and Reptiles in an Eutrophic Inland Lake

Published: 
January 1, 1972
U.S. Agency for International Development
Aeromonas hydrophila, and Aeromonas shigelloides were associated with mortality among fish, turtles, and alligators of Lake Apopka, Lake and Orange Counties, Florida. Factors predisposing to infection included eutrophication of the lake and low dissolved oxygen content of the water.Read more

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