This was the recommendation of Dr. Veronica Grande and Prof. Marjorie Ramos, researchers of the Mariano Marcos State University (MMSU) College of Aquatic Sciences and Applied Technology (CASAT) in this town to tilapia farmers who may want to produce more fingerlings for commercial purposes.
Known as aquashade technology, this simple method was developed by Grande and Ramos to help increase the supply of fingerlings and meet the increasing demands of the tilapia industry.
The researchers said that the shading technology is effective in the summer season when the temperature of the pond is above 32 degrees Celsius. If raisers can lower the water temperature to at least 28 to 30 degrees Celsius, they could produce more spawns, up to 77.3 percent more than those being raised in nonshaded breeding ponds.
Meanwhile, hatchery-bred tilapia fingerlings are the main source of good quality stocks for public and private fish raisers who have large-scale aquaculture businesses in the country. However, one of their problems is the high temperature of water ponds during summer that leads to low spawn production.
Research done by MMSU CASAT experts show that tilapia cannot produce the desired volume of spawns if their environment exceeds 28 to 30 degrees Celsius. In some instances, waters in inland ponds cannot attain this stable temperature because of the inclement weather conditions brought about by the adverse effects of climate change. This usually happens at the start of the dry season, which is from November to May, a mating season for most freshwater fishes such as tilapia.
This story is from the April 2018 edition of Agriculture.
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This story is from the April 2018 edition of Agriculture.
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