Wednesday , 15 July 2020

Use of recirculation system for tilapia hatchery

By Development Communication Section

Dr. Platon discusses his experience in tilapia hatchery as this year’s speaker for the DKV Memorial Lecture

Former SEAFDEC/AQD Chief, *Dr. Rolando Platon, returned to SEAFDEC/AQD as the 25th Dean Domiciano K. Villaluz (DKV) Memorial Lecture speaker as he shared his experience in tilapia hatchery operation using a recirculation system.

Dr. Platon presented his techniques in producing sex-reversed tilapia fingerlings in tanks using a recirculation system. This system operates by pumping water from spawning and rearing modules to dedicated tanks for biofiltration and sedimentation to maintain water quality.

The design used one module of four tanks for spawning and two modules of four tanks each for fry rearing. Each module has two biofilters and two sedimentation tanks. The water movement (see diagram) throughout the whole circulation system is entirely powered by airlift pumps.

A diagram of the water flow system in one module of Dr. Platon’s tilapia hatchery which uses a recirculation system


The cost and returns analysis of the technique showed a profit margin of 55% at the end of one year production. This figure was attained given an assumption of 70% survival from swim-up to fingerlings (size 22) and selling price of Php 1 per fingerling.

The hatchery, located in Kidapawan City, now supplies seed to fish farms surrounding the municipalities in southern Mindanao. However, according to Dr. Platon, the inland freshwater aquaculture in the area still needs intervention to further develop. Dr. Platon further mentioned the need of assistance in resource assessment, regulations, and technology transfer mechanisms (e.g. information dissemination, seminars, demo farms and extension services).

The event was held last July 7, 2017 at SEAFDEC/AQD’s Multi-Purpose Hall in Tigbauan, Iloilo, Philippines.

*Dr. Platon joined SEAFDEC/AQD in 1975 as Researcher and eventually became Chief in 1996 until 2006. During his time as Chief, he institutionalized a new thrust through a reorganization of AQD, creating a separate division named Technology Verification and Commercialization Division (TVCD) – now Technology Verification and Demonstration Division (TVDD).
Dr. Platon (2nd from right) receives a plaque of appreciation from Acting Chief Dr. Chihaya Nakayasu (left); Mr. Antonio Villaluz, son of the late Dr. DK Villaluz (2nd from left); and SEAFDEC Deputy Secretary General Dr. Kaoru Ishii (right)

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