Apahap production in floating net cages



Apahap production in floating net cages

Efforts  to raise the seabass or apahap are starting to bear fruit,

A study by Nestor D. Demenden, senior agriculturist of DA-Region 1, concentrated on culturing apahap.

The trial as conducted in Sto. Tomas,  La Union. Water depth ranged from 1.5 to 2.5 meters during low and high tides, respectively.

Temperature and salinity ranged from 24.2 to 34.8 degrees centigrade and 32 to 36 percent respectively.

Bamboo was used to construct the platform where the net cages were suspended. Three bamboos (bayog) were arranged to form the raft-like structures needed to complete the platform. Four bamboo poles were arranged parallel with each other at two meters distances. They were fixed perpendicularly above it, forming six square holes for the net cages. Styrofoam floaters were fixed on the corners and inner joining of the platform. Anchors prevented it from drifting.

The net cages are square net walls (inverted mosquito netlike0 measuring 1.5 meters x 1.5 meters x 1.5 meters. A fine meashed net  9B net) was used for the juvenile cages where the fish was raised from two months.

The seabass were later transferred to the production cages, which was made of polyethylene net measuring 400/12 x k 12.

The fish were fed with cropped trash fish at 10 percent of biomass for the first two months. This was gradually reduced o seven percent on the third and fourth months, and five percent on the fifth month onwards. Feed was broadcast to the fish in the morning and afternoon daily.

Results showed that from an initial weight of 20.5 to 21.56 grams, the fish reached 282.3 to 302.4 grams in 180 days – or had a production of 10.73 kilograms per cubic meter mean net bodyweight gain. The project had an ROI of 67 percent from a food conversion ratio (FCR) of 6.93. The survival rate  of the fish was 70 percent.

The trial also indicates that municipal waters can be used as both fishing ground and aquaculture area. – Wilhelmina Puyaban  (Mariano Marcos State University)

Soruce: Greenfields, 1993

Bamboo growing

Bamboo Growing

If you’re convinced of the potentials of bamboo growing, the  following procedure should help you get started. Let us assume that you have a one-hectare lot. It can be less but the important thing is to be close to sources of water, the soil should be sandy loam and well drained. Stake the area at a spacing of 8 meters by 8 meters. Remove weeds and other vegetation that may compete with the bamboo.


The next  step is to prepare planting stocks for direct out-planting. They can be obtained from the butt to the middle portion of one-to-two-year old culms. These culms should have undisturbed, fresh buds. Branches can also be used as planting stocks, although they should be treated with Hormex to induce rooting.


If you decide to use branches as planting stock, these must first be planted in 6 inches by 8 inches plastic bags containing topsoil. The branches  should stay in a plant nursery for about 6 to 10 months with only 50 percent sunlight. Watering should be done daily.


Should you use two node cuttings, collect them one day before outplanting, preferably in the afternoon. Use a hand-saw for cutting and keep them under cover with moist cloth. About 156 planting stocks will be enough for a one hectare area.


Continue reading “Bamboo growing”