8: Pen Culture

Pen Culture

practiced in the different bodies of water which are shallow, part of the natural body of water is enclosed by nets or fence like wall resting on the bottom

freshwater

practiced mostly in laguna de bay taal. lake

brackishwater

brgy dulao, asingan, pangasinan

nursery
main enclosure
barrier

major components of fish pens in lakes

nursery

constructed inside the main enclosure, 10% of the grow-out area

30-60 days

fingerlings are nursed ___ days at the nursery

main enclusore

area where the fish are cultured to marketable size

4 months

fish will stay in the grow-out area for about ___ depending on the required fish size

barriers

set to protect the nursery and grow-out enclosure from floating debris and forces of nature

1968

year of experimental venture of BFAR in laguna de bay (milkfish)

1970

year LLDA introduced a 40-ha pilot commercial scale fish pen project (milkfish)

1973

year when it was expanded into 993 pens extending over 5000 ha (milkfish)

1 to 100 ha ; 10 to 50 ha

pen sizees may vary from _____, majority ____ (milkfisj)

bamboo poles

fish pens are made using locally abundant ____ (milkfish)

1.5 m

average depth of water in pens (milkfish)

4000 kg/ha

average yield without supplementary feeding (milkfish)

traditional design

design that prevailed for more than three years, which is designed to resist typhoons

new design

does not resist the strong wind and wave forces generated by typhoons, it adjusts or plays along with such forces

0.8 - 1.0 m ; 25 - 30 ppt

In mudcrab pen culture, the water depth at high tide is between ____ with salinity ____

0.2 - 1.0 ha

In mudcrab pen culture, the pen enclosure have regular or irregular shape, may have ___ area during high tide

2.5 m - 3.0 m

in design of nursery pen in lake, vertical poles are driven in the lake bottom down to a depth of ___

1.0 m

lower horizontal brace is connected to every vertical pole at elevation of ____

2.5 m

upper horizontal brace is installed at elevation of ____

5.0 kg ; 1.0 m

the lower edge of the net is tied to a ___ sinker spaced at ___ on center

2.5-3.0 m

Design of the Main Enclosure in Lake, bamboo poles are driven into bottom at a depth of ___

1.0 m

Design of the Main Enclosure in Lake,bamboo poles are spaced ____ in center

3.0 m

Design of the Main Enclosure in Lake, anahaw trunks are driven in the inner side of the framework to a depth of about ___

3.0 m

Design of the Main Enclosure in Lake, anahaw trunk act as main post and are spaced ___ on center

2:1

Design of the Main Enclosure in Lake, bamboo batter posts inclination ___

6 mm

Design of the Main Enclosure in Lake, diameter of polyethylene ropes