Yap, Wilfredo G.

English

Southeast Asian Fisheries Development Center, Aquaculture Department Institutional Repository (SEAFDEC/AQD Institutional Repository )

252FARMING OF MUSSELS AND OYSTERS IN THE. PHILIPPINESW ilfre d o  G. YapSEAFDEC A q uacu ltu re  Department253FARMING OF MUSSELS AND OYSTERS IN THE PHILIPPINESW ilfre d o  G. YapA. C u ltu re  approach in  the  P h ilip p in e s1. Growing done in  s p a t f a l l  area2. No th in n in g3. S tru c tu re s  f ix e d  to  bottomC. M a te r ia ls  used1. P rim ary  -  bamboo2. Secondarya) m ussels: p o lyp ro p y le n e  ropesb) o y s te rs : m onofilam ent, o y s te r  s h e l ls ,  o ld  rubbe r t i r e sC. C u ltu re  techn iques1. B roadcast ( fo r  o y s te r  o n ly )2. Stake3. B i t i n  -  p re s e n tly  a p p lie d  to  o y s te r  o n ly  b u t b a s ic  p r in c ip le  a p p lic a b le  to  mussels4. T ray -  good f o r  grow ing loose  o y s te r  sp a ts , n o t a p p lic a b le  to  musselsD. Problems w ith  p re se n t method1. Crowding r e s u lts  in  uneven grow th and d is to r t io n s .2. S ince space is  the l im i t in g  fa c to r ,  in  mussels th e re  is  a la rg e r  number o f  spa ts  lo s t  s im p ly  due to  la c k  o f  space.3. S i l t a t io n  is  g r e a t ly  enhanced by the  number o f  bamboo po les  in  the  bo ttom . T h is  r e s u lts  in  env ironm enta l d e te r io ra t io n  f o r  mussels and o y s te r p ro d u c tio n .4. M a te r ia ls  used a re  v e ry  tem porary in  n a tu re  and have to  be re p la ce d  v e ry  o f te n .  A lte rn a t iv e  m a te r ia ls  a re  ve ry  expensive w ith  no in te rm e d ia te  a lte r n a t iv e s .254E. Research Results in SEAFDEC1. Coconut husks found to be very attractive spat collectors for mussels. Spat collection on polypropylene ropes enhanced greatly by insertion of coconut husks at regular intervals.2. A method of thinning and transplanting developed using strips of .  to bind mussel spats to growing ropes.3. Use of floating structures will be very convenient but rather expensive.4. Production of 5-10 kg mussels per meter polypropylene rope can be attained in 6-8 months.5. It seems possible to eventually evolve a larval monitoring program for oysters to find out time of laying down cultches to catch primarily C . iredalei.6. Post-harvest life of mussels can be extended by chilling.7. The brown mussel, the most widespread mussels in the Philippines, has very low aquaculture potential.8. The green mussel should be classified as Perna viridis rather than Mytilus smaragdinus.

Farming of mussels and oysters in the Philippines

https://repository.seafdec.org.ph/bitstream/10862/3504/1/YapWG1979.pdf

Farming of mussels and oysters in the Philippines

Abstract

Similar works

Full text

Available Versions

Southeast Asian Fisheries Development Center, Aquaculture Department Institutional Repository (SEAFDEC/AQD Institutional Repository )