Pages

07 September, 2010

Freshwater Fish Egg Incubators III.

2)  MacDonald Jars- 

      
      This type of incubator was developed in the US and is commonly used in the Philippines to hatch the eggs of Tilapia. The original incubator is about 5 liter capacity in size and made up of Plexiglas. A modification of this incubator is manufactured in the Philippines using fiberglass.    It has a 2 cm tube at the center where water with slight pressure passes.  There is a small clearance between the bottom of the center tube and the concave bottom of the jar to produce a jet of water that lifts the eggs slightly.  This is to prevent the eggs from stacking.  Since the eggs are dense and their tendency is to settle, the developed fry swims with the water flow and escapes through the spout of the incubator to another tank.
  
      With egg collection and incubation, the hatchery operators claim that high egg and fry production are achieved with this method as compared to the fry collection technique where they claim only 30% recovery.  Harvesting the eggs from the brooding female Tilapia also shortens its re-maturation period.

      The original MacDonald jar incubator can also be used to hatch eggs of other fish species like bighead carps, Pangasius, Red tail sharks, tinfoil barb, Pacu and other fish producing demersal type eggs.  Its only disadvantage is its small volume capacity. For big spawners producing big volumes of eggs,  several of these small sized incubator will be necessary. 

5 comments:

Levine said...

Congratulate yourself on a job well done.You mentioned on my blog that you had the same incubator as I have bought,i want to build commercial incubators..do you have any suggest?

oakleyses said...

longchamp outlet, nike outlet, oakley sunglasses, ray ban sunglasses, louis vuitton outlet, nike free, nike air max, sac longchamp pas cher, ray ban sunglasses, ugg boots, ray ban sunglasses, tiffany jewelry, nike air max, oakley sunglasses, christian louboutin outlet, christian louboutin, longchamp outlet, burberry pas cher, gucci handbags, michael kors pas cher, louis vuitton outlet, kate spade outlet, oakley sunglasses, louboutin pas cher, jordan pas cher, jordan shoes, prada outlet, tiffany and co, uggs on sale, ugg boots, longchamp pas cher, replica watches, nike free run, oakley sunglasses wholesale, longchamp outlet, louis vuitton outlet, polo ralph lauren outlet online, christian louboutin uk, polo ralph lauren, louis vuitton, chanel handbags, tory burch outlet, christian louboutin shoes, cheap oakley sunglasses, nike roshe, air max, replica watches, louis vuitton

oakleyses said...

mulberry uk, michael kors outlet, nike air force, nike air max uk, michael kors outlet online, vans pas cher, sac vanessa bruno, sac hermes, ray ban pas cher, uggs outlet, polo lacoste, oakley pas cher, ralph lauren uk, kate spade, nike air max uk, michael kors, burberry handbags, north face uk, nike free uk, coach purses, north face, ray ban uk, abercrombie and fitch uk, true religion outlet, nike roshe run uk, michael kors outlet, true religion jeans, michael kors outlet online, michael kors outlet, nike air max, timberland pas cher, uggs outlet, lululemon canada, true religion outlet, nike tn, new balance, michael kors outlet online, replica handbags, true religion outlet, michael kors, guess pas cher, hogan outlet, nike blazer pas cher, hollister pas cher, hollister uk, coach outlet, converse pas cher, coach outlet store online, burberry outlet

oakleyses said...

vans outlet, asics running shoes, jimmy choo outlet, nike roshe run, hollister clothing, bottega veneta, soccer shoes, insanity workout, giuseppe zanotti outlet, nike air max, north face outlet, lululemon, ferragamo shoes, soccer jerseys, celine handbags, instyler, iphone 5s cases, mcm handbags, nike huaraches, iphone 6s plus cases, p90x workout, baseball bats, mac cosmetics, babyliss, chi flat iron, oakley, mont blanc pens, iphone cases, ghd hair, nike trainers uk, iphone 6 cases, hermes belt, s6 case, hollister, louboutin, reebok outlet, longchamp uk, ipad cases, wedding dresses, new balance shoes, iphone 6s cases, abercrombie and fitch, timberland boots, valentino shoes, nfl jerseys, ralph lauren, iphone 6 plus cases, herve leger

oakleyses said...

converse, moncler outlet, ray ban, louis vuitton, louis vuitton, moncler, ugg pas cher, vans, replica watches, canada goose outlet, louis vuitton, gucci, converse outlet, marc jacobs, karen millen uk, moncler, swarovski, swarovski crystal, canada goose outlet, moncler uk, juicy couture outlet, ugg,ugg australia,ugg italia, toms shoes, links of london, canada goose uk, coach outlet, barbour, hollister, moncler, ugg, moncler, canada goose outlet, nike air max, supra shoes, wedding dresses, ugg,uggs,uggs canada, pandora charms, canada goose jackets, moncler outlet, pandora jewelry, louis vuitton, juicy couture outlet, canada goose, pandora uk, canada goose, barbour uk, canada goose, doudoune moncler, hollister, ugg uk, louis vuitton