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Would You Feed Your Broodstock Geckos in a Pinch?

March 26, 2010

 

This discussion took place on the Shrimp List, a mailing list for shrimp farmers:

 

Patrick Wood (patrickjwood@jahoo.com): In Ecuador, one night in 1983, I accidentally ran over and killed a dog at our farm camp.  Since it was dead, I decided to throw it into one of the shrimp ponds.  On harvest, there was nothing left of the dog.

 

David Griffith (drwgriffity@hotmail.com): So it was you!  You killed my dog.

 

Todd Blacher (toddblacher1@yahoo.com): I used to work at an indoor shrimp facility in Texas, and, on occasion, rats would fall from the rafters into the growout tanks and drown.  We never actually saw them fall, or found their bodies, but we found their very clean bones and skin in the tanks and their hair floating on the surface.

 

Phil Boeing (p.boeing@live.com): One of my favorite topics: What attracts shrimp to food?  Tri-methyl ammonia gets mentioned a lot.  You can put in it plaster of Paris and use it to bait crab and lobster traps.  It attracts freshwater prawns, Macrobrachium, too.  It’s the rotting seafood smell found around fishing boats, beaches and packing plants, the result of bacteria breaking down fish tissue.  Crustaceans and other organisms can pick up the smell from a long way off.

 

I have heard stories of fishermen rolling over floating bodies at the mouth of the Ganges River—to harvest huge shrimp (Penaeus indicus).

 

David Leong (david.leong@cpp.co.id): While working at a shrimp maturation facility, a gecko drowned in one of our tanks.  All the shrimp fought for possession of it.  They would even drop fresh polychaetes to chase after the shrimp carrying the gecko and then fight to take possession of it.  Maybe we need to look for other sources of protein and fats for our shrimp!  Who knows what critter is going to provide the next big breakthrough in shrimp maturation?

 

Laurence Evans(ecotao@yahoo.com): A possible cure for foot fungus too!  Just stand for a while in a pond full of shrimp, and they will soon be eating away at your toes.

 

Patrick Wood (patrickjwood@yahoo.com): I once saw movement (indicated by phosphorescent algae) on the surface of a nursery pond and investigated it.  I found stylies [P. stylirostris] (yes, in the good old days of wild larvae) swimming up-side-down and feeding on insects that were trapped on the pond’s surface.

 

That led to the idea of PAT (passive aeration technology), where underwater lights would attract insects, heat and slowly destratify the water, keep the algae growing at night, and lower night time oxygen demand.  Sadly research funds were not forthcoming.

 

Phil—the dog incident was before your time in Ecuador, but I did consider running you over several times and getting my promised but never materialized bonus with the satisfaction of a slightly better FCR....

 

Source: 1. The Shrimp List (a mailing list for shrimp farmers).  Subjects: pig - dog!; and In the Light of a Silvery Moon.  March 4–7, 2010. 2. Bob Rosenberry, Shrimp News Internationall, March 26, 2010.

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