The question you asked is one we have all gone over and over again.
The world is full of hunger, millions of men, women and mostly children die of longterm starvation on a yearly basis. Unfortunately none of those who starve could ever afford even 99 cent a pound farm raised salmon or $6.99 a pound farm raised shrimp. Our farm raised aquaculture products are targgets for the middle class world wide as is the ever growing industrial agriculture. I think we all thought that this would help solve the worlds hunger problems but ther are many hunger experts out there telling another side of the story. I will try and get the authors of some pretty astounding books who can better explain what Aquaculture and industrial farming are doing to the world and the majority of its people and post the info latter.
Some of the points these experts bring up are very sound. Such things as the first world demand for out of season products and what the real cost is in consumption of scarce resourses. One example that I love is that one strawberry from Chile brought up to New York in January uses 495 calories of fossil fuel to grow in an industrial mannor and ship. That same strawberry provides only 5 calories for human consumption. Grown with sound small farming disaplines in season in New York and sold in a local market the amount of calories required to grow and ship are few. I am sure that farm raised salmon are the same way as the strawberry maybe even more so when you think of all the waste in salmon farming. A few other things that are talked about more and more is on a world wide basis that poverty is becoming an ever growing problem as local farming and markets are being displaced by the multi national industrial farm and the loss of the local market because there are no produce to sell in them. Shrimp Aqua culture has been devasting to many thrid world communtities in SE Asia and S. America. As these multi national companies come in pay off the pols take over the costal mangrove swamps, bulldoze them to make holding ponds that have only a one to one and a half year life before they must bulldoze more swamp because the ponds go bad after that short time period. Loss of swamp means loss of habitat for young fish which means the locals loose their way of life of subsistance fishing and what extra they have selling in local markets. Many coastal villages have been abandond and many locals have lost their lives to violance for trying to stop this insanity.
I'm not going to blame us the average guy in the first world yet for what is going on because I don't think enough information is getting out. Someone from the Mid West thinks it's great they can eat salmon year round as the average guy in the NW can get those very same strawberries mentioned above right now in Larry's Market. But sooner or later we are going to have to change our unthoughtful ways we look at food and get back to seasonal foods grown locally. We look at what is happening in the world differently since 911. We are just looking at one part of what we think is the problem, that being extreme religious zelots but we better take a better look and it's got to do with 3 basics, fuel, food and water. Those three items are what the first world considers theirs and at their convenience. The have nots are becoming real pissed world wide at an ever quicker pace than past decades. If you don't think the religious zelots are not picking up on this and using religion as it has always been used you better all take some time and look a little deeper. All religions have used underlying problems as a catylist and now they are seeing what our mulinational companies are doing the take over of fuel, food and water world wide. Ask the first peoples of BC, ask the locals of South America, SE Asia what they think of what we think as a convienence such as aquaculture.