Tilapia is worse than bacon
11 years ago
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- 11 years ago
- 11 years ago
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fish farming - missing the boat?
Comments (25)David said "do you have any problem with those White Brook Tilapia reproducing in your tanks? Curious because thats often a problem, and I see they sell a mixed lot of males and females, the males growing considerably faster. Do you find the same?" A: If kept in high densities, spawning is extremely rare. The few that still manage to usually lose most of the fry to predation by the other adults in the tank. Another way to prevent spawning with mixed sex fish is to grow them in cages in the tanks. With larger mesh floors, they have nowhere to nest. If spawning is prevented or mostly prevented, the females will grow ALMOST as fast as the males, but they will still lag slightly. In my experience, even in lower density situations, these fish typically don't start spawning until 5 months of age, just a month shy of harvesting anyway. It is mostly a non-issue on a 6 month harvest cycle. David said "What temperature range is the water in your tanks, and do you need to do any supplementary heating or cooling? Reason I ask is that over 5-6 months, getting the water up to 75-80º might add a significant amount of weight, and you might accomplish that by some hillbilly engineering." A: I start fry out inside until they reach about 3 inches in plain old aquariums usually. I keep them at 80-84 degrees. 82 seems to be the sweet spot with them. Outside, my tanks will range from 72 in the spring to about 90 in the heat of summer, and then back down to about 68 in the late fall when I do my final harvesting for the year. I use a somewhat earth sheltered greenhouse for most of them, which helps to regulate temps a great deal. I usually overwinter about 500 fry minimum every year, but sometimes up to 1500 when I'm feeling up to it. David said "When I did this commercially, we raised them in either fixed or floating cages. Cram them in around 250 per cubic yard and feed them a high-calorie supplement with 15% protein, they'd filter the algae in the water coming through the cages and get supplementary protein and all the vitamins and such." A: As long as you start them out when young on a high protein diet, they will do good in such a situation. I have friends who simply stock them in their fishing ponds every year, and they don't even feed them. The fish simply browse on the diatoms, algae, vascular plant life and inverts already in the pond. They harvest some impressive fish in the fall when temperatures drop. The tilapia get lethargic and just hang out at the water surface making them easy to net up or cast net for them. David said "dollar a piece for a 1/2 inch fingerling. Wow. Linked is an article about large scale fry production, I did all the stuff in Cote d'Ivoire, the Campbell, D. in the references. I used to have to deal with some taxonomical geeks - no matter what they call it, its all the same species of nile tilapia" A: I buy some new stock just about every year to keep genetic diversity where it should be, but it doesn't require buying a ton of fish to do that (50 a year works fine). After I established my initial "colony" of fish, cost of stock has become largely irrelevant to my overall production costs. Sometimes I will buy a very large number of fish to stock (500+), and when I do that I buy at wholesale prices which are far less than what they ask for on small lots. Your last comment about "no matter what they call it, it's all the same species of nile tilapia" I'm unsure of what you mean. There are numerous strains within Oreochromis Niloticus that are VASTLY different. Recent studies have even shown that they carry different sex determinant markers (A good study from UMD is out there as well as one from Virginia Poly off the top of my head). This is generally indicative of distinctly separate evolution of various communities of fish (usually prolonged geographical separation), even if they are in the same species. In this case, one could quite easily argue that there are numerous subspecies of Niles (and other tilapia as well of course), and that many of them have quite different traits and requirements....See MoreBacon in the overn question.
Comments (27)I'm one of those people who like chewy bacon, so it doesn't take that long for me in a pan. Like Shaun, I put the raw bacon into a cold electric skillet because it's the right shape to lie several strips flat. I turn it a couple of times and when it's browning but still nicely chewy, it's done. I drain it on paper towels and save the bacon grease for cooking eggs or to feed the birds in the winter, depending on how big my "grease stash" is. Elery says I'm the only person he knows that has one of those metal containers marked "grease" and still keeps grease in it. (grin) Can't help it, I still think it's healthier than margarine and no worse than butter. However, if I have the grandkids over and I'm trying to make waffles and referee and clean up the syrup and make coffee and it's 6:45 am, well, the bacon is going in the oven because it's easier! Cathy, was that in the microwave or in the oven? And I'm still laughing at having to "grease" a piece of paper that is supposed to soak up all the grease. (grin) Actually, it probably means that I'm using that non-coated and biodegradable "plain" paper towel without all the colors and additives, so it's probably a good thing. Annie...See MoreWhat's for Dinner #322
Comments (100)Mmmm. I've caught up on the thread, and now have a craving for roast beef, clams and mussels, carnitas tacos, au gratin anything. Sadly, I'm back in diet mode so the only one of those I am likely to indulge soon is the shellfish. Tonight, dinner was - Cauliflower, salted and oiled, roasted, tossed in melted butter, then tossed in grated cheese (which sticks thanks to the butter), then briefly broiled on "low" to melt the cheese. Then topped with crumbled bacon. - Baby bok choy, tossed with hoisin sauce, sesame oil, chili sauce, lots of pepper, stir fry-steamed (first stir fry in a very hot pan with not too much oil, then add a small amount of stock and cover with a mesh splatter guard, the food steams while the stock, hoisin, oil, etc thicken into a usefully tasty coating), topped with thin strips of ham. - Part of a chicken breast. From a supermarket rotisserie chicken. I'm sorry to admit it, I was lazy. It sounds not very dietetic, but most of the bulk is vegetables. My whole dinner was under 500 calories. Lunch was a tin of sardines. Breakfast a bowl of soup. Yes, really living it up here....See MoreI would rather clean both bathrooms than.....
Comments (39)I love to cook. I like to prepare ingredients for cooking. I hate to clean up the mess I make while cooking! I don't mind polishing silver. I like to wash nice china. I hate to iron clothes, but I don't mind ironing table linens...I love using cloth napkins! I don't like to clean, pick up clutter, dust or scrub, although I know how to do all of the above. I love having pets. I don't like to clean up after them, but I cannot imagine life without a critter. I just noticed that I have four pairs of shoes on the floor. I would rather clean up dog vomit than maintain an orderly closet. I want an orderly closet, but I don't wanna maintain it. Come over for a visit...just don't go near the closets....See More- 11 years ago
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