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I attended a seminar some years ago by a marine scientist, who said that in general, marine animals are "opportunistic feeders" so, sure, when food is offered, they will take it, but if the food source is withdrawn, they will just go back back to their regular feeding pattern and theres seldom any harm done to the animal.
In my opinion the small amount of food introduced into a marine enviroment on a random basis by divers is unlikely to alter behaviour, its too small and too random, which means the marine life in the area still have to feed naturally, the problem really is that in certain cases, like daily shark feedings, the food source is abundant and never withdrawn, so its entirely possible that in the short term, in a small ecosystem, animals can become dependant on this food source, and cease feeding naturally, in which case we would have effectively changed the animals behaviour, but, nature has a funny way of sorting things out, and sooner or later, these animals will move off (for whatever reason)and continue feeding naturally.
In my opinion the small amount of food introduced into a marine enviroment on a random basis by divers is unlikely to alter behaviour, its too small and too random, which means the marine life in the area still have to feed naturally, the problem really is that in certain cases, like daily shark feedings, the food source is abundant and never withdrawn, so its entirely possible that in the short term, in a small ecosystem, animals can become dependant on this food source, and cease feeding naturally, in which case we would have effectively changed the animals behaviour, but, nature has a funny way of sorting things out, and sooner or later, these animals will move off (for whatever reason)and continue feeding naturally.
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