if i recall correctly, largemouth take 3 years to get around the 12" mark in ontario. 12" plus would be ideal breeding size...I'm sure smaller fish are entirely capable of breeding, but their yield should be much smaller.
the pond you speak of now is not entirely fished out. there are still smaller sized fingerling bass that are still around (1-2 year age class). the pond can and will rebound if the larger fish are not taken out (catch and release only). lots of factors come into play though... one major one i've noticed being water levels.
i've mentioned this before. it was 2 or 3 years ago when an amazing pond in markham was discovered. it was almost a bass on every cast. well...that didn't last long. I mostly blame the water level the following year that really killed it. a good 1-2 feet lower than what was previously seen. this reduces the surface area signifcantly and also reduces suitable habitat as well. the pond being more shallow will heat up faster and oxygen will be depleted more quickly. ULTIMATELY, this means that the maximum carrying capacity is lowered. Meaning less fish. This will happen even if not a single fish was removed. massive fish die-offs will occur (which i've witnessed). if water levels returned to normal, a rebound in the population should be expected... sooner if there are fish of various age groups.
sorry for straying off-topic...just what i've been noticing with the local ponds :mrgreen:
you can think of it this way.... if all the large fish are removed, it's similar to stocking the pond with fresh baby fish... these fish will grow and produce their own offspring, which will produce their own. I'm not sure about the math, but it would take a good few generations to reach that stable point that it once was...
population ecology would be useful here...unfortunately, i never managed to fit that course into my schedules during my stay at university.
https://ospace.scholarsportal.info/bits ... 265947.pdf
this article by the ministry isn't really related to what we're talking about, but has some good info you can pick out about size limits and whatnot.
it's plain obvious though...the larger fish in heavily fished areas should NOT be removed...especially in a small confined body of water.