Willy, HOW MANY ANGELS CAN DANCE ON THE HEAD OF A PIN?
Eat a calico. Like all such ethical dilemmas, it sorta depends on the associated details. (It ain't just black and white.)
You catch the calico down Baja way, in one of those areas where they are as thick as fleas? You are catching calicos from 3-8 pounds left and right? If you keep one or two in the 4-5 pound range to eat, it seems to me like you are ok.
I realize you are worried about their slow growth rate, as well as the fact that the reproductive ability goes as roughly the square of their size. (That is, a 8lb bass produces 4X the amount of eggs as a 4lb bass.) But down Baja way, I think that you can kill a few bass with equanimity.
Ok, now you are fishing a boiler off PV, on a good day. You are catching 30-40 bass this day, all 1lb to 4lb. Should you keep 2 or 3 to make calico sandwiches? Seems to me that, ONCE IN A WHILE, it's OK. Probably don't want to do it every time out, most folks couldn't, but if you are that good, then maybe every second/third time. If you keep the 2 pounders and let the 4 pounders go, you are doing it ethically, in my opinion.
I fished small trout streams where you could take 2 fish. I was pretty good a fly fishing. In a day, I might catch 12 trout, from 10-18 inches. If I really wanted to eat some trout, I'd keep 2 of the 10-12 inch fish. I never felt unethical.
Given what I've learned here at AC, I wouldn't ever take a whole limit of calicos in SoCal (it's 5 fish, right?). But to take 1 or 2 moderate sized fish, I don't see nuthin wrong w/it.
(I freely admit, I purely do enjoy the taste of calicos. I also happen to like sandbass, which for some reason, which I don't understand, folks seem to disparage. Also wierd, is that even tho sandbass have the same growth characteristics as calicos, they are considered acceptable to catch??)
Cheers.