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Double time reproduction
Posted: 21 Feb 2006, 02:14
by Waldo
At fishbase does the doubling time meant ~ time it takes them to mature for reproduction?
Posted: 21 Feb 2006, 02:47
by Silurus
Doubling time refers to the time it takes for the population to double in size.
Posted: 21 Feb 2006, 02:52
by drpleco
at what size is a fish "counted?" I imagine that they wouldn't take fry into consideration, since most don't reach maturity. Or is it just an estimate of all fish at any given time?
Posted: 21 Feb 2006, 13:12
by characinkid
This is a really important subject for fisheries biology. This is the time that it takes for the population to double in size and affects fishing quotas in the oceans greatly.
Flounder for example produce vast numbers of eggs and therefore can be fished quite heavily, and so can Cod and haddock. Sharks on the other hand produce live young, and only a few at a time and therefore take much longer to 'recover' if they are fished.
Hope that this helps...
Posted: 21 Feb 2006, 17:06
by Waldo
so it's more of the amount of viable offspring rather then maturity rate.