Double time reproduction

Waldo · Post by **Waldo** » 21 Feb 2006, 02:14

At fishbase does the doubling time meant ~ time it takes them to mature for reproduction?

Post by **Silurus** » 21 Feb 2006, 02:47

Doubling time refers to the time it takes for the population to double in size.

drpleco · Post by **drpleco** » 21 Feb 2006, 02:52

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?

characinkid · Post by **characinkid** » 21 Feb 2006, 13:12

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...

Waldo · Post by **Waldo** » 21 Feb 2006, 17:06

so it's more of the amount of viable offspring rather then maturity rate.