Extraordinary growth in tiger sharks from the South Atlantic Ocean
Published online on 19. October 2012
Extraordinary growth in tiger sharks Galeocerdo cuvier from the South Atlantic Ocean
A. S. Afonso, F. H. V. Hazin, R. R. Barreto, F. M. Santana, R. P. Lessa
ABSTRACT:
Two tagged-and-recaptured tiger sharks Galeocerdo cuvier, measuring 172 and 304 cm total length (LT) and at age 0·75 and 3·50 years, exhibited unmatched growth rates of 118·4 and 55·5 cm year−1, respectively. The larger fish was nearly mature, indicating that G. cuvier off Brazil could mature considerably earlier than conspecifics from other regions.
Journal of Fish Biology. Early View Version. doi: 10.1111/j.1095-8649.2012.03455.x
This does not surprised me a bit.
Nature has its ways to fight back,
If you start killing all the sharks, like we are doing now, it will find ways to survive. This includes pruducing more juvenile to coming to breeding age faster.
We have seen it in dogs in places where they kill the stray dogs around the globe. There were 2 independent studies on this subject in India and Eygpt. When they started killing stray dogs, mostly at night, the average number of puppies increased. Not only that, the color of the puppies changed to darker, mostly black and dark brown that prevents being seen at night comparing to light and bright colors. And 80% of the puppies started to be bitches rather than male dogs. (It was 57% males to 43% females before the killings)
And guess what ? They still have stray dog problems after killing millions of them.