Scotty88 said...
So how come you WA guys get all the sharks ?
What do the so called experts reckon ?
Im no expert on the subject Scotty bit I did write a bit in the kite forum a little while ago -
There are a few reasons that sharks are more prevalent around WA these days and a lack of food isn't one of them.
I think the first thing to look at is whales and their migration past Perth from the north west to the south west. Back in the day when we used to hunt whales, the whales would stay miles off the coast to try and get past the whalers with out getting hunted.
As of 1978 we stopped hunting whales and their numbers grew and they started to get closer and closer to the coast. To the point that I have seen them 100m off shore last year, something that I have never seen before at local beaches (Perth).
The second thing is that we haven't hunted Great White Sharks for the last ten years adding to their numbers by more than we know. With more whales means more sharks as the sharks hang with whale pods for an easy feed, so with whales coming closer so are the sharks.
I may be wrong but this winter has been the coldest as far as water temp in a while and we all know that GWS like colder water, and yes they are found in warmer waters but they prefer colder water.
Also seal populations have gotten larger so food for the GWS isn't a problem, and over fishing imo isn't the problem at all.
The rogue shark theory is not really an option as the sheer number of sharks spotted tells us this cant be fact. If you don't hunt them they will come and in numbers. The tagged sharks prove this beyond all doubt so this theory can be put to bed.
The answer? Well tbh there isn't one that we can throw out there and fix the problem tomorrow, and I don't think that there will be one in the near future that is sustainable.
Part of the solution is to try and stop it before it happens and more tech thrown at shark shield type devices the better and these are not a solution but a piece of mind but they will have to work much better than they do now.
As far as culling them goes killing ten even twenty of them might help for a while but for how long? A month, maybe two? Some of these sharks come from as far away as South Africa so culling unless you were to kill twenty a month isn't going to work and is not sustainable.