Sorry to pull out an old thread but just came across this while going though the forums for info on whale shark diving hotspots. As a Sri Lankan and a marine biologist I need to clarify some serious errors in some earlier posts.
Scuba Jim claims that whale sharks would soon be extinct in the Indian Ocean due to the commercial fishing in Sri Lanka with nearly 700 killed in one year. I am not sure where this information was obtained from but please note the following facts:
1. There is NO commercial fishing for whale sharks in Sri Lanka. There is a major shark fishery but it does not target whale sharks. And even this has grown due to the export demand for shark fins in other parts of the world. Its not just the fishing but the buyers as well who are to blame. We also have a problem with dynamite use and serious overfishing but again, NO whale sharks. Accidental capture may occur through entanglement, and whale sharks have been recorded in fish landings but this is not common. If 700 whale sharks were taken that would constitute most of the shark landings in the country which is not the case. I also actually know of fishermen who worked to release a whale shark caught in a net.
2. Sri Lanka is not a whale shark hotspot and it would be difficult to imagine 700 sharks being taken in an year even if there was a fishery. If we had so many SL would have been more famous than Ningaloo Reef. Imagine what it would have been like before commercial fishing if we still can take 700? Whale sharks do migrate past SL though and are seen off the west coast, mainly in March and April when we have upwellings prior to the onset of the southwest monsoon.
3. I have spoken with researchers, divers and fishermen who have seen whale sharks in Sri Lanka. Those that have been on or in the water for 30 years or more dont recall any major declines. They do note a major decline in reef sharks and other big fish and this is very likely due to the fishery. Like in many other places whale sharks are high on the list of animals divers want to see in SL.
4. The FAO does not list SL as a major whale shark fishing nation. A fishery existed in India but is on the decline as it has been banned. There is also a traditional fishery in Bohol, Philippines. There was a small fishery in the Maldives but this has been stopped and whale sharks are now protected there.
I hope this clears up some wrong information. Again, sorry to wake up an old thread and no malice intended towards anyone including Scuba Jim. I just had to point this out. As a Sri Lankan I know we have a lot of problems with our fisheries. I have been working in reef management and fisheries for several years and also dive extensively so I have seen things get worse in the last decade. But whale sharks are not on the target list............at least so far!
Best regards,
Nishan