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I agree. Feeding of animals by divers is extremely localized. There are around 70-80 yearly shark attacks on humans, worldwide (mostly in Australia). Some believe attack rate is increasing. This might be due mechanisms which operate in a immensely wider spatial scales. For instance, the biogeographic boundaries of species distributions may be changing due (a) global warming which induces changes in (a1) current patters, (a2) ice dynamics, (a3) recruitment in prey populations, (a4) migration patters, (a5) pace of local extinctions. Also, other natural phenomena which operate in wide spatio-temporal scales such as the ENSO, NAO and similar are assumed to affect the dynamics of fish population, behavioural responses, etc. Industrial fisheries are a very serious matter too: prey populations are overfished by man and large predators such as seals, sharks, etc. extend their "home range" and wander around desperately for something to eat. If you are using technical black, dont get surprised if you fit the "search image" of a shark for a seal ... Cheers, ---- aldo.solari@ho*.se* (fisheries biologist) Home page, www.ccbb.ulpgc.es/fish-ecology/solaris ---- wentland@no*.ed* gw> To try to associate the current shark attacks with the small gw> scale shark feeding dives going on is ridiculous. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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