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- Newsgroups: rec.scuba
- Path: sparky!uunet!utcsri!skule.ecf!torn!blaze.trentu.ca!trentu.ca!pstonge
- From: pstonge@trentu.ca (CMDR P.D. Keener)
- Subject: Sharks: Search and destroy???
- Message-ID: <18NOV199221412504@trentu.ca>
- News-Software: VAX/VMS VNEWS 1.41
- Sender: news@trentu.ca (USENET News System)
- Organization: Trent University Computer Services Department
- Date: Thu, 19 Nov 1992 02:41:00 GMT
- Lines: 67
-
- G'day, I just read the recent postings regarding the state
- sanctioned killing of sharks (Hawaii???) after the attacks (was it one or
- two). Can't say I'm terribly happy about it.
- Now I realize that I'm an outsider (being in Ontario, I have as
- much chance of a shark encounter as I do injury from fire coral - NONE),
- and that I don't live in the area, nor do I have a direct stake in this
- action. However, like many of you out there, I am a diver as well. I love
- this sport because I can - for a very short while at least - be a
- part of a place where life as we know it is so very different from where we
- live the rest of our upright lives.
- I know that I'm about to stick both fins in where my reg should
- be, but here goes anyway. I wonder how many divers have had encounters
- with the Tiger sharks, and in how many of those encounters were those
- divers 'shark bait' or at least 'a nice light snack'? If what I've come to
- understand is true, we as divers have a reasonably low likelihood of injury
- fron a shark. Why? It basically comes down to this: We don't look like
- something nice and yummy for the shark. Splashing around on surface,
- oblivious to what's below may not be entirely conducive to remaining
- unscathed. Whereas those of us on open circuit breathers (almost all of
- us) have this nicety of the bubble trail to make ourselves look less
- palatable. The moral? The sharks aren't doing harm ON THEIR OWN. The
- swimmers aren't doing harm ON THEIR OWN. Instead of peturbing the
- population of tiger sharks (I think that was the species mentioned) to no
- real end - unless you want to be REALLY certain and hunt them to extinction
- - why not place a physical barrier "between these two competing interests"?
- I believe the resource economist would call that 'demand management'. Not
- that every beach on the island or islands (if the so called 'problem' is
- more 'widespread') can be made safe in this manner, but these beaches can
- be placarded by the local game / natural resouce officials, warning of the
- risks on the 'unprotected' beaches.
- Every time we hit the water, tanks or no, we take a risk. While we
- try to reduce that risk by training, experience, equipment redundancy, and
- trust in our buddy, we still all realize that a risk exists. As one sig in
- a previous posting said, "Respect the beach." To be honest, I wouldn't
- like to have been either of those people injured in those encounters, but I
- would have to realize that that beach isn't there for me alone. I enter
- the water, I accept the risk. I use the beach, I accept the risk. When
- the risks are not as obvious as they should be, we must be made aware of
- them, so that we know the risks. Whether this is supposed to come from the
- omnipresent mandated agencies or not is of debate, as we all know how
- sometimes things are 'sat on' in the Greater Interests...
- On the other hand, what would the effects of a large scale tiger
- shark kill be in that area, from an ecological point of view. Clearly,
- the population dynamics of that area would be affected - particularly if
- this species of shark is a higher order carnivore. The potential release
- of predatory pressures on other organisms directly lower in the food chain
- should be a matter of concern. After all, what do these sharks normally
- eat? It follows that without these sharks, the population of these prey
- items could skyrocket, outstripping the food available to them, causing
- another peturbation. And of the higher order carnivores (what eats these
- sharks?). Without the tiger shark as a prey item, what alternatives do
- these other animals have? We all know that natural systems have a great
- resiliancy for peturbations in population, but this only goes so far... Is
- that mandated agency able to guarantee that a threat exists after all other
- possible steps have been taken to segregate the swimmers and the sharks?
- Has that agency performed an environmental impact assessment with the help
- of marine ecologists to ascertain the hazards involved with such a course of
- action? I'd really like to know...
-
- Any further info on this matter would be greatly appreciated!
-
- *******************************************************************************
- * Pete St. Onge, 3rd year Environmental and Resource Sciences major,
- * Trent University, Peterborough Ontario Canada K9J 7B8. Oh, and NAUI
- * Advanced diver, too. B-)
- * "I want to look at life, in the available light" - N. Peart, RUSH
- *******************************************************************************
-