Daydream believer
Well-known member
I hope that the broascasts are in code, because if the Orcas pick them up, the crafty b..gars will move about deliberately to foil the whale watchers
Second boat sunk by Orcas
- Thread starter PhillM
- Start date
Mister E
Well-known member
So what are the local authorities doing about this.
Slowtack
Well-known member
? Strobe lights suspended in the water??
Daydream believer
Well-known member
Attracts bait fish, which attract predators, which attract larger predators, which attract----- Well you get the idea why that may not work
Daydream believer
Well-known member
Put the rates up, cut services to the aged, cut funds to the police. Undertake a 3 year feasability study. Claim that there are insufficient funds for the project, All the usual tricks I expect
Slowtack
Well-known member
I understand about the smaller fish etc............was think more about using strong pulsing lights after the Orcas had engaged...........not before.
Maybe underwater speakers emitting at a suitable frequency might be a better deterrent.......along the lines of an ultrasonic dog deterrent.
Maybe underwater speakers emitting at a suitable frequency might be a better deterrent.......along the lines of an ultrasonic dog deterrent.
greeny
Well-known member
Sweet F A
Lodestone
Active member
Any significant underwater explosion (or implosion) would be pretty devastating for an animal that uses sound so efficiently.
The Pacific Northwest seems to have an abundance of orca research. NOAA for example has conducted experiments to discourage and herd orcas away from areas with a view to protecting them from oil spills. They've tried bangs, sound tubes (pipes hung over the side banged with a hammer) and even rotor pitch and altitude variations from helicopters. A bit of scavanged metal tube hung from a davit and whacked with a spanner would be a cheap starter and something almost any boat could acquire. I think 8' was the length tried - if that affects the 'note' struck.
Are there any local efforts by marine biologists to listen to the sounds the orcas are producing to try to figure out what they are doing - with associated occupational hazards? For example clicks or click bursts, as I understand it, are hunting behaviour.
The Pacific Northwest seems to have an abundance of orca research. NOAA for example has conducted experiments to discourage and herd orcas away from areas with a view to protecting them from oil spills. They've tried bangs, sound tubes (pipes hung over the side banged with a hammer) and even rotor pitch and altitude variations from helicopters. A bit of scavanged metal tube hung from a davit and whacked with a spanner would be a cheap starter and something almost any boat could acquire. I think 8' was the length tried - if that affects the 'note' struck.
Are there any local efforts by marine biologists to listen to the sounds the orcas are producing to try to figure out what they are doing - with associated occupational hazards? For example clicks or click bursts, as I understand it, are hunting behaviour.
capnsensible
Well-known member
Rescuing humans that have been attacked by rogue wild animals.
PhillM
Well-known member
That’s really interesting.
Lightwave395
Well-known member
A waterproof speaker and Mike Oldfields 'Tubular bells' album at full volume perhaps...
Daydream believer
Well-known member
Might put them all to sleep, whilst one escaped.
Lodestone
Active member
here's a link - Oikomi pipes How Do You Keep Killer Whales Away From an Oil Spill? | response.restoration.noaa.gov
My lay understanding is that different family groups target their own prey species and 'pass' this behaviour down.
I understand that they can differentiate between fish species by the size and response of the swim bladder. They can also detect the orientation of their prey by this method too. 'Clever girl' as Bob Peck might say...
Just in jest - perhaps to an orca a yacht hull represents the juiciest tuna swim bladder of their dreams?
However this article is timely and interesting Investigating Orcas - Tomorrow, a community magazine for the Algarve especially the bit about transients
My lay understanding is that different family groups target their own prey species and 'pass' this behaviour down.
I understand that they can differentiate between fish species by the size and response of the swim bladder. They can also detect the orientation of their prey by this method too. 'Clever girl' as Bob Peck might say...
Just in jest - perhaps to an orca a yacht hull represents the juiciest tuna swim bladder of their dreams?
However this article is timely and interesting Investigating Orcas - Tomorrow, a community magazine for the Algarve especially the bit about transients
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LONG_KEELER
Well-known member
Nice link.
Élio Vicente the marine biologist suggests that there actions are not aggressive which is good to know. Likely they will leave after destroying the yacht's rudder ( the swishing creates sound waves).
Wondering if a sacrificial transom hung rudder could be quickly deployed if attacked .
Whaup367
Active member
..also worth bearing in mind that they may well simply get bored with the game (as their pacific brethren did with the fish-hat trend). It's not as if they are getting extra food from the behaviour, AFAWK; though maybe there's some other benefit we're not seeing.
If so, it would be good if they got on with it...
I wonder if they could be clever enough to realise that if a human dies, things will escalate?
Daydream believer
Well-known member
So would they be happy with just destroying a Hydrovane self steering, or perhaps an Aeries? One can fit a spare oar to an Aeries .
Habebty
Well-known member
/
If my boat was being attacked, I would certainly hope for a speedy rescue/assistance before I became lunch - and would definitely resort to self defence. But I would not go out of my way to kill the animal. I think we have stuffed this planet enough without condoning mass culling to assist the leisure industry.
Does anyone know for sure how many individual orcas have attacked yachts/boats? It may just be one with a screw loose ?
What on earth is a "rogue" wild animal? Aren't all wild animals "rogue" by definition? So there is an Orca pod exhibiting unusual behaviour, but probably wouldn't be exhibiting that behaviour if we weren't there? Where does one stop at killing wild animals. It disappoints me that when people encroach upon their space, and the animal sees lunch, we are surprised! If a great white/bull/tiger etc. attacks a diver/surfer/swimmer, we should not be surprised, and certainly not kill the animal but learn to respect their space and take appropriate non-lethal precautions. I don't think we can move into wild territory and expect that territory to be sanitised for us. (I would agree that animal relocation would be appropriate in some cases - tigers/big cats etc.), Strikes me as typical human arrogance.
If my boat was being attacked, I would certainly hope for a speedy rescue/assistance before I became lunch - and would definitely resort to self defence. But I would not go out of my way to kill the animal. I think we have stuffed this planet enough without condoning mass culling to assist the leisure industry.
Does anyone know for sure how many individual orcas have attacked yachts/boats? It may just be one with a screw loose ?
Daydream believer
Well-known member
Where do you get the idea that we should not be there? We are just as entitled to use the planet as any other creature. Just because we have developed in such a way that we can use it differently should not exclude us from using it. If we happen to be in the same place then why should the laws of nature- ie survival of the fittest not apply?
Of course we have developed to a point where we understand the consequences, but there is still a limit & we must be entitled to protect ourselves from danger. Whether you like it or not.
Rappey
Well-known member
Troublesome Orca. Europe is not alone
The Killer Whales Haunting Fishermen in the Bering Sea
Here's an interesting suggestion.
Scientists hypothesize that orcas like the water pressure produced by a boat's propeller. "What we think is that they're asking to have the propeller in the face," de Stephanis says. So, when they encounter a sailboat that isn't running its engine, "they get kind of frustrated and that's why they break the rudder."
The Killer Whales Haunting Fishermen in the Bering Sea
Here's an interesting suggestion.
Scientists hypothesize that orcas like the water pressure produced by a boat's propeller. "What we think is that they're asking to have the propeller in the face," de Stephanis says. So, when they encounter a sailboat that isn't running its engine, "they get kind of frustrated and that's why they break the rudder."
Habebty
Well-known member
Who said we shouldn't be there? just expect wild animals!
We are not "entitled" to anything - but should be able to explore our planet without shagging it up!
Survival of the fittest is only a fair fight if both sides don't have guns.
Nothing wrong with protecting oneself from danger.
I think it is a generational thing, i.e. when people thought it was ok to go on safari hunts, and keep dolphins and orcas in captivity,
