| NZ Whales | |
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Logger Hunter
Number of posts : 6951 SunnyRhyl-O-Meter : 13888 Location : Colwyn Bay
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headwyn Sunnyrhyl Addict
Number of posts : 2016 SunnyRhyl-O-Meter : 8058 Location : Sunny Rhyl
| Subject: Re: NZ Whales Sat Feb 11, 2017 3:18 pm | |
| Had you and Stevo been telling them your jokes and driven them to suicide? |
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Logger Hunter
Number of posts : 6951 SunnyRhyl-O-Meter : 13888 Location : Colwyn Bay
| Subject: Re: NZ Whales Sat Feb 11, 2017 5:40 pm | |
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stevo Swordfish Hunter
Number of posts : 3613 SunnyRhyl-O-Meter : 9922 Location : manchester
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VALVEBOUNCE Legend
Number of posts : 1705 SunnyRhyl-O-Meter : 4952 Location : MANCHESTER
| Subject: Re: NZ Whales Sat Feb 11, 2017 10:46 pm | |
| It's generally considered that fish,birds etc,use magnetic north for direction finding. The voltage is minimal to send the natural compass off (below 3v) The latest thing for a shark deterent is a low voltage sender.On tests the sharks are completely disorientated,they lose direction,and give up their quarry. I have thought for a while now,that whales probably lose direction because of a natural fluctuation in magnetic north. One whale losing direction could be it's own physical breakdown perhaps. But that can't be the same for a number of whales all losing natural direction. I doubt there is a cure,only an explanation. |
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VALVEBOUNCE Legend
Number of posts : 1705 SunnyRhyl-O-Meter : 4952 Location : MANCHESTER
| Subject: Re: NZ Whales Sat Feb 11, 2017 10:50 pm | |
| Hey up Rhod,I think you will need a bigger boat,(and camera) |
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Rhod Lloyd Fishing Addict
Number of posts : 617 SunnyRhyl-O-Meter : 6469 Location : Bottom of the world, New Zealand
| Subject: Re: NZ Whales Wed Feb 15, 2017 4:20 am | |
| There are many theories as to why the pilot whales strand on Farewell Spit, from their echo location not working in shallow water, to the theory that they are following an ancestral route from before the sand spit formed. As they seem to be mainly on the shallow sheltered side the first theory is more likely. Shortly after we arrived in NZ about 1974 we had 70 sperm whales strand on our local west coast surf beach, I heard about it while at work, so as soon as I got home we jumped in the car and drove the 12 miles up the beach just after low tide. What an amazing sight, these huge whales washed up over 2 miles of beach, even if the whale rescue had been around then, there was no hope of saving any of these on that beach. It was impractical to do anything with them, so they were just left to rot. The Maori have the legal right to the bones and teeth, though someone had got in early with a chainsaw on one of them. As the tide was coming in we just had a quick look, took a few photos, and then headed back before the hard sand disapeared, though there were still 2 wheel drives coming up passing us. I never heard if any got stuck, though there are a couple of cars a year lost there. About 10 years ago they put a gate across the easy access to the beach, too much conflict with vehicles trying to get through the crowds on the beach in the summer, so access is now a 4 wheel drive only sand track 2 miles up the beach. The fishing club has retained access to the natural rock ramp onto the sand for launching boats from the beach. The last 2 winters the sand has scoured out making vehicle and boat access impossible, and so far this summer the sand has not washed back in. If I find the photos sometime I will post them. |
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VALVEBOUNCE Legend
Number of posts : 1705 SunnyRhyl-O-Meter : 4952 Location : MANCHESTER
| Subject: Re: NZ Whales Thu Feb 16, 2017 1:31 pm | |
| Nice bit of info there Rhod,thanks. I have a bit of a theory on the magnetism angle. Scientists reckon that because of the molten metals underneath the earths surface being on the move,eventually north and south will eventually reverse. So what is not to say that with the movement of the metals,the magnetism is not fluctuating slightly at present. That would account for the whales natural compass going off. Personally,I can't see their sonar having much to do with shallow water,they are more likely to have lost direction and are following magnetic north etc. Tests on sharks show the sharks go into panic when a minute current is introduced near them, simply because it interferes with their natural compass.I think their whole existence is controlled by the poles. Haha,just a theory,but time will tell. Have a nice day |
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Rhod Lloyd Fishing Addict
Number of posts : 617 SunnyRhyl-O-Meter : 6469 Location : Bottom of the world, New Zealand
| Subject: Re: NZ Whales Thu Feb 16, 2017 7:55 pm | |
| Thanks for that, I know that over geological time that the poles have reversed, and that magnetic north varies considerably over time, but strandings happen in many different situations, and if the magnetic field had been an influence this would have been picked up by science as just about everything is monitored these days. |
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| Subject: Re: NZ Whales | |
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| NZ Whales | |
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