Is the sea sick

W

Warwick

New member
I saw a program on TV a little while back about the sunfish washing up in CT, apparently due to the La Nina and all the unseasonal cold/warm water we are having here in the cape.

They (The aquarium ) asked for people to phone them when they come across these sunfish as they are not the usual cape one, but a tropical species.
 
F

Fanie

Sealiner
Hi guys,

The world is aparently slowing down (you can google it), it sure doesn't feel that way as days seems to pass faster and faster.

Now the clever okes recon that the earth has switched poles a couple of times, what exactly that means I'm not sure of but we are said to be overdue by quite some time and it can happen at any time, and scientists say it can happen in a relative short time span.

If you consider that our ocean currents are aparently kept in motion by the poles and the electrical currents in the earth (almost like an electric motor), then if the earth poles are shifting, what happens with the sea ?

For one I think the compass is going to become obsolete, but imagine the currents starts flowing into other directions than before. It may not sound like much, but considering the land is only about 30% of the earth's surface then 70% in turmoil could cause huge troubles for the landlubbers. Should we all get boats... and quickly ?

This cold water in hot water and hot water in cold water can for sure be the start of things. May not be bad in all instances, like imagine the government starts to change their ways also LOL.

As for the end of the world, I'm not even worried about that at all, it's only in 2012 :-D

I find animal behaviour amazing at times. We had birds come in the house when something is wrong with them and when we patched them up they leave. Some other similar incidents too.

Which makes me wonder why sea creatures would come on land, surely they can die in the sea if they stay where they are if they're going to die but why go on land to die ? Aren't they possibly looking for help from who knows who ?
 
L

lloydfox

Senior Member
Fanie wrote:
Hi guys,

The world is aparently slowing down (you can google it), it sure doesn't feel that way as days seems to pass faster and faster.

Now the clever okes recon that the earth has switched poles a couple of times, what exactly that means I'm not sure of but we are said to be overdue by quite some time and it can happen at any time, and scientists say it can happen in a relative short time span.

If you consider that our ocean currents are aparently kept in motion by the poles and the electrical currents in the earth (almost like an electric motor), then if the earth poles are shifting, what happens with the sea ?

For one I think the compass is going to become obsolete, but imagine the currents starts flowing into other directions than before. It may not sound like much, but considering the land is only about 30% of the earth's surface then 70% in turmoil could cause huge troubles for the landlubbers. Should we all get boats... and quickly ?

This cold water in hot water and hot water in cold water can for sure be the start of things. May not be bad in all instances, like imagine the government starts to change their ways also LOL.

As for the end of the world, I'm not even worried about that at all, it's only in 2012 :-D

I find animal behaviour amazing at times. We had birds come in the house when something is wrong with them and when we patched them up they leave. Some other similar incidents too.

Which makes me wonder why sea creatures would come on land, surely they can die in the sea if they stay where they are if they're going to die but why go on land to die ? Aren't they possibly looking for help from who knows who ?
Click to expand...

Nope, ocean current's are driven thermo-haline circulation, (commonly known as the great ocean conveyor belt) not the magnetism and orientation of the poles. This is a global scale system, consisting of of upwelling zones, downwelling zones, deep water formation areas, eatern and western boundary currents. The main thing that is disturbing the system (IMHO) is glacial melt and and run-off. deepwater foramtion zones, and downwelling zones are close to the poles in colder climes, where ocean water (saltwater, hence denser than fresh water) is normally noramlly cooled and sinks to the bottom cos of it's density, but with glacial melt and run off it intorduces freshwater which less dense than saltwater, and this fresh water "sits on top" of the colder saltwater, and this is what disrupts this great global oceanic conveyor belt as in essence it's stopping the supply and circulation of water to this mighty current.

 

For more clarity with pictures and all google "thermo-haline circulation" or "global ocean conveyor"

 

Ocean and Atmospheric Science was my 2nd major at varsity, and ocean change is one of my favorite topics.

 

Find me on the beach and come pick my brain

 

cheers
 
L

lloydfox

Senior Member
Fanie wrote:
Hi guys,

The world is aparently slowing down (you can google it), it sure doesn't feel that way as days seems to pass faster and faster.

Now the clever okes recon that the earth has switched poles a couple of times, what exactly that means I'm not sure of but we are said to be overdue by quite some time and it can happen at any time, and scientists say it can happen in a relative short time span.

If you consider that our ocean currents are aparently kept in motion by the poles and the electrical currents in the earth (almost like an electric motor), then if the earth poles are shifting, what happens with the sea ?

For one I think the compass is going to become obsolete, but imagine the currents starts flowing into other directions than before. It may not sound like much, but considering the land is only about 30% of the earth's surface then 70% in turmoil could cause huge troubles for the landlubbers. Should we all get boats... and quickly ?

This cold water in hot water and hot water in cold water can for sure be the start of things. May not be bad in all instances, like imagine the government starts to change their ways also LOL.

As for the end of the world, I'm not even worried about that at all, it's only in 2012 :-D

I find animal behaviour amazing at times. We had birds come in the house when something is wrong with them and when we patched them up they leave. Some other similar incidents too.

Which makes me wonder why sea creatures would come on land, surely they can die in the sea if they stay where they are if they're going to die but why go on land to die ? Aren't they possibly looking for help from who knows who ?
Click to expand...

Nope, ocean current's are driven thermo-haline circulation, (commonly known as the great ocean conveyor belt) not the magnetism and orientation of the poles. This is a global scale system, consisting of of upwelling zones, downwelling zones, deep water formation areas, eatern and western boundary currents. The main thing that is disturbing the system (IMHO) is glacial melt and and run-off. deepwater foramtion zones, and downwelling zones are close to the poles in colder climes, where ocean water (saltwater, hence denser than fresh water) is normally noramlly cooled and sinks to the bottom cos of it's density, but with glacial melt and run off it intorduces freshwater which less dense than saltwater, and this fresh water "sits on top" of the colder saltwater, and this is what disrupts this great global oceanic conveyor belt as in essence it's stopping the supply and circulation of water to this mighty current.

 

For more clarity with pictures and all google "thermo-haline circulation" or "global ocean conveyor"

 

Ocean and Atmospheric Science was my 2nd major at varsity, and ocean change is one of my favorite topics.

 

Find me on the beach and come pick my brain

 

cheers
 
F

FLUKE

Sealiner
Cuthbad wrote:
Guys im not sure if this is relevant, but here in western australia (and parts of the east I think) we are being affected by a La Nina ocean/atomosphere condition, which has caused the sea temps to be a few degrees warmer than normal here on the west coast and i believe slightly lower than normal on the east coast, has also caused some pretty major floods on both sides of the country.

As a result the fishing has been affected massively, we are catching tropical species such as marlin down here in southern western australia where they are rarely seen, yet some other species seem to have dissapeared this season.

Is it possible this has also altered ocean currents in your part of the world? A long way away i know but came to mind when reading this post.....
Click to expand...

Sorry if I'm repeating what's already been said, I haven't read the whole thread.

This La Nina is what I've hear the cause to be, it has apparently altered sea currents and dropped sea temperatures in some areas by about 3-5 degrees.

http://www.dispatch.co.za/news/article/414
 
N

Nightfox

Senior Member
Probably something to do with la nina and all the north easterlys, when tropical fish move with a pocket of warm water but gets cut off from the main current and warm pocket dissolves in cold upwelled water, i'm no expert but that's the way i see it. I wish i was down there because the fish are biting dik!
 
V

Vades

Sealiner
Here's an explanation from an article in The Herald today:

Guy Rogers
HUNDREDS of mysterious Smith’s swimming crabs , have beached themselves at Cape Recife, apparently trying to escape from severe “upwelling” in the bay.
Algoa Bay is host each summer to classic examples of upwelling, which follows on strong and prolonged onshore winds that fold the waves back upon themselves and draw up icy water from the lower depths, wildlife and environment society conservation officer Morgan Griffiths explained.Reports indicate the crabs have been washing up for over a week on Recife’s beacon beach, which runs along the northern side of the cape. But by Monday, the piles of pink and orange carcasses had grown still further.
A very high tide came up in the early hours of yesterday morning and by mid-morning it had retreated taking most of the crab remains with it.
The birds had torn into the remaining specimens but there were still dozens of claws and shells left behind at the high-water mark.
Libby Sharwood, co-director of the SA Marine Rehabilitation and Education Centre at Cape Centre, said the crabs seemed to be Smith’s swimming crabs as opposed to rock or shore crabs.
“The species have very large nippers and a very distinct flipper-like pair of claws at the back
“We also had an earlier report from a fisherman in a canoe of masses of them shoaling on the surface, off-shore.”
Attempts were made to help some back into the sea but they simply beached themselves again, she said.
“The gulls were dik gevreet and we saw a heron on the rocks that was also presumably eating them.”
Smith’s swimming crabs live out at sea, where they are eaten by tuna. Records note that they were first described by science in False Bay in 1838 but then not seen again until 1978, when enormous numbers appeared.
This sequence happened again in 1983 and 1993.

http://www.peherald.com/news/article/756
 
L

lloydfox

Senior Member
I really and truly enjoy the wealth of information that is made available to us on sealine on a regular basis. :)
 
M

Mouldz

Sealiner
Vades wrote:
Here's an explanation from an article in The Herald today:

Guy Rogers
HUNDREDS of mysterious Smith’s swimming crabs , have beached themselves at Cape Recife, apparently trying to escape from severe “upwelling” in the bay.
Algoa Bay is host each summer to classic examples of upwelling, which follows on strong and prolonged onshore winds that fold the waves back upon themselves and draw up icy water from the lower depths, wildlife and environment society conservation officer Morgan Griffiths explained.Reports indicate the crabs have been washing up for over a week on Recife’s beacon beach, which runs along the northern side of the cape. But by Monday, the piles of pink and orange carcasses had grown still further.
A very high tide came up in the early hours of yesterday morning and by mid-morning it had retreated taking most of the crab remains with it.
The birds had torn into the remaining specimens but there were still dozens of claws and shells left behind at the high-water mark.
Libby Sharwood, co-director of the SA Marine Rehabilitation and Education Centre at Cape Centre, said the crabs seemed to be Smith’s swimming crabs as opposed to rock or shore crabs.
“The species have very large nippers and a very distinct flipper-like pair of claws at the back
“We also had an earlier report from a fisherman in a canoe of masses of them shoaling on the surface, off-shore.”
Attempts were made to help some back into the sea but they simply beached themselves again, she said.
“The gulls were dik gevreet and we saw a heron on the rocks that was also presumably eating them.”
Smith’s swimming crabs live out at sea, where they are eaten by tuna. Records note that they were first described by science in False Bay in 1838 but then not seen again until 1978, when enormous numbers appeared.
This sequence happened again in 1983 and 1993.

http://www.peherald.com/news/article/756
Click to expand...


The ones washed up here dont have big nippers ,they are almost translucent red ,with very sharp nippers ,has any one got pics of Smiths swimming crab
 
V

Vades

Sealiner
MOULDIE wrote:
Vades wrote:
Here's an explanation from an article in The Herald today:

Guy Rogers
HUNDREDS of mysterious Smith’s swimming crabs , have beached themselves at Cape Recife, apparently trying to escape from severe “upwelling” in the bay.
Algoa Bay is host each summer to classic examples of upwelling, which follows on strong and prolonged onshore winds that fold the waves back upon themselves and draw up icy water from the lower depths, wildlife and environment society conservation officer Morgan Griffiths explained.Reports indicate the crabs have been washing up for over a week on Recife’s beacon beach, which runs along the northern side of the cape. But by Monday, the piles of pink and orange carcasses had grown still further.
A very high tide came up in the early hours of yesterday morning and by mid-morning it had retreated taking most of the crab remains with it.
The birds had torn into the remaining specimens but there were still dozens of claws and shells left behind at the high-water mark.
Libby Sharwood, co-director of the SA Marine Rehabilitation and Education Centre at Cape Centre, said the crabs seemed to be Smith’s swimming crabs as opposed to rock or shore crabs.
“The species have very large nippers and a very distinct flipper-like pair of claws at the back
“We also had an earlier report from a fisherman in a canoe of masses of them shoaling on the surface, off-shore.”
Attempts were made to help some back into the sea but they simply beached themselves again, she said.
“The gulls were dik gevreet and we saw a heron on the rocks that was also presumably eating them.”
Smith’s swimming crabs live out at sea, where they are eaten by tuna. Records note that they were first described by science in False Bay in 1838 but then not seen again until 1978, when enormous numbers appeared.
This sequence happened again in 1983 and 1993.

http://www.peherald.com/news/article/756
Click to expand...


The ones washed up here dont have big nippers ,they are almost translucent red ,with very sharp nippers ,has any one got pics of Smiths swimming crab
Click to expand...

They might be different crabs, but perhaps they are beaching for the same reason. Have you guys also been continuously pummeled by onshore winds?
 
M

Mouldz

Sealiner
Vades wrote:
MOULDIE wrote:
Vades wrote:
Here's an explanation from an article in The Herald today:

Guy Rogers
HUNDREDS of mysterious Smith’s swimming crabs , have beached themselves at Cape Recife, apparently trying to escape from severe “upwelling” in the bay.
Algoa Bay is host each summer to classic examples of upwelling, which follows on strong and prolonged onshore winds that fold the waves back upon themselves and draw up icy water from the lower depths, wildlife and environment society conservation officer Morgan Griffiths explained.Reports indicate the crabs have been washing up for over a week on Recife’s beacon beach, which runs along the northern side of the cape. But by Monday, the piles of pink and orange carcasses had grown still further.
A very high tide came up in the early hours of yesterday morning and by mid-morning it had retreated taking most of the crab remains with it.
The birds had torn into the remaining specimens but there were still dozens of claws and shells left behind at the high-water mark.
Libby Sharwood, co-director of the SA Marine Rehabilitation and Education Centre at Cape Centre, said the crabs seemed to be Smith’s swimming crabs as opposed to rock or shore crabs.
“The species have very large nippers and a very distinct flipper-like pair of claws at the back
“We also had an earlier report from a fisherman in a canoe of masses of them shoaling on the surface, off-shore.”
Attempts were made to help some back into the sea but they simply beached themselves again, she said.
“The gulls were dik gevreet and we saw a heron on the rocks that was also presumably eating them.”
Smith’s swimming crabs live out at sea, where they are eaten by tuna. Records note that they were first described by science in False Bay in 1838 but then not seen again until 1978, when enormous numbers appeared.
This sequence happened again in 1983 and 1993.

http://www.peherald.com/news/article/756
Click to expand...


The ones washed up here dont have big nippers ,they are almost translucent red ,with very sharp nippers ,has any one got pics of Smiths swimming crab
Click to expand...

They might be different crabs, but perhaps they are beaching for the same reason. Have you guys also been continuously pummeled by onshore winds?
Click to expand...

Yeah ,well its not directly onshore ,south east ,blows for ten days ,one day west and then it blows again ,bloody frustrating makes for freezing water
 
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