Whats happened to the Tuatuas??

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    Posted: 21 Jan 2013 at 10:24pm
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Hey guys,

Today I went Tuatua hunting at Mount Maunganui. The last time I went was just before Christmas and the pipi beds at low tide went for about 500 meters. It was impossible not to get them and we soon had our bags full and were able to go off Terakihi fishing.

Today we were taking the boat out again and so I decided to go grab some more. Went out at low tide to the same place we had gone just before Christmas. Not a single pipi to be found....waded out to my knees / waist and we couldn't find any, walked about a km without any success. Instead, there were heaps of them (not as many as youd find in a bed but every few meters or so there would be a couple) on top of the sand, not trying to bury themselves..then we came across this massive amount all in one area, all on top of the sand, all not trying to bury themselves. They seemed alive but none that I saw had their tongues out (I broke open a couple and they were definitely alive - still holding on)

Anyway, collected a few for fishing and went home to open them. They look quite funny...a really bright yellow/ orange colour and dont look very well. I know mussels can get sick during bad weather and spew their guts, and they often get thin or fat...but yeah I wonder whats going on with the pipis. I googled it, but cant find anything. I know that theres alot of toxins around at the moment - which is why we cant eat them, but I dunno what the story is here.

Does anyone know why the pipi beds would be gone now, why there would be heaps of pipis just sitting on the sand, or why the colour/look is strange??


heres a pic of one....dunno if it shows too well


Thanks :)


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Post Options Post Options   Likes (0) Likes(0)   Quote Zambezi Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jan 2013 at 10:26pm
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I have no idea, but I bet I someone will bring up the Rena.
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Post Options Post Options   Likes (0) Likes(0)   Quote smudge Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jan 2013 at 10:39pm
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It's because of the Rena! Big smile

Seriously, i wouldn't have a clue though.
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haha Rena was ages ago - and there hasnt been bad weather to stir anything up from the Rena. I dunno what it could've been since Christmas till now - a period of pretty good weather.

I dunno if its a seasonal thing, or pollution, or if the toxins are harming them?

Hopefully some pros on here that know a thing or two. Thought it was worth a crack making a thread...
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Post Options Post Options   Likes (0) Likes(0)   Quote smudge Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jan 2013 at 10:51pm
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Absolutely worth it. Thats what the site is for.
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Post Options Post Options   Likes (0) Likes(0)   Quote mowerman Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jan 2013 at 11:01pm
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maybe the water temp is up and a lack of oxygen in the water ? or algae bloom ?
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Post Options Post Options   Likes (0) Likes(0)   Quote wayno Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jan 2013 at 12:16pm
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I find a lot washed up on the tide line at Ohope beach but they have chew marks on the end of the shells and the tongue partially bitten off from snapper feeding on the deep beds.
Never seen the yellow/orange colour in any down this way though.

They also seem to move beds here as well, can get out into the water and fill a bucket in one spot and go back a couple of weeks later and find none in the same place - shifting sands/tides maybe?

To be old and wise you must first be young and stupid.
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Post Options Post Options   Likes (0) Likes(0)   Quote Jaapie Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jan 2013 at 12:44pm
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Bit of a long shot, but you reckon there might be a direct correlation of crook shellfish with increased rumblings at White Island.
 
Yep, it is very far away (50km's +) but increased thermal activity does trigger changes on the shoreline and a possible increase in surrounding temperature might be a factor.
I'm not sure of the geographic plates where they join up to/from White, but seeping heat might be triggering something.
 
Obviously it's just a theory, but until someone can be certain, let's toss this into the ring. Geek
"Only when the last tree has died, the last river has been poisoned and the last fish has been caught,will we realize that we cannot eat money" - 19th Century Indian Creed
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Post Options Post Options   Likes (0) Likes(0)   Quote Zambezi Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jan 2013 at 1:24pm
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NoSchist should be able to add to that theory.
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Post Options Post Options   Likes (0) Likes(0)   Quote GrizzlyKiwi Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jan 2013 at 1:59pm
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we used to regularly get big ones at Waihi beach when i was a kid but when i last went out for some the size was not what i was expecting! they were way smaller than what we used to get.
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Post Options Post Options   Likes (1) Likes(1)   Quote Tonto2 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jan 2013 at 2:34pm
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Tua tua or pipi, 2 different things aren't they?
As far as I know pipis we used to collect in the Waikato river were always yellow colour as opposed to Tua tuas which are usually white and more fleshy with a slightly different shaped shell.
I will happily be corrected by any experts on NZ shellfish Tongue 
slowly going where everyone else has already been
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Post Options Post Options   Likes (0) Likes(0)   Quote jaypeegee Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jan 2013 at 2:44pm
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Is that the cheese and bacon flavoured one?
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Post Options Post Options   Likes (0) Likes(0)   Quote Jaapie Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jan 2013 at 3:19pm
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[QUOTE=Tonto2] Tua tua or pipi, 2 different things aren't they?[/QUOTE]
 
Yep, quite correct!
 
Both are bi-valve molluscs.
Tuatua are bigger than pipi's and both are classified as true molluscs.
 
No expert but I do know this.
"Only when the last tree has died, the last river has been poisoned and the last fish has been caught,will we realize that we cannot eat money" - 19th Century Indian Creed
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Post Options Post Options   Likes (0) Likes(0)   Quote Equity Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jan 2013 at 6:54pm
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Yeah I do know theyre different. I just tend to use the label willy nilly as I cant tell them apart.

I do know that they dont usually look like they did this time!! Huge difference in colour. White islands quite a way away...temperature of the sea around papamoa has actually decreased recently..

Hmmm
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Post Options Post Options   Likes (0) Likes(0)   Quote letsgetem Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jan 2013 at 7:23pm
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I alse tried to find Tutatuas, on Pukehina beach - where in all previous years, have found oodles. Couldnt find any.
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Post Options Post Options   Likes (0) Likes(0)   Quote Rusky Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jan 2013 at 8:22pm
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Could be spawning or getting ready to.  
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Post Options Post Options   Likes (0) Likes(0)   Quote smudge Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jan 2013 at 9:32pm
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That looks like a tuatua to me, pipi have a more symmetric shape. Dunno about the colour though I haven't had a good pipi or tuatua fest in years.
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Post Options Post Options   Likes (0) Likes(0)   Quote Capt Asparagus Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jan 2013 at 12:06am
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I dunno Smudge.... a tuatua is usually a sharper angle shell, much more acute in the hinge angle there.... I would've called that for a pipi myself, and have seen heaps pretty much most really) pipis with that colour inside.
You generally get tuatuas in open ocean beach sand (the shellfish inside is usually white), pipis tend to be in more estuarine areas. Cockles even more so.
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Post Options Post Options   Likes (0) Likes(0)   Quote Equity Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jan 2013 at 5:34pm
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They are definately a very diffent colour to the ones we got before xmas.

Any idea why theyd just be on the top of the water? and not try dig them selves down?>
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Post Options Post Options   Likes (0) Likes(0)   Quote Starnsy Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jan 2013 at 5:39pm
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Im with Capt A.. I would call that a Pipi rather than a Tuatua, like we get off Cooks Beach. Would have said the Tuatua has a more triangular shape to the shell..
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