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Re: Fish Species not shared between countries - wh
could have something to do with temperatures too. Some flathead species love cold water but the duskies prefer it warm. An evolutionary trend I'd reckon. Not just for flathead but any species. Don't find crocs much further south than Gladstone (not on a regular basis anyway) and because of that, ya won't find lungfish where you find crocs. Predator/temperature/niche. It's all important.
What about marsupials? Don't find skippies anywhere else in the world or monotremes (echidnas and platypus).
I reckon it's all about isolation many many years ago and then subsequent evolution since so that a developing species fits into a niche that another animal hasn't adapted to. Exactly the theory behind Charles DArwin's theory of evolution.
That's my theory, I'm not real bright but I can lift heavy things !
Re: Fish Species not shared between countries - wh
I think niche is what I was trying allude to with tailor versus zeebars. The both occupy a somewhat similar position within the ecosystem and food chain (aka niche). Temperature is however also a form of geographical boundary isolation, but you're right with the marsupial isolation in the past.
Where a species develops traits that appear similar to another species, but from a completely different animal origin - like for example dogs and tasmanian tigers - it is said to be convergent evolution. Tasmanian tigers (which were a marsupial) and dogs (placental mammal) have essentially similar traits except for the stripes on the tasmanian tiger. Many more examples of convergent evolution exist between placentals and marsupials. It is also worth noting that the Tasmanian tiger existed on the Australian mainland until ~4000-5000 years ago. They vanished roughly when dingos became more apparent - and this could relate to niche exploitation.
Convergent evolution can result in surprisingly similar animal bodies or body parts. You'll see it often also in fish. Organisms occupying a similar niche will often lead to this.
The Kahwai is pretty much the same as the Australian Salmon and is definitly not the Tailor. The tailor does not exist as a species in NZ, thats why I posted the question in the first place.
I dont think anyone would ever say the Kahwai / Australian Salmon tastes the same as Tailor fresh caught and pan fried.
As for the snapper - not having bumps etc. It seems mostly true that NZ Snapper do not get the same Knobbly bumps as some of our fish and the NZ Snapper seems to closely resemble the schooling snapper we get here.
Re: Fish Species not shared between countries - wh
Kahawai is definatly Aust salmon
no tailor in NZ
no bream
but you get flounder in both Aust and NZ
barracooda too.
and alot of the sharks are the same eg. makos ,grey nurse
as for the snapper i have noticed the different shape too
the NZ ones look more like the juvi ones from over here
Re: Fish Species not shared between countries - wh
Bigmack,
Perhaps I am wrong, all I can say is the DVD specifically mentions Tailor and Kawhai as the same, and a number of very experienced fishos over here have also made reference to that fact to me, I must say I still believe they are one in the same family, however I donot profess to knowing all in fishing, very little infact and still learning.
The DVD 'expert' commentator is a very well known Australian fisherman with a number of vids out, unfortunately the name of it and him leave me at this particular moment, I have leant it to a mate who is back home for a funeral at present.
Re: Fish Species not shared between countries - wh
I believe they don't have species such as Flathead, Bream and Whiting in NZ as they don't have the mangrove esturine systems needed for them to breed. As far as I know most of the rivers over there are fresh water fed from the mountains and not really tidal to the scale that we have over here and pretty rocky.
Re: Fish Species not shared between countries - wh
Ok - here are some pictures. Have a look at the Kahwai and then have a look at the large picture of the Australian Salmon and then compare to Tailor. They are definitely not the same - whoever said it and I dont care whether they are a noted fishing writer or journalist or what. Its not the same fish. Perhaps they were saying they fulfil a similar role; caught in surf school up and occassionally go nuts on the whitebait providing excellent fishing. The kahwai is predominatly used as a large snapper bait in NZ.
Re: Fish Species not shared between countries - wh
Notice the spots and the shape of the Kahwai is identical to the Australian Salmon and then check out the look of the tailor, the head shape, overbite on the lower jaw, body shape, tail shape and general silver colouration with green or bluish backs. Very differnt from the Sambo.
You would have to agree that the Kahwai is not the Tailor!
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