Collectable aquarium fish and inverts lost to over population!

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Collectable aquarium fish and inverts lost to over population! Empty Collectable aquarium fish and inverts lost to over population!

Post  liquidg on 26th January 2012, 12:39 am

Over the last week we have lost billions upon billions of chaetodons, angelfish of all kinds, banded coral shrimp, virtually all aquarium species that are not quite big enough to show them selves out of the new season life forms,these and many others will die from this rain event!

This will be felt at its worst close to the bars of estauries where aquarium life forms can exist as the food source they require is there and the salinity remains near open ocean levels and the pollutants are not felt for to long with in tide changes at the gold coast estuaries in particular, also the sun shine coast estuaries and a couple of the shoreline spots at the sunshine coast, the sudden drop in salinity for a day or two is an immense killer of virtually all aquarium species.

As the fresh water comes down the rivers it remains a greater volume then the oceans tidal push and keeps the ocean waters out for a day or so killing at times, every thing except brackish species like bream, flathead, some hardy wrasse, endemic tangs, some species of blennies and so on!

This rain event may even kill the cunjevoi on the rocks as it wipes out all valuable algae life forms that juvenile aquarium life and some adult types need to exist on.

Once the low salinity has Dissipated, a lot the life has been killed by the raised bacteria levels of the freshwater and the extreme hydrating upon fish and the stress this creates,also the bacteria affected inverts have died from this event!

Now there is nothing to feed any juveniles coming along in the plankton past us in the east auzy current that try to start their life here as there always is,to some degree!

They get washed into shore, there is no food for them, they die, so it takes weeks to months to start regenerating foods for new aquarium species to be able to begin life here.

On the gold coast it is at its worst further south and at the northern end of the gold coast its affects will be a little less due to the off set of the southern morton bay water volume, though still quite bad and if the rains happen at a rate of 120 to 150 mills in a 24 hour period,thats when every thing in the estauries starts dieing!

After this the average sports divers will still see large life forms and think the recreational collectors took the life that the rain event killed off that their-our numbers has caused through global warming, you see these kill offs were rare until over the last 10 to 15 years,last years rains were a large kill off as well,thats two years in a row and not quite as bad for each of three years before that.

In the past it was normally the rain depression of a dieing cyclone roughly once each 7 to 9 years on average.

Three I remember, one in the late 70s and the next in the late 80s were so bad they took out virtually all life at old woman island and one near the end of the 90s and the island is a half mile off shore.

The bay affect of Noosa to Moreton didnít help, but that was how bad it was, the 70s one two weeks after when we dived there,90 percent of everything dead, our wet suits covered in coral mucus as the last ones were dieing and before than old woman island was comparable to flinders reef!

What is sad and rather pathetic is that the sports divers and environmentalists will continue to condemn the recreational collectors at man made sites on the weekends while the commercial collectors (its their job we do not condemn the guys at all) go through there during the week and take all the tide change allows time for, that the rain events did not kill and we will most likely get the blame for the lack of understanding of anything about the ocean that is of any use at all from these people,not all of them are that out of touch,but this rubbish about recreational collection comes from a lot them.

The outer reefs do need control measures, more so the outer barrier reef, it feeds the entire east coast more or less, but the estuaries are an entirely different kettle of fish,lol.

The bar walls,up to one kilometre in at the estuaries that were seriously killed off, the life forms in there that these people supposedly protect so vigerously, may have had a chance at some extra life in some ones aquarium!

There are two huge benefits too this massive kill off, the predator fish will have a field day near the bars as this dead and dieing life comes out to feed on.

The open oceans phytoplankton thrives on these events and this algae creature provides food for the juvenile fish and inverts at their planktonic stage, via feeding the zooplankton with them selves and the juvenile fish/inverts need for some algae in their diet that phytoplankton is while they are part of the plankton, so I suppose its not a total lose, the outer reefs will get a huge boost from this event!




Last edited by liquidg on 18th February 2012, 9:04 am; edited 2 times in total

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Post  papdt on 29th January 2012, 2:40 am

thanks for great info, does this also apply to hervey bay?

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Post  liquidg on 29th January 2012, 6:10 am

Not realy,any thing very near an estuary will suffer and if the water volume at the source of the estuary is beyond 120 to 150 mils on average in a 24 hour time frame, the estuary will go down, as far as none brackish is concerned any way, all will die.

The shore line of Hervey bay near the estuaries will suffer a bit, how much depends on how long this easterly keeps the fresh pushed against the shore line and how much rain you had up there.

I hear the east auzy current is in full swing out off the coast at the moment doing its bit to save the shoreline creatures, that will save some areas in close from complete destruction.

With out it we would have no aquarium life at all after this for a very long time!!!

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