To say these fish are flexible is an understatement, they contort their bodies into all kinds of shapes , in this video we see a fish coming out of a u shaped pipe , he was looking for food I suspect .
They are shaped in such a way so they can manoeuvre there way into very tight spots while hunting and just to avoid predators and even lay eggs.
Body shape is important for all fish and with the blackfish the fins allow for traction in all kinds of places.
You can see the eye is situated quite high giving the fish a good look overhead and in front and side when searching for food such as insects that may fall on the water or other fish in front , the Barbels in the last post give the fish a good all around picture of likely prey in the bottom of their range such as yabbies,
Their eyes gives them good night vision and is adequate in the daylight for feeding.
While this fish missed the grub on this occasion it recovered and found it when I wasn’t filming.
The fish also have the ability to contort their body to hunt and also get into the tightest of spaces.
I think the fish can be described as both a opportunistic and predatory , they can be caught in the day time if you place the bait in the correct areas so the literature is wrong about being solely nocturnal when they are hungry they will act in a more opportunistic manner waiting for food to come to them rather than hunting, After having studied these fish now for a long period of time I think the ratio is about 80 percent nocturnal and 20 percent diurnal .
All up the fish is a great predator and deserves its place at the top of the food chain.
I have removed the fish from the aquarium in the shipping container for the hot months and placed it in tank 4 with three other fish it now has the chance to breed with other fish and I hope it does.
I have two blackfish in aquaria this is the smaller of the two and I just added a dozen freshwater shrimp , and I think he likes them.
Notice he left it until it was in the rocks and then felt it with his barbels.
In this second video you can see how the larger of the fish tests the worms with his barbels and when he is happy they are proper food he backs up and eats one.
As some of you know here at fishsticks we have a permit to experiment with blackfish.
these experiments have culminated in fishsticks being the first to breed river blackfish in a farm setting ie we have recovered enough young fish to justify the method in other words we have managed to farm the fish. THE FIRST.
Once we had been successful we had surplus fish so I offered these fish to fisheries for restocking however because the brood stock came from a dam and not natural water they could not go into the river systems ( genetics) so I looked around and found a lake that once had trout and redfin but apparently no longer, fisheries agreed and a survey was carried out and the survey of the lake was positive there were no protected fish no turtles no eels no trout or redfin left the local council was on board (they could see the potential) as were local farmers, a small amount of earth works was need to ensure safety of potential fishers in other words good to go except it had to be okayed by the managers of the lake which happened to be parks , parks sent it to the DWELP and they crushed the whole plan.
So we now have a situation where blackfish cannot go into any empty body of water because they might impact on the local inhabitants such as frogs etc ( funny how the trout were ok) to put juvenile fish into water that holds both rainbow and brown trout is just suicide so where can these fish go!
I am getting some great video of the blackfish in the aquarium recently , he has gotten used to me being around and will feed while I watch .
In this video we see him take a yabby on the second bite and then struggles to find his pipe I think because the lights in the container where on .
We can safely say that you would not want to be a yabby anywhere near a blackfish.
i am stunned that their growth rates are so slow ( given the food this one eats) perhaps the lack of high protein food such as yabbies and moths in their natural enviroments are a factor.
I am going on a field trip to Tassie soon and we know that Gadopsis marmoratus grow to much larger sizes down there( up to eight kilos) and we also know that they have access to much bigger crustaceans, it will be interested to see for myself hat foods are availiable.
This is a video I got from a trail camera in one of my ponds well not in the water, Travis Howson and Ty Matthews are placing cameras in the water I decided that I would place them outside and put a see through panel in the tank, I have had it running for about ten days now and these are the results.
The first video shows the see through panel with two pygmy perch swimming around.
sorry about the wind noise, some parts of the country are in drought not here its been raining since May and cold to.
The second video show the ghost , he is in the far top right corner, this is taken with infrared but he looks like he can see the light, notice also the coating on his eyes this enables him to see at night.
I have long argued for more small natural weirs to be placed in some waterways to hold back water in the creeks throughout the dryer months , especially the Cooriemungle and Scots creeks, this would allow enough water to sustain blackfish and other small fish until the rains came again.
This could be achieved with fallen logs or rocks and would cause minimal damage to surrounding riparian vegetation .
This is good example it was probably constructed when the original bridge was built to slow the water during construction.
I don’t think it looks bad in the environment, moss and algae grow over it and it blends in quite well.
One of the arguments against weirs is that they would constrict flow for other species , I say what other species.