Adventure Ausrama Blog

The fossil of a fish much like a piranha appears to be the earliest flesh-eating fish. It was found in Germany. Having teeth similar to a piranha it lived 150 million years ago. Remains of its victims were found nearby. It mainly ate the fins of fish. Evolving to consume only fins was a survival mechanism. Fish that were attacked did not die immediately. They survived to provide a meal another day. The hunter's teeth were triangular. With serrated edges, they were ideal for cutting flesh. Initially, bony fish could only bite chunks of flesh out of prey or swallow them whole. Slicing of flesh appeared much later. The hunting method of the fossilized fish was identical to modern-day piranhas. Injuries to the attacked were the same. The ancient specimen was a sea dweller. Piranhas live only in fresh water. Oddly, some piranhas are vegetarians mainly eating seeds. They are a normal food for South American people who say they taste like any other fish. It is not understood why they

The Northern Territory has a low population density, so it could expected that natural fauna would remain dominant over human destruction of the environment. Apparently, this is not the case. A study observed Aboriginal elders and their interaction with wildlife. Comparing findings with previous records showed a decline in the mammal population. Only small numbers of quoll, black-footed rat and golden bandicoot survive. Nearly 50 new animals have been included in the endangered list this year. Two mammals and a bird have now been declared extinct. Small and medium size animals are affected most. Large animals are unaffected. It seems large animals such as kangaroos benefit from the presence of humans. Planned action is proving beneficial. Improved fire control has raised the number of gouldian finches. Reptiles are doing well. Specimens of the bronzeback lizard have been found. They were thought to be extinct in the Northern Territory. Damage has been done by the influx o