Adventure Ausrama Blog

Biology: Red reef lobster caught in Western Australia. It is common knowledge that lobsters do not have hair. We all know this. However, hairy lobsters do exist and one has been caught in Western Australia. The red reef lobster is common in the waters of Madagascar, Hawaii, and African countries. Finding it off WA is a real surprise. The fisherman who caught it has never seen anything like it in his life. It seemed to be a prawn, lobster, scampi hybrid. The hairy red is much different from Australian lobsters: it has crab-like claws. Biologists do not believe that it came all the way from Africa, at least not in recent times. They hold that it has been here all along living and breeding in a localized, remote spot. The one caught probably strayed away from its locality. Obviously, its normal range must be reasonably close. Being elusive, scientists are not going on a hunt. The creature will be left alone. ◆ Biology by Ty Buchanan   ◆ Adventure Australi...

Though heat itself may damage the Great Barrier Reef, higher levels of acidity due to raised temperatures will not increase coral bleaching. Too much carbon dioxide in the atmosphere ends up absorbed in the surface of sea water. This raises acidity. There is not a direct relationship between acidification and coral bleaching . However, the kinds of animal life present in an area will be changed by more acid conditions. The whole ecosystem of the reef will be altered forever. Both heat and more acidity will cause this. Tests have been done with the national sea simulator which gives quite specific results. The Sea Sim is new technology. It is being given test runs at present. Acidification and heat together do not raise coral bleaching. This is a major finding. Scientists are now going down a new path. The new premise came from a combined research program using the Sea Sim and hands on tests off the coast of Papua New Guinea; so coral itself is relatively safe, but...

Climate change can cause changes in behavior. As water becomes warmer so some species of fish become aggressive. Some fish are inherently timid while others are bold. In experiments on fish from the Australian Barrier reef, when water was slowly warmed normally timid fish became aggressive. Their rate of activity increased as well. Evolution has created fish that fit into a niche where survival depends on a fish being very careful about its surroundings. If they openly attack larger fish it could mean the smaller ones will be eaten. It is possible that similar changes will occur with reptiles, amphibians, ectotherms and even mammals. If timid animals become bold then they could be killed off by predators or by humans using harvesting equipment trying to catch other animals for food. Only a very small increase in temperature led to the change. In the tests, fish were bred in captivity then released into holding tanks where the water was slowly warmed. They had no chance to socializ...