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Showing posts with label reptiles. Show all posts
Showing posts with label reptiles. Show all posts
Climate Change Could Make Timid Animals More Aggressive
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 socialize with wild fish. When the water was cool the fish hid in plastic pipe. As the water heated up the fish ventured further from the protective pipe.
Certain assumptions can be made from this research. As the Arctic ice disappears, Polar bears wandering near small towns in Alaska, Canada and Northern Europe could become more brazen in their search for food from garbage cans and dump sites. They could kill humans more frequently in their anger. Similarly, rats living in these cold climes may not just die of shock when hit. They could turn on people and fight back.
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 socialize with wild fish. When the water was cool the fish hid in plastic pipe. As the water heated up the fish ventured further from the protective pipe.
Certain assumptions can be made from this research. As the Arctic ice disappears, Polar bears wandering near small towns in Alaska, Canada and Northern Europe could become more brazen in their search for food from garbage cans and dump sites. They could kill humans more frequently in their anger. Similarly, rats living in these cold climes may not just die of shock when hit. They could turn on people and fight back.
Conservation
New Finds of Early Humans Do Not Change the Basic Theory
Darwin got it right. Well actually he may not have. Fossils of early humans do not alter basic scientific thought in relation to evolution, Finds do not show a linear development toward advanced Man. Evolution though does tend to predict what new discoveries show. Claims that a particular fossil find is a breakthrough are just not true.
New dinosaur fossils, however, tend to be groundbreaking with regular identification of new type of dinosaurs. Indeed, they seem to have roamed on every continent. The whole book on dinosaur evolution has not yet been written. Time will tell how clear an understanding of it we can get. It seems evolution of dinosaurs is clearer than that of humans.
New research teams need to be formed to go to all parts of the world and seek answers to evolution of mammals and reptiles, if indeed dinosaurs were reptiles. Some specialists today even question this view.
New dinosaur fossils, however, tend to be groundbreaking with regular identification of new type of dinosaurs. Indeed, they seem to have roamed on every continent. The whole book on dinosaur evolution has not yet been written. Time will tell how clear an understanding of it we can get. It seems evolution of dinosaurs is clearer than that of humans.
New research teams need to be formed to go to all parts of the world and seek answers to evolution of mammals and reptiles, if indeed dinosaurs were reptiles. Some specialists today even question this view.
Conservation
Reserves Are Not Working: Extinctions Continue
Australia's slaughter of wildlife continues despite warnings from CSIRO. Nearly half of Australian mammals will end their existence very soon. Zoologist Fred Ford said 11 extinctions have occurred in recent years in the south-eastern forests of Australia. The reserve system is not working. They are just for show. Plants are doing well because they are surviving outside and inside reserves. Nothing is being done to protect small native mammals.
Reserves are havens for introduced feral animals and invasive weeds. Rangers are not being trained to look after the endangered species. Money should be allocated more efficiently. With all the money put into reserves there must be more positive outcomes.
Reserves are havens for introduced feral animals and invasive weeds. Rangers are not being trained to look after the endangered species. Money should be allocated more efficiently. With all the money put into reserves there must be more positive outcomes.
Native animal need to be researched and the data must be analyzed. Records should be kept to formulate action. An astounding 65 per cent of reptiles in Australia have been discovered in the last 35 years. The public has not been adequately informed of this.
Conservation
Reptiles Are at Greater Risk of Extinction
Though there are worries over extinction of all animals, it is reptiles who are in most danger. Some reptiles are pretty, but for the most part they are seen as ugly. Because of this they lose out on conservation funding. This is serious with one in five reptile species predicted to die out.
People are moving into previously pristine regions of the tropics to log valuable trees and to practice logging. The conclusion about endangered reptiles has been reached by 200 of the world's scientific experts. Funding is not enough. We need to change human behavior. This of course means changing human needs, which is more challenging.
Concentrating on saving turtles is good for them. Other reptiles, however, remain at risk. The living and reproductive systems of many reptiles is still unknown. Out of sight, out of mind leads to extinction. Reptiles tend to live in the toughest of environments. Such specialization does result in their demise when humans change the habitat.
Those who should know better have forgotten about reptile extinction. Threatened species are logged in the IUCN Red List. Only a third of endangered reptiles are on the list. In depth recording of reptiles tends to be regional and is not collated worldwide.
Conservation
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