无码少妇一区二区三区免费,妓院一钑片免看黄大片,国语自产视频在线,亚洲AV成人无码国产一区二区,激情久久综合精品久久人妻,日韩免费毛片,综合成人亚洲网友偷自拍,国内自拍视频在线观看,欧美熟妇性xxxx交潮喷,国产成人精品一区二免费网站

Aussie animals better at recognizing alien predators than previously thought: study

Source: Xinhua| 2018-08-22 10:58:33|Editor: mym
Video PlayerClose

SYDNEY, Aug. 22 (Xinhua) -- Australian native mammals are able to recognize introduced predators as a danger, new research has shown.

Scientists at Sydney University (SU), released a meta-analysis study on Wednesday, which attempts to explain why local fauna face such an extreme threat from feral predators such as foxes, cats and dogs.

"We're looking at the idea whether or not Australian Mammals are naive, or essentially fearless towards these introduced predators," study author Dr. Peter Banks told Xinhua.

"We've got the world's worst extinction record with 29 species of mammals going from the mainland of Australia, and these introduced species are largely to blame."

In some parts of the world, native species of animal are unable to recognize danger posed by a non-native predator and will fail to preserve themselves by running away or hiding.

"The dodo, went extinct when humans came onto the island and the dodos just didn't recognize them and humans were able to just club them to death," Banks said.

"Likewise on islands in the Atlantic, mice eat albatross alive because the albatross just don't know what to do about them."

However, research shows that all of Australia's native mammals that were tested were able to recognize foxes, cats and dogs as a threat and consistently change their behavior.

To achieve this result, Banks' research looked at 94 different previous studies to establish an overall picture of animal reactions to predators.

"Some of the studies were things like wallabies in enclosed areas and they would wheel out a stuffed cat to see whether the animals would respond," Banks said.

"Other ones were small mammals like rats or bandicoots out in the wild and they would put out fox odour, or cat odour or play the calls of dogs."

Surprisingly to experts, the animals showed fear responses such as stress, heightened awareness or eating less when faced with these predatory cues.

This may be explained by the fact that species which didn't have these instinctive responses have gone extinct, said Banks.

"The ones that were left behind were somehow preadapted or otherwise worked out, either through learning or through evolution to recognize these predators as dangerous."

The problem remains, however, even after a threat is recognized, can the vulnerable local wildlife act fast or smart enough to save themselves, and their species.

TOP STORIES
EDITOR’S CHOICE
MOST VIEWED
EXPLORE XINHUANET
010020070750000000000000011100001374096601
无码一区二区三区不卡AV| 天天看片视频免费观看| 中文在线а√天堂| 日韩一区二区三区一级片| 丰满熟妇乱又伦精品| 亚洲人免费视频| 在线观看无码一区二区台湾| 中文乱码字幕在线中文乱码| 性动态图无遮挡试看30秒| 欧美成人一区二区三区不卡| 激情五月开心婷婷深爱| 五月婷婷综合一区二区三区| 婷婷伊人久久大香线蕉av| 深夜在线观看免费av| 乱人伦人妻系列| 狠狠色噜噜狠狠狠狠2021| 喷潮出白浆视频在线观看| 国产欧美VA天堂在线观看视频| 欧美熟妇另类久久久久久多毛| 欧美 在线 成 人怡红院| 欧美日韩区1区2区3区| 国模视频一区| 亚洲欧美日韩综合一区在线 | 国产亚洲精品久久yy50| 少妇撒尿一区二区在线视频| 国产盗摄老熟女视频一区二区三区| 欧美日韩不卡高清在线看| 中文字幕乱码亚洲无线精品一区 | 精品国产成人a区在线观看 | 女人高潮被爽到呻吟在线观看| 任我爽精品视频在线播放| 亚洲国产精品国自产拍av在线| 2020亚洲欧美日韩在线观看| 欧美人与动牲交免费观看网| 久久伊人精品青青草原APP| 一区二区在线中文字幕| 国产超碰无码最新上传| 天堂网亚洲综合在线| 国产午夜男女爽爽爽爽爽| 少女视频在线观看完整版中文 | 日本韩国一区二区精品|