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Climate Change is Shrinking Goats, Say Researchers

Climate Change is Shrinking Goats, Say Researchers

Alpine goats are shrinking due to climate change, researchers have claimed. Scientists from Durham University say that the goats now weigh 25 percent less than goats of a similar age thirty years ago, and blame the shrinkage on the region’s changing climate.

The researchers said the speed of the decline in the size of the goats has taken them by surprise, calling it “astonishing” and saying that the future of the species could be under threat.

The team used long-term records on the body weights of Chamois goats provided by hunters and compared them to changing temperatures in the region. They say that while the goats’ size has decreased, average temperatures have risen by three to four degrees centigrade.

However, while most studies linking shrinking animals to climate change have blamed the increasing scarcity of nutritional food, this study found no evidence that the Alpine meadows had declined in productivity. The team instead blame higher temperatures for changing how the goats behave.

Dr Stephen Willis of Durham University’s School of Biological and Biomedical Sciences said: “We know that Chamois cope with hot periods by resting more and spending less time searching for food, and this may be restricting their size more than the quality of the vegetation they eat.

“If climate change results in similar behavioural and body mass changes in domestic livestock, this could have impacts on agricultural productivity in coming decades.”

Dr Philip Stephens added that the declining body size of the goats could pose a problem in harsh winters, although as winters should be getting warmer under climate change, this may not be a problem.

“The body mass of juvenile animals is critical to their ability to survive harsh winters,” he said.

“However, whether that becomes a problem will depend on the balance of future climate change between the seasons.”

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