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Postmenopausal Killer Whales Become Pod Heads

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Post-menopausal Female Killer Whale

Recently, Killer Whales shed light on the benefits of unique reproductive procedure.

According to the study printed in the Journal Current Biology, post-menopausal female killer whales are extremely useful source of knowledge for the young ones. Hence, they enjoy leadership role in their pods after menopause.

Normally, female Killer whales give birth to calves till the age of 40. In comparison, their average life span is nearly 90 years

Female Killer Whales uses their decade long experience to direct young whales in every aspect of their life especially food.  In other words, they increase survival chances of their pods from their life experiences.

British researchers examined around 102 Killer Whales for this purpose. The main aim of the study is to find out the whether post menopausal whales work as leaders in group movements. They closely analyzed thousands of whales’ photographs in order to observe their movement pattern. Afterwards, they re-analyzed the previous study regarding the influence of menopausal mothers

Astonishingly, the outcome of the research reveals that females are expected to become leaders more than males. Leadership of old female Killer Whale is extremely beneficial for younger whales.

Earlier, people used to believe that life of a whale after menopause is useless. If a whale can longer reproduce offspring, then what is the purpose of their lives? However, the latest study reveals numerous advantages of post-menopausal Killer Whale.

Chimpanzees Adopt New Grunts to Communicate to New Neighbours

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moneky changes sound

A latest research reveals that monkeys that migrate from one region to another change their vocal calls according to their surroundings. They  adopt the newer call in order to communicate with new chimpanzees.

Researchers of University of New York observed a change in the vocal calls of chimpanzees that moved from Dutch zoo to Edinburgh. These animals were unable to produce an accent exactly similar to the Scottish brogue. However, they tried to alter their vocal calls in numerous ways.

Experts followed the chimps for a long time period of three years. The close analysis of their behavior demonstrates that these chimpanzees gradually adopted the sound and environment of new region. They learned the new sound after creating a strong bond with the local group.

Chimpanzees’ response towards food provides an evidence for the research.  Generally, mandrills make sound and vocalize whenever they eat foods.  In this case, the Edinburgh chimps developed a unique low pitched sound when they were offered apples.

Katie Slocombe, a psychologist of the University of New York discussed the entire report in detail. She informs that this is the first time when researchers witnessed such kind of behavior in chimpanzees.  They have not observed any specie that changes sounds according to the environment.

The report printed in the Journal Current Biology

Warblers Can Sense Storms and Tornadoes From Hundreds Miles Away

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storms

Apparently, birds can sense the storms and tornadoes through infrasound before it happens.

The wildlife biologists David Andersen along with the US Geological Survey and University of Minnesota carried out the research. The study shows that the birds flew away from few regions of the United States in order to protect it selves from storms.

The report printed in the Journal Current Biology was entirely based upon the golden winged warblers of US. Initially, researchers were trying to find out whether the golden winged birds can effortlessly carry a geolocater. Fortunately, the birds were able to bear the weight of a half gram geolocator. Experts attached the tracker on the wings of a flock of birds. Afterwards, the data gathered with the help of tracker reveals the exact migration pattern of these birds.

The outcome of the study unveils those 9 small birds left their homeland two days before the storm. These birds flew nearly 1,500 km in order to avoid the storm. It compels researchers to find out from where they get the alert of storms. Infrasound turns out as a kind of alert machine for these birds. It is impossible to listen to these sounds for ordinary human being. Generally, it occur frequencies below 20 hertz.

In April 2014, tornadoes killed around 35 people and destroyed whatever came in its way.

Henry Sterby, an ecologist of University of California informs that researchers already knew that birds could alter their routes between usual migrations. However, this is the first time when experts get a proper evidence to support the early assumptions.

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