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Some elephants are evolving to have no tusks as a response to brutal poaching

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This image of a tranquilised tuskless female elephant in Mozambique’s Gorongosa National Park was taken while genetic samples were collected in 2018.

An elephant’s tusks are among its defining features — they help the animal lift heavy branches, topple trees, strip bark, fight, and dig holes for water and minerals.

But an increasing proportion of elephants in Mozambique’s Gorongosa National Park have been born without these crucial tools, and scientists say it is an evolutionary response to the brutal killing of elephants for their ivory tusks during the country’s 15-year civil war.

Elephant experts working in the park had begun to notice the phenomenon after the war ended in 1992. Field data and analysis of old video footage from the park found that the proportion of tuskless female elephants increased more than threefold between 1972 and the year 2000. It was a period during which the elephant population plummeted from roughly 2,000 to about 250 individuals, said Ryan Long, an associate professor of wildlife sciences at the University of Idaho.

“During the war, Gorongosa was essentially the geographic centre of the conflict,” Long said via email. “As a result there were large numbers of soldiers in the area and a lot of associated motivation… to kill elephants and sell the ivory to purchase arms and ammunition. The resulting level of poaching was very intense.”

Genetic signature

Scientists now have a better understanding of the genetic basis for this tusklessness and why it only appears to affect female elephants, according to a study that published in the journal Science on Thursday.

The analysis showed that tuskless females were over five times more likely to survive during the 28-year period than their tusked female counterparts, hence the adaptation was very unlikely to be a chance occurrence.

Tusklessness does occur naturally — and only in females — even in the absence of poaching, but usually only in a small minority of elephants. In Gorongosa in the 1970s, 18.5% of female elephants didn’t have tusks, while three decades later 51% did.

“Evolution is simply a change in heritable characteristics within a population over successive generations, and based on the results of our study, the shift toward tusklessness among female elephants at Gorongosa fits this definition perfectly,” said Long, an author of the study.

“The fact that it occurred so rapidly is rare indeed, and is a direct function of the strength of selection,” he said via email. “In other words, it happened so quickly because tuskless females had a MUCH higher probability of surviving the war, and thus a MUCH greater potential for passing their genes on to the next generation.

But what about the male elephants? After taking blood samples of 18 female elephants, with and without tusks, the researchers sequenced their genomes. They found that the females with no tusks had a genetic variation in a very specific region of the X-chromosome, which plays a role in tusk development.

“Females have 2 X chromosomes. In tuskless females, one of those chromosomes is ‘normal’ and the other contains the deleted information,” Long explained.

“When a tuskless female conceives a male offspring, that male has a 50/50 shot of receiving the affected X-chromosome from its mother. If it receives the ‘normal’ chromosome then it will survive and be born with the necessary genetic information to produce tusks.”

However, if the male elephant fetus receives the chromosome with the genetic variant, it dies in the womb because the variant that produces tusklessness females is lethal to males, Long said.



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Jailer who brought Ganemulle Sanjeewa to court granted bail

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Sanjeewa

Colombo High Court judge Manjula Thilakaratne yesterday granted bail to jailer Manoj Udayakantha who brought Sanjeewa Kumara Samararathne, also known as “Ganemulle Sanjeewa,” to Hulftsdorp Magistrate’s court number 05 on 19 Feb., when he (Sanjeewa) was shot dead by a gunman, disguised as a lawyer.

Manoj Udayakantha was taken into custody on 01 March.

Colombo High Court judge Manjula Thilakaratne ordered the suspect to be granted bail on two sureties of Rs. 2.5 million each and a cash bail of Rs. 75,000.

The jailer has been questioned regarding his failure to take any action against the individual who shot at “Ganemulle Sanjeewa,” as he stood in the dock, and fled. The gunman has been arrested but his female accomplice is still at large.

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SLTB resumes full service between Jaffna and Palaly

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SLTB on April 29 resumed services between Jaffna and Palaly after a lapse of 35 years. Although buses operated on some sections of the road, it hadn’t been fully opened until recently.

(pic by Dinasena Ratugamage)

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Radisson Blu Hotel, Galadari Colombo appoints Marko Janssen as General Manager

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As Galadari Colombo undergoes an exciting transformation and prepares to unveil its new identity as Radisson Blu Hotel, Galadari Colombo, Radisson Hotel Group is proud to announce the appointment of Marko Janssen as the hotel’s new General Manager.

With an impressive 35-year career spanning three continents, Janssen brings a wealth of international hospitality experience to this pivotal role, including over two decades of leadership as a General Manager since 2001. His deep-rooted passion for Food & Beverage, which continues to drive his pursuit of excellence and innovation, stems from his early background in F&B operations, the hotel said in a press release issued yesterday.

Janssen continues his tenure at Radisson Hotel Group, having previously served as General Manager at both Radisson Blu Hotel, Cebu in the Philippines and Radisson Blu Resort, Phu Quoc in Vietnam. His global leadership experience also includes senior roles at renowned properties such as Meliá Shanghai Hongqiao in China, Meliá Dubai in the UAE, Meliá Zanzibar in Tanzania, and TRYP Düsseldorf Krefeld in Germany.

A firm believer in the power of focus, consistency, and team empowerment, Janssen is passionate about developing talent and fostering a culture of high performance. He views great leadership as paving the way for others to succeed, inspiring his teams to aim higher and seize new opportunities.

Janssen’s appointment marks an exciting new chapter for Radisson Blu Hotel, Galadari Colombo as it prepares to deliver world-class hospitality under its new brand identity.

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