- Alcaraz breezes into third round of Shanghai Masters
- Gaza cultural heritage brought to light in Geneva
- 'Bullet for democracy': Trump returns to site of rally shooting
- Italy targets climate activists in 'anti-Gandhi' demo clampdown
- South Korean cult-horror series 'Hellbound' returns at BIFF
- Nepalis fear more floods as climate change melts glaciers
- Honduras arrests environmentalist's alleged murderer
- Padres pitcher Musgrove needs elbow surgery
- Supreme Court lets stand rules to curb mercury, methane emissions
- Boston beat Denver in NBA exhibition season opener, but Jokic says omens are good
- Chagos diaspora angry at lack of input on islands' fate
- Biden says 'not confident' of peaceful US election
- US trade chief defends tariff hikes when paired with investment
- Lukaku stars as Napoli beat Como to hold Serie A top spot
- Ohtani set for MLB playoff debut as Dodgers face Padres
- Pogba's drug ban cut to 18 months from four years
- Devine leads New Zealand to big win over India in Women's T20 World Cup
- Bosnia floods kill 16 people
- EU court blocks French ban on vegetable 'steak' labelling
- Prosecutors seek dismissal of rape charges against French rugby players
- Meta AI turns pictures into videos with sound
- Bolivia's Morales says claims he raped a minor are a 'lie'
- MLB Reds hire two-time champion Francona as manager
- Daniel Maldini receives first Italy call-up for Nations League
- US dockworkers return to ports after three-day strike
- Ancelotti points finger at Madrid's 'lack of intensity'
- Haiti reeling after 70 killed in gang attack
- Five Czech kids in hospital over TikTok 'piercing challenge'
- What happens next in Iran-Israel conflict?
- Country star Garth Brooks denies rape accusations
- Stubbs hits maiden century as South Africa make 343-4 against Ireland
- DR Congo to begin mpox vaccination campaign Saturday in east
- Odegaard injury has forced Arsenal to be 'different', says Arteta
- Ratcliffe refuses to guarantee Ten Hag's Man Utd future
- Meta must limit data use for targeted ads: EU court
- Mauritius to hold legislative election on November 10
- Britain qualify for America's Cup final after 60-year wait
- IMF asks Sri Lanka to protect hard-won gains
- Morata returns to Spain Nations League squad after injury
- Irish regulator to probe Ryanair use of facial recognition
- Public allowed to see video evidence in France mass rape trial
- US hiring soars past expectations in sign of resilient market
- Under-fire Ten Hag 'together' with Man Utd hierarchy
- Guardiola talks of Man City love affair as financial hearing rumbles on
- De Bruyne out of Belgium Nations League squad
- Japanese trainer Yahagi hopes Shin Emperor achieves 50-year-old Arc dream
- UK's Starmer hails 'landmark' carbon capture funding
- As EU targets Chinese cars, European rivals sputter
- Bosnia floods kill 14 people
- Tennis world number one Swiatek splits with coach Wiktorowski
Whale of a tail: Scientists track unique humpback 'fingerprint'
In Antarctica, a scientist waits patiently for two frolicking humpback whales to poke their tails out of the icy waters so she can take a photographic "fingerprint" of the unique colors and patterns that allow researchers to identify individuals of the species.
Andrea Bonilla, a Colombian scientist at Cornell University in the United States, has been working with a team of researchers since 2014 to catalog humpback whales from a visual analysis of their tails -- or flukes.
"What we are doing is tracking the history of each individual," Bonilla told AFP onboard the ARC Simon Bolivar during a scientific expedition by the Colombian navy.
Over the years, the team has identified 70 whales, and hopes to see some of them again to record any physical changes that could provide clues to their migratory patterns, population sizes, health and sexual maturity.
On the tail, "the coloration and patterns that each whale has is unique, it is like a fingerprint, so what we do is look at the different marks they have, the different scars" to identify an individual, said Bonilla.
Global populations of humpbacks have bounced back after once being decimated by commercial whaling, but the ocean giants remain under threat from vessel strikes, illegal fishing, pollution and underwater noise.
Today there are about 84,000 adult specimens in the world, according to the International Union for Conservation of Nature.
The importance of tail identification was highlighted in a study published last month in the Royal Society Open Science journal which showed the number of humpback whales in the North Pacific had plummeted 20 percent in less than a decade.
Tracking some 33,000 whales through photos of their flukes, scientists noted the steep decline which they speculate was due to starvation because of marine heat waves.
- 'Accumulating energy' -
Photo identification is common in the study of marine mammals, although the use of fluke identification is most used with humpbacks both because of their unique markings, and their habit of raising their tails out off the water while diving.
Different populations of humpback whales live across the world's oceans, carrying out mammoth migrations from warmer breeding spots to feeding grounds in polar waters.
"They take advantage of this great biomass of food that is here (in Antarctica) and for several months they are simply accumulating energy," said Bonilla.
Using photographs, the scientist draws reproductions of the details of the tails of the enormous marine mammals, which can reach up to 18 meters (59 feet) long and weigh about 40 tons.
On a computer, she zooms in on the details of the flukes, which can reveal attacks from other animals, "if there is some type of skin disease" or information about their diet.
The inventory allows scientists to track the movement of specific whales, which is crucial for conservation initiatives.
"If a whale always comes to the same area to reproduce, it is important to protect those areas. If they cease to exist or are disturbed, that whale will have nowhere to go," warned Bonilla.
H.Silva--PC