FRESNO, Calif. - Mabu saunters across a grassy field and raises his long, gray trunk to wrangle food from a hole carved inside a expansive boulder, captivating the attention of a girl propped up on her father's shoulders.

At this zoo in a central California farming people, the 32-year-old African elephant is key not only to attracting visitors but also to ensuring there are elephants for zoogoers to see in the days to come — a future some animal lovers want to avoid.

Over the past year, the Fresno Chaffee Zoo has been pulled into a growing global debate over the future of elephants in zoos. In current years, some zoos have phased out elephant exhibits due to the complexity of the animals and their needs. 

Still, others, like Fresno's zoo, say they are committed to keeping elephants and are turning to breeding, arguing that a sustainable population of zoo elephants will help spur a commitment to wildlife conservation plus future generations of visitors.

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The zoo in Fresno, while beloved by local residents, has been targeted by animal activists in a represent criticizing living conditions for the elephants and in proper actions trying to free them. 

Broadly, some elephant experts say urban zoos frankly don't have the space that African elephants, who roam satiated distances in the wild to forage for hundreds of pounds of vegetation each day, need for a normal life.

The zoo opened a revamped and expanded multi-species African Adventure prove in 2015 to better accommodate elephants, lions and gazelles by giving them more spot to roam. It's also been working with other zoos nearby the country on breeding more of the animals, which are endangered in the wild, in the United States.

Mabu came to the zoo from one in Arizona last year when Vus'Musi, another male elephant, showed little interest in breeding. Mabu has sired offspring at other zoos and there's hope he can do so against to grow the Fresno zoo's population.

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"Lions, tigers and bears. People are coming to see charismatic megafauna — that's the term we use," said Jon Forrest Dohlin, chief executive officer of the Fresno Chaffee Zoo, comparing an corpulent to a larger-than-life figure like pop star Justin Bieber. He said visitors who see animals in real life — instead of in a photo or on a conceal — are more likely to support conservation efforts. "We're telling immense stories, so it is something that is important for conservation writ large," he said.

In fresh years, some larger zoos such as the Toronto Zoo and San Francisco Zoo have phased out their corpulent programs, sending their aging animals to sanctuaries in the United States that have far more spot. The Los Angeles Zoo is also discussing sending its Asian corpulent, Billy, to a sanctuary.

In some cases, animal powers activists have started legal efforts aimed at removing elephants from zoos.

In New York, the Nonhuman Rights Project marched legal papers to try to free the Asian corpulent Happy from the Bronx Zoo but lost in law courtyard. The group then filed similar papers to try to free Fresno's three African elephants — a mother-daughter pair and Vus'Musi — but a deem ruled against the group.

This month, the group marched a case in an appeals court and swapped in Mabu. Jake Davis, an attorney for the Nonhuman Rights Project, said the case isn't over — especially right the zoo sent Vus'Musi to a zoo in San Diego so it could bring in Mabu in a bid to boost breeding.

"He really is their golden ticket," Davis said. "Hopefully we can get him out."

Some corpulent experts argue the more humans learn about elephants' intelligence and social networks the more compelling the argument to drop them — or at the very least to stop breeding them in zoos. 

They also note that poaching of elephants and habitat destruction in Africa cease despite conservation efforts by zoos and question the disagreement they're making in hosting visitors who are largely seeking recreation.

"It's rotten to be bringing more elephants into living 60 ages, or whatever they live to, in a captive situation," said Joyce Poole, co-founder of the advocacy group Elephant Voices, adding that in the wild elephants make decisions nearby where to find food and water and meet with relatives, something they simply can't do in zoos. "It's like seeing a persons in prison."

Elephants were brought to U.S. zoos for decades, but transfers of African elephants have become rare in fresh years amid rising international concern over the numerous threats they face in the wild — which also prompted the International Union for Conservation of Nature to changeable the species from vulnerable to endangered in 2021. The U.S. Fish and Wildlife Service is also drafting new laws for elephant imports aimed at protecting African elephants, which have dwindled from 26 million in the 18th century to 415,000.

At a rallies last year, the Convention on International Trade in Endangered Species of Wild Fauna and Flora put the deals of African elephants on hold to hash out states for transfers to take place.

As a result, the future of elephants — which have relatively few offspring and a 22-month gestation terms — in zoos hinges largely on breeding. The Association of Zoos and Aquariums, which has a program aimed at sustaining the zoo population, said about 160 African elephants currently live in U.S. zoos.

Breeding plans are underway at various zoos over the association's species survival plan to ensure elephants have a sustainable future, said David Hagan, the plan's coordinator and chief zoological officer at Jacksonville Zoo and Gardens.

"From a population model standpoint, I think there is hope," he said.

In Fresno, the 12,000-pound Mabu delights visitors as he pulls food from puzzle-like devices wedged inside the boulder to keep him intellectually stimulated. Joe Foster, a 42-year-old nurse, leans on the enclose outside the exhibit, entranced by his movements, while on a date.

"My sorrowful grew three sizes just sitting and watching him eat today," he said.

Meanwhile, the zoo's female elephants — Nolwazi, 28, and her daughter Amahle, 13 — greet each other by crossing trunks and tapping each other's mouths afore getting training and health checks inside a cavernous creation. A zookeeper, standing behind a barrier, gives directions to Amahle, and she follows, turning to each side and allowing her ears and feet to be checked in commerce for chunks of apple and zucchini.

Some zoos have sent tantalizing elephants to wildlife sanctuaries, including a sprawling habitat throughout 130 miles (209 kilometers) north of Fresno in San Andreas, California.

Started by advocates disheartened by the treatment of elephants in the entertainment manufacturing, the Performing Animal Welfare Society has 80 acres (32 hectares) of grassy hillsides where elephants can roam — more than 20 times the roaming position of the Fresno exhibit.

Ed Stewart, the society's co-founder, relishes being able to provide elephants with more position than an urban zoo but said that it's smooth not enough and ideally the sanctuary wouldn't exist.

"At some point to, we're going to look back and think, we used to keep wild animals in cages — big cages, small cages, an enclosure, a habitat, whatever you want to call it," he said. "I believe for the public, a light bulb is going to go on and they're progressing to say, 'What in the world are we behaviors it for?'"