Hugo and Lolita at the Miami Seaquarium in the early 1970s. Photo by my mother
In my last article, I explained a few of the issues with keeping orcas in captivity. Today I want to share the sad stories of two orcas held for decades at the Miami Seaquarium.
“It’s inherently hypocritical to keep a large-brained, gregarious, sonic animal in a concrete box. It needs to end.“-Ric O’Barry1
Postcard, Hugo, the Killer Whale, performing at Miami Seaquarium, circa 1968. From Florida Memory of the State Library and Archives of Florida, public domain.[efn_note]Postcard, Florida Memory, State Library and Archives of Florida, accessed January 29, 2021.[/efn_note]
Hugo, Miami Seaquarium
In 1968, whale herders captured Hugo at approximately age 3 near Puget Sound, Washington. The Miami Seaquarium purchased him but did not have an orca tank. He lived in an even smaller tank, the present-day manatee tank, for the first 2 years.
Small Tank
Ric O’Barry, founder of the Dolphin Project, worked at the Miami Seaquairum when they purchased Hugo. O’Barry objected to the tank’s tiny size. “When [Seaquarium manager Burton Clark] showed me Hugo, I shook my head in disbelief…’He’s longer than the tank is deep,'” he said. Hugo was thirteen feet long and the tank was only 12 feet deep. “He’s just a baby. He’ll grow twice this big. Leave him in here, Mr. Clark, and you’ll have the Humane Society down on your ears.” Clark said they were building a new tank and showed O’Barry the site. “I looked at it in dismay. ‘This is it?'”2 The current tank was completed in 1970. It is the one the park still uses today and is the smallest orca tank in use in the world.
Clark asked O’Barry to take care of Hugo and ‘keep him happy’ while the new tank was under construction. So O’Barry became Hugo’s caretaker, and though he was warned that killer whales were dangerous, O’Barry found that Hugo was a sensitive, intelligent creature and wasn’t scared of him. “‘Hugo!’ I said with a grin. ‘You’re nothing but a big, wonderful dolphin!” Hugo and O’Barry came to trust each other. “He allowed me to ride on his great back and, to amuse the tourists, I rode around on his back playing flute and guitar. Hugo loved music.”3
But O’Barry, wanting to protect Hugo and learn about orcas, struggled with the situation. “Hugo was eating 100 pounds of fish a day, and the bigger he got, the smaller his little whale bowl seemed. Nobody was more conscious of this than I, but every tourist who came through, thousands of them every day, pointed it out to me as if it were a great discovery.” The new tank construction had constant delays and slow progress. Even once completed, you can see how small it is since they haven’t expanded it. He was questioned by tourists about Hugo’s situation, and O’Barry in turn questioned his supervisors about it. But they were dismissive and nothing changed. “I left, this time for good,” O’Barry wrote about leaving the Miami Seaquarium.
“The [Miami] Seaquarium had sought to capitalize on Hugo by splashing an artist’s conception of him on billboards along the highway leading south: Hugo the killer whale thrashing through the frothy water, with an angry countenance and huge, bloody teeth.” – Ric O’Barry4
Hugo Suffered in Captivity
Hugo repeatedly injured himself while in captivity. At one point he severed the tip of his rostrum and a veterinarian had to sew it back on. According to a newspaper article at the time of the incident, “His powerful drive shattered the acrylic plastic bubble, and knocked a five-inch hole in it. And a piece of jagged plastic severed Hugo’s nose.”5 The same article speculated that an incident like this might happen again. And it did. Hugo rammed his head into the tank multiple times throughout his twelve years in captivity.
In 1980, Hugo died from a cerebral aneurysm, likely from the trauma he suffered from his self-mutilating behavior.6 Many refer to Hugo’s death as a suicide. The Miami Seaquarium lifted his body from the tank and put it in the Miami-Dade landfill.7 They did not memorialize his life or death in any way, “it was as if he had never existed.”8 Even today, this is the only mention of him on their website: “Miami Seaquarium welcomes the arrival of Hugo, it’s First Killer Whale to the park. The whale is named after Hugo Vihlen, the man who sailed across the Atlantic Ocean in a six-foot sailboat.”9Â
Hugo and Lolita at the Miami Seaquarium around April of 1977. Photo found and digitized by Thomas Hawk on Flickr, Creative Commons license (CC BY-NC 2.0)
Lolita, Miami Seaquarium
While Hugo’s story is sad, Lolita’s story is even more sorrowful. She is a 7,000-pound orca and is 22 feet long but lives in the smallest and shallowest tank of any orca in North America. The tank is 80 feet long, 35 feet wide, and 20 feet deep. She can’t dive because she is as long as the tank is deep. For comparison, an Olympic-sized swimming pool is 164 feet in length and 82 feet wide. The tank violates the law, as the Animal and Plant Health Inspection Service (APHIS), operating under the United States Department of Agriculture (USDA), requires a minimum of 48 feet wide in either direction with a straight line of travel across the middle. But they do not have the authority to require an expansion. Worse, the local jurisdiction opposes the expansion of the Seaquarium on the small island. Drone footage shows just how small the pool she lives in is compared to her body:
“The orca Lolita’s tank at the Miami Seaquarium may be the smallest for thisspecies in the world—she is longer than half the width of the main tank.”10
But the size of her tank isn’t even the worst part.
Lolita lives alone.
Recall that orcas are highly social animals that usually live together for life in multigenerational family groups. Since Hugo’s death in 1980, she’s lived alone. Sometimes two or three Pacific white-sided dolphins live with her, but reports show that they rake and harass her.11 Can you imagine living alone except for two other species that only sometimes interacted with you?
After Hugo’s death, the Miami Seaquarium required Lolita to continue performing without her companion. In fact, they had her doing her regular performances the very next day. Her former trainer told a reporter at the time: “We expected problems when Hugo died, but Lolita performed as usual the next day…Once in a while she would look for him, but she got over it.”12 We now know that orcas grieve as humans do, so it is difficult to understand this today.
Lolita has always struggled in captivity. A former Seaquarium employee recalled Lolita’s early days at the Miami Seaquarium: “The skin on her back cracked and bled from the sun and wind exposure,” she said.  “She wouldn’t eat the diet of frozen herring. … At night, she cried.”13 Today, she often floats very still and appears despondent. She cannot get enough physical activity, hasn’t seen another orca in over 40 years, and likely suffers emotionally.Â
“Even the Seaquariums’ public-relations director admits that the show won’t tell kids where Lolita comes from, what life for orcas is like in the wild, what threats face her native L pod…But then, these are the kinds of facts that prompt children to ask uncomfortable questions like, ‘Why isn’t Lolita with her family, Mommy?'”14
Lolita at the Miami Seaquarium, image by Marita Rickman from Pixabay
Capture & Relation to Hugo
In August 1970, four-year-old Lolita (originally named Tokitae) was one of six juvenile orcas captured from the waters off Washington state. “By 1987, Lolita was the only survivor out of an estimated fifty-eight killer whales taken captive from Puget Sound or killed during captures.”15 The captures were often violent and whale herders used speedboats, an airplane, and explosives in the water to herd the orcas into a small area. “The juvenile orcas were separated from their mothers, as the infants were prime candidates to be sold to aquariums, while the adult orcas were released and free to leave. However, the adult pod would not leave their offspring and refused to swim free, vocalizing human-like cries, until the last baby was pulled out of the water, never to return again.”16 Another account described it this way: “During those weeks between capture and transport, the adult orcas never left the abduction site, and the sound of their grief-filled keening rang through the cove.”17 One adult and four young orcas were killed during Lolita’s capture.
Though caught in separate years, it turns out that Hugo and Lolita were related. “Unbeknownst to the staff and owner of Miami Seaquarium, Hugo and Lolita both were captured from the Southern Resident Killer Whale population, and shared similar dialects with one another, allowing them to communicate.”18 So while this was an accidental good pairing for companionship, Hugo and Lolita only had each other and mated. Lolita was pregnant several times but did not birth any live babies. She may have miscarried due to inbreeding. This does not seem to happen in wild orca populations.
“For the Seaquarium, Lolita represents a star money-making attraction, a possession so prized that officials maintain their grip on her despite years of protests by activists and animal experts who cite evidence that her living situation is legally and ethically unacceptable.” -The Whale Sanctuary Project19
Trainer “surfing” an orca, either Hugo or Lolita, at the Miami Seaquarium in the early 1970s. Photo by my mother
Time for Lolita’s Retirement
There are many organizations working on Lolita’s behalf to free her, including the Orca Network, the Center for Whale Research, Ric O’Barry’s Dolphin Project, the Empty The Tanks organization, the Salish Sea Marine Sanctuary organization, and The Whale Sanctuary Project. Ken Balcomb, marine biologist and founder of the Center for Whale Research, even offered to purchase her outright from the Miami Seaquarium in 1992. He had a plan to retire her to a sea pen in San Juan Island, Washington.20 But they refused to even discuss the sale of Lolita with Ken Balcomb’s group.
These movements began in the 1990s and have escalated since Southern Resident orcas were placed on the Endangered Species List in 2005. These organizations have had multiple campaigns, detailed retirement plans, lawsuits, and appeals filed on Lolita’s behalf. The best thing for this orca is to allow her to retire to an ocean sanctuary.
Florida. – Division of Tourism. View showing an animal trainer performing with an Orca whale at the Miami Seaquarium attraction. 20th century. State Archives of Florida, Florida Memory. <https://www.floridamemory.com/items/show/93509>, accessed 6 May 2021.
But the Miami Seaquarium has no such plans. In 2019, their general manager, Eric Eimstad, wrote to The Seattle Times: “There is no room for debate on what is best for Lolita … For almost 5 decades we have provided and cared for Lolita, and we will not allow her life to be treated as an experiment. We will not jeopardize her health by considering any move from her home here in Miami.”21 The argument against her retirement is that she will not survive in the wild.
However, biologists would not drop Lolita in the ocean and leave her to fend for herself. They would move her to a sanctuary where she could learn to swim great lengths and depths again, catch food, and socialize. They would monitor her and provide veterinary care. The hope would be that she could go back to the open ocean someday. Her pod, known as the L pod, is still active and in fact, orca biologists have even figured out who her motherly most likely is – L25 – and she’s still alive! Named Ocean Sun, she’s approximately age 90 now, and L25’s pod still lives in the same area of Lolita’s capture. Wouldn’t it be wonderful if we could reunite them someday?
#50YearsOfStolenFreedom #Retire Lolita
“When I heard the Lolita story, I imagined how amazing it’d be to bring her back to her mother decades after her capture…This singlular, feasible event could catapult us into such a dignified direction. We owe this species big time. And we could start with her.” -Gabriela Cowperthwaite, Blackfish director22
Hurricane Irma
During Hurricane Irma in 2017, when the storm was on track for Miami, the Seaquarium did not evacuate her – they left her there! That storm turned and went to Tampa instead, but she would have likely died if Irma had hit Miami directly. As Dr. Jeffrey Ventre, a former SeaWorld trainer, noted, “In the context of the original storm forecast, which predicted a CAT 4 or 5 direct strike on Miami, the Seaquarium’s decision to roll the dice with her life is certainly callous, immoral, and unjust.”23
The City of Miami declared that anyone who abandoned their pets during the storm could be charged with animal cruelty. But this did not include the Miami Seaquarium, and Lolita could have been injured or killed. “The threats to exposed captive killer whales include missile injuries, blunt force trauma, stress, and foreign objects in the pool, which can be swallowed. In nature the whales can ride out storms, spending their time predominantly below the surface and at greater depths,” said Dr. Jeffrey Ventre. Another former SeaWorld trainer and advocate of orcas, Samantha Berg, pointed out that Lolita’s “tank is not deep enough for her to submerge and find refuge from flying debris.”24 Further, debris can be toxic to the orca. And if caretakers evacuate, Lolita doesn’t have anyone to feed her.
According to the Case Against Marine Mammal Captivity, facilities frequently do not evacuate animals in advance of storms.25 In fact, in 1992, Hurricane Andrew flooded the Miami Seaquarium and six of their sea lions were electrocuted.26Â So is this a larger problem that we should not ignore? It is not unreasonable to believe that any zoo, aquarium, or park that is responsible for other beings should protect them at all costs.
“If [the Seaquarium] has no plan or protocol during a storm other than leaving her behind, then Lolita shouldn’t live there,” O’Barry says. “It’s a death sentence.” -Ric O’Barry27
Why is Lolita still living in captivity?
Many people consider Lolita to be the prime candidate for removal from captivity. After Hurricane Irma, the Miami Beach City Commission “voted unanimously on a resolution urging the Seaquarium to release her. The proposal is only symbolic because the Seaquarium is located on Virginia Key, not under the jurisdiction of Miami Beach. But Miami Beach officials are asking the park to retire Lolita into the care of the Orca Network, a nonprofit based in Freeland, Washington, which has had plans for how to retire the creature since 1995.” The Seaquarium argued against the vote and insisted Lolita was safer at the marine park than she would have been in a sea enclosure.28
Lolita at the Miami Seaquarium, image by FrodeCJ from Pixabay
“It is Lolita, more than any other captive orca, who offers the potential to answer the big question that hovered around the Blackfish debate: Why not return wild-born orcas to their native waters and pods?” -David Neiwert29
As mentioned above, there are many organizations advocating for Lolita’s release. Several organizations propose moving her to a sea pen with human care since she likely cannot live without human care at this point. There’s also the Whale Sanctuary Project which is currently building an ocean sanctuary for former captive whales. I’ve listed links to all of these below if you want to learn more or support these projects. Please see my Update on Lolita/Tokitae article.
The best thing you can do, though, is to not visit marine theme parks that hold captive whales or other marine mammals that require the animals to perform for entertainment. I’ve only shared two stories about captive orcas in this post, and I’ll share a few others in my next post. Thank you for reading, and please subscribe!
Additional Resources:
Film, Lolita: Slave to Entertainment
Website, Lolita, The Orca Network, accessed February 4, 2021.
Website, The Whale Sanctuary Project, accessed February 4, 2021.
Film, A Day in the Life of Lolita, the Performing Orca:
Website, Action for Lolita, Ric O’Barry’s Dolphin Project, accessed February 4, 2021.
Book, “Of Orcas and Men: What Killer Whales Can Teach Us,” by David Neiwert, The Overlook Press, New York, 2015.
Article, “Photo Illustrates the Lesson We Should Have Learned About Orca Captivity in the 1980s,” One Green Planet, accessed February 4, 2021.
Website, Action for Lolita, Empty The Tanks, accessed February 4, 2021.
Article, “What Happens to Them Happens to Us,” Hakai Magazine, May 12, 2020.
Website, Save Lolita Organization, accessed February 4, 2021.
Film, “Window of the Living Sea,” Florida Memory State Library and Archives of Florida, 1970. Original film from the Miami Seaquarium, features Hugo and Lolita together in brief sections.
Orca performance at SeaWorld Orlando. Photo by Jo-Anne McArthur / We Animals (https://weanimalsmedia.org/)
As I mentioned in my first article in this series, I grew up loving animals and held a deep respect for zoos and aquariums. My parents took me to our local zoo often as a child. I loved seeing and learning about the vast array of species on our planet. They also took me to Disney World and several other parks in Orlando, but we never made it to SeaWorld. I’ve always wanted to go, and when I became a mother, I mentally added it to the list of places I’d like to take my son. I thought it would be truly awesome to experience.
But marine and ocean-themed amusement parks are often different from zoos and aquariums in that they do not provide anything close to a species’ habitat or natural environment. Established for entertainment purposes first and foremost, they are more amusement parks than aquariums. After learning all that I’ve learned this year, I simply cannot support SeaWorld and similar parks across the world. The lives they live in captivity are analogous to the circus, and I have never supported circuses.
I am choosing to not buy a ticket.
I want to share the resources with you that led me to this decision. But first, let me address SeaWorld and marine parks in general.
“Marine parks differ from zoos in that the animals – whales, dolphins and seals – are performers. This, say critics, puts them squarely in the circus tradition.”-Erich Hoyt3
SeaWorld San Diego, photo by NeONBRAND on Unsplash
SeaWorld as the Representative
Though a very successful business, SeaWorld has always had controversial beliefs and practices. Thad Lacinak, Vice President and Corporate Curator of Animal Training of SeaWorld Orlando from 1973-2008, said in 1989: “You get the so-called environmentalists who say they don’t think the whales like it here, but what proof do they have? Everything we see indicates to me that they don’t sit out in the pool thinking about being out in the ocean– because of the way that they seem to enjoy what we do.”4 I’m not convinced that orcas swimming in a pool with concrete walls and no other species, plant life, or ocean activity taking place is all that interesting compared to the open ocean. But the lack of empathy in that statement is what is most bothersome.
While the issues of captivity occur in all marine parks holding captive marine mammals, SeaWorld is the epitome. The documentary, A Fall from Freedom, called SeaWorld the “largest, wealthiest, and most politically powerful of all marine parks.”
At least 172 orcas have died in captivity, not including 30 miscarried or still-born calves. 92% of SeaWorld’s orcas did not survive past the age of 25 years. -Whale and Dolphin Conservation17
Blackfish
After watching Blackfish, I was intrigued not only by the controversy of captivity but also by the relationships trainers developed with orcas. This film, the most well-known documentary about this subject, told of the dozens of killer whale incidents at SeaWorld, including several deaths. The producers interviewed many former SeaWorld trainers and all shared similar stories. Management routinely omitted information about incidents and provided misinformation about orcas. The work environment elicited a consistent fear of being transferred away from orca work or being let go altogether. The film interviewed marine biologists who have studied wild orcas and found SeaWorld’s “educational” materials offensively inaccurate.
The film highlighted that orcas in captivity behave differently than wild orcas because captivity is traumatizing to them. It brought the issue of keeping them in captivity into the public’s view. This argument had been going on for years between different agencies, scientists, and marine biologists. “Outrage over the film metastasized quickly into calls to prohibit keeping killer whales in captivity,” wrote Michael J. de la Merced in the New York Times.20 The debate continues today but the changes are happening, albeit slowly.
The Killer in the Pool
An article entitled “The Killer in the Pool” written by Tim Zimmerman inspired director and producer Gabriela Cowperthwaite to begin researching Tilikum’s story. The article, written shortly after Dawn Brancheau’s death, detailed the history of orca capture and captivity, as well as marine park practices, trainer injuries, and deaths.22 Cowperthwaite said, “For two years we were bombarded with terrifying facts, autopsy reports, sobbing interviewees and unhappy animals – a place diametrically opposite to its carefully refined image. But as I moved forward, I knew that we had a chance to fix some things that had come unraveled along the way. And that all I had to do was tell the truth.”24 She’s also said in an interview featured in the film Long Gone Wild that she used to take her kids to SeaWorld and now will never buy a ticket again and hopes others will not either.
“If you pen killer whales in a small steel tank, you are imposing an extreme level of sensory deprivation on them. Humans who are subjected to those same conditions become mentally disturbed.” -Paul Spong, the founder of OrcaLab
John Hargrove, SeaWorld “Whistleblower”
Blackfish led me to John Hargrove’s book, Beneath the Surface: Killer Whales, SeaWorld, and the Truth Beyond Blackfish. Hargrove was a senior trainer at SeaWorld and spent 14 years of his life working in the industry. He left the company and became a “whistleblower” and provided even more insight into the practices of SeaWorld. I could hardly put this book down at times, it was so well-written and read almost like a novel.
Hargrove loved orcas from childhood and dreamed of being a trainer someday. While that dream came true and it was thrilling to work with the whales, it was also heartbreaking for him. He left because he was no longer able to go along with SeaWorld’s policies that he considered poor. These surrounded breeding practices, the separations of calves and mothers, and the mistreatment of trainers and animals alike. He loved the whales and had strong bonds with them, especially one named Takara. But he knew that “love alone was not going to save them.” He dedicated his book to all the orcas he swam and built relationships with for many years. “You gave me everything,” he wrote. “But most especially to Takara, who taught me so much and whom I loved the most.”
“It would make my life so much easier if I could say that those animals are thriving in captivity, living happy and enriched lives. Unfortunately, after all the years of experience that I had, I saw the psychological and physical trauma that results from captivity. A massive corporate entity is exploiting the hell out of the whales and the trainers.” -John Hargrove25
David Kirby’s book
Death at SeaWorld: Shamu and the Dark Side of Killer Whales in Captivity by David Kirby was published the same month that Blackfish first aired. Though difficult to read at times, the book was very well researched and well cited. Regardless, I learned a lot from his research. Throughout the book, Kirby followed the life and experience of marine biologist and animal advocate, Dr. Naomi Rose. It introduced many people taking part in this debate including former trainers, eyewitnesses of marine park incidents, animal rights activists, and marine mammal biologists. This book went beyond SeaWorld’s problems and examined the problem of cetacean (whales and dolphins) captivity. It covered the multiple accidents and deaths in marine parks, the OSHA cases against SeaWorld, the media backlash against SeaWorld from Blackfish, and other orca studies across the world. I recommend this book to those who really want to delve into the details of these topics.
Long Gone Wild
This film, released in 2019, focused on the continued plight of captive orcas, picking up where Blackfish left off. The film covered the case against captivity as orcas continue to live in barren concrete tanks. It explained the effects of Blackfish on SeaWorld, as the park took a major hit on attendance and profit. It appealed to its audience to stop supporting SeaWorld – “Don’t buy a ticket.”
The documentary went into depth about the plight of captive marine mammals in Russia and China, triggered by the growth in ocean-themed parks in those regions. It also presented the proposed Whale Sanctuary Project, a seaside sanctuary for retired orcas that would provide a safe, permanent home in their natural habitat.26 There are sanctuaries for elephants, tigers, chimpanzees, and other land mammals, but none for marine mammals in the entire world. I’ll write a post in the near future about the project.
Many orca experts were in the film as well as renowned authors such as David Kirby (mentioned above) and David Neiwert (Of Orcas and Men: What Killer Whales Can Teach Us). It explained the monetary value of the whales and how it has increased over time. Between 1966-1970, dozens of orcas were captured around Puget Sound, Washington, and sold for $30,000 – $50,000 each, some to SeaWorld. In 1976, people captured nine orcas from the seas around Iceland and sold them for $150,000-$300,000 each. Today, the wildlife trade values each orca between $2 million and $7 million dollars.
By the 1980s, wild orca captures had become controversial, especially in Western cultures. SeaWorld realized it would need to rely on breeding in order to have additional orcas for its parks. In 1985, Katina was born, becoming the first “Baby Shamu” for marketing purposes. It was effective. By 1989, SeaWorld had become a billion-dollar corporation.
SeaWorld did not respond to requests for interviews for this film.
The Case Against Marine Mammals in Captivity
I found this publication27 from the Animal Welfare Institute and World Animal Protection, authored by Dr. Naomi A. Rose and Dr. E.C.M. Parsons. This is by far the best report on this subject that I’ve found and at times difficult to stop reading. It is extremely well researched, organized, and written. It addresses the history of the public display industry and marine parks, the capture of cetaceans, conservation issues, animal environment, veterinary care, mortality and birth rates, ethics, swim with dolphins attractions, and the legacy of the film Blackfish. I highly recommend this if you are researching this topic, or even if you are just interested.
“The only hope of winning this war is for the public to stop buying tickets.” -Ric O’Barry, Founder and Director of The Dolphin Project
Orca performance at SeaWorld Orlando. Photo by Jo-Anne McArthur / We Animals (https://weanimalsmedia.org/)
My intention for this post is to make you think about the issue of captivity. Reconsider buying tickets to these parks. I’m going to save my money. Someday I’ll take my son whale watching to witness these beautiful creatures free in their own environment. In my next post, I want to explore the issues in detail. I’ll be using research from the sources I’ve listed in this article and many more. Thanks for reading!
Additional Resources:
A Fall from Freedom from the Discovery Channel was a good film with some dated filmography and interviews. However, I learned more about killer whales, the captive industry, and the people who study them. This film helped me put faces with names that I’d read about in David Kirby’s book.
The Cove, an Academy Award-winning film that heightened public awareness of the global problems surrounding dolphin captivity. From the Oceanic Preservation Society: “A team of activists, filmmakers, and freedivers embark on a covert mission to expose a deadly secret hidden in a remote cove in Taiji, Japan. By utilizing state-of-the-art techniques, they uncover a horrible annual tradition of unparalleled cruelty. A provocative mix of investigative journalism, eco-adventure, and arresting imagery make this an unforgettable and courageous story that inspires outrage and action.” I appreciate this film and think it offers valuable insight. But it was difficult to watch at times due to the graphic nature of the content. The team of people was amazing. They risked their lives to capture the footage and expose the mass murders of dolphins.
Report, The Performing Orca – Why The Show Must Stop: An in-depth review of the captive orca industry, by Erich Hoyt, Whale and Dolphin Conservation Society, January 1, 1992. This is an older publication, but many of the issues are still as relevant today.
Article, “The harmful effects of captivity and chronic stress on the well-being of orcas (Orcinus orca),” Journal of Veterinary Behavior, Volume 35, pages 69-82, January–February 2020.