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About Author: JoAnne Simerson

Posts by JoAnne Simerson

50

Polar Bears: No Easy Answers

Ah, Chinook!

November 16 has come and gone and still no news with Chinook. The estimated gestation for polar bears is 195 to 265 days; since Kalluk and Chinook bred in mid-February, we certainly expected to know by now if Chinook is or isn’t pregnant.  All we know for certain is that she has not had any cubs . . .yet.

Her hormone analysis shows similar profiles to other polar bears that have given birth in late November or December. It is also a profile that has not produced cubs. Every year we get a bit better information, but it is still not the perfect test. Chinook’s ultrasound exams also showed promise of her uterus developing as we’d not seen in past years. We also had two exams scheduled where Chinook let us know she did not want to join in. However, this week she enthusiastically participated. We easily could see her uterus but no cubs were to be seen.

So for now we have no easy answer to the question “Is she or isn’t she?” We will continue to care for her as she needs until the time that she shows us she is ready to be out with Kalluk and Tatqiq, and then we’ll have our terrific trio together again or until our beautiful girl has those precious white fur bundles, and we can all know our finger crossing and wishes worked!

JoAnne Simerson is a senior keeper at the San Diego Zoo. Read her previous post, Polar Bear Ultrasound.

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Polar Bear Ultrasound

Will these two become parents this year?

Pieces of the Puzzle

Yes, we have begun the ultrasound exams with Chinook! Yes, she is cooperative, and we are very hopeful that this will be the year that once again we will have polar bear cubs at the San Diego Zoo. But how difficult is it to ultrasound a polar bear who is wide awake? The pieces of the puzzle are coming together.

The first puzzle piece, training, was relatively easy. Due to the great trusting relationship between Chinook and her keepers, and the history of learning together, teaching Chinook to roll over and hold went quickly. The next part was to get her to accept the ultrasound gel and actual probe on her belly. Chinook does very well with it all. And please keep in mind she is the only polar bear in the world who is trained for the ultrasound procedure.

We tend to take for granted the use of ultrasound to diagnose pregnancy. It is almost commonplace now. It wasn’t that long ago when ultrasound exams on our giant panda Bai Yun were also history in the making! Again one of the challenges is to find a very small fetus in a very big bear and ensure the safety of Chinook, the veterinarian, and, of course, the ultrasound probe! We are lucky to have many talented folks at the Zoo who have helped in designing and building various pieces of the puzzle. We now have a specially molded probe holder and removable bars on our training crate that allow for better movement of the ultrasound probe.

Every ultrasound image is recorded for review by our veterinary staff. We are confident that “when” (positive thinking) polar bear cubs begin to develop, we will be able to see them well and document another historical event: first-ever in utero polar bears!

Until then, we continue to collect urine and fecal samples to chart Chinook’s hormonal changes and monitor her behavior for dramatic and subtle changes that will alert us to her needs for a successful pregnancy and rearing of polar bear cubs. The cameras, microphones, and recorders are all ready, as long as she chooses those areas to den!

Now that we have all the pieces to the puzzle for our Chinook, it is important to remember that there are many pieces of polar bear reproduction that are missing. Much of our research with polar bear sensory ecology (see post Polar Bears: Getting Ready) will help shed light on pieces of the puzzle that would be very difficult, if not impossible, to do in the Arctic. To be able to document a polar bear pregnancy may give us more information on how to better protect polar bear maternity areas at critical times as more environmental impact jeopardizes the survival of our wild polar bears. How wonderful to be part of keeping polar bears in our future and not just a part of our history.

JoAnne Simerson is a senior keeper at the San Diego Zoo. Read her previous post, Polar Bears: Dare to Hope.

Update October 28, 2011: Both ultrasound and fecal hormone analysis look possible, but nothing is confirmed yet. Keep everything crossed!

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Polar Bears: Dare to Hope

Chinook gives Kalluk's scruff a playful tug.

We’ve all experienced wanting something so bad that it hurts. People will tell you all kinds of things to make the waiting a bit less painful. You begin to fill your head with all the knowledge you can to know if it will really happen or not. And then comes the superstitions: don’t step on a crack, don’t talk about it, fingers and toes crossed. But no matter what, it just takes time to get the really special things that you want! What am I talking about? Wondering if polar bear Chinook is going to have cubs, of course! Is there anything else on our minds? Dare we hope?

As you know, Chinook and Kalluk marked Valentine’s Day 2011 by marking the start of the polar bear breeding season. If you were to ask Kalluk, he would tell you it was a successful season. The good news is that Chinook did not go back into season. This is very good, as we believe that when a female polar bear ovulates and there is fertilization, in most instances she will not cycle again that year. This is a good knowledge point.  Chinook, as many of you have observed, has also been putting on weight. This would not be due to carrying cubs, as they are barely over a pound at birth, but would make sense that her metabolism would compensate to hold as much as possible to nurse and provide for cubs—another good point of knowledge.

Polar bears experience delayed implantation, so we would expect to see Chinook changing behaviorally once the fertilized egg implants, around 60 days before birth. Yes, she is beginning to seclude herself away from Kalluk and Tatqiq. If gestation is 195 to 265 days for a polar bears, then from the 10 days of breeding, Chinook would be due between August 28 and November 16. Panic—it’s already September! Breathe, breathe. With such a long gestation, she could be implanting right now with a due date of early November.  Most polar bear births in North American zoos have occurred in the first week of November, the earliest was on October 13. Good things to know!

We have been collecting fecal samples for hormone analysis with the research branch of the Cincinnati Zoo and urine samples for hormone analysis with the Memphis Zoo. So far, nothing conclusive from the urine analyses, but the fecal analyses look positive for pregnancy. . .or pseudopregnancy. BUT—and yes, a big but—Chinook’s hormone profile is consistent with profiles of other polar bears that have given birth! Dare we hope?

So with knowledge in place, we’re avoiding walking under ladders, stepping on cracks, saying anything to jinx it, and above all, fingers and toes crossed. You better believe we are daring to hope that this time will be for sure!

JoAnne Simerson is a senior keeper at the San Diego Zoo. Read her previous post, Little Polar Bear: Lessons.

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Little Polar Bear: Lessons

Qannik demonstrates the paw to hand behavior. What a smart cub! Photo by Andrew Fore.

JoAnne was at the Louisville Zoo in Kentucky to help staff with their newest arrival, an orphaned polar bear cub named Qannik. Read her previous post, Little Polar Bear Orphan.

For polar bear cubs, life is all about learning to survive in the Arctic from the moment they are born until Momma kicks them out. Momma bear has all the right stuff for teaching: intelligence, nourishment, and communication. For Qannik, communication with her keepers would be the first lesson. Luckily, Qannik is very intelligent, and, dare I say, so are keepers! Training using positive reinforcement is how we communicate with our bears.

The sloping false bottom made for Qannik's pool.

We taught Qannik to slurp her formula out of a large syringe that is easy to use from outside the mesh. Qannik is a large girl now and will soon be reaching over 400 pounds (180 kilograms), so it’s important we teach her just as we would when she is an adult polar bear. This beginning relationship is so important: we look for nice, relaxed eye-to-eye moments. Next are a few simple behaviors like shifting rooms, sitting, or presenting a paw when asked to do so.

While the Louisville Zoo keepers were flying to Alaska to pick up Qannik, one of my tasks was to build a false bottom in her new pool to help her learn how to swim. In the Arctic, Momma bear offers her back for the young cubs to hold on to until they learn to swim well. With the help of Steve Goodwin, Louisville Zoo’s all-round-can-do-it-all guy (he makes incredible pottery, too!), we built, netted, tied, and lashed a false bottom into the pool. The design allowed for sloped access into the deep end, strength enough to hold a pouncing 60-pound (27 kilograms) bear, and be easy to take apart once Qannik could swim and get out of the pool on her own.

Qannik keeps everyone in suspense as she contemplates a swim.

The day after Qannik arrived, we watched her make her first plunge into the pool.  Miss Qannik knows how to hold her audience! She spent the majority of the day on the first steps holding on by her toes, stretching ever so far that we all knew she had to go in! She would turn and look at us as if to say “Gotcha!” Finally she rewarded our patience by a not-so-graceful dive into the pool after a white bucket toy.

After the first excitement we held our breaths: would she be able to get out of the pool? Well, of course—she’s a polar bear! At that moment we decided we could take the false bottom out of the pool, as it had done its job! The slope helped her with gradual ease into the pool, it was strong enough to hold her, and was easy to take apart. Did you know little polar bears are also helpful? Qannik hopped right back into the pool and began to dismantle the false bottom to the floor. Louisville Zoo keepers report she now throws all her toys into the pool and is officially a swimming maniac.

Qannik helps dismantle the pool's false bottom, as it's no longer needed.

When the time came to say goodbye to little Qannik, it was not without a lump in my throat. In just a week she had grabbed my heart for all she has been through in her short life. What a spirit—so tenacious, so tough, so intelligent, so irresistible, a connection to the wild. All polar bears are like Qannik. It’s hard to think that there will be more Qanniks to rescue and some that we won’t find.

My time with Qannik was also about the wonderful folks who all came together to rescue and care for this little bear and the great team that will be there when the next bear needs help. We can make the changes as individuals joining together into communities to collaborate on conservation to save our arctic ice and the beautiful spirited creatures that live there.

Be sure to share some time with the San Diego Zoo’s fabulous trio on Wednesday, July 13.  We hear we are in for a summertime snow fall!

JoAnne Simerson is a senior keeper at the San Diego Zoo.

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Little Polar Bear Orphan

Qannik at rest in her new home at the Louisville Zoo. Photo by Andrew Fore.

A Little Polar Bear’s Travels

Everyone was worried when word first came out about an orphaned polar bear cub in Alaska two months ago. Luckily for the cub, many folks had been preparing for this exact day for the past few years. Understanding that with the warming of the Arctic, the resulting sea ice loss would put pressures on polar bear survival, ideas, plans, and communication avenues were established between conservation groups like Polar Bears International, government agencies like the U.S. Fish and Wildlife Service, and zoo professionals from North America to safely and expertly respond to rescue a polar bear orphan.

Qannik peeks out of her travel crate at the airport. Photo by Andrew Fore.

The cub was named Qannik (ken-ik), an Inupiaq word for snowflake. She was underweight at 15 pounds (6.8 kilograms) when rescued, but now, after two months of adjustment and care at the Alaska Zoo, the 60-pound (27 kg) cub was flown on a 747 jet, compliments of UPS, to her new home in Kentucky at the Louisville Zoo’s new Glacier Run! It’s hard to believe 10 years ago we were going through the same experience when the San Diego Zoo’s Kalluk and Tatqiq were rescued on the ice of Alaska at three months old. Along with the excitement are worries about how to make sure we give the best care ever! Back then we had many folks to call on for advice. It is now our turn to share what we learned back then. We compiled everything from formula amounts, recipes, how many feedings per day, weights at what age (I forgot that Kalluk gained five pounds in one day!), training records, veterinary records— everything we could put together—and sent it all to Louisville.

JoAnne greets Qannik at her new home. Photo by Andrew Fore.

I arrived in Louisville the day before Qannik to help with last-minute preparations.  Part of the Louisville Zoo staff had headed to Alaska to begin getting to know Qannik and becoming familiar to her. They and her caretakers from Alaska escorted her on the plane to Louisville. During the flight she slept often and was treated with frozen popsicles made of her formula—definitely a big hit! How often when we fly we want our luggage to be the first off? If you’re a polar bear cub, it’s no problem! Qannik was the first one off the plane. We then placed her in a van and drove back to the Louisville Zoo. How many of you have been in a van with a polar bear cub? She traveled easily—no complaints, just lots of sniffing.

Next she was carried into the bedroom area and the crate door opened. She immediately came out and explored—well, explored after she had a bowl of formula and small chunks of Alaskan salmon! After a bit of a romp and roll through the fresh hay, she crawled into the den and fell asleep.

To be continued. . .

JoAnne Simerson is a senior keeper at the San Diego Zoo. Read her previous post, Polar Bears: What Happened?

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Polar Bears: What Happened?

Chinook pauses between doing her morning laps.

On February14, 2011, and for 10 days after, Chinook and Kalluk were inseparable. They slept together, ate together, swam together, and yes, bred. We can confirm that at this point we will be getting ready for the possibility of polar bear cubs this fall. However, this year breeding came early, and it’s possible we may see Chinook cycle again. It is interesting, as several other zoos with breeding polar bears have experienced this early breeding as well.

The gestation period for polar bears is 195 to 265 days, so before you get out the calendars and calculators, that gives us a due time of August 28 to November 16! To try to get as much information as possible along the way, we are collecting fecal samples and urine samples for hormone assay, and we will again do ultrasound exams with Chinook as we approach implantation and birth time. As you know, she does seem to greatly enjoy her belly-rubbing ultrasound sessions!

Kalluk is still showing a heightened level of testosterone with his behavior and inconsistent appetite. For males in the wild, this lack of eating is proving to be of concern as we lose more ice. In the wild, male polar bears begin searching for receptive females early in the spring. Once they breed with a female, she goes off to hunt and store as much fat as possible while he goes off in search of another receptive female. As the ice disappears earlier in summer, the males are losing precious time to hunt.

Kalluk doesn’t have this worry, as finding food is never an issue. Over the past weeks it has been difficult to get him to acknowledge food, but yesterday he ate 20 pounds (9 kilograms) of meat in one sitting. Kalluk is also beginning to actually sleep; during breeding season, he is so intent on where Chinook is that he rarely does anything more than a quick nap. Both eating and sleeping are good signs that we may be heading back to normal!

Chinook also has some resting to do. Kalluk is twice her size and very attentive to her every move. She is now spending a great deal of time snoozing in our mulch piles or taking long, luxurious swims in the pool. Two days ago Chinook and Kalluk had a great romping play-and- dive session, another sign that “normal” may be right around the corner.

Tatqiq seems to have a great understanding of what breeding season means to her. She is patiently waiting until her friends lose their romantic interests and regain their playful spirits and once again join her in a good romp around the exhibit. Until then, she is greatly enjoying having all the carrots to herself and is busy hunting gophers in Polar Bear Park.

JoAnne Simerson is a senior keeper at the San Diego Zoo. Read her previous post, Polar Bear Dance, where she has responded to questions sent there.

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Polar Bear Dance

Kalluk is more than ready for love!

Some of you have noticed our male polar bear, Kalluk, and his “dance” of frustration in the past few days. We only see this from him during breeding season, typically at the beginning of the season as hormone levels are building, and then just before breeding when Chinook is not submitting, and then after the breeding cycle is done and Chinook is again not submitting.

We have observed that male polar bears go into a breeding set hormonally before the females do, and it lasts longer as well. In the wild, a male would breed with a female and then go find another willing mate; thus, a good reason for their season to last longer. The frustrated walk has been observed in the wild with both polar bears and brown bears in some situations.

Luckily, it would appear that in honor of Valentine’s Day Chinook is ready to breed, and our boy is finally losing some of his frustration!

JoAnne Simerson is a senior keeper at the San Diego Zoo. Read her previous post, Polar Bears White and Brown.

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Polar Bears White and Brown

Chinook?

It has been a really busy beginning to 2011. Chinook let us know in December that cubs were not on the way (see post Polar Bears: What December Brings), and she was ready to join her buddies Kalluk and Tatqiq in life at Polar Bear Plunge. As keepers this is sometimes a worrisome time: not sure if the relationships from the past will still be there. Of course, after some initial greeting time, the famous three were up to their old antics. It is also the time of the year that the girls seem to be best friends, and Kalluk spends more time practicing his basketball skills!

Is that really you?

We used some of this time to do annual maintenance on the front pool: steam cleaning, replacement of lights, fresh mulch, etc. This meant that all three bears would be inside the bedrooms and yard—all together! With great affection, you must know that these three are beyond messy! Besides providing them with loads of boxes, burlap, and hay, they also felt it necessary to bring in fresh mulch from the yard into the bedrooms and the indoor pool—every day! Once back out to the main exhibit, Chinook definitely showed off that she truly is the queen of the mulch roll! Good thing Kalluk has a good sense of smell, as it appeared he was wondering where the brown bear came from!

Recently, Kalluk and Chinook have begun their great flirtation we see around breeding time. It seems a bit early this year, but they seem to be greatly enjoying each other’s company more than past years. Could this be a good sign? Tatqiq is now a bit of a loner and just stays away when the three are together. She has learned that this, too, will pass, and soon her silly, amorous buddies will be interested in playing again.

We are still collecting fecal samples from Chinook in hopes of being able to get a hormonal assay to determine pregnancy; we are now also collecting urine samples. Any information we can achieve will help us better understand polar bear reproduction.

We have also placed on the Wish List a request to give the polar bears snow. Take a look! If we reach our amount, we’ll be sure to give you notice to watch the fun on Polar Cam. Until then, keep doing your part to conserve and help the polar bears in the Arctic. Unfortunately, for all our cold weather down here it has been a very warm winter for our ice bears of the north!

JoAnne Simerson is a senior keeper at the San Diego Zoo.

0

Polar Bears: What December Brings

A young male polar bear is trapped in ice slush.

I’ve just returned from my annual trip to Churchill in Manitoba, Canada, to work with Polar Bears International. This was my 10th year of doing so, and, as many of you know, I have seen dramatic changes in the environment and animals that live there in just this decade. This year has provided the shortest ice season in recorded time: the polar bears lost a full nine weeks of hunting time. The water and air temperatures for November and December continue to be above normal, delaying the formation of ice again this year. The polar bears have been hunting during low tide and have been fortunate to occasionally find harbor seals resting among the rocks. The bears must be vigilant that they return to the shore before the tide rushes in.

The bear at rest after escaping the slush.

I watched with great awe as a young male polar bear learned the hard way that the fast-moving tide with newly formed slush ice can be a life-or-death moment. This moment lasted over two hours for him. At great distance we saw this bear struggling to swim back in to safety. The combination of current and heavy ice slush proved to be an admirable preventer. At times his head disappeared under the surface as he rested. Just as I thought the worst, his head would come up again, and he would make a supreme effort to pick his massive paw, covered in ice, out of the water and push himself forward.

The exhausted bear

Eventually, he made it to ice he could crawl across. At well over two hours of enormous effort he reached solid ice. He lay still for a few minutes and then joyously began to dry off, giving an amazingly animated show of rubbing and rolling. Off he then went to cruise the coastline, still in the hunt for food and survival. He seemed to be teaching us that this is now everyday life for our ice bears when the ice is not forming as it should. How many are not making it back to solid footing? This young male polar bear’s effort to survive makes our effort to conserve seem so minimal.

After resting, he dries off in the snow.

The forecast for the Hudson Bay: a thin ledge of ice should be formed by mid- December.

What does December bring for our polar bears in San Diego? Unfortunately, it does not look like the pitter patter of tiny paws will be filling our ears. Although we were all so hopeful, it looks like we’ll be repeating this process next year. Our girl Chinook has become very active and is spending lots of time playing in back and looking longingly over at her two buddies Kalluk and Tatqiq. We did another ultrasound exam this week and found a very healthy girl but no sign of cubs. So we are now looking to reintroduce our fabulous trio very soon. Putting such large bears together does not come without risk. The introductions and the time they spend together will be determined by their behavior. But if the interactions they have been having in the back area are any indicator, our three will be very happy to have each other to cavort with. We have some fun new balls for play, and we will continue to rotate the three in combinations throughout the day.

Of course, Kalluk and Tatqiq will have to now share their mulch piles with Chinook—please excuse the dirt-filled water! (Thanks, Water Quality Team for keeping the filtration running so well!) Keep watching Polar Cam to stay up to date on how it’s going. Just think, breeding season is just around the corner. Here we go again!

JoAnne Simerson is a senior keeper at the San Diego Zoo. Read her previous post, Polar Bears: The Latest.

53

Polar Bears: What December Brings

A young male polar bear is trapped in ice slush.

I’ve just returned from my annual trip to Churchill in Manitoba, Canada, to work with Polar Bears International. This was my 10th year of doing so, and, as many of you know, I have seen dramatic changes in the environment and animals that live there in just this decade. This year has provided the shortest ice season in recorded time: the polar bears lost a full nine weeks of hunting time. The water and air temperatures for November and December continue to be above normal, delaying the formation of ice again this year. The polar bears have been hunting during low tide and have been fortunate to occasionally find harbor seals resting among the rocks. The bears must be vigilant that they return to the shore before the tide rushes in.

The bear at rest after escaping the slush.

I watched with great awe as a young male polar bear learned the hard way that the fast-moving tide with newly formed slush ice can be a life-or-death moment. This moment lasted over two hours for him. At great distance we saw this bear struggling to swim back in to safety. The combination of current and heavy ice slush proved to be an admirable preventer. At times his head disappeared under the surface as he rested. Just as I thought the worst, his head would come up again, and he would make a supreme effort to pick his massive paw, covered in ice, out of the water and push himself forward.

The exhausted bear

Eventually, he made it to ice he could crawl across. At well over two hours of enormous effort he reached solid ice. He lay still for a few minutes and then joyously began to dry off, giving an amazingly animated show of rubbing and rolling. Off he then went to cruise the coastline, still in the hunt for food and survival. He seemed to be teaching us that this is now everyday life for our ice bears when the ice is not forming as it should. How many are not making it back to solid footing? This young male polar bear’s effort to survive makes our effort to conserve seem so minimal.

After resting, he dries off in the snow.

The forecast for the Hudson Bay: a thin ledge of ice should be formed by mid- December.

What does December bring for our polar bears in San Diego? Unfortunately, it does not look like the pitter patter of tiny paws will be filling our ears. Although we were all so hopeful, it looks like we’ll be repeating this process next year. Our girl Chinook has become very active and is spending lots of time playing in back and looking longingly over at her two buddies Kalluk and Tatqiq. We did another ultrasound exam this week and found a very healthy girl but no sign of cubs. So we are now looking to reintroduce our fabulous trio very soon. Putting such large bears together does not come without risk. The introductions and the time they spend together will be determined by their behavior. But if the interactions they have been having in the back area are any indicator, our three will be very happy to have each other to cavort with. We have some fun new balls for play, and we will continue to rotate the three in combinations throughout the day.

Of course, Kalluk and Tatqiq will have to now share their mulch piles with Chinook—please excuse the dirt-filled water! (Thanks, Water Quality Team for keeping the filtration running so well!) Keep watching Polar Cam to stay up to date on how it’s going. Just think, breeding season is just around the corner. Here we go again!

JoAnne Simerson is a senior keeper at the San Diego Zoo. Read her previous post, Polar Bears: The Latest.

Note: Be sure to click on each image to enlarge it!

Join JoAnne on the next San Diego Zoo WorldWild Tour to Churchill this fall!