Category — Animals
The loss of our female Sumatran rhino “Suci” to iron storage disease just over a year ago on March 30, 2014 was a devastating blow to the Cincinnati Zoo’s Sumatran rhino breeding program. Iron storage disease is an insidious disease affecting many wildlife species that are maintained in zoos, ranging from marine mammals to birds. In addition to Sumatran rhinos, black rhinos are susceptible to the disease, whereas white rhinos and Indian rhinos remain largely unaffected.
The disease is extremely challenging because we do not know how to prevent it, diagnose it or treat it. The only known cure for the disease is frequent, large volume phlebotomies (blood collection), but nobody knows how much blood to draw or how often it must be removed to keep a rhino healthy, and it is difficult to perform phlebotomies without anesthesia. The best method for monitoring iron storage disease is to measure serum concentrations of ferritin, a protein involved in iron transport and storage, but ferritin can be species-specific, so an assay for humans or horses may not work accurately in rhinos. Such was the case with our Sumatran rhinos.
However, thanks to a dear family committed to helping rhinos that wanted to make a gift in honor of Suci, CREW has embarked on a new study to develop an assay specific for measuring rhino ferritin. The first step – isolating the rhino ferritin protein – is complete, and our goal is to have a functional assay by this coming summer. Our hope is that the assay will be used to monitor iron storage status in many rhinos throughout North American zoos to ensure the disease is detected before the rhino becomes sick.
This project was made possible by the generous donation of Mr. and Mrs. Jeremy S. Hilton and Family.
(Reprinted from CREW Review Fall 2014)
April 3, 2015 4 Comments
And the names of the painted dog puppies are Riddler, Bruce, Alfred, Hugo, Luke and Oswald for our six boys. Lucy, Quinn, Selina and Ivy are the four little ladies. If you didn’t catch the theme here, it’s Batman (don’t worry, I wasn’t that familiar with it either). Some are characters from the show, a couple from the comics, some from the motion pictures and others from the animated series. It all started when the one puppy we could distinguish from all of the others had an upside down white question mark on his back. This one clearly had to be called Riddler. The rest just followed.
However, there are two that are a bit more obscure and don’t fit the more well known character names. Luke and Lucy. They are indeed in the Batman realm, but it is not a coincidence that they have a deeper meaning to me. I have been working with African painted dogs for almost a decade. That is also how long I have been waiting to have a litter survive. Since painted dog puppies basically have a 50/50 shot of surviving, that all ten have thrived thus far and are doing great is a miracle! It has always been my hope to someday be able to pass on the names of the first pair I ever worked with. The first painted dogs that made me realize that this was going to be my life’s passion and to be involved in the bigger picture of their survival, both in captivity and in the wild.
As a zookeeper, we love all animals, but there are those that touch our hearts in ways that affect us deeply. Luke and Lucy were those animals for me. It is my hope that the ‘new’ Luke and Lucy (with their matching white spotted rumps), along with their siblings, inspire others to realize what special creatures painted dogs really are. This summer, you all will get the chance to see this for yourselves once they are on exhibit. Can’t wait to see you there!
March 20, 2015 7 Comments
Here in the Wings of the World bird house at the Cincinnati Zoo, kea are all the hype this season. And this is with good reason. The success of the new interactive flight this past summer is noteworthy, but behind the scenes something just as exciting was occurring. The Wings of the World department includes an area off exhibit dedicated to incubating eggs and hand-rearing chicks. This year we successfully hatched out and raised six kea chicks. Raising this species is a very time consuming process that requires the help of all the bird staff over the course of five months, from day one of incubation to fledging.
Artificially incubating eggs is a delicate endeavor. Eggs are fragile and sensitive; therefore it is vital to keep them in a clean environment with precise temperature and humidity settings. The bird department has four incubators dedicated to this, all set up for different species of birds that may require different parameters. Eggs are weighed and candled twice a week in order to closely monitor development. Candling is a technique used to see the developing embryo inside the egg. This technique indicates to keepers whether or not a chick is developing correctly, is in the right position for hatching, and when the hatching process has begun. Keeping track of weights is an indicator of whether or not humidity in the incubator needs to be adjusted. Kea egg incubation term is 21-28 days.
Once a chick has pipped (pierced the outer layer of the shell), it is moved to a different incubator where the temperature and humidity is ideal for hatching. It can take anywhere from 24-72 hours for a chick to hatch. All six of our kea hatched out on their own and proved to be strong and healthy when they were immediately standing upright and exhibiting a feeding response.
After a few hours, the chick can be moved to another enclosure, called a brooder. The brooder keeps the chick’s environment at a warm stable temperature. Keepers use washcloths and towels rolled up in a bowl to simulate a nest. As chicks grow and down feathers come in, temperatures and enclosures are modified to fit their needs.
Kea chicks are fed a specialized formula that meets all their dietary needs. The formula is made up fresh at each feeding and fed through a syringe. Weights are obtained daily and detailed notes are kept to ensure the chick is gaining the appropriate amount each day and hitting developmental milestones. The keas are initially fed every three hours, six times per day. That makes for a long day for the bird keepers! When the chicks start to become very mobile and curious with their surroundings, solid food is offered. Whether they play in it, walk in it, or sleep in it, it’s a good experience for them to have access to solids. The bird staff spends a lot of time hand-feeding different food items in different forms until chicks begin to show interest. Overall, the best method to wean chicks is to have an adult kea around to show them how a real kea does it.
Once the kea are fully feathered and starting to self-feed, we begin daily field trips to the kea exhibit and holding areas. This gives the chicks an opportunity to adapt to a new environment, explore, exercise, and learn how to behave around adult keas. As the chicks become more comfortable in this new environment, the longer they can stay out. The length of the trips and the need for supervision from keepers all depends on how the kea seem to be adapting. Overall, it takes around four months to hand-raise a kea and then fully integrate it into the flock. This is on par with a kea chick that fledges around 3-4 months of age in the wild.
Raising kea takes a lot of time and effort from the bird staff, but the reward is great. The Cincinnati Zoo is the only AZA-accredited institution to hatch out and raise kea in the last five years. What an accomplishment! Next time you are at the Zoo, stop by the free flight aviary next to Wings of the World and see if you can spot one of our six juveniles, all grown up.
March 2, 2015 2 Comments