Tanuki: Reproduction

Summary: Let’s talk babies! The reproductive cycle of the Tanuki is simple but interesting! Join Kiersten as she walks you through the seasonal changes that brings Tanuki pups.

 

For my hearing impaired listeners, a complete transcript of this podcast follows the show notes on Podbean

 

Biology and Conservation of Wild Canids, edited by David W. Macdonald and Claudio Sillero-Zubiri. Raccoon dogs: Finnish and Japanese raccoon dogs - on the road to speciation?” By Kaarina Kauhala and Midair Saeki, pgs 217-226. https://static1.squarespace.com

Nyctereutes procyonoides, Raccoon Dog. Animal Diversity Web. https://animaldiversity.org

Music written and performed by Katherine Camp

 

Transcript 

(Piano music plays)

Kiersten - This is Ten Things I Like About…a ten minute, ten episode podcast about unknown or misunderstood wildlife.

(Piano music stops)

Welcome to Ten Things I Like About… I’m Kiersten, your host, and this is a podcast about misunderstood or unknown creatures in nature. Some we’ll find right out side our doors and some are continents away but all are fascinating. 

This podcast will focus ten, ten minute episodes on different animals and their amazing characteristics. Please join me on this extraordinary journey, you won’t regret it.

The fifth thing I like about Tanukis is their reproductive cycle. Like many mammals, raccoon dogs enter eastru only once a year; therefore, they bear young only once a year.

In the last episode we discovered that tanuki are monogamous, meaning the male and female mate with only one partner each year. In some populations these bonds may last year after year, where as other populations may only stay together one year.

Now, as we all know, before mating comes courting. So let’s start there. I’d love to tell you how they court each other with elaborate dance, vocalizations, or hide and seek, but we just don’t know. Not much research has been done on wild populations courting behavior. I’m unsure why. It could be either no one focused their research on the topic or it is difficult to find and observe courting behavior in the wild. 

From captive individuals, we have learned that scent-marking and male female interactions increase before the female ovulates. She is courted by three to four males and an up turned U-shape tail indicates that the male is interested in mating and may also play a role in determining dominance. Reluctantly, that’s about all we know about raccoon dog courting.

Once the male and female have determined they are a fit couple, they will mate. This behavior typically happens in early March and gestation lasts approximately 60 days. Pups are typically born sometime in May. This is not coincidence, listeners. It’s perfectly timed so that pups are born when there is abundant resources available. Nature, man, it is perfect.

For populations that hibernate through the winter, breeding season begins just after they wake to warmer temperatures. 

After the female is pregnant, the couple will find a burrow to call home. They will move into an abandoned badger or fox den and make it their own, and why not, quick move in and minimal energy output. Toward the end of gestation, the female will remain in the den while the male hunts for food and brings home dinner. 

Typically five to seven pups are born in each litter.  The young are altricial at birth, meaning they are born with closed eyes, very little hair, and the inability to care for themselves. They are covered in black fur without the mask facial markings. At nine or ten days, the pups eyes open and teeth emerge around fourteen to sixteen days. They will wean around 30 to 40 days, but until then they rely on mom for milk. By weaning time, their facial markings are evident making them look like miniature versions of their parents. 

While mom stays in the den with the pups, dad hunts for food bringing home the bacon, as they say. Once the pups are weaned, they transition to solid food and mom leaves the den. After being cooped up with her young, she goes out to hunt while dad take over parental duties. She will bring back food for the pups and until they are ready to leave the den male and female will trade off hunting and pupsitting duties. 

By about three months, they pups are the size of young adult raccoon dogs. Four month of age brings hunting lessons. The pups will follow mom and dad and learn how to hunt by watching their parents. At nice to eleven months, the pups will be full grown and out on their own. 

By the time they leave the company of their parents, they are sexually mature and the following spring, they will most likely be looking for mates of their own. We are not sure how long raccoon dogs live in the wild, but in a study of trapped tanuki the oldest males were approximately 5 and 1/2 years while the females were 7 and 1/2 years. Of 320 captured individuals, 68.4% were younger adults. It’s not terribly surprising tha these mammals mature at such a young age given that they may only live 5 to 7 years. 

In captivity, tanuki have lived to just over 14 years. 

That concludes this episode about the reproductive cycle of the tanuki. Thank you for listening because raccoon dog reproduction is my fifth favorite thing about this intriguing mammal.

 

  If you're enjoying this podcast please recommend me to friends and family and take a moment to give me a rating on whatever platform your listening. It will help me reach more listeners and give the animals I talk about an even better chance at change. 

 

Join me next week for another fascinating episode about Tanuki.    

 

(Piano Music plays) 

This has been an episode of Ten Things I like About with Kiersten and Company. Original music written and performed by Katherine Camp, piano extraordinaire.