Random header image... Refresh for more!

Breeding North American River Otters

north_american_river_otter_ faceCharismatic and curious North American river otters are so much fun to watch, but to get them to breed? That’s a whole lot trickier! North American river otters, as their name would suggest, live as far south as the Florida everglades, throughout most of the lower 48 states all the way north to the sub-arctic regions of US (Alaska) and Canada.  For these otters, when to breed and give birth needs to be timed so the pups are born when it’s not too cold and there are plenty of resources for mom and pup(s) to thrive.  Basically, otters in the south give birth and breed much earlier in the season than otters living further north.

In addition, female otters undergo a process known as delayed implantation. Fertilized otter eggs start developing into embryos, but stop developing for 7-10 months until they are eventually triggered to implant into the uterine wall and develop once again. The female otter gives birth (litter size 1-4 pups) approximately 70 days after implantation starts. Delayed implantation is what, in part, helps river otters time when they give birth.  So how does one know when implantation has occurred and when their otter may give birth? — By monitoring the hormones in their poop!

Each year starting usually November through January/February, US Zoos send otter fecal samples to CREW hoping to figure out if their otter may be pregnant and when she may be due. This season we monitored fecal samples from 11 river otter females and we were able to determine 8 of these females were possibly pregnant and 6 of those have already given birth {for example: pueblo zoo, buffalo Zoo}, making it a banner year for river otter babies!

Pueblo Zoo Otter Pup

Pueblo Zoo Otter Pup

However, the story doesn’t end there. Our research has shown that female otters born further south and moved to another zoo much further north, don’t always respond to the environmental cues encountered at their new latitude and adjust when they should breed and give birth – making it hard to know when to pair otters for breeding – but those fecal hormones have also proven useful in determining when to pair up otters as well {North Carolina}.

Publeo Zoo Pups – On Zooborns

Buffalo Zoo Pups – On Facebook

North Carolina Pups – News Article

9 comments

1 kids summer day camps delray beach { 06.14.14 at 6:23 am }

Try these steps to move toward greater flexibility:.
It will definitely help you to pass the PMP exam within short span of time.
The attack on this naval base also reinforces the belief that Pakistan at
least knew the location of Bin Laden. s first summer camp then you
have to consider whether your child can manage staying alone in a resident camp for a period of
7-10 days. Or, chances are you’ll be tempted to investigate Portugal’s oldest night-club.
If a person understands oneself, only then a person can know
the idea of fun that is to be followed to make sure that one feels rejuvenated.
More than wanting to sport a stylish get up, wearing casual
clothes caters more to people’s need for simple
and comfy garments. Everytime we moved it was always to a better apartment.
While planning for this cleaning exercise, you may have to obtain any other item as necessary like
a basket, pantry and a refrigerator. Eggs your way but will be dumped in at
end so don,t pre-cook.

Stop by my blog post: kids summer day camps delray beach

2 i grow low level laser { 08.23.14 at 1:06 am }

Article Source: more information on how to regrow your hair
check out Total Hair Regrowth Review. Purchase shampoo or other hair care products
that are meant specifically for people with thinning hair.
Any cosmetic plastic procedure could be a worthwhile and
extraordinary experience for both the patient and surgeon, if this is done in the light of
surgical standards in term of safety.

Here is my blog – i grow low level laser

3 laser hair therapy At home { 08.31.14 at 5:47 pm }

It is an unfortunate irony that many “nutritional” products people take
to improve their appearance have the side effect of causing them to go bald.
The answer is what type of diet allows you as you age to
produce enough hydrochloric acid to digest your food properly so the fermenting food in your stomach
doesn’t cause other degenerative and inflammatory-related diseases.
There are a number of lasers used to remove locks like Ruby aesthetic
laser, Alexandrite laser, Pulsed diode array, Aragon aesthetic laser as well
as Nd:YAG.

My homepage: laser hair therapy At home

4 capillus272 seiko watches for men { 09.03.14 at 8:11 am }

My grandmother always advised me to use onion juice on my hair, but I thought
it was a crazy idea. During the treatment, the area is protected by using a dynamic cooling device that spreads cryogen onto the skin to cool the upper layer
and facilitates you maximum comfort. While you’re
trying to restore your tresses, try to avoid them.

Look at my web-site :: capillus272 seiko watches for men

5 percussion turkish coffee pot ibrik { 09.05.14 at 7:12 pm }

Its main centreѕ included HTB, Terry Virgo’s New Ϝrontiers family
of churches and Gerald Coates’ Рioneer People. Green said that Daryl was genuine when it came to soul and music.

As a good example of the observer, let’s look at a moose walking through a fߋrest,
just ցoing along its merry way.

Feel free to visit my webpage – percussion turkish coffee pot ibrik

6 skin care products organic { 09.18.14 at 5:47 am }

For the depressions of the skin (also termed scars) resulting from acne, there isn’t a
good OTC medication. You can choose among the natural
remedies, cosmetic products and surgery, and the medications.
If your hair is long and strong, you can go for any kind of style that suits your face or personality the best.

My web site … skin care products organic

7 facial plastic surgeon wall nj { 09.20.14 at 3:23 am }

This type of surgeon would be great if you are
looking to have a nose assignment. The smaller molecular size
of the Glycolic acid is precisely what makes its penetration better and
potentially superior to its fruit acid siblings.

In case that you have a medical problem or imperfections in the nasal area, this
treatment are often a great help.

my web blog :: facial plastic surgeon wall nj

8 weight loss using hcg drops { 09.20.14 at 8:23 pm }

However, he wrote this book for other doctors as a guide.
The Homeopathic HCG drops are diluted and are working with a distinct principle from the
other procedures. The most common side effects include: headache, nausea,
tender-skin, and upset stomach.

Look into my webpage … weight loss using hcg drops

9 hcg quick loss weight loss system { 10.02.14 at 2:10 am }

One more thing on which you need to pay attention to is fats and this is something that you should not be consumed
in the large amount. Don’t let yourself be baffled, acquiring benefits on the <. This is greatly do to the fact that eating and lifestyle choices were not in place once the weight had been eliminated.

Look into my blog: hcg quick
loss weight loss system

Leave a Comment