Showing posts with label ecology. Show all posts
Showing posts with label ecology. Show all posts

Friday, August 31, 2012

Puma concolor

Possibly everything you want to know about
Cougars / Pumas / Mountain Lions
(And links to more if this doesn't satisfy your curiosity)


Cougar in southern Utah

Stalking cougar (perserved) at BYU
Thanks to a friend, I've been learning more about cougars (Puma concolor) lately.  I knew a little about them from living in Utah County, where there are cougars in the mountains, and with BYU (nearby university) having the cougar as their mascot.



But in my ongoing quest to learn more (about pretty much everything that interests me) and share with others, I'm offering this information on these majestic animals.  Please also visit my friend's YouTube channel, the Mountain Lion Foundation website for conservation info, and petition to try to prevent them from going extinct here like they have in NE America!



Basic Facts
Scientific name: Puma concolor (meaning: cat of one color)
Common names: Cougar, puma, mountain lion, catamount (which may be a contraction of "cat of the mountain"), panther, and more.  It holds the Guinness world record for animal with the most names, with over 40 in English alone. (wikipedia)
Lifespan: 18-20 years
Diet: obligate carnivore (must eat meat to survive), generalist, eats any meat it can catch, from insects to large ungulates



Habitat: Alpine & subalpine habitats, Meadows & fields, Scrub, shrub & brushlands, Deserts, Swamps, marshes & bogs, Forests & woodlands, Canyons & caves
Red is their range
Orange is where they have gone extinct or been severely reduced.
2010, Wikipedia
Range: Rocky Mountains, Southwest, Florida, Texas, California, Northwest, Western Canada
The geographic range of the puma is the largest of any terrestrial mammal in the Western Hemisphere (Sunquist and Sunquist 2002), from Canada through the US, Central and South America to the southern tip of Chile (IUCN Red List).  Today, the Mountain Lion has a wider distribution in the Western Hemisphere than any other mammal except Homo sapiens, thriving from lowland tropical forests, swamps, and grassland, to mountain conifer forests, desertscrub, and any location with adequate cover and prey (Source).



Territory: Mountain lions go to great lengths to avoid other creatures, even other lions. Some studies suggest that the territory of a single lion can range upwards of 200 square miles (Wilderness Utah).

Here is an 8 minute video with a nice overview of biology and behavior of the mountain lion.  It compares the "American Lion" with the African Lion, shows their hearing and sight abilities in comparison to humans, their importance in an ecosystem, and a wealth of other basic info on cougars.



Please sign the petition to protect cougars and their habitat.

Basic Conservation information
Colorado Parks and Wildlife


They were extirpated from half of their north American range in the early1900s (thanks to a bounty on them which ended in the 1960s). According to IUCN Redlist they are listed as "Least Concern", however, their populations worldwide are declining and in several areas (including Florida) they are critically endangered. The two biggest issues are habitat loss (large cats need a large space) and hunting (both for "sport" and livestock control).

In most states you at least need a license. It is illegal to hunt them in California, but in Texas they have absolutely no protection at all. In all states where hunting is allowed (except Oregon) they are usually treed by hounds. They can then be killed at the hunter's leisure. In nearly every country in their South American range they are protected. US, Mexico and Canada are the last holdouts. There have been only about 20 cougar related fatalities in North America since 1880. 



Please sign the petition to protect cougars and their habitat.

Endangered Status
Two subspecies of the Mountain Lion are on the U.S. Endangered Species List. The Eastern Puma is classified as endangered throughout the eastern U.S., and the Florida Panther is classified as endangered in Florida. Because the Mountain Lion requires isolated or undisturbed game-rich wilderness, it has declined or been exterminated in much of the habitat where it once thrived early in the 20th century.

Mountain Peaks Gallery

Its habitat was overtaken by development in many areas, and its main prey, the White-tailed Deer, disappeared over much of its range. For many years, this large wildcat was pursued by bounty hunters and persecuted as a threat to livestock. In recent years, there have been a few sightings of animals or tracks in Canada’s Maritime Provinces and in upper New England, New York State, and elsewhere in the East, but most reports have turned out to be false. Radio-tracking is being used to study the behavior of Florida Panthers, and an office has been established to investigate reports of Eastern Puma sightings in the southern Appalachians. Currently the species is fully protected where rare, and classified as a game animal where abundant (eNature).

Please sign the petition to protect cougars and their habitat.

Here is a video overview of the issue, made in Oregon so at the end it talks about some statistics for Oregon, but the opening portion is general:


Please sign the petition to protect cougars and their habitat.

Anatomy
Bones
Have to put some bones, I'm a sucker for osteology!  They obviously have a very strong bite force, with a large open space for muscles to pass behind the zygomatic arch, from the site of attachment on the skull, down to the mandible.
Wikipedia





















Here is the entire skeleton with many bones labeled:

Source
Muscles
Source
Labels only partially visible, but this is just such a beautiful drawing I had to include it.
Source

Please sign the petition to protect cougars and their habitat.

Physiology and Behavior
(This section taken from wikipedia, as you can see by the hyperlinks...sorry.)  Despite its size, it is not typically classified among the "big cats", as it cannot roar, lacking the specialized larynx and hyoid apparatus of Panthera


Cougar with good view of large paws
Preserved cougar on BYU campus, Provo Utah
(entrance to the Wilkinson center)

Photo by me 8/31/2012
Cougars have large paws and proportionally the largest hind legs in the cat family.[35] This physique allows it great leaping and short-sprint ability. Cougars can jump 18 feet (5.5 meters) from the ground into a tree, and they have been known to jump 20 feet (6.1 meters) up or down a hillside. [46] The cougar can run as fast as 55 to 72 km/h (35 to 45 mi/h),[47] but is best adapted for short, powerful sprints rather than long chases. It is adept at climbing, which allows it to evade canine competitors. Although it is not strongly associated with water, it can swim.

Investigation in Yellowstone National Park showed that elk, followed by mule deer, were the cougar's primary targets; the prey base is shared with the park's gray wolves, with whom the cougar competes for resources.[50] Another study on winter kills (November–April) in Alberta showed that ungulates accounted for greater than 99% of the cougar diet.

Source
Though capable of sprinting, the cougar is typically an ambush predator. It stalks through brush and trees, across ledges, or other covered spots, before delivering a powerful leap onto the back of its prey and a suffocating neck bite. The cougar is capable of breaking the neck of some of its smaller prey with a strong bite and momentum bearing the animal to the ground.[40] 

Coyote, Wolf, and Cougar Blog

Kills are generally estimated at around one large ungulate every two weeks. The period shrinks for females raising young, and may be as short as one kill every three days when cubs are nearly mature at around 15 months.[35] The cat drags a kill to a preferred spot, covers it with brush, and returns to feed over a period of days. It is generally reported that the cougar is a non-scavenger and will rarely consume prey it has not killed; but deer carcasses left exposed for study were scavenged by cougars in California, suggesting more opportunistic behavior.

Please sign the petition to protect cougars and their habitat.

Reproduction
Males set up territories that overlap several females.  They typically mate between December and March, and 2-3 cubs are born after a 90-95 day gestation.
Cubs are born with a spotted coat, but the spots fade and usually disappear as the young become adults.  Cubs' eyes open at about 10 days, at which time their ears also unfold, teeth first erupt, and they begin playing (Encyclopedia of Life).
Animal Planet

Cubs nurse for 3 or 4 months, but begin to eat meat as early as 6 weeks of age. Young cats become independent when they are about 2 years old, and littermates stay together for a few months after leaving their mother (Hogle Zoo).

Photo Researchers


Again, please visit my friend's YouTube channel, the Mountain Lion Foundation website for conservation info, and sign the petition to protect pumas and their habitat!  It's not too late to protect these animals if people act now.  Let's not wait until it IS too late.  Thank you.

Holy crap! Maybe this wasn't such a good idea!

Thanks to my friend PumawithaPC for inspiring this post and caring so passionately about the puma.  I'm glad I had the chance to research Puma concolor and learn more about these magnificent animals.  Remember to sign the petition!

Thank you for reading.  Please comment to let me know what you found useful or interesting!  Thanks for visiting Bio Geo Nerd!

Hogle Zoo


Resources on this topic:
You Tube video on puma conservation
Mountain Lion Foundation (support them to help protect cougars)
Wikipedia info on cougar
Enature.com
Mountain Lion info for Oregon
Mountain Lion info for Utah
IUCN Red List (endangered species) cougar status and history
Info from San Pedro River Valley
Encyclopedia of Life
Hogle Zoo (Utah)

Sunday, July 15, 2012

Global Warming's Six Americas

If you need a quick overview, see the video on this post.  Click to view info and resources appropriate for the audience.  (Under construction)

Alarmed

Concerned

Cautious

Unconcerned

Doubtful

Dismissive

Info on local (Pacific North West) impacts of global warming


Some personal thoughts:
Climate change can be scary.  Many museums, zoos, aquariums, etc. shy away from the topic because it feels so doom and gloom.  However, I feel that shying away from it only adds fuel to the idea that scientists aren't in general agreement on the topic, which is false.  Also, having a timid approach with it I believe could also fuel that as well.  I don't think we should be afraid of having a bold stance about it.  The evidence is becoming more and more obvious (take the current heat wave for example) to everyone and I think the message is going to be more accepted. And I think it's a crucial message to get out.
Birch Aquarium in San Diego has an awesome exhibit on global warming.  Here are a couple videos about it:


Click here for another one that shows the science behind the exhibit


More general info:
NASA's key indicators of climate change: http://climate.nasa.gov/keyIndicators/

Friday, July 6, 2012

Alaskan Methane

Here is an interesting video I found of some research on Methane. Methane is being released due to thawing of the permafrost at the bottom of lakes near University of Alaska Fairbanks. It's short and explains it well so I'm not going to attempt it. And there are even cool pyrotechnics for your pleasure. :) This video was found on the National Snow and Ice Data Center website.

Tuesday, June 19, 2012

Yaquina Estuary

I had the opportunity to spend about 5 hours learning about the Yaquina Estuary today, including getting REALLY muddy on the mud flats at low tide at 6:30 in the morning, and me without rubber boots.
Our guide's feet sinking in the mud

It was awesome!  (Yes, mud and all.)  We also got to take the "estuary walk" tour given by a Hatfield Marine Science Center visitor center master docent, and also watch a power point about estuaries.  Grand total: 14 pages of notes.  Don't worry, I won't transcribe them all here.  You're welcome.

Estuary overview
What are the characteristics of an estuary?
  • Place where the river meets the sea
  • Mix of fresh and salt water
  • Protected from wave shock
  • Subject to tidal influence
Why are estuaries important?
  • Juvenile fish travel from the river to the ocean and can adapt to the salt water
  • Eel grass beds provide refuge or nurseries for many fish and invertebrates
  • Invertebrates and larvae are food for many other organisms
  • Provides food and stopover for migratory birds
  • Provides a buffer against a tsunami
 Yaquina Estuary specifically:
  • 5 square miles
  • watershed of 256 square miles (which is relatively small)
  • 95% of watershed is forest
  • 70% of water is exchanged during each tidal cycle
  • Well mixed estuary in summer - most of the water is coming from the ocean
  • Partially mixed estuary in winter - most of the water is coming from the river (wet season)

Here are some cool things we found on our mud flat adventure:
Polychaete (segmented worm) - Phylum Annelida

Mud shrimp (we found these all over the place, and collected a few)

This is a molt which I collected and am hoping will dry well so I can keep it

Our guide, Dr. John Chapman, expert in invasive species

This is the mud flat a few hours later after the tide came in
This picture above is a waxy kind of salt plant called coyote bush.  It's similar to many plants in the dessert.  Plants that live in the salt marsh have to have special adaptations to survive the salinity.  This plant does it by preventing evaporation, just as it would if it were in the dessert.  But here, instead of the evaporation being caused by heat, it would be caused by salt.

Bill showing us the groove on a snail which indicates it as a predator