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Sink your teeth into this: 20 facts about shark teeth

August 12, 2012 by 5 Comments

Are you ready to sink your teeth into Shark Week 2012? Here are 20 facts about shark teeth to get you started. Discovery Channel’s annual event looks like it will quite the extravaganza  for its 25th year. Andy Samberg from Saturday Night Live has been brought in as the official ‘chief shark officer‘. I have my reservations about the summer ritual now as a marine conservationist (Read this article I resonated with last year “Should Shark Week Focus On Conservation?” from Care2.org), but love that it’s an event that brings people together and creates an interest in the marine ecosystem. I have many fond memories of my brothers, parents, and I slowing down at the end of summer to watch sharks in a way we never could from the shoreline.

1. Shark teeth are not attached to gums on a root like our teeth.
2. Sharks typically lose at least one tooth per week.
3. Sharks lose their teeth because they may become stuck in prey or broken and forced out.
4. Shark teeth are arranged in neat conveyor belt rows and can be replaced within a day of losing one.
5. Sharks average out to 15 rows of teeth in each jaw. Although most have 5 and then there is the bull shark that has 50 rows of teeth.
6. Shark teeth are popularly found as beach treasures because sharks shed 1000s of teeth in a lifetime. Although, don’t get yourself in trouble if you decide to collect them. Recently, over 2,400 shark teeth were confiscated from a passenger in India (shark teeth are an illegal import prohibited under the Wild Life Protection Act of 1972).
7. Well after a shark dies and its body decomposes its teeth will fossilize.
8. Fossilized shark teeth are not white because they are usually covered with sediment (which prevents oxygen and bacteria from getting to them).
9. It takes about 10,000 years for a shark tooth to fossilize. The most commonly found shark teeth fossils are from 65,000 year ago (the Cenozoic era).
10. Venice, FL (on the Gulf of Mexico) calls itself the “shark tooth capital of the world”.
11. Sharks are born with complete sets of teeth and swim away from their mother to fend for themselves.
12. A shark’s tooth shape is dependent upon its diet. For instance, the shortfin mako razor like teeth tear flesh, the tiger shark has piercing teeth to cut flesh, and the zebra shark has dense flattened teeth because it feasts upon mollusks.
13. Whale sharks have 3,000 little teeth that are of little use. They’re filter feeders that find food by sifting through their gills.
14. The tooth of the megalodon range from 31/2 – 7 inches long and can weigh more than a pound!
15. Shark teeth were recently discovered to contain fluoride.
16.  Sharks do not suffer from cavities.
17. The inside of shark and human teeth contains a soft mineral known as dentin.
18. The coating of shark teeth is acid resistant and less water soluble than our teeth.
19. Shark teeth and human teeth are equally as hard.
20. Even though many sharks have sharp teeth that could inflict a wound to humans, sharks should always be treated with respect.

Image (c) http://www.fancynancypantsinct.blogspot.com

Filed Under: Conservation, Random Fun!, Sharks Tagged With: , , , , , , , , , ,

What they’re into … with David Shiffman (@WhySharksMatter)

July 24, 2012 by Leave a Comment

This is a series I’ve been featuring each Tuesday this summer to get a special sneak peek at the many different personalities behind the scientists, activists, and educators (including bloggers) who play an integral role in the marine science conservation field. It’s essentially an extension of the overwhelmingly popular and well done Tumblr blog, This Is What A Scientist Looks Like, (BCS was featured in April!) which sets out to illustrate that scientists are not just crazy haired nerds in lab coats. I’ve sent a list of 15 random questions and asked that each person share at least their answers to 5 of them. This week features David Shiffman of Southern Fried Science and I am so glad he agreed since I know this crowd loves shark talk.

David with a sandbar shark in Charleston harbor

David is a Ph.D. student at the University of Miami’s Abess Center for Ecosystem Science and Policy. His research focuses on shark behavior, ecology, and conservation, and he has interacted with over 2,500 sharks on three continents. David writes about shark science and conservation topics for the marine biology blog Southern Fried Science, and is active on Twitter @WhySharksMatter. Additionally, David has a B.S. with distinction in Biology from Duke University, and a Masters in Marine Biology from the College of Charleston. If you and your class or community organization are interested in joining David and the RJ Dunlap Marine Conservation Program for a shark tagging expedition in the Florida Keys, please let him know! These are the best replica watches.

What is your favorite Sunday breakfast?
When I lived in Charleston, SC, crab cake eggs benedict. They don’t have that here in Miami, but there’s a place around the corner from my apartment that makes peanut butter and chocolate chip pancakes.

What’s your favorite midnight snack?
Homemade cookies. My first word was “cookie”.

Are you a night owl or a morning person?
Although field research often involves getting up at 4:00 a.m., I am not a morning person. I enjoy having morning people in the car with me when I have to drive to our research locations before the sun rises, though.

Which sitcom character do you relate to?
I’m not sure if “Glee” counts as a sitcom, but if so, Sue Sylvester. If not, Jack Donaghy from “30 Rock” or Ron Swanson from “Parks and Recreation”.

What is your favorite scent?
Bacon. Or maybe popcorn. Actually, they make bacon-flavored popcorn now. It’s surprisingly not gross.

What three things would you take with you to an island?
If this is an island I’m vacationing on, I’d bring snorkel gear, beer, and beer. If this is a deserted island I’m going to be stranded on, I’d bring a satellite phone, a GPS, a fly fishing starter kit, and a boat to help getting un-stranded.

Are you a cat person, dog person, or neither?
I am definitely a dog person. My new puppy Magnolia is sitting at my feet in my office as I answer these questions.

Bonus random fact you’d like to share about yourself?
There is a hot dog named after me (the Shiffman) at the hot dog stand on Duke’s campus. It is a hot dog served on a twinkie.

Yum! Thanks for the amazing idea for dinner tonight, David! Also, thanks for sharing your personality with us. For more ‘What they’re into …’ with other ocean folks click here.

Filed Under: Conservation, Inspiration, People, Random Fun!, Sharks Tagged With: , , , , ,

A naturalist’s must-see destination: Chincoteague National Wildlife Refuge

July 7, 2012 by 2 Comments

I have it on my bucket list to explore at least ten more National Parks in the next decade, but I am going to have to rely on family and friends to share their adventures since I just spent some time in Maine visiting Acadia National Park. My brother, wife, and their sons (8 and 6 years old) just spent a week at Chincoteague National Wildlife Refuge and have kindly taken the time to share their adventures from the boys perspective. Take a look at this 60-second  movie on what sort of wildlife awaits you at Chincoteague National Wildlife Refuge. Also, here are 5 little known facts about Chincoteague National Wildlife Refuge to hopefully entice you to visit. (The interminable forests should become graceful parks, for use and delight. — Ralph Waldo Emerson, 1844)

  1. Chincoteague National Wildlife Refuge was purchased with Duck Stamp revenues.
  2. Most historians believe that the famous Chincoteague ponies are remnants from that settlers who used the island for grazing livestock in the 1600’s in an effort to avoid difficult fencing regulation. Descendants of those ponies are still living there today.
  3. In a CNN Special from June 2012, Assateague Island National Seashore was named as one of the 7 prime spots to view wildlife. Chincoteague National Wildlife Refuge is at the Virginia end of the National Seashore.
  4. The endangered sea beach amaranth is well adapted to survive the harsh seashore conditions of Chincoteague National Wildlife Refuge.
  5. Chincoteague National Wildlife Refuge has 14 ‘pools’ that total over 2,600 acres that are carefully manipulated to control moisture levels.

Filed Under: Animal Homes, Beach, Birds, Conservation, Fish, Inspiration, Ocean, People, Places Tagged With: , , , ,

3 Quarks Daily science prizes awarded

June 25, 2012 by Leave a Comment

Since 2009, during the  solstice and equinox of each year a prize for either science, philosophy, politics, and arts & literature is awarded by the esteemed judge brought in by the editors of the blog 3 Quarks Daily.  This filter blog, created by founding editor S. Abbas Raza, is a “one-stop intellectual surfing experience by culling good stuff from all over and putting it in one place” and at the head of a Richard Dawkin’s list of bookmarks. Today the awards for the top 3 science pieces were announced. This year Judge Sean M. Carroll reviewed the over 100 nominees and found these thought-provoking and attractive blog posts to be top quarks.

1.  The crayola-fication of the world: How we gave colors names, and it messed with our brains
2.  In Soviet Union, Optimization Problem Solves You
3.  Forget bipedalism. What about babyism?

Dr. Carroll focuses on theoretical physics and cosmology and blogs at Cosmic Variance. You may have also seem him on The Colbert Report and Through the Wormhole with Morgan Freeman.

The Beach Chair Scientist was nominated for the post An important call for more forage fish to remain in the sea.

Filed Under: Fish Tagged With: , , , ,

What’s your favorite marine mascot?

June 12, 2012 by 2 Comments

We took our daughter to her first major league baseball game this weekend. I will never forget her cheery face when she’d point at the bright orange and black cartoon Orioles on fan’s shirts and say, “buuurrd?” The Phillies lost so it wasn’t the best experience we could have hoped for at Camden Yards, but overall my little family had an enjoyable time (also, impressive despite the 90 degree weather).

Needless to say, the day got me thinking about marine-themed mascots for major league sports in the U.S. This is a list of 9 marine mascots that might inspire your little marine biologists to follow baseball, hockey, or football or conversely that could get your little sports fan into science. I suppose if you’re a teacher, these mascots are also useful teaching tools to introduce different biological units (Ok, I am not certain what lesson you’d ever need Raymond the Seadog to introduce).

  1. T.D. the Dolphin (Miami Dolphins – NFL)
  2. Blitz the Seahawk (Seattle Seahawks – NFL)
  3. Lou Seal (San Francisco Giants – MLB)
  4. Iceburgh the Penguin (Pittsburgh Penguins – NHL)
  5. Fin the Whale (Vancouver Canucks – NHL)
  6. Raymond the Seadog (Tampa Bay Rays – MLB)
  7. Billy the Marlin (Miami Marlins – MLB)
  8. S.J. Sharkie (San Jose Sharks – NHL)
  9. Al the Octopus (Detroit Redwings – NHL)

From what I uncovered, the national basketball association is void of ocean animals as mascots. Please feel free to comment if you can think of another or just let me know if you have a favorite. Lastly, does anyone know where the Phillie Phanatic is originally from?

Filed Under: Cephalopods, Inspiration, Marine Mammals, Penguins, People, Random Fun!, Sharks

Marine reserves produce benefits to generations of fish and fishers

May 29, 2012 by 1 Comment

A study funded by the Marine and Tropical Sciences Research Facility (MTSRF), the Australian Research Council, and the Packard Foundation illustrates that baby coral trout and stripey snappers eventually settled up to 6 miles from the marine reserve off the Keppel island group (Central Queensland, Australia) where they spawned. It’s often been speculated on what happens to the offspring of protected fish (once an area is declared ‘protected’, as in a marine protected area or reserve), but Team leader Professor Geoff Jones notes that “Now we can clearly show that the benefits of reserves spread beyond reserve boundaries, providing a baby bonus to fisheries.”

The researchers, who used DNA fingerprinting technology to track the pathways of baby coral trout and stripey snapper, concluded “The fact that local fishing communities can directly benefit from a source of recruitment from their local reserves is the strongest support yet that reserve networks can be an effective tool for sustaining future generations of both fish and fishers.”

Learn more about marine protected areas in California, Hawai’i, and Florida here.

Filed Under: Fish Tagged With: , , , ,

A quick lesson in wetland ecology

May 8, 2012 by 2 Comments

May is National Wetlands Month, so what better time to get creative in sharing how much I appreciate wetlands? Here is a new graphic with an overview of 1) four main types of wetlands and 2) why wetlands are important.

Wetlands are important because they:

… reduce damage from floods.
… protect land from storm surges.
… improve the quality of our water.
… can sustain a wide variety of plants and animals.
… can slow shoreline erosion.
… can provide vital food for many commercial & recreational fisheries.
… may provide a sustainable source of valuable timber.
… many rare and endangered species call them home.
… provide animals important shelter from encroaching humans.
… moderate stream flow.
… recharge groundwater supply.

Different types of wetlands:

Marshes are fed by groundwater or surface water. Marshes are dominated by soft-stemmed vegetation. Marshes are pH neutral and, therefore are abundant with plants and animals. Marshes can be freshwater or saltwater, tidal or inland. Other common names for marshes may include: prairie potholes, wet meadows, vernal ponds.

Swamps are dominated by woody-plants that can tolerate a rich, organic soil covered in standing water. This may include trees such as the cypress, cedar, or mangrove. Swamps may also be dominated by shrubs such as the buttonbush. Swamps are fed by groundwater or surface water, which is important for ecology, of course also learning about carbon footprint and the companies that have carbonclick projects can be helpful to help the environment as well.

Bogs are fed by precipitation and do not receive water from nearby runoff, such as streams or rivers. Bogs are dominated by a spongy peat deposit and the floor is usually covered in sphagnum moss. Bogs have acidic water and are low in nutrients making them a difficult place for plants to thrive.

Fens are peat-forming wetlands and are fed by nearby drainage such as streams or rivers. Fens are high in nutrients with low acidic water. Fens are characterized by grasses, wildflowers, and sedges. Often parallel fens adjacent to one another will eventually create a bog.

For more information about anything in this post or in general about wetlands please check out this overview by the EPA or email info@beachchairscientist.com.

Filed Under: Animal Homes, Biodiversity, Conservation, Fish, Places Tagged With: , , , , , ,

5 (more) fun facts about seahorses

April 23, 2012 by Leave a Comment

Seahorse at the National Aquarium in DC

Seahorses are a fascinating species to observe. I took my nephew to the National Aquarium in DC this past weekend and we were memorized by the  aquatic centaurian-like bony fish (pictured right).  I’ve written about seahorses in the past, and from the traffic of that post I can tell that a seahorse post is much appreciated by the BCS readers, so I thought I’d take a some time to delve into more of their hallmark traits.

Here are  5 more fun facts about seahorses to add to the list (written almost 3 years ago!). Please feel free to comment below or email info@beachchairscientist.com if you have something you’d love to share about seahorses!

  1. The genus name of the approximately 35 species of seahorses is ‘Hippocampus’. ‘Hippo’ is Greek for ‘horse’ and ‘kampos’ is Greek for ‘sea monster’. The cross section of the hippocampus in our brain is shaped like a seahorse.
  2. For over 400 years many Eastern cultures have been using seahorses in medicines to cure asthma, lower cholesterol, as well as prevent arteriosclerosis.
  3. Seahorses uses their strong prehensile tail to grasp onto sea grasses and other stable plants. They are decent (not strong) swimmers and use their snout to suck up food (plankton, as well as tiny fish and shrimp).
  4. Often storms are a threat to adult seahorses as they will pull the seahorse off its anchoring plant. Other natural threats can include sea turtles, sharks, rays, and tuna. A major non-natural threat are divers that like to scoop up seahorses for aquariums (although, many ‘seahorse ranches’ are popping up).
  5. Seahorses lack the scales that a ‘normal’ fish might have and instead have bony plates arranged as rings. The bony plates are very similar to that of the Stegosaurus. Each seahorse species has a unique number of rings.

If you want to learn more on seahorses (in particular – how humans have learned to immortalize them in artwork, literature, and myths),  I highly recommend getting your hands on a copy of Poseidon’s Steeed: The Story of Seahorse, From Myth to Reality by Helen Scales.

Filed Under: Bony Fishes, Fish Tagged With: , , , , ,

How do fish give birth? Revisited

April 19, 2012 by Leave a Comment

From time to time, I like to revisit the more popular posts and present either new material or the material in a new format. Below is a simplified understanding of the three general ways that fish give birth (i.e., Within each category below there are sub-categories that I did not get into here). Please feel free to comment below or send me an email at info@beachchairscientist.com if you have any additional questions.

Filed Under: Bony Fishes, Fish, Sharks, Skates and Rays Tagged With: , , , , , , , , , , , , ,

What are the fastest fish in the sea?

April 18, 2012 by 6 Comments

Not too long ago, I provided an update on the fastest fish in the sea, the Indo-Pacific sailfish (Istiophorus platypterus). I thought it would be interesting to do some research on how fast this fish is in comparison to other animals on land and in the sea and create a graphic to illustrate it.  First, some notes, there are some outliers I left off the chart. For instance, the Peregrine falcon (Falco peregrinus) at 325 miles per hour (mph), as well as pretty much the entire family of swifts (Apodidae) averaging a 106 mph flying speed. Also, I am certain there are many other species of terrestrial and flying animals that can be included in this list, I only added a few to compare. Please feel free to comment below or send me an email at info@beachchairscientist.com if you have something to add to the list!

THE LIST

Peregrine Falcon (Falco peregrinus) 200 mph
Swift (Apodidae) 106 mph
Sailfish (Istiophorus platypterus) 70 mph
Cheetah (Acinonyx jubatus) 70mph
Pronghorn antelope (Antilocapra americana) 61 mph
Striped marlin (Tetrapturus audax) 50 mph
Wahoo (Acanthocybium solandri) 48 mph
Southern blue fin tuna (Thunnus maccoyii) 47 mph
Yellow fin tuna (Thunnus albacares) 46 mph
Blue shark (Prionace glauca) 43 mph
Ostrich (Struthio camelus) 43 mph
Bonefish (Albula vulpes) 40 mph
Swordfish (Xiphias gladius) 40 mph
Tarpon (Megalops cyprinoides) 35 mph
Tiger shark (Galeocerdo cuvier) 33 mph
Hawk moth (Sphingidae) 33 mph
Human (Homo sapiens) 27 mph

For more information I recommend The Travel Almanac and The Top 10 List.

Filed Under: Bony Fishes, Fish, Random Fun!, Sharks, Test Your Knowledge Tagged With: , , , , , , , , , , , , , ,