Archive for March, 2009

Gopher Tortoise Crashes Ritzy Beach Party in Naples, Florida

Sunday, March 22nd, 2009

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Gopher Tortoise: “Where’s the Party?”

No self-respecting troglodyte turtle can resist the rumbling beat of a Southwest Florida beach party.  With the moniker “Gopherus polyphemus,” gopher tortoises certainly fall within this cadre.  Named after Homer’s mythical, cave-dwelling Cyclops Polyphemus who confronted Odysseus and his crew, the gopher tortoises of Naples occupy some of the finest burrows in the New World; caves that would be the envy of any Greek god or goddess.

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Burrow with Sea Breeze and View

Examples of these elegant accommodations can be found anywhere along the Naples coastline.  This especially appealing burrow offers a turtle’s eye view of Gulf Coast sunsets each night and is air conditioned by a steady sea breeze.  Shading vegetation creates a comfortable atmosphere for siestas during the heat of the day and offers tasty snacks within easy neck reach. 

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Gopher Tortoise Walks the Rope Line at Vanderbilt Beach

As you stroll Vandebilt Beach, don’t be surprised to encounter rope lines along gopher tortoise habitat.  At first we thought these barriers were erected to keep humans from interfering with turtles.  But as you can clearly see from the photo above, it’s the tortoises who walk the straight and narrow, so as not to interupt the beach fun of frolicking tourists.

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Gopher Tortoise High Rent District by the Ritz Carlton

Location, location, location!  The real high rent district for Southwest Florida’s gopher tortoises lies within burrowing distance of the Ritz Carlton Hotel in Naples.  For an earlier adventure with these upscale tortoises, see Gopher Tortoises “Puttin on the Ritz” in Naples, Florida.

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Gopher Tortoise Taking Mid-Morning Siesta

March 12th proved another perfect Florida day with a bright cloudless sky and temperatures in the low 80s.  Exploring Vanderbilt Beach, Sue Wieber Nourse spotted a large gopher tortoise in a burrow near the Ritz Carlton catching a few z’s during a mid-morning siesta.  Suddenly, a sensuous Gulf breeze wafted the jazzy melody of party music from the Ritz beach.  Apparently irresistible to a reptile’s ear, the rumbling beat seemed to lift the turtle from its lazy snooze and to tug this tortoise in the direction of the tented cabanas.

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Gopher Tortoise Crashes Ritzy Beach Party

With neither angst nor doubt, tortoise pursued the rhythm.  Cutting through dense underbrush, dodging tourists and beach crews, the turtle danced onward until its path was blocked by bottles and boxes and tools.  It lay in quiet frustration for a few minutes before its rescue by the Turtle Journal team.

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Tortoise “Card Check”

Since the turtle had crashed the beach party, it seemed appropriate for a casual “card check” to ensure that we weren’t serving the underaged.  A quick look at its annual growth lines showed that the tortoise more than qualified for adult status.

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Party Gopher Tortoise

Lifted out of its “boxed” canyon trap, the tortoise resumed its upbeat strut as it headed back towards the seductive quietude of its burrow.  Beach parties are okay, but in moderation to be sure.

 

Large Aggregation of Cownose Rays off Vanderbilt Beach in Southwest Florida

Friday, March 20th, 2009

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Aggregation of Cownose Rays off Vanderbilt Beach

Every Turtle Journal expedition into the field seems to produce a new surprise.  After more than three decades of exploration of the Southwest Florida coastline, one might expect the frequency of surprises to taper off.  But alas, they wonderfully keep occurring … which keeps us fully alert and engaged as we lug our gear down to the beach for a morning stroll.  March 10th and 11th dawned bright and warm with daytime temperature stretching into the 80s.  As Sue Wieber Nourse walked the Vanderbilt Beach shore in front of the Naples Ritz Carlton, she was thrilled to find a mass aggregation of cownose rays (Rhinoptera bonasus) sailing along the beach in knee deep water. 

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Cownose Ray (Rhinoptera bonasus)

The cownose ray, according to the Florida Museum of Natural History’s Ichthyology site, derives its scientific name (Rhinoptera) from the Greek “rhinos” for nose and “pteron” for wing.  Clearly, its “nose” represents the ray’s most distinctive and identifying feature.  Cownose rays can be found all along the Atlantic coastline from here in Cape Cod to the tip of Florida, as well as the shoreline of the Gulf of Mexico.

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Cownose Rays Fly Along Naples Coastline

While the cownose ray is a pelagic or ocean-going fish, it can be found along the warm, shallow coastline.  They are known to be gregarious, which may account for the mass aggregation Sue witnessed at Vanderbilt Beach.  They are benthic feeders, but also forage along the shoreline and in bays and estuaries.  Their menu includes quite a smorgasbord of critters from bivalves and gastropods to crabs, lobsters and finfish.

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Cownose Ray Aggregation off Vanderbilt Beach in Naples

Sue observed foraging activity close into the shoreline on both March 10th and 11th, as well as non-foraging behavior in slightly deeper water.  She saw this massive group swim both north and then south along Vanderbilt Beach at various times during the morning, rather than in a single direction as one might expect in a migration.

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Cownose Rays

Whatever the cause  of this mass aggregation, the sight of such majestic fish sailing effortless through the surf created a sensation for gawking tourists who had similarly flocked to Vanderbilt Beach to take advantage of these warm March days and to forage the coastal restaurants for fare ranging from “bivalves and gastropods to crabs, lobsters and finfish.”  I guess when you probe to the very gut of the matter there’s not too much difference among species.

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Southwest Florida Dolphins

While documenting the cownose rays, Sue was pleasantly surprised by a pod of dolphins that joined in the fun.  An overly curious juvenile dolphin broke from the pod and swam directly up to Sue to investigate what she was doing.  A perfect punctuate to a perfect Southwest Florida morning.

 

Welcome to Southwest Florida

Wednesday, March 18th, 2009

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Welcome to Southwest Florida

The Turtle Journal team recently completed an expedition to Southwest Florida.  For the next few weeks, we will bring you on virtual adventures to discover the critters and the habitat of the Southwest Florida coast, from Naples in the north to the Everglades in the south.  We will, as usual, intersperse these posting with real-time events out here in the Land of Ooze as the Great White North begins its annual spring awakening.

Juvenile Cold-Stunned Terrapin Rescued from Boat Meadow Beach in Eastham, Cape Cod

Wednesday, March 11th, 2009

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Three-Year-Old, Cold-Stunned Diamondback Terrapin

Those weeks between the depth of winter’s freeze and the arrival of spring temperatures in April present real risks to Outer Cape diamondback terrapins that have spent the cold, dark days since October buried under the oozy bottom of Cape Cod Bay estuaries, such as Boat Meadow Creek in Eastham.  Not often, but with enough frequency to effect at least a handful of these threatened turtles each year, terrapins become dislodged from their hibernacula either through severe natural conditions or human intervention.  Once exposed to the air and unprotected from nightly freezes, these critters face certain death unless they are discovered and rescued.  (See Frozen Diamondback Terrapin Rescued from Near Certain Death in Wellfleet Harbor from February 21st.)

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Low-Tide Drained Tidal Flats off Boat Meadow Creek in Eastham

Around four o’clock on Monday afternoon a call came into Mass Audubon’s Wellfleet Bay Wildlife Sanctuary.  A local twosome, Donna Cary and Roger McKenzie, were enjoying a sunny afternoon beachcombing along the tidal flats when they were surprised to find a small, distressed turtle mid-way down the tidal flats.

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Roger McKenzie and Donna Cary with Cold-Stunned Terrapin

As Donna noted, “It just didn’t seem to belong right there on the beach.”  They scooped up the obviously troubled critter and brought it back to their nearby cottage.  Having followed Mass Audubon‘s work with cold-stunned sea turtles, they laid down a towel on the floor and placed the terrapin in “dry dock” while they called for help.

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Juvenile Terrapin Shell Shows History of Hard Life in Eastham

This y0ung turtle showed signs of a fairly hard life in Eastham’s Boat Meadow Creek.  A substantial break in the shell between the third and fourth left costal scutes resulted from some earlier trauma such as a boat or instrument strike, since the wound had healed.  She had scrapes and scratches on carapace and plastron. 

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Cold-Stunned Juvenile Terrapin from Boat Meadow Beach

But her immediate problem is cold-stunning.  The most worrisome sign is the bleeding around the eyes, which she has yet to open.  Previous experience with terrapins that have endured cold-stunning has taught us that when the blood vessels in their eyes have popped, the chance of full recovery for release into the wild is vastly diminished.  It may be an indicator of irreversible brain damage.  Still, we never give up until the turtle gives up, and 24 hours is too soon to make a definitive prognosis.

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Close-Up Image of Three-Year-Old Cold-Stunned Diamondback Terrapin

The close-up photograph above provides a clear view of her annual growth rings in the first left costal scute with the original hatchling ring in the center and three yearly growth strips leading to the suture.

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Recovering Cold-Stunned 3-Year-Old Terrapin in Rehab

This seriously impaired turtle is resting comfortably in rehabilitation “dry dock” in a warm, humid environment.  Every few hours she is bathed gently in warm, fresh water to maintain her hydration while she recovers. 

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Cold-Stunned Juvenile Terrapin Resting Comfortably in Rehab

Diamondback Terrapin Siamese Twin Hatchlings

Wednesday, March 4th, 2009

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Diamondback Terrapin Siamese Twin Hatchlings

Conjoined terrapin hatchlings emerged from a nest in Eastham on the Outer Cape in August.  These Siamese twins were first documented on Turtle Journal in the posting entitled “Two-Headed Diamondback Terrapin Hatchling” in late August and updated in mid-January in an article called “Two-Headed Diamondback Terrapin Update.” 

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Plastron of Two-Headed Diamondback Terrapin

As noted in earlier postings, their shell appears relatively normal with an enlarged, split nuchal on the carapace and an extra, middle gular scute on the plastron. The left head seems to control the left two limbs and the right head appears to control the right two limbs.  After five months, the Siamese twins had still not been documented eating, despite presented food, and their activity levels had declined.  As you can observed in the image above, the yolk sac has largely been absorbed, leaving these hatchling with little energy reserve.

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Measuring Carapace Width of Siamese Twin Terrapin Hatchlings

On February 20th, the Turtle Journal team offered to help out with a more aggressive approach to get these special critters to begin eating, to increase their activity levels and, after their viability has been established through observation and medical examination, to find them a safe, permanent home.

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Recording Weight and Measurements of Siamese Twin Hatchlings

We recorded baseline numbers for the Siamese twins on February 20th as 5.6 grams weight, 2.573 centimeters straight-line carapace length, 2.405 centimeters carapace width, and 2.367 centimeters plastron length.  We’ll use these figures to judge the success of aggressive efforts to improve their viability.

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Siamese Twin Hatchlings Learning to Eat

The first step is to get the twins to eat.  Easy?  Nope.  Unlike snapping turtles that seem to pop out of their shells with mouths agape, necks extended and voraciously hungry, diamondback terrapin hatchlings demand time and lots of patience to get started eating.  The most successful formula we’ve employed involves raising the hatchlings’ body temperature to 78-to-80 degrees (F) and offering them plentiful brine shrimp for 30 minutes once a day in a separate eating container filled with about an inch of warm water.

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Two-Headed Hatchlings Begin Eating

After rejecting offered food for 10 days, the twins began eating last night, March 3rd.  The left head snagged the first brine shrimp; the right head got the hint and began munching nearby food.  As typical with terrapin hatchlings, they did not immediately gorge themselves, but picked a little and rested a lot.  Hopefully, their appetite will improve now that they know what those lips are supposed to be used for.  Still, yesterday marked a moment of celebration.  Without eating, the survivability of these precious youngsters would have been nil.  Now they have a fighting chance.