Showing posts with label Loggerhead nest. Show all posts
Showing posts with label Loggerhead nest. Show all posts

Sunday, June 05, 2011

Turtle Alert!!!

What a fantastic morning! I discovered a sea turtle crawl at Ft. Pickens and the mama turtle appeared to have nested.  We know that it was  a female coming ashore to nest because males never return to land after they have hatched and entered the water.


Unfortunately the nest was laid not far from the water and had to be relocated.  At the time I discovered it, the nest was 20' from the water line, right in the middle of the wrack line.   By the time the nest was excavated, it was 7' from the water line!  Timing is very important when it comes to moving a nest, especially one this low.

The crawl pattern was a bit difficult to dicipher, but I'm leaning toward a loggerhead even though the tracks looked pretty symmetrical.  A loggerhead has an alternating track.  A Green sea turtle has a symmetrical track, but displays a tail drag (unlike what is pictured here).

Another clue is that a loggerhead came ashore to nest on on May 19th, two and a half weeks ago.  Sea turtles skip years to nest, but in the year they are active they will come ashore every couple of weeks to lay a new nest. Consequently this could possibly be the same turtle that nested on May 19th!

Since sea turtles are a threatened or endangered species, volunteers may now only assist to a certain degree when it comes to an excavation and relocation. Bio-tech Rebecca Carruth came straight from her own patrol at Santa Rosa to help me and began to assess the situation.

We carefully dug down through the sand until we reached the eggs (Rebecca was right on the money when guessing where the eggs were deposited!). Sand from the nest was added to the bottom of our container and the eggs were gently lifted from the nest with as little movement as possible, taking care to avoid any rotation of the egg itself.

A close up of sea turtle eggs. They look exactly like ping-pong balls, don't they? And they appeared to be about the same size.

Rebecca lays the eggs in rows of 10, careful to keep them in order. The eggs will be placed in their new nest, created by Rebecca, about 150 feet north of the current location. They will also be placed in the nest in the exact same order they were removed from the original nest so that the bottom eggs will still be on the bottom and the top eggs will remain on top.

Approximately 60 days from now we should have ninety-nine tiny hatchlings emerge from this nest. We will be there to help them into the Gulf of Mexico and try to increase their rate of survival in the meantime by carefully monitoring the nest each day for any signs of predation, such as ghost crabs or other island critters such as raccoons, fox, opposum, and coyotes.

Life is good!!!

Wednesday, July 15, 2009

My first nest!!!

It finally happened! I finally found my very own sea turtle nest this morning!


This is what it looked like as I came upon the loggerhead crawl about half a mile east of Opal Beach around 6:00 a.m. The photo above is her trail from the nest, back to the spot where she re-entered the Gulf of Mexico.


The loggerhead came ashore sometime during the overnight hours and circled over the nesting area a couple of times before being satisfied it was the right place for her. After laying her eggs and covering them with sand, she headed west, back into the Gulf of Mexico.

If you click on the photo above to enlarge it, you will see an area of tossed sand at the top of the circle of tracks. That is the loggerhead nest.


A closer angle of the nest and the loggerhead's tracks. The nest was slightly over 70 feet from the water and the distance from where she came ashore to the spot she returned to the Gulf of Mexico was over 200 feet. Just imagine how much energy it took a 200+ lb. sea turtle to pull herself across that much sand with her flippers!


Aren't they splendid tracks!


I immediately called Monica Cain, a Bio-Tech with the Gulf Islands National Seashore. She arrived to mark the nest, GPS its location, and make sure I did the report and measurements properly. She even got to see me do the joy-dance! Hopefully I can be a bit more subdued and professional next time.


A closer look at the loggerhead's tracks.


The very first 'DZ' nest!