The Right Blue's First Birthday

The Right Blue has a birthday coming up this week. Launched on July 15, 2007, The Right Blue is now one year old. To celebrate the blog's first year, we thought it would be fun to present a review of some highlights of the past 12 months, which we will do during the coming week.

By the way, we chose the photo at right for this birthday post because we thought it looked festive -- like a party favor. [Click on the photo to enlarge.]

Bobbie shot this macro photo of Social Feather Dusters (Bispira brunnea) off West Caicos, in the Turks and Caicos Islands. In case you are wondering about these creatures, they are annelid worms. They live inside those calcareous tubes, which they secrete, and they feed by extending those fluffy 'feather duster' parts to catch particles. You can see that some of the worms have retracted their 'feathers' into their tubes. (They're going to miss the birthday party!)

So then, back to the year-end review. Some of our regular readers have been with us since The Right Blue began, but we know we have acquired many new readers along the way, too. Some of those newer readers may not know much of the background about who we are, and how The Right Blue came to be. As a review, here are a few links to articles that will serve to explain some things about us, and about the project that came to be called The Right Blue:

About 'The Right Blue' - July 15, 2007

Prologue: How 'The Right Blue' project came about - July 16, 2007

Prologue: Our training as divers - July 20, 2007

Prologue: The supporting cast - August 1, 2007

Learning underwater photography -- The easy parts - August 5, 2007

Since you've asked: Answers to readers' questions - November 1, 2007

More to follow - including a collection of some of our favorite photos from The Right Blue, which we will post for Wordless Wednesday, this week and next.

What Brutus the Great Barracuda Saw

In the previous post I wrote about a Great Barracuda named Brutus who liked to follow Jerry around the reef at Puako. If you read that post, you'll recall that after a few experiments, we concluded that the big fish actually was attracted to the yellow sleeves on Jerry's wetsuit, probably because the color stood out so well against the background, compared to the black and dark blue suits the other divers in our group were wearing.

Today I was looking through some recently scanned photos, and by chance I came across this nice shot of Jerry with a school of Horse-eye Jacks. I took it with natural light -- no flash -- at Providenciales in the Turks and Caicos Islands. Looking first at the thumbnail, I thought, "This looks like a Right Blue photo." But when I enlarged it on my monitor, I knew instantly: "THIS is what Brutus saw!"

See what I mean? (Insert 'big grin' emoticon, heh heh.)

[Click on the photo to enlarge]

Loggerhead sea turtles need further protection

Over our lifetime of diving and being around the ocean, we have had close encounters with many sea turtles. We like sharing our sea turtle stories and photos, and we know that readers of The Right Blue like them, too. We've told our readers about Green sea turtles (Chelonia mydas) in Hawaii (including a special Green sea turtle named Myrtle), and yesterday we featured a Hawksbill turtle (Eretmochelys imbricata) that we had encountered in the Red Sea. Today we'd like to introduce you to another species of sea turtle.

Meet the Loggerhead (Caretta caretta). While there are populations of Loggerhead turtles around the world, the North Atlantic Loggerheads are genetically distinct from other populations. They are an important part of the marine ecosystem along the coasts of the southeastern United States, yet many marine scientists believe that they are on the brink of extinction.

In the past, Loggerheads were actively hunted for their meat, and their eggs were gathered as food. Today the species is protected internationally, although major threats to their survival remain. Loggerheads are most at risk from commercial fishing activities, and from degradation of their nesting grounds.

Loggerhead sea turtles become entangled in gill nets, and get caught in trawls and scallop dredges. Like all sea turtles, Loggerheads are air breathers, so they must surface from time to time in order to breathe. Entanglement in fishing gear prevents them from surfacing, so they drown. Turtles that do not drown outright often are injured in the process of struggling to escape fishing gear.

Fisheries that employ long-lines -- gear that consists of hundreds of baited hooks on a single line to catch fish -- also inadvertently catch Loggerheads. Long-line fishing is efficient, and is probably less ecologically damaging than trawling or dredging (in terms of 'by-catch'). Nevertheless, no one has yet discovered a method to eliminate the danger of long-lining to the sea turtles who are attracted to the bait, and who end up swallowing large steel fishing hooks along with that bait.

In the United States, there are Loggerhead nesting beaches along the Atlantic coast, particularly in North and South Carolina, Georgia, and Florida. Loggerheads also nest on beaches of States bordering the Gulf of Mexico, from Florida to Texas. Sadly, the number of nests on these beaches is declining, and in the case of Florida, the number of Loggerhead nests has declined by about 50% over the past decade -- a startling figure!

An explosion of beachfront development is partly to blame. Some coastal areas are simply being eliminated as nesting grounds as housing and commercial activities encroach on them. Other nesting areas are being damaged by pollution, and disturbed by human and motor vehicle traffic. Turtles swimming in populated areas also are more at risk from collisions with boats.

Today two conservation organizations, Oceana and the Center for Biological Diversity, have petitioned the Federal government of the United States to strengthen protection for North Atlantic Loggerhead turtles. They are urging the National Marine Fisheries Service, the agency responsible for protecting Loggerheads in ocean waters, and the U.S. Fish and Wildlife Service, the agency responsible for protecting turtles on land, to change the designation of these Loggerheads from "threatened" to "endangered" under the U.S. Endangered Species Act.

In addition to the threats from commercial fishing and degradation of nesting areas mentioned above, these conservationists also believe that climate change is now impacting the survival of Loggerheads. As summarized in a press release issued by Oceana and the Center for Biological Diversity:

Many marine biologists fear climate change will stress loggerhead sea turtle populations even further. Climate change can cause severe storms, erosion and sea level rise, all of which can affect sea turtle nesting on beaches. Rising temperatures caused by climate change may alter the timing or location of nesting or may increase the number of female turtles, because the sex of the hatchlings is temperature dependent. Climate change may also affect sea turtles by altering ocean currents and migration routes. Finally, ocean acidification caused by rising carbon dioxide levels breaks down the shells of preferred turtle prey, such as mollusks and crustaceans, and could alter turtles' food supply.

We decided to tell our readers about Loggerhead sea turtles today in support of this effort by Oceana and the Center for Biological Diversity to recruit greater protection for these magnificent animals. For more information, please visit the Sea Turtle pages on the Oceana website.

We have crossed paths with very few Loggerheads over the years. As a result, we had no photos of Loggerheads in our personal collection to use for this article. All of the photos accompanying today's post came from external sources. The nice Loggerhead portrait near the top of the page came from Wikimedia Commons, and the photos of the Loggerhead with the fishing hook in its mouth were supplied by Oceana. We thank the donors of these photos for allowing us to publish them on The Right Blue.

Some of the factual information in this article was derived from Oceana's report, Climate Change and Commerical Fishing: A One-Two Punch for Sea Turtles (12 page 'pdf' file), and the Loggerhead Sea Turtle 5-year Review, published in August of 2007 by the U.S. National Marine Fisheries Service, and the U.S. Fish and Wildlife Service. (67 page 'pdf' file)