Threats to Sea Turtles
How do we turn the tables for Sea Turtles?
It has been reported that only 1 in 1,000 hatchlings will live to reproduce. In order to turn around the sea turtle crisis, locals and visitor should endeavors to make small efforts that could greatly increase the survival rate of our sea turtle friends. Allowing greater opportunity for juvenile turtles to grow to maturity, and then have sustainable nesting grounds in a big part of sea turtle conservation. Located in the southern reaches of the NC coast, Ocean Isle Beach usually receives around 25 nests each summer. This is an opportunity for thousands of Leatherback, Loggerhead and Green sea turtle hatchlings to thrive.
Here are a few ways that you can help:
Pick up your trash! If you are having a fun day on the boat or at the beach, be sure to check and double check for your trash.
When you are packing the sunscreen and towels, grab a bag that will be used for any trash items. You can encourage your family to pick up trash that they see laying on the beach or in water. This is the perfect time to talk to your family about how trash affects wildlife. Shore birds, dolphin, fish, turtles and even people are affected by wayward trash.
If the public trash is full, take your trash with you. One gust of wind sweeping over a trash can that is spilling over, can send debris of all kinds onto the beach and into the water.
Report turtle nests and adult sea turtles. If you come across an unprotected nest or an adult sea turtle on Ocean Isle Beach, please report it immediately. Gather as much information as possible, such as location and condition of turtle. Please do not attempt to move the turtle, it could be a nesting female. If an animal is injured, touching it may result in unnecessary aggravation.
Know where nesting sites have been reported. Doing a little research will help to keep your family from accidentally damaging or interfering with an existing nesting site. Think turtles thoughts during the nesting season, May through September. When walking on the beach at night, use a red filter on your flashlights. Also, be sure to turn off exterior house lights that are facing the ocean. Turtles navigate by the light of moon, and can become confused by artificial light sources.
Threats to sea turtles are numerous and have caused many sea turtle species to be endangered. Of the seven extant species of sea turtles, six in the family Cheloniidae and one in the family Dermochelyidae, all are listed on the IUCN Red List of Endangered Species. The list classifies six species of sea turtle as "threatened", two of them as "critically endangered", one as "endangered" and three as "vulnerable". The flatback sea turtle is classified as "data deficient" which means that there is insufficient information available for a proper assessment of conservation status.
Although sea turtles usually lay around one hundred eggs at a time, on average only one out of a thousand will survive to adulthood. While many of the things that endanger these hatchlings are natural, such as predators including sharks, raccoons, foxes, and seagulls, many new threats to the sea turtle species have recently arrived and increased with the ever-growing presence of humans.
One of the greatest threats to the survival of hatchlings is artificial lighting. When a sea turtle hatches, its evolutionary instincts push it to move towards the brightest light in view, which naturally would be the sun or the moon, leading them toward the ocean horizon and into their new ecosystem. However, due to the continual expansion of cities, construction of condos and hotels on coasts everywhere has grown exponentially. With the invention of the light bulb and therefore artificial light, the sea turtle’s natural source of guiding light has been replaced and is no longer the only or the brightest thing of light. With virtually every coast in Mexico now constantly lit with buildings, the hatchlings become easily confused and turned around, few of them making successful treks to the ocean.
Marine pollution is both directly harmful to sea turtles as well as indirectly, through the deterioration of their natural habitats. Some of the most dangerous ocean pollutants include toxic metals, PCBs, fertilizers, untreated waste, chemicals, and a variety of petroleum products. Oil spills are particularly dangerous to sea turtles. Although oil does not tend to stick to them as it does to other marine life, sea turtles are still at risk when they surface for air, where oil can get in their eyes, skin, and lungs which can lead to significant health problems. Even if they are not directly in contact with marine pollution, sea turtles can still ingest harmful chemicals through the food they eat. Oil is also a cause for the death of seagrass, which is a large staple in the diet of the green turtle.
The diets of the hawksbill sea turtle, loggerhead sea turtle, and Kemp's ridley sea turtle species have also been affected by the oil’s role in the reduction of certain sponges and invertebrates. Extended exposure has been found to deteriorate the health of a sea turtle in general, making it more weak and vulnerable to a variety of other threats. According to the Sea Turtle Conservancy, formerly known as the Caribbean Conservation Program, the migration habits of sea turtles increase their exposure to marine pollution at each of the stages of their lives including eggs, hatchlings, juveniles, sub adults, or nesting adults.
The nesting of female sea turtles is often deterred due to the potential of oily effluence. If the female does lay eggs, the development of the eggs is still at risk due to either oil in the sand or contamination from the mother turtle that was oiled while nesting. If the eggs in the nest have contact with oil while in the last half of their incubation phase, the rate of hatchling survival sharply decreases and those that do survive have a greater chance of physical deformities.
Discarded plastic bags floating in the ocean resemble jellyfish, a common food of sea turtles. If a turtle eats a plastic foil, it tends to clog the turtle's digestive system and results in the animal dying. There have been many cases of dissection showing plastic foil and other debris inside turtles stomachs and intestines.
Owing to the popularity of numerous sea turtle species, people often travel to areas where the turtles nest or live to observe and photograph them. This has resulted in numerous deaths of the turtles through boat collisions, tourists attempting to catch or steal individuals, and other incidents. In Costa Rica, tourists have recently been criticised for interfering with the nesting habits of the resident Olive ridley sea turtles, disrupting and confusing the animals by attempting to take selfies with them.
Longline, trawl, and gillnet fishing are three types of fishing with the most sea turtle accidents. Deaths occur often because of drowning, where the sea turtle was ensnared and could not come up for air.Another dangerous aspect of fishing that is common is when sea turtles inadvertently swallow sharp hooks, which can get stuck within the soft tissue of the throat and stomach, or damage vital organs and intestines.
Captured sea turtle waiting to be slaughtered for meat at the Jamestown Fishing Harbor, Accra, Ghana.
In many countries sea turtles are captured, killed, and traded for their meat, shells and for their leather flippers. Eggs are also at risk of poaching and are commonly eaten by humans and are considered a delicacy in certain cultures. Other cultures believe sea turtle eggs to be aphrodisiacs, while others claim that eating them yields longevity. In some islands, parts of the sea turtle are used in ceremonies and are considered sacred. Other times, the carcasses harvested are made into jewelry, instruments, souvenirs, sunglasses, or wall decorations, especially of the Hawksbill variety which are desired for the striking details of the shell.
Placard "I speak for the sea turtles", at the People's Climate March (2017).
Global warming is estimated to have serious effects on wildlife over the next few decades. There is evidence that sea turtles have already been affected. With the increase of temperature, polar ice has melted and has led to the rise of sea levels. This rise in sea levels has been a factor in the loss of beach, which for sea turtles means less nesting area. Global warming has been associated with severe weather, which could mean harsh and numerous storms that erode beaches and flood nests. As the overall temperature of the earth rises, so does the temperature of the sand, which diminishes the rate of hatchling survival. The temperature of the sand also affects gender, as higher temperatures have been shown to yield more female hatchlings. Changes in climate also influence currents and change the number and location of prey species. Water that is too warm can also cause coral bleaching, which is detrimental to reefs that are essential to certain species, such as the Hawksbill sea turtle.
A sea turtle with fibropapillomatosis.
A disease known as fibropapillomatosis manifests itself in turtles through external tumors. These tumors often grow to be so large that they hinder a sea turtle’s ability to see, eat, and swim, therefore rendering the sea turtle unable to survive. Inexplicably, the majority of the cases of fibropapillomatosis have been diagnosed in the green sea turtle (Chelonia mydas) while none have been in the leatherback sea turtle(Dermochelys coriacea). Cases of this disease have been found in all major oceans. Although the causes of this disease are not clear, many believe the source to be viral. These tumors are either smooth or contain pointed projections and they are red, pink, grey, black, or purple in color. These tumors are usually located anywhere on the soft skin tissue of the sea turtle, either the neck, eyes, or bottom of the flippers and range in size anywhere from a pea to a grapefruit.
A study by Discovery News targets the Mediterranean, the Eastern Pacific, the Southwest Atlantic, and the Northwest Atlantic as the regions in the direst need of preservation endeavors. In 1963, the Marine Turtle Group was created by the chairman of the Survival Service Commission of the International Union for the Conservation of Nature and Natural Resources as the first international forum for sea turtle research and conservation. In the United States in 1973, the Endangered Species Act of 1973 was passed, providing protection for all sea turtle species, and in 1977, a Memorandum of Understanding was signed between the NOAA Fisheries and the U.S. Fish and Wildlife Service to enforce the ESA with regards to sea turtles. USFWS is responsible for all sea turtle conservation on nesting beaches and NOAA Fisheries are responsible for the marine conservation of sea turtles. The conservation of sea turtles on an international scale has been led by two major environmental agreements: the Indian Ocean – South-East Asian Marine Turtle Memorandum of Understanding and the Inter-American Convention for the Protection and Conservation of Sea Turtles. In an attempt to lessen the number of turtles killed by fishing incidents, several new types of turtle-safe fishing equipment have been introduced such as the circle hooks, fish bait, and turtle excluder devices. Poaching has been outlawed in most countries and turtle conservation education has been growing in both in size and efficiency.
Rehabilitation centers have been established as well, such as the Marine Life Center in Juno Beach, Florida and the Karen Beasley Sea Turtle Rescue and Rehabilitation Center located on Topsail Island, North Carolina. The purpose of these centers is to help protect the local and endangered sea turtle population by:
a) rescuing sick or injured turtles and taking them to the treatment facility,
b) rehabilitating these turtles through various types of treatment and/or surgery, and
c) releasing turtles back into the ocean once they have been successfully nursed back to health.
Although some sea turtles’ injuries are so severe that they can never become healed to the extent of being able to survive on their own outside of the facilities, hundreds of the patients from both the Gordon and Patricia Gray Veterinary Hospital in Juno Beach and the Sea Turtle Hospital in Topsail Island have been successfully rehabilitated and released in the last couple of decades.
Evaluating the progress of conservation programs is difficult, because many sea turtle populations have not been assessed adequately. Most information on sea turtle populations comes from counting nests on beaches, but this doesn’t provide an accurate picture of the whole sea turtle population. A 2010 United States National Research Council report concluded that more detailed information on sea turtles’ life cycles, such as birth rates and mortality, is needed.