With Only 74 Southern Resident Orcas Left, New Protections Announced For Iconic Killer Whales
This week, the Canadian government announced a slew of measures to save the critically endangered species. The $61.5 million (US$50 million) initiative will address three key threats to the orcas: a lack of chinook salmon, the whales' favored prey; contaminants in the water; and vessel traffic and noise that interferes with their hunting abilities, according to a news release from the Fisheries and Oceans department.
The Canadian government is also looking to create new areas of critical habitat off the west coast of Vancouver Island for the killer whales, fisheries minister Jonathan Wilkinson told The Canadian Press on Wednesday. The Swiftsure in the Juan de Fuca Strait between Vancouver Island and Washington state, and La Perouse Bank off Tofino will be areas that the marine animals can call home, he said.
"We are in the process of consulting on those new critical habitat areas and expect to be able to move forward on them in the next couple of months," Wilkinson explained. "We are also talking about creation of killer whale sanctuaries, which essentially are within the areas of critical habitat ... which means that we can prohibit a range of different activities, not simply fisheries, where you can regulate that ships cannot go."
These efforts are part of a previously announced $167.4 million Whales Initiative to save the southern residents, whose population has dipped to only 74 individuals, down from 98 in 1995.
Their plight was underscored this summer when a mother whale Tahlequah, or J35, carried her dead calf for at least seventeen days and 1,000 miles in her heartbreaking "tour of grief" this August, according to the Center for Whale Research.
The next month, the ailing J50, another member of Tahlequah's pod, was declared missing and presumed dead after a three-day search in the waters between Washington state and Canada.
#Orca Whale #J50 'Missing and Now Presumed Dead' https://t.co/dLEFpXP6hB @NOAA @CWROrcas @oceana— EcoWatch (@EcoWatch)1537030830.0
Governments in Canada and the U.S. have made efforts to revive the iconic species. Earlier this year, Washington Gov. Jay Inslee signed an executive order to aid their recovery and the Chinook salmon they eat.
But will these efforts be enough to save the imperiled orcas? The majority of 74 southern residents left in the wild are not reproducing, meaning the opportunity to have more births than deaths is dwindling, Seattle's King 5 reported in September. Only two males are fathering all of the calves and only a few females are reproducing.
"There's only about four females having babies in the last decade," Center for Whale Research founder Ken Balcomb told the news station.
What's more, 75 percent of newborns in the recent two have not survived, and 100 percent of the pregnancies in the past three years have failed to produce viable offspring, the center notes.
"Without reproduction, there is no chance of survival," Balcomb said. "This is what extinction looks like in slow motion."
Correction: The headline of this article has been updated to provide greater clarity.
These whales are suffering a slow-motion #extinction. Learn more on our latest #blog: https://t.co/XTEbf4f5gw… https://t.co/eh5Mc1Wo9Z— Oceana (@Oceana)1540920619.0
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It is undisputed that vitamin D plays a role everywhere in the body and performs important functions. A severe vitamin D deficiency, which can occur at a level of 12 nanograms per milliliter of blood or less, leads to severe and painful bone deformations known as rickets in infants and young children and osteomalacia in adults. Unfortunately, this is where the scientific consensus ends.
Where Does the Deficiency Begin?<p>Nobody knows exactly how much vitamin D a person actually needs. The question of when a deficiency starts is correspondingly controversial. However, vitamin D is becoming increasingly popular.Not only is the pseudo-scientific literature on the "sun vitamin" experiencing an upswing, but the number of published studies has also increased enormously in recent years. For example, in 2019 <a href="https://academic.oup.com/edrv/article/40/4/1109/5126915" target="_blank">a study found that</a> Vitamin D is responsible for keeping the skeleton functional and is associated with cardiovascular diseases, type 2 diabetes and various types of cancer. <br></p>
An All-Rounder<p>Vitamin D levels in the body rise and fall according to sun exposure. If sufficient UV rays reach the skin, the body is able to produce the vitamin itself. However, the human body only derives an estimated 10 to 20 percent of its daily requirement from food.</p><p>The vitamin D that we synthesize from sunlight or food is not biologically active at first. Before the kidneys can produce the biologically active form of the vitamin, known as calcitriol, and release it into the blood, some metabolic processes must take place beforehand.</p><p>In addition, many organs have receptors to which the precursor of calcitriol binds. Further, this substance is also present in blood.</p><p>From this precursor, the organs then produce calcitriol themselves, which the body then uses for countless other processes in the body. This form of vitamin D thus regulates insulin secretion, inhibits tumor growth, and promotes the formation of red blood cells as well as the survival and activity of macrophages, which are important for the <a href="https://www.mdpi.com/2072-6643/5/7/2502/htm" target="_blank">immune system.</a></p>
Low Vitamin D, Severe COVID-19 Disease?<p>A research study carried out <a href="https://www.sciencedirect.com/science/article/pii/S2352364620300067?via%3Dihub" target="_blank">at the University of Hohenheim</a> has now established a link between vitamin D deficiency, certain previous diseases, and severe cases of COVID-19.</p><p>According to the study, "there is a lot of evidence that several non-communicable diseases (high blood pressure, diabetes, cardiovascular diseases, metabolic syndrome) are associated with low vitamin D plasma levels. These comorbidities, together with the often accompanying vitamin D deficiency, increase the risk of severe COVID-19 events."</p><p>"This statement is completely correct," said Martin Fassnacht, head of endocrinology at the University Hospital of Würzburg. However, he qualifies that it is a pure association, "i.e. a mere observation that these events occur together.</p><p>Dr. Fassnacht is very critical of the hype surrounding vitamin D, but not because he denies the vitamin serves important functions. However, studies on humans have not been able to show that vitamin D has the healing powers many often propagate.</p><p>Fassnacht says, "If you take a closer look, the hopes that the administration of vitamin D has a healing effect have not been confirmed so far."</p>
Association Versus Intervention Studies<p>Many studies on the vitamin are association or observational studies. "By definition, these studies cannot prove the causal relationship, but only point to mere correlations," said Fassnacht. The physician tries to illustrate this with an example:</p><p>"Imagine two groups of 80-year-olds. One group is spry, active and does sports. If you compare them with another group living in nursing homes, the difference in vitamin D levels will be dramatic. Life expectancy would also be extremely different."</p><p>But to try to explain the difference in fitness by vitamin D status alone is far too simplistic. "Vitamin D levels are a good measure of how sick someone is. But not more," says Fassnacht. </p><p>According to Fassnacht, none of the intervention studies carried out to date -- that specifically examined the effect of vitamin D on various diseases -- has been able to confirm the previous association and laboratory studies or the presumed positive effect of vitamin D.</p>
Further Research Is Needed<p>"If a coronavirus infection is suspected, it is therefore absolutely necessary to check the vitamin D status and quickly correct any possible deficit," said the recommendation of the paper published by the University of Hohenheim.</p><p>"Studies are underway to see whether vitamin D helps in COVID-19 infection, but I personally do not believe that this is really the case," says endocrinologist Fassnacht. Nevertheless, he says it is of course useful to carry out these studies.<br></p><p>"I don't want to rule out that there are actually subgroups of people who benefit from an additional vitamin D dose," he says. After all, this has been proven to be the case with a severe deficit.</p><p>In view of the study situation, Fassnacht does not think much of preventive, nationwide vitamin D substitutes. "My belief that the vitamin helps somewhere is very low. But, of course, I can be wrong."</p>
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