Hormone in crab eyes makes it possible for females to mate and care for their young
February 04, 2014
Those two crooked beady eyes peeking out of a the shell do more than just help blue crabs spot food in the murky waters of the Chesapeake Bay. They also produce important hormones responsible for the growth and development of a crab from an adolescent into a full-fledged adult. Scientists at the Institute of Marine and Environmental Technology in Maryland recently discovered a new hormone in those eyestalks responsible for forming body parts that make it possible for female crabs to mate and raise young.
"This is the first definitive evidence for the presence of a female-specific hormone in crabs that regulates the development of structures essential for mating and caring for their eggs," said author J. Sook Chung, an associate professor with the University of Maryland Center for Environmental Science. "This hormone is required for maternal care."
Scientists found that this crustacean female sex hormone (CSFH), present in the eyestalk of female blue crabs, or Calinectes sapidus, is integral to the maturation of the crab and development of reproductive structures needed for brooding and mating.
"For the first time in crustaceans, a substance that is critically involved in the control of expression of relevant adult anatomic features in females has been identified," said Russell Hill, Director of the Institute of Marine and Environmental Technology. "This is very significant basic research on a molecular level that also may have practical application in the future, as with most of the important research at IMET".
Female crabs mate only once in their lives, at the very moment that they molt for the final time and reach maturity. The female sex hormones trigger the development of a pair of special receptacles, called spemathecae, that store microscopic packets of sperm, or spermatophores, from the male crab. After mating, the sperm lives in these sacs for up to two years and will be used by the female crab several times to produce more fertilized eggs.
The hormone also triggers the development of hair-like external structures that hold fertilized eggs outside the female's body. The female crab extrudes more than two million eggs into a sponge-like mass that remains attached to her abdomen until the larvae emerge.
University of Maryland Center for Environmental Science
Related Hormone Current Events and Hormone News ArticlesFetuses more vulnerable to some environmental contaminants penetrating into cord blood
Toxic environmental contaminants are increasingly known to cause a number of severe health problems, in particular on fetuses, including heart failure, low cognitive ability, delayed development, and neurobehavioral disorders. Diabetes medication reduces dementia risk
Patients with type 2 diabetes have a dysfunctional sugar metabolism because the essential hormone insulin does not work effectively. Eavesdropping on the body: New device tracks chemical signals within cells
Biomedical engineers at the University of Toronto have invented a new device that more quickly and accurately "listens in" on the chemical messages that tell our cells how to multiply.Award-winning agent developed for prostate cancer diagnosis and treatment
Prostate-specific membrane antigen (PSMA) is a surface protein that is normally present on healthy prostate cells, but is found at much higher levels on prostate cancer cells. Stress in low-income families can affect children's learning
Children living in low-income households who endure family instability and emotionally distant caregivers are at risk of having impaired cognitive abilities according to new research from the University of Rochester.The successful ovulation of 100 eggs from 1 female mouse
The average number of eggs for genetically modified mice (knockout mice) obtained using previous methods of superovulation induction is about 20 but in reality the number is often much smaller, about 10 or less.Stress hormones could undermine breast cancer therapy
Recently, researchers have discovered that the hormone progesterone, an ingredient in contraceptives and menopausal hormone replacement therapies, might stimulate the growth of breast cancer cells that are resistant to anti-estrogen therapy and chemotherapy. Diet that mimics fasting appears to slow aging
Want to lose abdominal fat, get smarter and live longer? New research led by USC's Valter Longo shows that periodically adopting a diet that mimics the effects of fasting may yield a wide range of health benefits.Early life stress affects cognitive functioning in low-income children
About a fifth of all U.S. children live in poverty. These children are more likely to experience learning and cognitive delays. Researchers have tried to determine causes for this disparity, with recent work identifying the hormone cortisol as a possible reason because of its ability to pass the blood-brain barrier.Existing drug used in transplants causes older rats to lose weight
Aging can cause many changes to the body, including obesity and a loss of lean mass. Now, a group of University of Florida Health researchers has discovered that an existing drug reduces body fat and appetite in older rats, which has intriguing implications for aging humans.
More Hormone Current Events and Hormone News Articles
The Hormone Reset Diet: Heal Your Metabolism to Lose Up to 15 Pounds in 21 Days|
by Sara Gottfried (Author)
The Harvard-educated physician and New York Times bestselling author of The Hormone Cure shows you how to grow new receptors for your seven metabolic hormones, making you lose weight and feel great fast!When it comes to weight loss, most people don’t think about hormones. But when you develop resistance to your seven major metabolic hormones—cortisol, thyroid, testosterone, growth hormone, leptin, insulin, and estrogen—your body adjusts by increasingly raising your hormone levels and ultimately slowing down your metabolism. And a slower metabolism leads to weight gain and difficulty losing weight. The solution, Dr. Sara Gottfried contends, is to reset the efficiency of your hormones by repairing and growing new hormone receptors.Based on leading scientific research, The Hormone...
The Hormone Reset Diet: by Sara Gottfried M.D. | Action Summary | Key Takeaways, Action Items, & Implementation Strategies (Hormone Reset Diet, Hormones, ... Loss, Weight Loss for Women, Hormone Diet)|
A Take Action Summary Guide for The Hormone Reset Diet by Sara Gottfried M.D.
Inside You'll Find
Key Takeaways from each chapterAction Items to make it simple for you to follow throughImplementation Strategies to help you do-what-the-book-says
About The Hormone Reset Diet by Sara Gottfried M.D.
In The Hormone Reset Diet, Dr. Sarah Gottfried outlines a comprehensive, 21-day diet plan that selectively targets and resets every hormone system in the body, allowing you to lose weight, heal damaged systems, and increase your overall energy and well-being. This Take Action summary is designed as a companion to The Hormone Reset Diet, distilling all of the Key Takeaways, Action Items, and Implementation Strategies from each chapter into an easily-referenced...
The Hormone Secret: Discover Effortless Weight Loss and Renewed Energy in Just 30 Days|
by Dr. Tami Meraglia (Author), Daniel Amen (Foreword)
From an expert in integrative medicine, a thirty-day plan to help women lose weight and look and feel years younger.
As they grow older, many women struggle to lose weight. Unlike many men their age, they may also suffer from sleep problems, osteoporosis, and depression. Many women may even feel like they age less slowly and gracefully than their male counterparts.
Dr. Tami Meraglia knows that the magic word here is testosterone. While there is ample discussion in the medical community about the effects of estrogen loss, few people are aware of the importance of sufficient testosterone levels in women. A healthy dosage helps women slim down, improves their mood, lowers the risk of cardiac disease, increases energy and libido, prevents osteoporosis, enhances skin tone and...
Hormone Diet Cure: The Secret to Resettling Your Hormones|
by Loco Media
Hormone Diet Cure: A Healthy Way to Lose WeightThere are many fad diets that promise fast weight loss. Unfortunately, most of these diet regimens do not promote healthy weight loss and they put a lot of stress to the body because they encourage people to starve themselves.If you are looking for a healthy diet regimen that will help you lose weight fast, then the hormone diet cure is the best program for you. Unlike other diet regimens, the hormone diet cure promises weight loss and so much more. It acknowledges that the obstacle to healthy weight loss is to have imbalanced hormones in the body. The aim of this diet regimen is to stabilize your hormones so that you end up achieving healthy weight loss. If you want to follow this diet regimen, then let this book serve as your guide.With...
Dr. John Lee's Hormone Balance Made Simple: The Essential How-to Guide to Symptoms, Dosage, Timing, and More|
by John R. Lee (Author), Virginia Hopkins (Author)
The authors of the classice books on menopause andpremenopause bring women an easy-to-use guide on balancing hormonelevels safely and naturally
The Miraculous Results Of Extremely High Doses Of The Sunshine Hormone Vitamin D3 My Experiment With Huge Doses Of D3 From 25,000 To 50,000 To 100,000 Iu A Day Over A 1 Year Period|
by Jeff T Bowles (Author)
This updated edition has a fascinating new look at diabetes as an evolved defense to freezing damage in winter gone out of control- Don't miss it!
144+ Pages of
Fact-Packed Science Based Information-But FUN to read-
Upon realizing that taking 4,000 IU of Vitamin D3 a day was not enough for me, I decided to embark on a "dangerous" experiment that directly contradicted everything MD's had told me for years:
“DON'T TAKE TOO MUCH VITAMIN D IT IS DANGEROUS!”
I started taking 20,000 IU a day-50X times the recommended dose of 400 IU a day.
After about 4 months upped the dose to 50,000 IU a day or 150X the old recommended “safe” dose I then boosted it to 100,000 IU a day or 300 x TIMES the old maximum safe dose!
What happened over these...
Hormones for Bitches|
by Sarah M. Daccarett MD (Author)
Women today are suffering from obesity, depression, stress and dry woo-hoos! This book takes a hard look at medicine of today and melds it with cures and folklore of the past. The focus is on prevention of disease and balancing important hormones so we can stay youthful, live longer, happier and healthier lives. By offering treatment and current research, Dr. Daccarett gives hope to millions of women who suffer from hot flashes, headaches, tiredness, wrinkles and more! This book will change women's perceptions of hormones. You will be empowered to take control, be informed and demand changes in medicine. Why? Because you are worth it!
Herbal Hormone Handbook for Women: 41 Natural Remedies to Reset Hormones, Reduce Anxiety, Combat Fatigue and Control Weight (Herbs for Hormonal Balance, Weight Loss, Stress, Natural Healing)|
by Carma Books
Herbal Hormone Handbook for Women
Addressing hormonal symptoms for all important stages throughout life
41 Natural Remedies to Reset Hormones, Reduce Anxiety, Combat Fatigue and Control Weight
Learn how to help your body regain hormonal balance with simple herbal products, nutritive supplements and lifestyle improvements and feel the many benefits of a balanced body.
You might be wondering why you are unable to lose weight, why you feel persistent low energy, or why you feel anxious or stressed. It may not always be obvious that our hormones are out of balance and causing these symptoms. You may be relieved to learn that there are ways to detect hormonal imbalances and address them with gentle effective strategies.
Hormone Reset Diet: Delicious Recipes to Help You Reset Your Hormones And Lose Weight Fast|
The Breakthrough To Losing Weight And Keeping It Off Permanently Is Finally Here...
Today only, get this Amazon bestseller for just $0.99. Regularly priced
at $4.99. Read on your PC, Mac, smart phone, tablet or Kindle device.
You’re about to discover the secret to losing weight loss quickly and safely. You'll learn powerful secrets that will skyrocket your fat loss results in the shortest possible time! If you want to discover some powerful, delicious and fat exploding hormone reset diet recipes then please read this book right now.
Inside you'll discover....
What A Hormone Reset Diet IsBreakfast recipesLunch recipesDinner recipesDessert recipesTips and TricksMuch, much more!
Download your copy today!
Take action today and download this book for...